diff --git a/sh/Android.mk b/sh/Android.mk
index dcd13d8..ed6291a 100644
--- a/sh/Android.mk
+++ b/sh/Android.mk
@@ -1,61 +1,5 @@
-LOCAL_PATH:= $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES:= \
-	alias.c \
-	arith.c \
-	arith_lex.c \
-	builtins.c \
-	cd.c \
-	error.c \
-	eval.c \
-	exec.c \
-	expand.c \
-	input.c \
-	jobs.c \
-	main.c \
-	memalloc.c \
-	miscbltin.c \
-	mystring.c \
-	nodes.c \
-	options.c \
-	parser.c \
-	redir.c \
-	show.c \
-	syntax.c \
-	trap.c \
-	output.c \
-	var.c \
-	bltin/echo.c \
-	init.c
-
-LOCAL_MODULE:= ash
-LOCAL_MODULE_TAGS:= shell_ash
-
-LOCAL_CFLAGS += -DSHELL -DWITH_LINENOISE
-
-LOCAL_STATIC_LIBRARIES := liblinenoise
-
-LOCAL_C_INCLUDES += system/core/liblinenoise
-
-make_ash_files: PRIVATE_SRC_FILES := $(SRC_FILES)
-make_ash_files: PRIVATE_CFLAGS := $(LOCAL_CFLAGS)
-make_ash_files:
-	p4 edit arith.c arith_lex.c arith.h builtins.h builtins.c 
-	p4 edit init.c nodes.c nodes.h token.h 
-	sh ./mktokens
-	bison -o arith.c arith.y
-	flex -o arith_lex.c arith_lex.l
-	perl -ne 'print if ( /^\#\s*define\s+ARITH/ );' < arith.c > arith.h
-	sh ./mkbuiltins shell.h builtins.def . -Wall -O2
-	sh ./mknodes.sh nodetypes nodes.c.pat .
-	sh ./mkinit.sh $(PRIVATE_SRC_FILES) 
-
-include $(BUILD_EXECUTABLE)
-
-
-# create /system/bin/sh symlink to $(TARGET_SHELL)
-# not the optimal place for this, but a fitting one
+# Create the /system/bin/sh symlink to $(TARGET_SHELL).
+# Currently, Android's shell is external/mksh.
 
 OUTSYSTEMBINSH := $(TARGET_OUT)/bin/sh
 LOCAL_MODULE := systembinsh
diff --git a/sh/MODULE_LICENSE_BSD b/sh/MODULE_LICENSE_BSD
deleted file mode 100644
index e69de29..0000000
--- a/sh/MODULE_LICENSE_BSD
+++ /dev/null
diff --git a/sh/NOTICE b/sh/NOTICE
deleted file mode 100644
index 49a66d2..0000000
--- a/sh/NOTICE
+++ /dev/null
@@ -1,31 +0,0 @@
-Copyright (c) 1991, 1993
-     The Regents of the University of California.  All rights reserved.
-
-This code is derived from software contributed to Berkeley by
-Kenneth Almquist.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-1. Redistributions of source code must retain the above copyright
-   notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
-3. Neither the name of the University nor the names of its contributors
-   may be used to endorse or promote products derived from this software
-   without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGE.
-
-
diff --git a/sh/TOUR b/sh/TOUR
deleted file mode 100644
index f5c00c4..0000000
--- a/sh/TOUR
+++ /dev/null
@@ -1,357 +0,0 @@
-#	$NetBSD: TOUR,v 1.8 1996/10/16 14:24:56 christos Exp $
-#	@(#)TOUR	8.1 (Berkeley) 5/31/93
-
-NOTE -- This is the original TOUR paper distributed with ash and
-does not represent the current state of the shell.  It is provided anyway
-since it provides helpful information for how the shell is structured,
-but be warned that things have changed -- the current shell is
-still under development.
-
-================================================================
-
-                       A Tour through Ash
-
-               Copyright 1989 by Kenneth Almquist.
-
-
-DIRECTORIES:  The subdirectory bltin contains commands which can
-be compiled stand-alone.  The rest of the source is in the main
-ash directory.
-
-SOURCE CODE GENERATORS:  Files whose names begin with "mk" are
-programs that generate source code.  A complete list of these
-programs is:
-
-        program         intput files        generates
-        -------         ------------        ---------
-        mkbuiltins      builtins            builtins.h builtins.c
-        mkinit          *.c                 init.c
-        mknodes         nodetypes           nodes.h nodes.c
-        mksignames          -               signames.h signames.c
-        mksyntax            -               syntax.h syntax.c
-        mktokens            -               token.h
-        bltin/mkexpr    unary_op binary_op  operators.h operators.c
-
-There are undoubtedly too many of these.  Mkinit searches all the
-C source files for entries looking like:
-
-        INIT {
-              x = 1;    /* executed during initialization */
-        }
-
-        RESET {
-              x = 2;    /* executed when the shell does a longjmp
-                           back to the main command loop */
-        }
-
-        SHELLPROC {
-              x = 3;    /* executed when the shell runs a shell procedure */
-        }
-
-It pulls this code out into routines which are when particular
-events occur.  The intent is to improve modularity by isolating
-the information about which modules need to be explicitly
-initialized/reset within the modules themselves.
-
-Mkinit recognizes several constructs for placing declarations in
-the init.c file.
-        INCLUDE "file.h"
-includes a file.  The storage class MKINIT makes a declaration
-available in the init.c file, for example:
-        MKINIT int funcnest;    /* depth of function calls */
-MKINIT alone on a line introduces a structure or union declara-
-tion:
-        MKINIT
-        struct redirtab {
-              short renamed[10];
-        };
-Preprocessor #define statements are copied to init.c without any
-special action to request this.
-
-INDENTATION:  The ash source is indented in multiples of six
-spaces.  The only study that I have heard of on the subject con-
-cluded that the optimal amount to indent is in the range of four
-to six spaces.  I use six spaces since it is not too big a jump
-from the widely used eight spaces.  If you really hate six space
-indentation, use the adjind (source included) program to change
-it to something else.
-
-EXCEPTIONS:  Code for dealing with exceptions appears in
-exceptions.c.  The C language doesn't include exception handling,
-so I implement it using setjmp and longjmp.  The global variable
-exception contains the type of exception.  EXERROR is raised by
-calling error.  EXINT is an interrupt.  EXSHELLPROC is an excep-
-tion which is raised when a shell procedure is invoked.  The pur-
-pose of EXSHELLPROC is to perform the cleanup actions associated
-with other exceptions.  After these cleanup actions, the shell
-can interpret a shell procedure itself without exec'ing a new
-copy of the shell.
-
-INTERRUPTS:  In an interactive shell, an interrupt will cause an
-EXINT exception to return to the main command loop.  (Exception:
-EXINT is not raised if the user traps interrupts using the trap
-command.)  The INTOFF and INTON macros (defined in exception.h)
-provide uninterruptable critical sections.  Between the execution
-of INTOFF and the execution of INTON, interrupt signals will be
-held for later delivery.  INTOFF and INTON can be nested.
-
-MEMALLOC.C:  Memalloc.c defines versions of malloc and realloc
-which call error when there is no memory left.  It also defines a
-stack oriented memory allocation scheme.  Allocating off a stack
-is probably more efficient than allocation using malloc, but the
-big advantage is that when an exception occurs all we have to do
-to free up the memory in use at the time of the exception is to
-restore the stack pointer.  The stack is implemented using a
-linked list of blocks.
-
-STPUTC:  If the stack were contiguous, it would be easy to store
-strings on the stack without knowing in advance how long the
-string was going to be:
-        p = stackptr;
-        *p++ = c;       /* repeated as many times as needed */
-        stackptr = p;
-The folloing three macros (defined in memalloc.h) perform these
-operations, but grow the stack if you run off the end:
-        STARTSTACKSTR(p);
-        STPUTC(c, p);   /* repeated as many times as needed */
-        grabstackstr(p);
-
-We now start a top-down look at the code:
-
-MAIN.C:  The main routine performs some initialization, executes
-the user's profile if necessary, and calls cmdloop.  Cmdloop is
-repeatedly parses and executes commands.
-
-OPTIONS.C:  This file contains the option processing code.  It is
-called from main to parse the shell arguments when the shell is
-invoked, and it also contains the set builtin.  The -i and -j op-
-tions (the latter turns on job control) require changes in signal
-handling.  The routines setjobctl (in jobs.c) and setinteractive
-(in trap.c) are called to handle changes to these options.
-
-PARSING:  The parser code is all in parser.c.  A recursive des-
-cent parser is used.  Syntax tables (generated by mksyntax) are
-used to classify characters during lexical analysis.  There are
-three tables:  one for normal use, one for use when inside single
-quotes, and one for use when inside double quotes.  The tables
-are machine dependent because they are indexed by character vari-
-ables and the range of a char varies from machine to machine.
-
-PARSE OUTPUT:  The output of the parser consists of a tree of
-nodes.  The various types of nodes are defined in the file node-
-types.
-
-Nodes of type NARG are used to represent both words and the con-
-tents of here documents.  An early version of ash kept the con-
-tents of here documents in temporary files, but keeping here do-
-cuments in memory typically results in significantly better per-
-formance.  It would have been nice to make it an option to use
-temporary files for here documents, for the benefit of small
-machines, but the code to keep track of when to delete the tem-
-porary files was complex and I never fixed all the bugs in it.
-(AT&T has been maintaining the Bourne shell for more than ten
-years, and to the best of my knowledge they still haven't gotten
-it to handle temporary files correctly in obscure cases.)
-
-The text field of a NARG structure points to the text of the
-word.  The text consists of ordinary characters and a number of
-special codes defined in parser.h.  The special codes are:
-
-        CTLVAR              Variable substitution
-        CTLENDVAR           End of variable substitution
-        CTLBACKQ            Command substitution
-        CTLBACKQ|CTLQUOTE   Command substitution inside double quotes
-        CTLESC              Escape next character
-
-A variable substitution contains the following elements:
-
-        CTLVAR type name '=' [ alternative-text CTLENDVAR ]
-
-The type field is a single character specifying the type of sub-
-stitution.  The possible types are:
-
-        VSNORMAL            $var
-        VSMINUS             ${var-text}
-        VSMINUS|VSNUL       ${var:-text}
-        VSPLUS              ${var+text}
-        VSPLUS|VSNUL        ${var:+text}
-        VSQUESTION          ${var?text}
-        VSQUESTION|VSNUL    ${var:?text}
-        VSASSIGN            ${var=text}
-        VSASSIGN|VSNUL      ${var=text}
-
-In addition, the type field will have the VSQUOTE flag set if the
-variable is enclosed in double quotes.  The name of the variable
-comes next, terminated by an equals sign.  If the type is not
-VSNORMAL, then the text field in the substitution follows, ter-
-minated by a CTLENDVAR byte.
-
-Commands in back quotes are parsed and stored in a linked list.
-The locations of these commands in the string are indicated by
-CTLBACKQ and CTLBACKQ+CTLQUOTE characters, depending upon whether
-the back quotes were enclosed in double quotes.
-
-The character CTLESC escapes the next character, so that in case
-any of the CTL characters mentioned above appear in the input,
-they can be passed through transparently.  CTLESC is also used to
-escape '*', '?', '[', and '!' characters which were quoted by the
-user and thus should not be used for file name generation.
-
-CTLESC characters have proved to be particularly tricky to get
-right.  In the case of here documents which are not subject to
-variable and command substitution, the parser doesn't insert any
-CTLESC characters to begin with (so the contents of the text
-field can be written without any processing).  Other here docu-
-ments, and words which are not subject to splitting and file name
-generation, have the CTLESC characters removed during the vari-
-able and command substitution phase.  Words which are subject
-splitting and file name generation have the CTLESC characters re-
-moved as part of the file name phase.
-
-EXECUTION:  Command execution is handled by the following files:
-        eval.c     The top level routines.
-        redir.c    Code to handle redirection of input and output.
-        jobs.c     Code to handle forking, waiting, and job control.
-        exec.c     Code to to path searches and the actual exec sys call.
-        expand.c   Code to evaluate arguments.
-        var.c      Maintains the variable symbol table.  Called from expand.c.
-
-EVAL.C:  Evaltree recursively executes a parse tree.  The exit
-status is returned in the global variable exitstatus.  The alter-
-native entry evalbackcmd is called to evaluate commands in back
-quotes.  It saves the result in memory if the command is a buil-
-tin; otherwise it forks off a child to execute the command and
-connects the standard output of the child to a pipe.
-
-JOBS.C:  To create a process, you call makejob to return a job
-structure, and then call forkshell (passing the job structure as
-an argument) to create the process.  Waitforjob waits for a job
-to complete.  These routines take care of process groups if job
-control is defined.
-
-REDIR.C:  Ash allows file descriptors to be redirected and then
-restored without forking off a child process.  This is accom-
-plished by duplicating the original file descriptors.  The redir-
-tab structure records where the file descriptors have be dupli-
-cated to.
-
-EXEC.C:  The routine find_command locates a command, and enters
-the command in the hash table if it is not already there.  The
-third argument specifies whether it is to print an error message
-if the command is not found.  (When a pipeline is set up,
-find_command is called for all the commands in the pipeline be-
-fore any forking is done, so to get the commands into the hash
-table of the parent process.  But to make command hashing as
-transparent as possible, we silently ignore errors at that point
-and only print error messages if the command cannot be found
-later.)
-
-The routine shellexec is the interface to the exec system call.
-
-EXPAND.C:  Arguments are processed in three passes.  The first
-(performed by the routine argstr) performs variable and command
-substitution.  The second (ifsbreakup) performs word splitting
-and the third (expandmeta) performs file name generation.  If the
-"/u" directory is simulated, then when "/u/username" is replaced
-by the user's home directory, the flag "didudir" is set.  This
-tells the cd command that it should print out the directory name,
-just as it would if the "/u" directory were implemented using
-symbolic links.
-
-VAR.C:  Variables are stored in a hash table.  Probably we should
-switch to extensible hashing.  The variable name is stored in the
-same string as the value (using the format "name=value") so that
-no string copying is needed to create the environment of a com-
-mand.  Variables which the shell references internally are preal-
-located so that the shell can reference the values of these vari-
-ables without doing a lookup.
-
-When a program is run, the code in eval.c sticks any environment
-variables which precede the command (as in "PATH=xxx command") in
-the variable table as the simplest way to strip duplicates, and
-then calls "environment" to get the value of the environment.
-There are two consequences of this.  First, if an assignment to
-PATH precedes the command, the value of PATH before the assign-
-ment must be remembered and passed to shellexec.  Second, if the
-program turns out to be a shell procedure, the strings from the
-environment variables which preceded the command must be pulled
-out of the table and replaced with strings obtained from malloc,
-since the former will automatically be freed when the stack (see
-the entry on memalloc.c) is emptied.
-
-BUILTIN COMMANDS:  The procedures for handling these are scat-
-tered throughout the code, depending on which location appears
-most appropriate.  They can be recognized because their names al-
-ways end in "cmd".  The mapping from names to procedures is
-specified in the file builtins, which is processed by the mkbuil-
-tins command.
-
-A builtin command is invoked with argc and argv set up like a
-normal program.  A builtin command is allowed to overwrite its
-arguments.  Builtin routines can call nextopt to do option pars-
-ing.  This is kind of like getopt, but you don't pass argc and
-argv to it.  Builtin routines can also call error.  This routine
-normally terminates the shell (or returns to the main command
-loop if the shell is interactive), but when called from a builtin
-command it causes the builtin command to terminate with an exit
-status of 2.
-
-The directory bltins contains commands which can be compiled in-
-dependently but can also be built into the shell for efficiency
-reasons.  The makefile in this directory compiles these programs
-in the normal fashion (so that they can be run regardless of
-whether the invoker is ash), but also creates a library named
-bltinlib.a which can be linked with ash.  The header file bltin.h
-takes care of most of the differences between the ash and the
-stand-alone environment.  The user should call the main routine
-"main", and #define main to be the name of the routine to use
-when the program is linked into ash.  This #define should appear
-before bltin.h is included; bltin.h will #undef main if the pro-
-gram is to be compiled stand-alone.
-
-CD.C:  This file defines the cd and pwd builtins.  The pwd com-
-mand runs /bin/pwd the first time it is invoked (unless the user
-has already done a cd to an absolute pathname), but then
-remembers the current directory and updates it when the cd com-
-mand is run, so subsequent pwd commands run very fast.  The main
-complication in the cd command is in the docd command, which
-resolves symbolic links into actual names and informs the user
-where the user ended up if he crossed a symbolic link.
-
-SIGNALS:  Trap.c implements the trap command.  The routine set-
-signal figures out what action should be taken when a signal is
-received and invokes the signal system call to set the signal ac-
-tion appropriately.  When a signal that a user has set a trap for
-is caught, the routine "onsig" sets a flag.  The routine dotrap
-is called at appropriate points to actually handle the signal.
-When an interrupt is caught and no trap has been set for that
-signal, the routine "onint" in error.c is called.
-
-OUTPUT:  Ash uses it's own output routines.  There are three out-
-put structures allocated.  "Output" represents the standard out-
-put, "errout" the standard error, and "memout" contains output
-which is to be stored in memory.  This last is used when a buil-
-tin command appears in backquotes, to allow its output to be col-
-lected without doing any I/O through the UNIX operating system.
-The variables out1 and out2 normally point to output and errout,
-respectively, but they are set to point to memout when appropri-
-ate inside backquotes.
-
-INPUT:  The basic input routine is pgetc, which reads from the
-current input file.  There is a stack of input files; the current
-input file is the top file on this stack.  The code allows the
-input to come from a string rather than a file.  (This is for the
--c option and the "." and eval builtin commands.)  The global
-variable plinno is saved and restored when files are pushed and
-popped from the stack.  The parser routines store the number of
-the current line in this variable.
-
-DEBUGGING:  If DEBUG is defined in shell.h, then the shell will
-write debugging information to the file $HOME/trace.  Most of
-this is done using the TRACE macro, which takes a set of printf
-arguments inside two sets of parenthesis.  Example:
-"TRACE(("n=%d0, n))".  The double parenthesis are necessary be-
-cause the preprocessor can't handle functions with a variable
-number of arguments.  Defining DEBUG also causes the shell to
-generate a core dump if it is sent a quit signal.  The tracing
-code is in show.c.
diff --git a/sh/ThirdPartyProject.prop b/sh/ThirdPartyProject.prop
deleted file mode 100644
index eb9167e..0000000
--- a/sh/ThirdPartyProject.prop
+++ /dev/null
@@ -1,9 +0,0 @@
-# Copyright 2010 Google Inc. All Rights Reserved.
-#Fri Jul 16 10:03:08 PDT 2010
-currentVersion=Unknown
-version=1.17
-isNative=true
-name=ash
-keywords=ash
-onDevice=true
-homepage=http\://www.in-ulm.de/~mascheck/various/ash/
diff --git a/sh/alias.c b/sh/alias.c
deleted file mode 100644
index 59a3dc1..0000000
--- a/sh/alias.c
+++ /dev/null
@@ -1,273 +0,0 @@
-/*	$NetBSD: alias.c,v 1.12 2003/08/07 09:05:29 agc Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)alias.c	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: alias.c,v 1.12 2003/08/07 09:05:29 agc Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-#include "shell.h"
-#include "input.h"
-#include "output.h"
-#include "error.h"
-#include "memalloc.h"
-#include "mystring.h"
-#include "alias.h"
-#include "options.h"	/* XXX for argptr (should remove?) */
-#include "var.h"
-
-#define ATABSIZE 39
-
-struct alias *atab[ATABSIZE];
-
-STATIC void setalias(char *, char *);
-STATIC int unalias(char *);
-STATIC struct alias **hashalias(char *);
-
-STATIC
-void
-setalias(char *name, char *val)
-{
-	struct alias *ap, **app;
-
-	app = hashalias(name);
-	for (ap = *app; ap; ap = ap->next) {
-		if (equal(name, ap->name)) {
-			INTOFF;
-			ckfree(ap->val);
-			ap->val	= savestr(val);
-			INTON;
-			return;
-		}
-	}
-	/* not found */
-	INTOFF;
-	ap = ckmalloc(sizeof (struct alias));
-	ap->name = savestr(name);
-	/*
-	 * XXX - HACK: in order that the parser will not finish reading the
-	 * alias value off the input before processing the next alias, we
-	 * dummy up an extra space at the end of the alias.  This is a crock
-	 * and should be re-thought.  The idea (if you feel inclined to help)
-	 * is to avoid alias recursions.  The mechanism used is: when
-	 * expanding an alias, the value of the alias is pushed back on the
-	 * input as a string and a pointer to the alias is stored with the
-	 * string.  The alias is marked as being in use.  When the input
-	 * routine finishes reading the string, it markes the alias not
-	 * in use.  The problem is synchronization with the parser.  Since
-	 * it reads ahead, the alias is marked not in use before the
-	 * resulting token(s) is next checked for further alias sub.  The
-	 * H A C K is that we add a little fluff after the alias value
-	 * so that the string will not be exhausted.  This is a good
-	 * idea ------- ***NOT***
-	 */
-#ifdef notyet
-	ap->val = savestr(val);
-#else /* hack */
-	{
-	int len = strlen(val);
-	ap->val = ckmalloc(len + 2);
-	memcpy(ap->val, val, len);
-	ap->val[len] = ' ';	/* fluff */
-	ap->val[len+1] = '\0';
-	}
-#endif
-	ap->next = *app;
-	*app = ap;
-	INTON;
-}
-
-STATIC int
-unalias(char *name)
-{
-	struct alias *ap, **app;
-
-	app = hashalias(name);
-
-	for (ap = *app; ap; app = &(ap->next), ap = ap->next) {
-		if (equal(name, ap->name)) {
-			/*
-			 * if the alias is currently in use (i.e. its
-			 * buffer is being used by the input routine) we
-			 * just null out the name instead of freeing it.
-			 * We could clear it out later, but this situation
-			 * is so rare that it hardly seems worth it.
-			 */
-			if (ap->flag & ALIASINUSE)
-				*ap->name = '\0';
-			else {
-				INTOFF;
-				*app = ap->next;
-				ckfree(ap->name);
-				ckfree(ap->val);
-				ckfree(ap);
-				INTON;
-			}
-			return (0);
-		}
-	}
-
-	return (1);
-}
-
-#ifdef mkinit
-MKINIT void rmaliases(void);
-
-SHELLPROC {
-	rmaliases();
-}
-#endif
-
-void
-rmaliases(void)
-{
-	struct alias *ap, *tmp;
-	int i;
-
-	INTOFF;
-	for (i = 0; i < ATABSIZE; i++) {
-		ap = atab[i];
-		atab[i] = NULL;
-		while (ap) {
-			ckfree(ap->name);
-			ckfree(ap->val);
-			tmp = ap;
-			ap = ap->next;
-			ckfree(tmp);
-		}
-	}
-	INTON;
-}
-
-struct alias *
-lookupalias(char *name, int check)
-{
-	struct alias *ap = *hashalias(name);
-
-	for (; ap; ap = ap->next) {
-		if (equal(name, ap->name)) {
-			if (check && (ap->flag & ALIASINUSE))
-				return (NULL);
-			return (ap);
-		}
-	}
-
-	return (NULL);
-}
-
-char *
-get_alias_text(char *name)
-{
-	struct alias *ap;
-
-	ap = lookupalias(name, 0);
-	if (ap == NULL)
-		return NULL;
-	return ap->val;
-}
-
-/*
- * TODO - sort output
- */
-int
-aliascmd(int argc, char **argv)
-{
-	char *n, *v;
-	int ret = 0;
-	struct alias *ap;
-
-	if (argc == 1) {
-		int i;
-
-		for (i = 0; i < ATABSIZE; i++)
-			for (ap = atab[i]; ap; ap = ap->next) {
-				if (*ap->name != '\0') {
-					out1fmt("alias %s=", ap->name);
-					print_quoted(ap->val);
-					out1c('\n');
-				}
-			}
-		return (0);
-	}
-	while ((n = *++argv) != NULL) {
-		if ((v = strchr(n+1, '=')) == NULL) { /* n+1: funny ksh stuff */
-			if ((ap = lookupalias(n, 0)) == NULL) {
-				outfmt(out2, "alias: %s not found\n", n);
-				ret = 1;
-			} else {
-				out1fmt("alias %s=", n);
-				print_quoted(ap->val);
-				out1c('\n');
-			}
-		} else {
-			*v++ = '\0';
-			setalias(n, v);
-		}
-	}
-
-	return (ret);
-}
-
-int
-unaliascmd(int argc, char **argv)
-{
-	int i;
-
-	while ((i = nextopt("a")) != '\0') {
-		if (i == 'a') {
-			rmaliases();
-			return (0);
-		}
-	}
-	for (i = 0; *argptr; argptr++)
-		i = unalias(*argptr);
-
-	return (i);
-}
-
-STATIC struct alias **
-hashalias(char *p)
-{
-	unsigned int hashval;
-
-	hashval = *p << 4;
-	while (*p)
-		hashval+= *p++;
-	return &atab[hashval % ATABSIZE];
-}
diff --git a/sh/alias.h b/sh/alias.h
deleted file mode 100644
index 7ce25f4..0000000
--- a/sh/alias.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*	$NetBSD: alias.h,v 1.6 2003/08/07 09:05:29 agc Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)alias.h	8.2 (Berkeley) 5/4/95
- */
-
-#define ALIASINUSE	1
-
-struct alias {
-	struct alias *next;
-	char *name;
-	char *val;
-	int flag;
-};
-
-struct alias *lookupalias(char *, int);
-char *get_alias_text(char *);
-int aliascmd(int, char **);
-int unaliascmd(int, char **);
-void rmaliases(void);
diff --git a/sh/arith.c b/sh/arith.c
deleted file mode 100644
index f8f92a9..0000000
--- a/sh/arith.c
+++ /dev/null
@@ -1,1587 +0,0 @@
-/* A Bison parser, made by GNU Bison 1.875d.  */
-
-/* Skeleton parser for Yacc-like parsing with Bison,
-   Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-/* As a special exception, when this file is copied by Bison into a
-   Bison output file, you may use that output file without restriction.
-   This special exception was added by the Free Software Foundation
-   in version 1.24 of Bison.  */
-
-/* Written by Richard Stallman by simplifying the original so called
-   ``semantic'' parser.  */
-
-/* All symbols defined below should begin with yy or YY, to avoid
-   infringing on user name space.  This should be done even for local
-   variables, as they might otherwise be expanded by user macros.
-   There are some unavoidable exceptions within include files to
-   define necessary library symbols; they are noted "INFRINGES ON
-   USER NAME SPACE" below.  */
-
-/* Identify Bison output.  */
-#define YYBISON 1
-
-/* Skeleton name.  */
-#define YYSKELETON_NAME "yacc.c"
-
-/* Pure parsers.  */
-#define YYPURE 0
-
-/* Using locations.  */
-#define YYLSP_NEEDED 0
-
-
-
-/* Tokens.  */
-#ifndef YYTOKENTYPE
-# define YYTOKENTYPE
-   /* Put the tokens into the symbol table, so that GDB and other debuggers
-      know about them.  */
-   enum yytokentype {
-     ARITH_NUM = 258,
-     ARITH_LPAREN = 259,
-     ARITH_RPAREN = 260,
-     ARITH_OR = 261,
-     ARITH_AND = 262,
-     ARITH_BOR = 263,
-     ARITH_BXOR = 264,
-     ARITH_BAND = 265,
-     ARITH_NE = 266,
-     ARITH_EQ = 267,
-     ARITH_LE = 268,
-     ARITH_GE = 269,
-     ARITH_GT = 270,
-     ARITH_LT = 271,
-     ARITH_RSHIFT = 272,
-     ARITH_LSHIFT = 273,
-     ARITH_SUB = 274,
-     ARITH_ADD = 275,
-     ARITH_REM = 276,
-     ARITH_DIV = 277,
-     ARITH_MUL = 278,
-     ARITH_BNOT = 279,
-     ARITH_NOT = 280,
-     ARITH_UNARYPLUS = 281,
-     ARITH_UNARYMINUS = 282
-   };
-#endif
-#define ARITH_NUM 258
-#define ARITH_LPAREN 259
-#define ARITH_RPAREN 260
-#define ARITH_OR 261
-#define ARITH_AND 262
-#define ARITH_BOR 263
-#define ARITH_BXOR 264
-#define ARITH_BAND 265
-#define ARITH_NE 266
-#define ARITH_EQ 267
-#define ARITH_LE 268
-#define ARITH_GE 269
-#define ARITH_GT 270
-#define ARITH_LT 271
-#define ARITH_RSHIFT 272
-#define ARITH_LSHIFT 273
-#define ARITH_SUB 274
-#define ARITH_ADD 275
-#define ARITH_REM 276
-#define ARITH_DIV 277
-#define ARITH_MUL 278
-#define ARITH_BNOT 279
-#define ARITH_NOT 280
-#define ARITH_UNARYPLUS 281
-#define ARITH_UNARYMINUS 282
-
-
-
-
-/* Copy the first part of user declarations.  */
-#line 1 "arith.y"
-
-/*	$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)arith.y	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-#include "expand.h"
-#include "shell.h"
-#include "error.h"
-#include "output.h"
-#include "memalloc.h"
-
-const char *arith_buf, *arith_startbuf;
-
-void yyerror(const char *);
-#ifdef TESTARITH
-int main(int , char *[]);
-int error(char *);
-#endif
-
-
-
-/* Enabling traces.  */
-#ifndef YYDEBUG
-# define YYDEBUG 0
-#endif
-
-/* Enabling verbose error messages.  */
-#ifdef YYERROR_VERBOSE
-# undef YYERROR_VERBOSE
-# define YYERROR_VERBOSE 1
-#else
-# define YYERROR_VERBOSE 0
-#endif
-
-#if ! defined (YYSTYPE) && ! defined (YYSTYPE_IS_DECLARED)
-typedef int YYSTYPE;
-# define yystype YYSTYPE /* obsolescent; will be withdrawn */
-# define YYSTYPE_IS_DECLARED 1
-# define YYSTYPE_IS_TRIVIAL 1
-#endif
-
-
-
-/* Copy the second part of user declarations.  */
-
-
-/* Line 214 of yacc.c.  */
-#line 202 "arith.c"
-
-#if ! defined (yyoverflow) || YYERROR_VERBOSE
-
-# ifndef YYFREE
-#  define YYFREE free
-# endif
-# ifndef YYMALLOC
-#  define YYMALLOC malloc
-# endif
-
-/* The parser invokes alloca or malloc; define the necessary symbols.  */
-
-# ifdef YYSTACK_USE_ALLOCA
-#  if YYSTACK_USE_ALLOCA
-#   define YYSTACK_ALLOC alloca
-#  endif
-# else
-#  if defined (alloca) || defined (_ALLOCA_H)
-#   define YYSTACK_ALLOC alloca
-#  else
-#   ifdef __GNUC__
-#    define YYSTACK_ALLOC __builtin_alloca
-#   endif
-#  endif
-# endif
-
-# ifdef YYSTACK_ALLOC
-   /* Pacify GCC's `empty if-body' warning. */
-#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
-# else
-#  if defined (__STDC__) || defined (__cplusplus)
-#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
-#   define YYSIZE_T size_t
-#  endif
-#  define YYSTACK_ALLOC YYMALLOC
-#  define YYSTACK_FREE YYFREE
-# endif
-#endif /* ! defined (yyoverflow) || YYERROR_VERBOSE */
-
-
-#if (! defined (yyoverflow) \
-     && (! defined (__cplusplus) \
-	 || (defined (YYSTYPE_IS_TRIVIAL) && YYSTYPE_IS_TRIVIAL)))
-
-/* A type that is properly aligned for any stack member.  */
-union yyalloc
-{
-  short int yyss;
-  YYSTYPE yyvs;
-  };
-
-/* The size of the maximum gap between one aligned stack and the next.  */
-# define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1)
-
-/* The size of an array large to enough to hold all stacks, each with
-   N elements.  */
-# define YYSTACK_BYTES(N) \
-     ((N) * (sizeof (short int) + sizeof (YYSTYPE))			\
-      + YYSTACK_GAP_MAXIMUM)
-
-/* Copy COUNT objects from FROM to TO.  The source and destination do
-   not overlap.  */
-# ifndef YYCOPY
-#  if defined (__GNUC__) && 1 < __GNUC__
-#   define YYCOPY(To, From, Count) \
-      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
-#  else
-#   define YYCOPY(To, From, Count)		\
-      do					\
-	{					\
-	  register YYSIZE_T yyi;		\
-	  for (yyi = 0; yyi < (Count); yyi++)	\
-	    (To)[yyi] = (From)[yyi];		\
-	}					\
-      while (0)
-#  endif
-# endif
-
-/* Relocate STACK from its old location to the new one.  The
-   local variables YYSIZE and YYSTACKSIZE give the old and new number of
-   elements in the stack, and YYPTR gives the new location of the
-   stack.  Advance YYPTR to a properly aligned location for the next
-   stack.  */
-# define YYSTACK_RELOCATE(Stack)					\
-    do									\
-      {									\
-	YYSIZE_T yynewbytes;						\
-	YYCOPY (&yyptr->Stack, Stack, yysize);				\
-	Stack = &yyptr->Stack;						\
-	yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \
-	yyptr += yynewbytes / sizeof (*yyptr);				\
-      }									\
-    while (0)
-
-#endif
-
-#if defined (__STDC__) || defined (__cplusplus)
-   typedef signed char yysigned_char;
-#else
-   typedef short int yysigned_char;
-#endif
-
-/* YYFINAL -- State number of the termination state. */
-#define YYFINAL  14
-/* YYLAST -- Last index in YYTABLE.  */
-#define YYLAST   170
-
-/* YYNTOKENS -- Number of terminals. */
-#define YYNTOKENS  28
-/* YYNNTS -- Number of nonterminals. */
-#define YYNNTS  3
-/* YYNRULES -- Number of rules. */
-#define YYNRULES  26
-/* YYNRULES -- Number of states. */
-#define YYNSTATES  52
-
-/* YYTRANSLATE(YYLEX) -- Bison symbol number corresponding to YYLEX.  */
-#define YYUNDEFTOK  2
-#define YYMAXUTOK   282
-
-#define YYTRANSLATE(YYX) 						\
-  ((unsigned int) (YYX) <= YYMAXUTOK ? yytranslate[YYX] : YYUNDEFTOK)
-
-/* YYTRANSLATE[YYLEX] -- Bison symbol number corresponding to YYLEX.  */
-static const unsigned char yytranslate[] =
-{
-       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
-       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
-       5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
-      15,    16,    17,    18,    19,    20,    21,    22,    23,    24,
-      25,    26,    27
-};
-
-#if YYDEBUG
-/* YYPRHS[YYN] -- Index of the first RHS symbol of rule number YYN in
-   YYRHS.  */
-static const unsigned char yyprhs[] =
-{
-       0,     0,     3,     5,     9,    13,    17,    21,    25,    29,
-      33,    37,    41,    45,    49,    53,    57,    61,    65,    69,
-      73,    77,    81,    84,    87,    90,    93
-};
-
-/* YYRHS -- A `-1'-separated list of the rules' RHS. */
-static const yysigned_char yyrhs[] =
-{
-      29,     0,    -1,    30,    -1,     4,    30,     5,    -1,    30,
-       6,    30,    -1,    30,     7,    30,    -1,    30,     8,    30,
-      -1,    30,     9,    30,    -1,    30,    10,    30,    -1,    30,
-      12,    30,    -1,    30,    15,    30,    -1,    30,    14,    30,
-      -1,    30,    16,    30,    -1,    30,    13,    30,    -1,    30,
-      11,    30,    -1,    30,    18,    30,    -1,    30,    17,    30,
-      -1,    30,    20,    30,    -1,    30,    19,    30,    -1,    30,
-      23,    30,    -1,    30,    22,    30,    -1,    30,    21,    30,
-      -1,    25,    30,    -1,    24,    30,    -1,    19,    30,    -1,
-      20,    30,    -1,     3,    -1
-};
-
-/* YYRLINE[YYN] -- source line where rule number YYN was defined.  */
-static const unsigned char yyrline[] =
-{
-       0,    76,    76,    82,    83,    84,    85,    86,    87,    88,
-      89,    90,    91,    92,    93,    94,    95,    96,    97,    98,
-      99,   104,   109,   110,   111,   112,   113
-};
-#endif
-
-#if YYDEBUG || YYERROR_VERBOSE
-/* YYTNME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
-   First, the terminals, then, starting at YYNTOKENS, nonterminals. */
-static const char *const yytname[] =
-{
-  "$end", "error", "$undefined", "ARITH_NUM", "ARITH_LPAREN",
-  "ARITH_RPAREN", "ARITH_OR", "ARITH_AND", "ARITH_BOR", "ARITH_BXOR",
-  "ARITH_BAND", "ARITH_NE", "ARITH_EQ", "ARITH_LE", "ARITH_GE", "ARITH_GT",
-  "ARITH_LT", "ARITH_RSHIFT", "ARITH_LSHIFT", "ARITH_SUB", "ARITH_ADD",
-  "ARITH_REM", "ARITH_DIV", "ARITH_MUL", "ARITH_BNOT", "ARITH_NOT",
-  "ARITH_UNARYPLUS", "ARITH_UNARYMINUS", "$accept", "exp", "expr", 0
-};
-#endif
-
-# ifdef YYPRINT
-/* YYTOKNUM[YYLEX-NUM] -- Internal token number corresponding to
-   token YYLEX-NUM.  */
-static const unsigned short int yytoknum[] =
-{
-       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
-     265,   266,   267,   268,   269,   270,   271,   272,   273,   274,
-     275,   276,   277,   278,   279,   280,   281,   282
-};
-# endif
-
-/* YYR1[YYN] -- Symbol number of symbol that rule YYN derives.  */
-static const unsigned char yyr1[] =
-{
-       0,    28,    29,    30,    30,    30,    30,    30,    30,    30,
-      30,    30,    30,    30,    30,    30,    30,    30,    30,    30,
-      30,    30,    30,    30,    30,    30,    30
-};
-
-/* YYR2[YYN] -- Number of symbols composing right hand side of rule YYN.  */
-static const unsigned char yyr2[] =
-{
-       0,     2,     1,     3,     3,     3,     3,     3,     3,     3,
-       3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
-       3,     3,     2,     2,     2,     2,     1
-};
-
-/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state
-   STATE-NUM when YYTABLE doesn't specify something else to do.  Zero
-   means the default is an error.  */
-static const unsigned char yydefact[] =
-{
-       0,    26,     0,     0,     0,     0,     0,     0,     2,     0,
-      24,    25,    23,    22,     1,     0,     0,     0,     0,     0,
-       0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
-       0,     0,     0,     3,     4,     5,     6,     7,     8,    14,
-       9,    13,    11,    10,    12,    16,    15,    18,    17,    21,
-      20,    19
-};
-
-/* YYDEFGOTO[NTERM-NUM]. */
-static const yysigned_char yydefgoto[] =
-{
-      -1,     7,     8
-};
-
-/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
-   STATE-NUM.  */
-#define YYPACT_NINF -13
-static const short int yypact[] =
-{
-      28,   -13,    28,    28,    28,    28,    28,    12,    67,    49,
-     -13,   -13,   -13,   -13,   -13,    28,    28,    28,    28,    28,
-      28,    28,    28,    28,    28,    28,    28,    28,    28,    28,
-      28,    28,    28,   -13,    84,   100,   115,    23,   128,   139,
-     139,   -12,   -12,   -12,   -12,   144,   144,   147,   147,   -13,
-     -13,   -13
-};
-
-/* YYPGOTO[NTERM-NUM].  */
-static const yysigned_char yypgoto[] =
-{
-     -13,   -13,    -2
-};
-
-/* YYTABLE[YYPACT[STATE-NUM]].  What to do in state STATE-NUM.  If
-   positive, shift that token.  If negative, reduce the rule which
-   number is the opposite.  If zero, do what YYDEFACT says.
-   If YYTABLE_NINF, syntax error.  */
-#define YYTABLE_NINF -1
-static const unsigned char yytable[] =
-{
-       9,    10,    11,    12,    13,    26,    27,    28,    29,    30,
-      31,    32,    14,    34,    35,    36,    37,    38,    39,    40,
-      41,    42,    43,    44,    45,    46,    47,    48,    49,    50,
-      51,     1,     2,    19,    20,    21,    22,    23,    24,    25,
-      26,    27,    28,    29,    30,    31,    32,     3,     4,     0,
-       0,     0,     5,     6,    33,    15,    16,    17,    18,    19,
-      20,    21,    22,    23,    24,    25,    26,    27,    28,    29,
-      30,    31,    32,    15,    16,    17,    18,    19,    20,    21,
-      22,    23,    24,    25,    26,    27,    28,    29,    30,    31,
-      32,    16,    17,    18,    19,    20,    21,    22,    23,    24,
-      25,    26,    27,    28,    29,    30,    31,    32,    17,    18,
-      19,    20,    21,    22,    23,    24,    25,    26,    27,    28,
-      29,    30,    31,    32,    18,    19,    20,    21,    22,    23,
-      24,    25,    26,    27,    28,    29,    30,    31,    32,    20,
-      21,    22,    23,    24,    25,    26,    27,    28,    29,    30,
-      31,    32,    22,    23,    24,    25,    26,    27,    28,    29,
-      30,    31,    32,    28,    29,    30,    31,    32,    30,    31,
-      32
-};
-
-static const yysigned_char yycheck[] =
-{
-       2,     3,     4,     5,     6,    17,    18,    19,    20,    21,
-      22,    23,     0,    15,    16,    17,    18,    19,    20,    21,
-      22,    23,    24,    25,    26,    27,    28,    29,    30,    31,
-      32,     3,     4,    10,    11,    12,    13,    14,    15,    16,
-      17,    18,    19,    20,    21,    22,    23,    19,    20,    -1,
-      -1,    -1,    24,    25,     5,     6,     7,     8,     9,    10,
-      11,    12,    13,    14,    15,    16,    17,    18,    19,    20,
-      21,    22,    23,     6,     7,     8,     9,    10,    11,    12,
-      13,    14,    15,    16,    17,    18,    19,    20,    21,    22,
-      23,     7,     8,     9,    10,    11,    12,    13,    14,    15,
-      16,    17,    18,    19,    20,    21,    22,    23,     8,     9,
-      10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
-      20,    21,    22,    23,     9,    10,    11,    12,    13,    14,
-      15,    16,    17,    18,    19,    20,    21,    22,    23,    11,
-      12,    13,    14,    15,    16,    17,    18,    19,    20,    21,
-      22,    23,    13,    14,    15,    16,    17,    18,    19,    20,
-      21,    22,    23,    19,    20,    21,    22,    23,    21,    22,
-      23
-};
-
-/* YYSTOS[STATE-NUM] -- The (internal number of the) accessing
-   symbol of state STATE-NUM.  */
-static const unsigned char yystos[] =
-{
-       0,     3,     4,    19,    20,    24,    25,    29,    30,    30,
-      30,    30,    30,    30,     0,     6,     7,     8,     9,    10,
-      11,    12,    13,    14,    15,    16,    17,    18,    19,    20,
-      21,    22,    23,     5,    30,    30,    30,    30,    30,    30,
-      30,    30,    30,    30,    30,    30,    30,    30,    30,    30,
-      30,    30
-};
-
-#if ! defined (YYSIZE_T) && defined (__SIZE_TYPE__)
-# define YYSIZE_T __SIZE_TYPE__
-#endif
-#if ! defined (YYSIZE_T) && defined (size_t)
-# define YYSIZE_T size_t
-#endif
-#if ! defined (YYSIZE_T)
-# if defined (__STDC__) || defined (__cplusplus)
-#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
-#  define YYSIZE_T size_t
-# endif
-#endif
-#if ! defined (YYSIZE_T)
-# define YYSIZE_T unsigned int
-#endif
-
-#define yyerrok		(yyerrstatus = 0)
-#define yyclearin	(yychar = YYEMPTY)
-#define YYEMPTY		(-2)
-#define YYEOF		0
-
-#define YYACCEPT	goto yyacceptlab
-#define YYABORT		goto yyabortlab
-#define YYERROR		goto yyerrorlab
-
-
-/* Like YYERROR except do call yyerror.  This remains here temporarily
-   to ease the transition to the new meaning of YYERROR, for GCC.
-   Once GCC version 2 has supplanted version 1, this can go.  */
-
-#define YYFAIL		goto yyerrlab
-
-#define YYRECOVERING()  (!!yyerrstatus)
-
-#define YYBACKUP(Token, Value)					\
-do								\
-  if (yychar == YYEMPTY && yylen == 1)				\
-    {								\
-      yychar = (Token);						\
-      yylval = (Value);						\
-      yytoken = YYTRANSLATE (yychar);				\
-      YYPOPSTACK;						\
-      goto yybackup;						\
-    }								\
-  else								\
-    { 								\
-      yyerror ("syntax error: cannot back up");\
-      YYERROR;							\
-    }								\
-while (0)
-
-#define YYTERROR	1
-#define YYERRCODE	256
-
-/* YYLLOC_DEFAULT -- Compute the default location (before the actions
-   are run).  */
-
-#ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)		\
-   ((Current).first_line   = (Rhs)[1].first_line,	\
-    (Current).first_column = (Rhs)[1].first_column,	\
-    (Current).last_line    = (Rhs)[N].last_line,	\
-    (Current).last_column  = (Rhs)[N].last_column)
-#endif
-
-/* YYLEX -- calling `yylex' with the right arguments.  */
-
-#ifdef YYLEX_PARAM
-# define YYLEX yylex (YYLEX_PARAM)
-#else
-# define YYLEX yylex ()
-#endif
-
-/* Enable debugging if requested.  */
-#if YYDEBUG
-
-# ifndef YYFPRINTF
-#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
-#  define YYFPRINTF fprintf
-# endif
-
-# define YYDPRINTF(Args)			\
-do {						\
-  if (yydebug)					\
-    YYFPRINTF Args;				\
-} while (0)
-
-# define YYDSYMPRINT(Args)			\
-do {						\
-  if (yydebug)					\
-    yysymprint Args;				\
-} while (0)
-
-# define YYDSYMPRINTF(Title, Token, Value, Location)		\
-do {								\
-  if (yydebug)							\
-    {								\
-      YYFPRINTF (stderr, "%s ", Title);				\
-      yysymprint (stderr, 					\
-                  Token, Value);	\
-      YYFPRINTF (stderr, "\n");					\
-    }								\
-} while (0)
-
-/*------------------------------------------------------------------.
-| yy_stack_print -- Print the state stack from its BOTTOM up to its |
-| TOP (included).                                                   |
-`------------------------------------------------------------------*/
-
-#if defined (__STDC__) || defined (__cplusplus)
-static void
-yy_stack_print (short int *bottom, short int *top)
-#else
-static void
-yy_stack_print (bottom, top)
-    short int *bottom;
-    short int *top;
-#endif
-{
-  YYFPRINTF (stderr, "Stack now");
-  for (/* Nothing. */; bottom <= top; ++bottom)
-    YYFPRINTF (stderr, " %d", *bottom);
-  YYFPRINTF (stderr, "\n");
-}
-
-# define YY_STACK_PRINT(Bottom, Top)				\
-do {								\
-  if (yydebug)							\
-    yy_stack_print ((Bottom), (Top));				\
-} while (0)
-
-
-/*------------------------------------------------.
-| Report that the YYRULE is going to be reduced.  |
-`------------------------------------------------*/
-
-#if defined (__STDC__) || defined (__cplusplus)
-static void
-yy_reduce_print (int yyrule)
-#else
-static void
-yy_reduce_print (yyrule)
-    int yyrule;
-#endif
-{
-  int yyi;
-  unsigned int yylno = yyrline[yyrule];
-  YYFPRINTF (stderr, "Reducing stack by rule %d (line %u), ",
-             yyrule - 1, yylno);
-  /* Print the symbols being reduced, and their result.  */
-  for (yyi = yyprhs[yyrule]; 0 <= yyrhs[yyi]; yyi++)
-    YYFPRINTF (stderr, "%s ", yytname [yyrhs[yyi]]);
-  YYFPRINTF (stderr, "-> %s\n", yytname [yyr1[yyrule]]);
-}
-
-# define YY_REDUCE_PRINT(Rule)		\
-do {					\
-  if (yydebug)				\
-    yy_reduce_print (Rule);		\
-} while (0)
-
-/* Nonzero means print parse trace.  It is left uninitialized so that
-   multiple parsers can coexist.  */
-int yydebug;
-#else /* !YYDEBUG */
-# define YYDPRINTF(Args)
-# define YYDSYMPRINT(Args)
-# define YYDSYMPRINTF(Title, Token, Value, Location)
-# define YY_STACK_PRINT(Bottom, Top)
-# define YY_REDUCE_PRINT(Rule)
-#endif /* !YYDEBUG */
-
-
-/* YYINITDEPTH -- initial size of the parser's stacks.  */
-#ifndef	YYINITDEPTH
-# define YYINITDEPTH 200
-#endif
-
-/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
-   if the built-in stack extension method is used).
-
-   Do not make this value too large; the results are undefined if
-   SIZE_MAX < YYSTACK_BYTES (YYMAXDEPTH)
-   evaluated with infinite-precision integer arithmetic.  */
-
-#if defined (YYMAXDEPTH) && YYMAXDEPTH == 0
-# undef YYMAXDEPTH
-#endif
-
-#ifndef YYMAXDEPTH
-# define YYMAXDEPTH 10000
-#endif
-
-
-
-#if YYERROR_VERBOSE
-
-# ifndef yystrlen
-#  if defined (__GLIBC__) && defined (_STRING_H)
-#   define yystrlen strlen
-#  else
-/* Return the length of YYSTR.  */
-static YYSIZE_T
-#   if defined (__STDC__) || defined (__cplusplus)
-yystrlen (const char *yystr)
-#   else
-yystrlen (yystr)
-     const char *yystr;
-#   endif
-{
-  register const char *yys = yystr;
-
-  while (*yys++ != '\0')
-    continue;
-
-  return yys - yystr - 1;
-}
-#  endif
-# endif
-
-# ifndef yystpcpy
-#  if defined (__GLIBC__) && defined (_STRING_H) && defined (_GNU_SOURCE)
-#   define yystpcpy stpcpy
-#  else
-/* Copy YYSRC to YYDEST, returning the address of the terminating '\0' in
-   YYDEST.  */
-static char *
-#   if defined (__STDC__) || defined (__cplusplus)
-yystpcpy (char *yydest, const char *yysrc)
-#   else
-yystpcpy (yydest, yysrc)
-     char *yydest;
-     const char *yysrc;
-#   endif
-{
-  register char *yyd = yydest;
-  register const char *yys = yysrc;
-
-  while ((*yyd++ = *yys++) != '\0')
-    continue;
-
-  return yyd - 1;
-}
-#  endif
-# endif
-
-#endif /* !YYERROR_VERBOSE */
-
-
-
-#if YYDEBUG
-/*--------------------------------.
-| Print this symbol on YYOUTPUT.  |
-`--------------------------------*/
-
-#if defined (__STDC__) || defined (__cplusplus)
-static void
-yysymprint (FILE *yyoutput, int yytype, YYSTYPE *yyvaluep)
-#else
-static void
-yysymprint (yyoutput, yytype, yyvaluep)
-    FILE *yyoutput;
-    int yytype;
-    YYSTYPE *yyvaluep;
-#endif
-{
-  /* Pacify ``unused variable'' warnings.  */
-  (void) yyvaluep;
-
-  if (yytype < YYNTOKENS)
-    {
-      YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
-# ifdef YYPRINT
-      YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
-# endif
-    }
-  else
-    YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
-
-  switch (yytype)
-    {
-      default:
-        break;
-    }
-  YYFPRINTF (yyoutput, ")");
-}
-
-#endif /* ! YYDEBUG */
-/*-----------------------------------------------.
-| Release the memory associated to this symbol.  |
-`-----------------------------------------------*/
-
-#if defined (__STDC__) || defined (__cplusplus)
-static void
-yydestruct (int yytype, YYSTYPE *yyvaluep)
-#else
-static void
-yydestruct (yytype, yyvaluep)
-    int yytype;
-    YYSTYPE *yyvaluep;
-#endif
-{
-  /* Pacify ``unused variable'' warnings.  */
-  (void) yyvaluep;
-
-  switch (yytype)
-    {
-
-      default:
-        break;
-    }
-}
-
-
-/* Prevent warnings from -Wmissing-prototypes.  */
-
-#ifdef YYPARSE_PARAM
-# if defined (__STDC__) || defined (__cplusplus)
-int yyparse (void *YYPARSE_PARAM);
-# else
-int yyparse ();
-# endif
-#else /* ! YYPARSE_PARAM */
-#if defined (__STDC__) || defined (__cplusplus)
-int yyparse (void);
-#else
-int yyparse ();
-#endif
-#endif /* ! YYPARSE_PARAM */
-
-
-
-/* The lookahead symbol.  */
-int yychar;
-
-/* The semantic value of the lookahead symbol.  */
-YYSTYPE yylval;
-
-/* Number of syntax errors so far.  */
-int yynerrs;
-
-
-
-/*----------.
-| yyparse.  |
-`----------*/
-
-#ifdef YYPARSE_PARAM
-# if defined (__STDC__) || defined (__cplusplus)
-int yyparse (void *YYPARSE_PARAM)
-# else
-int yyparse (YYPARSE_PARAM)
-  void *YYPARSE_PARAM;
-# endif
-#else /* ! YYPARSE_PARAM */
-#if defined (__STDC__) || defined (__cplusplus)
-int
-yyparse (void)
-#else
-int
-yyparse ()
-
-#endif
-#endif
-{
-  
-  register int yystate;
-  register int yyn;
-  int yyresult;
-  /* Number of tokens to shift before error messages enabled.  */
-  int yyerrstatus;
-  /* Lookahead token as an internal (translated) token number.  */
-  int yytoken = 0;
-
-  /* Three stacks and their tools:
-     `yyss': related to states,
-     `yyvs': related to semantic values,
-     `yyls': related to locations.
-
-     Refer to the stacks thru separate pointers, to allow yyoverflow
-     to reallocate them elsewhere.  */
-
-  /* The state stack.  */
-  short int yyssa[YYINITDEPTH];
-  short int *yyss = yyssa;
-  register short int *yyssp;
-
-  /* The semantic value stack.  */
-  YYSTYPE yyvsa[YYINITDEPTH];
-  YYSTYPE *yyvs = yyvsa;
-  register YYSTYPE *yyvsp;
-
-
-
-#define YYPOPSTACK   (yyvsp--, yyssp--)
-
-  YYSIZE_T yystacksize = YYINITDEPTH;
-
-  /* The variables used to return semantic value and location from the
-     action routines.  */
-  YYSTYPE yyval;
-
-
-  /* When reducing, the number of symbols on the RHS of the reduced
-     rule.  */
-  int yylen;
-
-  YYDPRINTF ((stderr, "Starting parse\n"));
-
-  yystate = 0;
-  yyerrstatus = 0;
-  yynerrs = 0;
-  yychar = YYEMPTY;		/* Cause a token to be read.  */
-
-  /* Initialize stack pointers.
-     Waste one element of value and location stack
-     so that they stay on the same level as the state stack.
-     The wasted elements are never initialized.  */
-
-  yyssp = yyss;
-  yyvsp = yyvs;
-
-
-  goto yysetstate;
-
-/*------------------------------------------------------------.
-| yynewstate -- Push a new state, which is found in yystate.  |
-`------------------------------------------------------------*/
- yynewstate:
-  /* In all cases, when you get here, the value and location stacks
-     have just been pushed. so pushing a state here evens the stacks.
-     */
-  yyssp++;
-
- yysetstate:
-  *yyssp = yystate;
-
-  if (yyss + yystacksize - 1 <= yyssp)
-    {
-      /* Get the current used size of the three stacks, in elements.  */
-      YYSIZE_T yysize = yyssp - yyss + 1;
-
-#ifdef yyoverflow
-      {
-	/* Give user a chance to reallocate the stack. Use copies of
-	   these so that the &'s don't force the real ones into
-	   memory.  */
-	YYSTYPE *yyvs1 = yyvs;
-	short int *yyss1 = yyss;
-
-
-	/* Each stack pointer address is followed by the size of the
-	   data in use in that stack, in bytes.  This used to be a
-	   conditional around just the two extra args, but that might
-	   be undefined if yyoverflow is a macro.  */
-	yyoverflow ("parser stack overflow",
-		    &yyss1, yysize * sizeof (*yyssp),
-		    &yyvs1, yysize * sizeof (*yyvsp),
-
-		    &yystacksize);
-
-	yyss = yyss1;
-	yyvs = yyvs1;
-      }
-#else /* no yyoverflow */
-# ifndef YYSTACK_RELOCATE
-      goto yyoverflowlab;
-# else
-      /* Extend the stack our own way.  */
-      if (YYMAXDEPTH <= yystacksize)
-	goto yyoverflowlab;
-      yystacksize *= 2;
-      if (YYMAXDEPTH < yystacksize)
-	yystacksize = YYMAXDEPTH;
-
-      {
-	short int *yyss1 = yyss;
-	union yyalloc *yyptr =
-	  (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize));
-	if (! yyptr)
-	  goto yyoverflowlab;
-	YYSTACK_RELOCATE (yyss);
-	YYSTACK_RELOCATE (yyvs);
-
-#  undef YYSTACK_RELOCATE
-	if (yyss1 != yyssa)
-	  YYSTACK_FREE (yyss1);
-      }
-# endif
-#endif /* no yyoverflow */
-
-      yyssp = yyss + yysize - 1;
-      yyvsp = yyvs + yysize - 1;
-
-
-      YYDPRINTF ((stderr, "Stack size increased to %lu\n",
-		  (unsigned long int) yystacksize));
-
-      if (yyss + yystacksize - 1 <= yyssp)
-	YYABORT;
-    }
-
-  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
-
-  goto yybackup;
-
-/*-----------.
-| yybackup.  |
-`-----------*/
-yybackup:
-
-/* Do appropriate processing given the current state.  */
-/* Read a lookahead token if we need one and don't already have one.  */
-/* yyresume: */
-
-  /* First try to decide what to do without reference to lookahead token.  */
-
-  yyn = yypact[yystate];
-  if (yyn == YYPACT_NINF)
-    goto yydefault;
-
-  /* Not known => get a lookahead token if don't already have one.  */
-
-  /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol.  */
-  if (yychar == YYEMPTY)
-    {
-      YYDPRINTF ((stderr, "Reading a token: "));
-      yychar = YYLEX;
-    }
-
-  if (yychar <= YYEOF)
-    {
-      yychar = yytoken = YYEOF;
-      YYDPRINTF ((stderr, "Now at end of input.\n"));
-    }
-  else
-    {
-      yytoken = YYTRANSLATE (yychar);
-      YYDSYMPRINTF ("Next token is", yytoken, &yylval, &yylloc);
-    }
-
-  /* If the proper action on seeing token YYTOKEN is to reduce or to
-     detect an error, take that action.  */
-  yyn += yytoken;
-  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
-    goto yydefault;
-  yyn = yytable[yyn];
-  if (yyn <= 0)
-    {
-      if (yyn == 0 || yyn == YYTABLE_NINF)
-	goto yyerrlab;
-      yyn = -yyn;
-      goto yyreduce;
-    }
-
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
-  /* Shift the lookahead token.  */
-  YYDPRINTF ((stderr, "Shifting token %s, ", yytname[yytoken]));
-
-  /* Discard the token being shifted unless it is eof.  */
-  if (yychar != YYEOF)
-    yychar = YYEMPTY;
-
-  *++yyvsp = yylval;
-
-
-  /* Count tokens shifted since error; after three, turn off error
-     status.  */
-  if (yyerrstatus)
-    yyerrstatus--;
-
-  yystate = yyn;
-  goto yynewstate;
-
-
-/*-----------------------------------------------------------.
-| yydefault -- do the default action for the current state.  |
-`-----------------------------------------------------------*/
-yydefault:
-  yyn = yydefact[yystate];
-  if (yyn == 0)
-    goto yyerrlab;
-  goto yyreduce;
-
-
-/*-----------------------------.
-| yyreduce -- Do a reduction.  |
-`-----------------------------*/
-yyreduce:
-  /* yyn is the number of a rule to reduce with.  */
-  yylen = yyr2[yyn];
-
-  /* If YYLEN is nonzero, implement the default value of the action:
-     `$$ = $1'.
-
-     Otherwise, the following line sets YYVAL to garbage.
-     This behavior is undocumented and Bison
-     users should not rely upon it.  Assigning to YYVAL
-     unconditionally makes the parser a bit smaller, and it avoids a
-     GCC warning that YYVAL may be used uninitialized.  */
-  yyval = yyvsp[1-yylen];
-
-
-  YY_REDUCE_PRINT (yyn);
-  switch (yyn)
-    {
-        case 2:
-#line 76 "arith.y"
-    {
-			return (yyvsp[0]);
-		;}
-    break;
-
-  case 3:
-#line 82 "arith.y"
-    { yyval = yyvsp[-1]; ;}
-    break;
-
-  case 4:
-#line 83 "arith.y"
-    { yyval = yyvsp[-2] ? yyvsp[-2] : yyvsp[0] ? yyvsp[0] : 0; ;}
-    break;
-
-  case 5:
-#line 84 "arith.y"
-    { yyval = yyvsp[-2] ? ( yyvsp[0] ? yyvsp[0] : 0 ) : 0; ;}
-    break;
-
-  case 6:
-#line 85 "arith.y"
-    { yyval = yyvsp[-2] | yyvsp[0]; ;}
-    break;
-
-  case 7:
-#line 86 "arith.y"
-    { yyval = yyvsp[-2] ^ yyvsp[0]; ;}
-    break;
-
-  case 8:
-#line 87 "arith.y"
-    { yyval = yyvsp[-2] & yyvsp[0]; ;}
-    break;
-
-  case 9:
-#line 88 "arith.y"
-    { yyval = yyvsp[-2] == yyvsp[0]; ;}
-    break;
-
-  case 10:
-#line 89 "arith.y"
-    { yyval = yyvsp[-2] > yyvsp[0]; ;}
-    break;
-
-  case 11:
-#line 90 "arith.y"
-    { yyval = yyvsp[-2] >= yyvsp[0]; ;}
-    break;
-
-  case 12:
-#line 91 "arith.y"
-    { yyval = yyvsp[-2] < yyvsp[0]; ;}
-    break;
-
-  case 13:
-#line 92 "arith.y"
-    { yyval = yyvsp[-2] <= yyvsp[0]; ;}
-    break;
-
-  case 14:
-#line 93 "arith.y"
-    { yyval = yyvsp[-2] != yyvsp[0]; ;}
-    break;
-
-  case 15:
-#line 94 "arith.y"
-    { yyval = yyvsp[-2] << yyvsp[0]; ;}
-    break;
-
-  case 16:
-#line 95 "arith.y"
-    { yyval = yyvsp[-2] >> yyvsp[0]; ;}
-    break;
-
-  case 17:
-#line 96 "arith.y"
-    { yyval = yyvsp[-2] + yyvsp[0]; ;}
-    break;
-
-  case 18:
-#line 97 "arith.y"
-    { yyval = yyvsp[-2] - yyvsp[0]; ;}
-    break;
-
-  case 19:
-#line 98 "arith.y"
-    { yyval = yyvsp[-2] * yyvsp[0]; ;}
-    break;
-
-  case 20:
-#line 99 "arith.y"
-    {
-			if (yyvsp[0] == 0)
-				yyerror("division by zero");
-			yyval = yyvsp[-2] / yyvsp[0];
-			;}
-    break;
-
-  case 21:
-#line 104 "arith.y"
-    {
-			if (yyvsp[0] == 0)
-				yyerror("division by zero");
-			yyval = yyvsp[-2] % yyvsp[0];
-			;}
-    break;
-
-  case 22:
-#line 109 "arith.y"
-    { yyval = !(yyvsp[0]); ;}
-    break;
-
-  case 23:
-#line 110 "arith.y"
-    { yyval = ~(yyvsp[0]); ;}
-    break;
-
-  case 24:
-#line 111 "arith.y"
-    { yyval = -(yyvsp[0]); ;}
-    break;
-
-  case 25:
-#line 112 "arith.y"
-    { yyval = yyvsp[0]; ;}
-    break;
-
-
-    }
-
-/* Line 1010 of yacc.c.  */
-#line 1276 "arith.c"
-
-  yyvsp -= yylen;
-  yyssp -= yylen;
-
-
-  YY_STACK_PRINT (yyss, yyssp);
-
-  *++yyvsp = yyval;
-
-
-  /* Now `shift' the result of the reduction.  Determine what state
-     that goes to, based on the state we popped back to and the rule
-     number reduced by.  */
-
-  yyn = yyr1[yyn];
-
-  yystate = yypgoto[yyn - YYNTOKENS] + *yyssp;
-  if (0 <= yystate && yystate <= YYLAST && yycheck[yystate] == *yyssp)
-    yystate = yytable[yystate];
-  else
-    yystate = yydefgoto[yyn - YYNTOKENS];
-
-  goto yynewstate;
-
-
-/*------------------------------------.
-| yyerrlab -- here on detecting error |
-`------------------------------------*/
-yyerrlab:
-  /* If not already recovering from an error, report this error.  */
-  if (!yyerrstatus)
-    {
-      ++yynerrs;
-#if YYERROR_VERBOSE
-      yyn = yypact[yystate];
-
-      if (YYPACT_NINF < yyn && yyn < YYLAST)
-	{
-	  YYSIZE_T yysize = 0;
-	  int yytype = YYTRANSLATE (yychar);
-	  const char* yyprefix;
-	  char *yymsg;
-	  int yyx;
-
-	  /* Start YYX at -YYN if negative to avoid negative indexes in
-	     YYCHECK.  */
-	  int yyxbegin = yyn < 0 ? -yyn : 0;
-
-	  /* Stay within bounds of both yycheck and yytname.  */
-	  int yychecklim = YYLAST - yyn;
-	  int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS;
-	  int yycount = 0;
-
-	  yyprefix = ", expecting ";
-	  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-	    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-	      {
-		yysize += yystrlen (yyprefix) + yystrlen (yytname [yyx]);
-		yycount += 1;
-		if (yycount == 5)
-		  {
-		    yysize = 0;
-		    break;
-		  }
-	      }
-	  yysize += (sizeof ("syntax error, unexpected ")
-		     + yystrlen (yytname[yytype]));
-	  yymsg = (char *) YYSTACK_ALLOC (yysize);
-	  if (yymsg != 0)
-	    {
-	      char *yyp = yystpcpy (yymsg, "syntax error, unexpected ");
-	      yyp = yystpcpy (yyp, yytname[yytype]);
-
-	      if (yycount < 5)
-		{
-		  yyprefix = ", expecting ";
-		  for (yyx = yyxbegin; yyx < yyxend; ++yyx)
-		    if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR)
-		      {
-			yyp = yystpcpy (yyp, yyprefix);
-			yyp = yystpcpy (yyp, yytname[yyx]);
-			yyprefix = " or ";
-		      }
-		}
-	      yyerror (yymsg);
-	      YYSTACK_FREE (yymsg);
-	    }
-	  else
-	    yyerror ("syntax error; also virtual memory exhausted");
-	}
-      else
-#endif /* YYERROR_VERBOSE */
-	yyerror ("syntax error");
-    }
-
-
-
-  if (yyerrstatus == 3)
-    {
-      /* If just tried and failed to reuse lookahead token after an
-	 error, discard it.  */
-
-      if (yychar <= YYEOF)
-        {
-          /* If at end of input, pop the error token,
-	     then the rest of the stack, then return failure.  */
-	  if (yychar == YYEOF)
-	     for (;;)
-	       {
-		 YYPOPSTACK;
-		 if (yyssp == yyss)
-		   YYABORT;
-		 YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
-		 yydestruct (yystos[*yyssp], yyvsp);
-	       }
-        }
-      else
-	{
-	  YYDSYMPRINTF ("Error: discarding", yytoken, &yylval, &yylloc);
-	  yydestruct (yytoken, &yylval);
-	  yychar = YYEMPTY;
-
-	}
-    }
-
-  /* Else will try to reuse lookahead token after shifting the error
-     token.  */
-  goto yyerrlab1;
-
-
-/*---------------------------------------------------.
-| yyerrorlab -- error raised explicitly by YYERROR.  |
-`---------------------------------------------------*/
-yyerrorlab:
-
-#ifdef __GNUC__
-  /* Pacify GCC when the user code never invokes YYERROR and the label
-     yyerrorlab therefore never appears in user code.  */
-  if (0)
-     goto yyerrorlab;
-#endif
-
-  yyvsp -= yylen;
-  yyssp -= yylen;
-  yystate = *yyssp;
-  goto yyerrlab1;
-
-
-/*-------------------------------------------------------------.
-| yyerrlab1 -- common code for both syntax error and YYERROR.  |
-`-------------------------------------------------------------*/
-yyerrlab1:
-  yyerrstatus = 3;	/* Each real token shifted decrements this.  */
-
-  for (;;)
-    {
-      yyn = yypact[yystate];
-      if (yyn != YYPACT_NINF)
-	{
-	  yyn += YYTERROR;
-	  if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR)
-	    {
-	      yyn = yytable[yyn];
-	      if (0 < yyn)
-		break;
-	    }
-	}
-
-      /* Pop the current state because it cannot handle the error token.  */
-      if (yyssp == yyss)
-	YYABORT;
-
-      YYDSYMPRINTF ("Error: popping", yystos[*yyssp], yyvsp, yylsp);
-      yydestruct (yystos[yystate], yyvsp);
-      YYPOPSTACK;
-      yystate = *yyssp;
-      YY_STACK_PRINT (yyss, yyssp);
-    }
-
-  if (yyn == YYFINAL)
-    YYACCEPT;
-
-  YYDPRINTF ((stderr, "Shifting error token, "));
-
-  *++yyvsp = yylval;
-
-
-  yystate = yyn;
-  goto yynewstate;
-
-
-/*-------------------------------------.
-| yyacceptlab -- YYACCEPT comes here.  |
-`-------------------------------------*/
-yyacceptlab:
-  yyresult = 0;
-  goto yyreturn;
-
-/*-----------------------------------.
-| yyabortlab -- YYABORT comes here.  |
-`-----------------------------------*/
-yyabortlab:
-  yyresult = 1;
-  goto yyreturn;
-
-#ifndef yyoverflow
-/*----------------------------------------------.
-| yyoverflowlab -- parser overflow comes here.  |
-`----------------------------------------------*/
-yyoverflowlab:
-  yyerror ("parser stack overflow");
-  yyresult = 2;
-  /* Fall through.  */
-#endif
-
-yyreturn:
-#ifndef yyoverflow
-  if (yyss != yyssa)
-    YYSTACK_FREE (yyss);
-#endif
-  return yyresult;
-}
-
-
-#line 115 "arith.y"
-
-int
-arith(s)
-	const char *s;
-{
-	long result;
-
-	arith_buf = arith_startbuf = s;
-
-	INTOFF;
-	result = yyparse();
-	arith_lex_reset();	/* reprime lex */
-	INTON;
-
-	return (result);
-}
-
-
-/*
- *  The exp(1) builtin.
- */
-int
-expcmd(argc, argv)
-	int argc;
-	char **argv;
-{
-	const char *p;
-	char *concat;
-	char **ap;
-	long i;
-
-	if (argc > 1) {
-		p = argv[1];
-		if (argc > 2) {
-			/*
-			 * concatenate arguments
-			 */
-			STARTSTACKSTR(concat);
-			ap = argv + 2;
-			for (;;) {
-				while (*p)
-					STPUTC(*p++, concat);
-				if ((p = *ap++) == NULL)
-					break;
-				STPUTC(' ', concat);
-			}
-			STPUTC('\0', concat);
-			p = grabstackstr(concat);
-		}
-	} else
-		p = "";
-
-	i = arith(p);
-
-	out1fmt("%ld\n", i);
-	return (! i);
-}
-
-/*************************/
-#ifdef TEST_ARITH
-#include <stdio.h>
-main(argc, argv)
-	char *argv[];
-{
-	printf("%d\n", exp(argv[1]));
-}
-error(s)
-	char *s;
-{
-	fprintf(stderr, "exp: %s\n", s);
-	exit(1);
-}
-#endif
-
-void
-yyerror(s)
-	const char *s;
-{
-
-//	yyerrok;
-	yyclearin;
-	arith_lex_reset();	/* reprime lex */
-	error("arithmetic expression: %s: \"%s\"", s, arith_startbuf);
-	/* NOTREACHED */
-}
-
-
diff --git a/sh/arith.h b/sh/arith.h
deleted file mode 100644
index f70c093..0000000
--- a/sh/arith.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#define ARITH_NUM 258
-#define ARITH_LPAREN 259
-#define ARITH_RPAREN 260
-#define ARITH_OR 261
-#define ARITH_AND 262
-#define ARITH_BOR 263
-#define ARITH_BXOR 264
-#define ARITH_BAND 265
-#define ARITH_NE 266
-#define ARITH_EQ 267
-#define ARITH_LE 268
-#define ARITH_GE 269
-#define ARITH_GT 270
-#define ARITH_LT 271
-#define ARITH_RSHIFT 272
-#define ARITH_LSHIFT 273
-#define ARITH_SUB 274
-#define ARITH_ADD 275
-#define ARITH_REM 276
-#define ARITH_DIV 277
-#define ARITH_MUL 278
-#define ARITH_BNOT 279
-#define ARITH_NOT 280
-#define ARITH_UNARYPLUS 281
-#define ARITH_UNARYMINUS 282
diff --git a/sh/arith.y b/sh/arith.y
deleted file mode 100644
index d51ed38..0000000
--- a/sh/arith.y
+++ /dev/null
@@ -1,199 +0,0 @@
-%{
-/*	$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)arith.y	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: arith.y,v 1.17 2003/09/17 17:33:36 jmmv Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-#include "expand.h"
-#include "shell.h"
-#include "error.h"
-#include "output.h"
-#include "memalloc.h"
-
-const char *arith_buf, *arith_startbuf;
-
-void yyerror(const char *);
-#ifdef TESTARITH
-int main(int , char *[]);
-int error(char *);
-#endif
-
-%}
-%token ARITH_NUM ARITH_LPAREN ARITH_RPAREN
-
-%left ARITH_OR
-%left ARITH_AND
-%left ARITH_BOR
-%left ARITH_BXOR
-%left ARITH_BAND
-%left ARITH_EQ ARITH_NE
-%left ARITH_LT ARITH_GT ARITH_GE ARITH_LE
-%left ARITH_LSHIFT ARITH_RSHIFT
-%left ARITH_ADD ARITH_SUB
-%left ARITH_MUL ARITH_DIV ARITH_REM
-%left ARITH_UNARYMINUS ARITH_UNARYPLUS ARITH_NOT ARITH_BNOT
-%%
-
-exp:	expr {
-			return ($1);
-		}
-	;
-
-
-expr:	ARITH_LPAREN expr ARITH_RPAREN { $$ = $2; }
-	| expr ARITH_OR expr	{ $$ = $1 ? $1 : $3 ? $3 : 0; }
-	| expr ARITH_AND expr	{ $$ = $1 ? ( $3 ? $3 : 0 ) : 0; }
-	| expr ARITH_BOR expr	{ $$ = $1 | $3; }
-	| expr ARITH_BXOR expr	{ $$ = $1 ^ $3; }
-	| expr ARITH_BAND expr	{ $$ = $1 & $3; }
-	| expr ARITH_EQ expr	{ $$ = $1 == $3; }
-	| expr ARITH_GT expr	{ $$ = $1 > $3; }
-	| expr ARITH_GE expr	{ $$ = $1 >= $3; }
-	| expr ARITH_LT expr	{ $$ = $1 < $3; }
-	| expr ARITH_LE expr	{ $$ = $1 <= $3; }
-	| expr ARITH_NE expr	{ $$ = $1 != $3; }
-	| expr ARITH_LSHIFT expr { $$ = $1 << $3; }
-	| expr ARITH_RSHIFT expr { $$ = $1 >> $3; }
-	| expr ARITH_ADD expr	{ $$ = $1 + $3; }
-	| expr ARITH_SUB expr	{ $$ = $1 - $3; }
-	| expr ARITH_MUL expr	{ $$ = $1 * $3; }
-	| expr ARITH_DIV expr	{
-			if ($3 == 0)
-				yyerror("division by zero");
-			$$ = $1 / $3;
-			}
-	| expr ARITH_REM expr   {
-			if ($3 == 0)
-				yyerror("division by zero");
-			$$ = $1 % $3;
-			}
-	| ARITH_NOT expr	{ $$ = !($2); }
-	| ARITH_BNOT expr	{ $$ = ~($2); }
-	| ARITH_SUB expr %prec ARITH_UNARYMINUS { $$ = -($2); }
-	| ARITH_ADD expr %prec ARITH_UNARYPLUS { $$ = $2; }
-	| ARITH_NUM
-	;
-%%
-int
-arith(s)
-	const char *s;
-{
-	long result;
-
-	arith_buf = arith_startbuf = s;
-
-	INTOFF;
-	result = yyparse();
-	arith_lex_reset();	/* reprime lex */
-	INTON;
-
-	return (result);
-}
-
-
-/*
- *  The exp(1) builtin.
- */
-int
-expcmd(argc, argv)
-	int argc;
-	char **argv;
-{
-	const char *p;
-	char *concat;
-	char **ap;
-	long i;
-
-	if (argc > 1) {
-		p = argv[1];
-		if (argc > 2) {
-			/*
-			 * concatenate arguments
-			 */
-			STARTSTACKSTR(concat);
-			ap = argv + 2;
-			for (;;) {
-				while (*p)
-					STPUTC(*p++, concat);
-				if ((p = *ap++) == NULL)
-					break;
-				STPUTC(' ', concat);
-			}
-			STPUTC('\0', concat);
-			p = grabstackstr(concat);
-		}
-	} else
-		p = "";
-
-	i = arith(p);
-
-	out1fmt("%ld\n", i);
-	return (! i);
-}
-
-/*************************/
-#ifdef TEST_ARITH
-#include <stdio.h>
-main(argc, argv)
-	char *argv[];
-{
-	printf("%d\n", exp(argv[1]));
-}
-error(s)
-	char *s;
-{
-	fprintf(stderr, "exp: %s\n", s);
-	exit(1);
-}
-#endif
-
-void
-yyerror(s)
-	const char *s;
-{
-
-//	yyerrok;
-	yyclearin;
-	arith_lex_reset();	/* reprime lex */
-	error("arithmetic expression: %s: \"%s\"", s, arith_startbuf);
-	/* NOTREACHED */
-}
diff --git a/sh/arith_lex.c b/sh/arith_lex.c
deleted file mode 100644
index 9a132dd..0000000
--- a/sh/arith_lex.c
+++ /dev/null
@@ -1,1890 +0,0 @@
-#line 2 "arith_lex.c"
-
-#line 4 "arith_lex.c"
-
-#define  YY_INT_ALIGNED short int
-
-/* A lexical scanner generated by flex */
-
-#define FLEX_SCANNER
-#define YY_FLEX_MAJOR_VERSION 2
-#define YY_FLEX_MINOR_VERSION 5
-#define YY_FLEX_SUBMINOR_VERSION 31
-#if YY_FLEX_SUBMINOR_VERSION > 0
-#define FLEX_BETA
-#endif
-
-/* First, we deal with  platform-specific or compiler-specific issues. */
-
-/* begin standard C headers. */
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
-
-/* end standard C headers. */
-
-/* flex integer type definitions */
-
-#ifndef FLEXINT_H
-#define FLEXINT_H
-
-/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */
-
-#if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
-#include <inttypes.h>
-typedef int8_t flex_int8_t;
-typedef uint8_t flex_uint8_t;
-typedef int16_t flex_int16_t;
-typedef uint16_t flex_uint16_t;
-typedef int32_t flex_int32_t;
-typedef uint32_t flex_uint32_t;
-#else
-typedef signed char flex_int8_t;
-typedef short int flex_int16_t;
-typedef int flex_int32_t;
-typedef unsigned char flex_uint8_t; 
-typedef unsigned short int flex_uint16_t;
-typedef unsigned int flex_uint32_t;
-#endif /* ! C99 */
-
-/* Limits of integral types. */
-#ifndef INT8_MIN
-#define INT8_MIN               (-128)
-#endif
-#ifndef INT16_MIN
-#define INT16_MIN              (-32767-1)
-#endif
-#ifndef INT32_MIN
-#define INT32_MIN              (-2147483647-1)
-#endif
-#ifndef INT8_MAX
-#define INT8_MAX               (127)
-#endif
-#ifndef INT16_MAX
-#define INT16_MAX              (32767)
-#endif
-#ifndef INT32_MAX
-#define INT32_MAX              (2147483647)
-#endif
-#ifndef UINT8_MAX
-#define UINT8_MAX              (255U)
-#endif
-#ifndef UINT16_MAX
-#define UINT16_MAX             (65535U)
-#endif
-#ifndef UINT32_MAX
-#define UINT32_MAX             (4294967295U)
-#endif
-
-#endif /* ! FLEXINT_H */
-
-#ifdef __cplusplus
-
-/* The "const" storage-class-modifier is valid. */
-#define YY_USE_CONST
-
-#else	/* ! __cplusplus */
-
-#if __STDC__
-
-#define YY_USE_CONST
-
-#endif	/* __STDC__ */
-#endif	/* ! __cplusplus */
-
-#ifdef YY_USE_CONST
-#define yyconst const
-#else
-#define yyconst
-#endif
-
-/* Returned upon end-of-file. */
-#define YY_NULL 0
-
-/* Promotes a possibly negative, possibly signed char to an unsigned
- * integer for use as an array index.  If the signed char is negative,
- * we want to instead treat it as an 8-bit unsigned char, hence the
- * double cast.
- */
-#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)
-
-/* Enter a start condition.  This macro really ought to take a parameter,
- * but we do it the disgusting crufty way forced on us by the ()-less
- * definition of BEGIN.
- */
-#define BEGIN (yy_start) = 1 + 2 *
-
-/* Translate the current start state into a value that can be later handed
- * to BEGIN to return to the state.  The YYSTATE alias is for lex
- * compatibility.
- */
-#define YY_START (((yy_start) - 1) / 2)
-#define YYSTATE YY_START
-
-/* Action number for EOF rule of a given start state. */
-#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)
-
-/* Special action meaning "start processing a new file". */
-#define YY_NEW_FILE yyrestart(yyin  )
-
-#define YY_END_OF_BUFFER_CHAR 0
-
-/* Size of default input buffer. */
-#ifndef YY_BUF_SIZE
-#define YY_BUF_SIZE 16384
-#endif
-
-#ifndef YY_TYPEDEF_YY_BUFFER_STATE
-#define YY_TYPEDEF_YY_BUFFER_STATE
-typedef struct yy_buffer_state *YY_BUFFER_STATE;
-#endif
-
-extern int yyleng;
-
-extern FILE *yyin, *yyout;
-
-#define EOB_ACT_CONTINUE_SCAN 0
-#define EOB_ACT_END_OF_FILE 1
-#define EOB_ACT_LAST_MATCH 2
-
-    #define YY_LESS_LINENO(n)
-    
-/* Return all but the first "n" matched characters back to the input stream. */
-#define yyless(n) \
-	do \
-		{ \
-		/* Undo effects of setting up yytext. */ \
-        int yyless_macro_arg = (n); \
-        YY_LESS_LINENO(yyless_macro_arg);\
-		*yy_cp = (yy_hold_char); \
-		YY_RESTORE_YY_MORE_OFFSET \
-		(yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
-		YY_DO_BEFORE_ACTION; /* set up yytext again */ \
-		} \
-	while ( 0 )
-
-#define unput(c) yyunput( c, (yytext_ptr)  )
-
-/* The following is because we cannot portably get our hands on size_t
- * (without autoconf's help, which isn't available because we want
- * flex-generated scanners to compile on their own).
- */
-
-#ifndef YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-typedef unsigned int yy_size_t;
-#endif
-
-#ifndef YY_STRUCT_YY_BUFFER_STATE
-#define YY_STRUCT_YY_BUFFER_STATE
-struct yy_buffer_state
-	{
-	FILE *yy_input_file;
-
-	char *yy_ch_buf;		/* input buffer */
-	char *yy_buf_pos;		/* current position in input buffer */
-
-	/* Size of input buffer in bytes, not including room for EOB
-	 * characters.
-	 */
-	yy_size_t yy_buf_size;
-
-	/* Number of characters read into yy_ch_buf, not including EOB
-	 * characters.
-	 */
-	int yy_n_chars;
-
-	/* Whether we "own" the buffer - i.e., we know we created it,
-	 * and can realloc() it to grow it, and should free() it to
-	 * delete it.
-	 */
-	int yy_is_our_buffer;
-
-	/* Whether this is an "interactive" input source; if so, and
-	 * if we're using stdio for input, then we want to use getc()
-	 * instead of fread(), to make sure we stop fetching input after
-	 * each newline.
-	 */
-	int yy_is_interactive;
-
-	/* Whether we're considered to be at the beginning of a line.
-	 * If so, '^' rules will be active on the next match, otherwise
-	 * not.
-	 */
-	int yy_at_bol;
-
-    int yy_bs_lineno; /**< The line count. */
-    int yy_bs_column; /**< The column count. */
-    
-	/* Whether to try to fill the input buffer when we reach the
-	 * end of it.
-	 */
-	int yy_fill_buffer;
-
-	int yy_buffer_status;
-
-#define YY_BUFFER_NEW 0
-#define YY_BUFFER_NORMAL 1
-	/* When an EOF's been seen but there's still some text to process
-	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
-	 * shouldn't try reading from the input source any more.  We might
-	 * still have a bunch of tokens to match, though, because of
-	 * possible backing-up.
-	 *
-	 * When we actually see the EOF, we change the status to "new"
-	 * (via yyrestart()), so that the user can continue scanning by
-	 * just pointing yyin at a new input file.
-	 */
-#define YY_BUFFER_EOF_PENDING 2
-
-	};
-#endif /* !YY_STRUCT_YY_BUFFER_STATE */
-
-/* Stack of input buffers. */
-static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
-static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
-static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */
-
-/* We provide macros for accessing buffer states in case in the
- * future we want to put the buffer states in a more general
- * "scanner state".
- *
- * Returns the top of the stack, or NULL.
- */
-#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
-                          ? (yy_buffer_stack)[(yy_buffer_stack_top)] \
-                          : NULL)
-
-/* Same as previous macro, but useful when we know that the buffer stack is not
- * NULL or when we need an lvalue. For internal use only.
- */
-#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
-
-/* yy_hold_char holds the character lost when yytext is formed. */
-static char yy_hold_char;
-static int yy_n_chars;		/* number of characters read into yy_ch_buf */
-int yyleng;
-
-/* Points to current character in buffer. */
-static char *yy_c_buf_p = (char *) 0;
-static int yy_init = 1;		/* whether we need to initialize */
-static int yy_start = 0;	/* start state number */
-
-/* Flag which is used to allow yywrap()'s to do buffer switches
- * instead of setting up a fresh yyin.  A bit of a hack ...
- */
-static int yy_did_buffer_switch_on_eof;
-
-void yyrestart (FILE *input_file  );
-void yy_switch_to_buffer (YY_BUFFER_STATE new_buffer  );
-YY_BUFFER_STATE yy_create_buffer (FILE *file,int size  );
-void yy_delete_buffer (YY_BUFFER_STATE b  );
-void yy_flush_buffer (YY_BUFFER_STATE b  );
-void yypush_buffer_state (YY_BUFFER_STATE new_buffer  );
-void yypop_buffer_state (void );
-
-static void yyensure_buffer_stack (void );
-static void yy_load_buffer_state (void );
-static void yy_init_buffer (YY_BUFFER_STATE b,FILE *file  );
-
-#define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER )
-
-YY_BUFFER_STATE yy_scan_buffer (char *base,yy_size_t size  );
-YY_BUFFER_STATE yy_scan_string (yyconst char *yy_str  );
-YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,int len  );
-
-void *yyalloc (yy_size_t  );
-void *yyrealloc (void *,yy_size_t  );
-void yyfree (void *  );
-
-#define yy_new_buffer yy_create_buffer
-
-#define yy_set_interactive(is_interactive) \
-	{ \
-	if ( ! YY_CURRENT_BUFFER ){ \
-        yyensure_buffer_stack (); \
-		YY_CURRENT_BUFFER_LVALUE =    \
-            yy_create_buffer(yyin,YY_BUF_SIZE ); \
-	} \
-	YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
-	}
-
-#define yy_set_bol(at_bol) \
-	{ \
-	if ( ! YY_CURRENT_BUFFER ){\
-        yyensure_buffer_stack (); \
-		YY_CURRENT_BUFFER_LVALUE =    \
-            yy_create_buffer(yyin,YY_BUF_SIZE ); \
-	} \
-	YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
-	}
-
-#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)
-
-/* Begin user sect3 */
-
-#define yywrap(n) 1
-#define YY_SKIP_YYWRAP
-
-typedef unsigned char YY_CHAR;
-
-FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
-
-typedef int yy_state_type;
-
-extern int yylineno;
-
-int yylineno = 1;
-
-extern char *yytext;
-#define yytext_ptr yytext
-
-static yy_state_type yy_get_previous_state (void );
-static yy_state_type yy_try_NUL_trans (yy_state_type current_state  );
-static int yy_get_next_buffer (void );
-static void yy_fatal_error (yyconst char msg[]  );
-
-/* Done after the current pattern has been matched and before the
- * corresponding action - sets up yytext.
- */
-#define YY_DO_BEFORE_ACTION \
-	(yytext_ptr) = yy_bp; \
-	yyleng = (size_t) (yy_cp - yy_bp); \
-	(yy_hold_char) = *yy_cp; \
-	*yy_cp = '\0'; \
-	(yy_c_buf_p) = yy_cp;
-
-#define YY_NUM_RULES 29
-#define YY_END_OF_BUFFER 30
-/* This struct is not used in this scanner,
-   but its presence is necessary. */
-struct yy_trans_info
-	{
-	flex_int32_t yy_verify;
-	flex_int32_t yy_nxt;
-	};
-static yyconst flex_int16_t yy_accept[39] =
-    {   0,
-        0,    0,   30,   28,    1,    1,   27,   23,   12,    6,
-        7,   21,   24,   25,   22,    3,    4,   17,   28,   15,
-        5,   11,   10,   26,   14,    9,    3,    0,    4,   19,
-       18,   13,   16,   20,    5,    8,    2,    0
-    } ;
-
-static yyconst flex_int32_t yy_ec[256] =
-    {   0,
-        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    2,    4,    1,    1,    1,    5,    6,    1,    7,
-        8,    9,   10,    1,   11,    1,   12,   13,   14,   14,
-       14,   14,   14,   14,   14,   15,   15,    1,    1,   16,
-       17,   18,    1,    1,   19,   19,   19,   19,   19,   19,
-       20,   20,   20,   20,   20,   20,   20,   20,   20,   20,
-       20,   20,   20,   20,   20,   20,   20,   20,   20,   20,
-        1,    1,    1,   21,   20,    1,   19,   19,   19,   19,
-
-       19,   19,   20,   20,   20,   20,   20,   20,   20,   20,
-       20,   20,   20,   20,   20,   20,   20,   20,   20,   22,
-       20,   20,    1,   23,    1,   24,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1
-    } ;
-
-static yyconst flex_int32_t yy_meta[25] =
-    {   0,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    2,    2,    2,    1,    1,    1,    2,    3,
-        1,    3,    1,    1
-    } ;
-
-static yyconst flex_int16_t yy_base[41] =
-    {   0,
-        0,    0,   47,   48,   48,   48,   29,   48,   39,   48,
-       48,   48,   48,   48,   48,   12,   14,   14,   27,   15,
-        0,   48,   20,   48,   48,   48,   22,    0,   24,   48,
-       48,   48,   48,   48,    0,   48,    0,   48,   38,   40
-    } ;
-
-static yyconst flex_int16_t yy_def[41] =
-    {   0,
-       38,    1,   38,   38,   38,   38,   38,   38,   38,   38,
-       38,   38,   38,   38,   38,   38,   38,   38,   38,   38,
-       39,   38,   38,   38,   38,   38,   38,   40,   38,   38,
-       38,   38,   38,   38,   39,   38,   40,    0,   38,   38
-    } ;
-
-static yyconst flex_int16_t yy_nxt[73] =
-    {   0,
-        4,    5,    6,    7,    8,    9,   10,   11,   12,   13,
-       14,   15,   16,   17,   17,   18,   19,   20,   21,   21,
-       22,   21,   23,   24,   27,   27,   29,   29,   29,   30,
-       31,   33,   34,   28,   27,   27,   29,   29,   29,   35,
-       35,   37,   36,   32,   26,   25,   38,    3,   38,   38,
-       38,   38,   38,   38,   38,   38,   38,   38,   38,   38,
-       38,   38,   38,   38,   38,   38,   38,   38,   38,   38,
-       38,   38
-    } ;
-
-static yyconst flex_int16_t yy_chk[73] =
-    {   0,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
-        1,    1,    1,    1,   16,   16,   17,   17,   17,   18,
-       18,   20,   20,   16,   27,   27,   29,   29,   29,   39,
-       39,   40,   23,   19,    9,    7,    3,   38,   38,   38,
-       38,   38,   38,   38,   38,   38,   38,   38,   38,   38,
-       38,   38,   38,   38,   38,   38,   38,   38,   38,   38,
-       38,   38
-    } ;
-
-static yy_state_type yy_last_accepting_state;
-static char *yy_last_accepting_cpos;
-
-extern int yy_flex_debug;
-int yy_flex_debug = 0;
-
-/* The intent behind this definition is that it'll catch
- * any uses of REJECT which flex missed.
- */
-#define REJECT reject_used_but_not_detected
-#define yymore() yymore_used_but_not_detected
-#define YY_MORE_ADJ 0
-#define YY_RESTORE_YY_MORE_OFFSET
-char *yytext;
-#line 1 "arith_lex.l"
-#line 2 "arith_lex.l"
-/*	$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)arith_lex.l	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $");
-#endif
-#endif /* not lint */
-
-#include <unistd.h>
-#include "arith.h"
-#include "error.h"
-#include "expand.h"
-#include "var.h"
-
-extern int yylval;
-extern char *arith_buf, *arith_startbuf;
-#undef YY_INPUT
-#define YY_INPUT(buf,result,max) \
-	result = (*buf = *arith_buf++) ? 1 : YY_NULL;
-#define YY_NO_UNPUT
-#line 526 "arith_lex.c"
-
-#define INITIAL 0
-
-#ifndef YY_NO_UNISTD_H
-/* Special case for "unistd.h", since it is non-ANSI. We include it way
- * down here because we want the user's section 1 to have been scanned first.
- * The user has a chance to override it with an option.
- */
-#include <unistd.h>
-#endif
-
-#ifndef YY_EXTRA_TYPE
-#define YY_EXTRA_TYPE void *
-#endif
-
-/* Macros after this point can all be overridden by user definitions in
- * section 1.
- */
-
-#ifndef YY_SKIP_YYWRAP
-#ifdef __cplusplus
-extern "C" int yywrap (void );
-#else
-extern int yywrap (void );
-#endif
-#endif
-
-    static void yyunput (int c,char *buf_ptr  );
-    
-#ifndef yytext_ptr
-static void yy_flex_strncpy (char *,yyconst char *,int );
-#endif
-
-#ifdef YY_NEED_STRLEN
-static int yy_flex_strlen (yyconst char * );
-#endif
-
-#ifndef YY_NO_INPUT
-
-#ifdef __cplusplus
-static int yyinput (void );
-#else
-static int input (void );
-#endif
-
-#endif
-
-/* Amount of stuff to slurp up with each read. */
-#ifndef YY_READ_BUF_SIZE
-#define YY_READ_BUF_SIZE 8192
-#endif
-
-/* Copy whatever the last rule matched to the standard output. */
-#ifndef ECHO
-/* This used to be an fputs(), but since the string might contain NUL's,
- * we now use fwrite().
- */
-#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
-#endif
-
-/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
- * is returned in "result".
- */
-#ifndef YY_INPUT
-#define YY_INPUT(buf,result,max_size) \
-	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
-		{ \
-		int c = '*'; \
-		size_t n; \
-		for ( n = 0; n < max_size && \
-			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
-			buf[n] = (char) c; \
-		if ( c == '\n' ) \
-			buf[n++] = (char) c; \
-		if ( c == EOF && ferror( yyin ) ) \
-			YY_FATAL_ERROR( "input in flex scanner failed" ); \
-		result = n; \
-		} \
-	else \
-		{ \
-		errno=0; \
-		while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
-			{ \
-			if( errno != EINTR) \
-				{ \
-				YY_FATAL_ERROR( "input in flex scanner failed" ); \
-				break; \
-				} \
-			errno=0; \
-			clearerr(yyin); \
-			} \
-		}\
-\
-
-#endif
-
-/* No semi-colon after return; correct usage is to write "yyterminate();" -
- * we don't want an extra ';' after the "return" because that will cause
- * some compilers to complain about unreachable statements.
- */
-#ifndef yyterminate
-#define yyterminate() return YY_NULL
-#endif
-
-/* Number of entries by which start-condition stack grows. */
-#ifndef YY_START_STACK_INCR
-#define YY_START_STACK_INCR 25
-#endif
-
-/* Report a fatal error. */
-#ifndef YY_FATAL_ERROR
-#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
-#endif
-
-/* end tables serialization structures and prototypes */
-
-/* Default declaration of generated scanner - a define so the user can
- * easily add parameters.
- */
-#ifndef YY_DECL
-#define YY_DECL_IS_OURS 1
-
-extern int yylex (void);
-
-#define YY_DECL int yylex (void)
-#endif /* !YY_DECL */
-
-/* Code executed at the beginning of each rule, after yytext and yyleng
- * have been set up.
- */
-#ifndef YY_USER_ACTION
-#define YY_USER_ACTION
-#endif
-
-/* Code executed at the end of each rule. */
-#ifndef YY_BREAK
-#define YY_BREAK break;
-#endif
-
-#define YY_RULE_SETUP \
-	YY_USER_ACTION
-
-/** The main scanner function which does all the work.
- */
-YY_DECL
-{
-	register yy_state_type yy_current_state;
-	register char *yy_cp, *yy_bp;
-	register int yy_act;
-    
-#line 60 "arith_lex.l"
-
-#line 679 "arith_lex.c"
-
-	if ( (yy_init) )
-		{
-		(yy_init) = 0;
-
-#ifdef YY_USER_INIT
-		YY_USER_INIT;
-#endif
-
-		if ( ! (yy_start) )
-			(yy_start) = 1;	/* first start state */
-
-		if ( ! yyin )
-			yyin = stdin;
-
-		if ( ! yyout )
-			yyout = stdout;
-
-		if ( ! YY_CURRENT_BUFFER ) {
-			yyensure_buffer_stack ();
-			YY_CURRENT_BUFFER_LVALUE =
-				yy_create_buffer(yyin,YY_BUF_SIZE );
-		}
-
-		yy_load_buffer_state( );
-		}
-
-	while ( 1 )		/* loops until end-of-file is reached */
-		{
-		yy_cp = (yy_c_buf_p);
-
-		/* Support of yytext. */
-		*yy_cp = (yy_hold_char);
-
-		/* yy_bp points to the position in yy_ch_buf of the start of
-		 * the current run.
-		 */
-		yy_bp = yy_cp;
-
-		yy_current_state = (yy_start);
-yy_match:
-		do
-			{
-			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
-			if ( yy_accept[yy_current_state] )
-				{
-				(yy_last_accepting_state) = yy_current_state;
-				(yy_last_accepting_cpos) = yy_cp;
-				}
-			while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
-				{
-				yy_current_state = (int) yy_def[yy_current_state];
-				if ( yy_current_state >= 39 )
-					yy_c = yy_meta[(unsigned int) yy_c];
-				}
-			yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
-			++yy_cp;
-			}
-		while ( yy_base[yy_current_state] != 48 );
-
-yy_find_action:
-		yy_act = yy_accept[yy_current_state];
-		if ( yy_act == 0 )
-			{ /* have to back up */
-			yy_cp = (yy_last_accepting_cpos);
-			yy_current_state = (yy_last_accepting_state);
-			yy_act = yy_accept[yy_current_state];
-			}
-
-		YY_DO_BEFORE_ACTION;
-
-do_action:	/* This label is used only to access EOF actions. */
-
-		switch ( yy_act )
-	{ /* beginning of action switch */
-			case 0: /* must back up */
-			/* undo the effects of YY_DO_BEFORE_ACTION */
-			*yy_cp = (yy_hold_char);
-			yy_cp = (yy_last_accepting_cpos);
-			yy_current_state = (yy_last_accepting_state);
-			goto yy_find_action;
-
-case 1:
-/* rule 1 can match eol */
-YY_RULE_SETUP
-#line 61 "arith_lex.l"
-{ ; }
-	YY_BREAK
-case 2:
-YY_RULE_SETUP
-#line 62 "arith_lex.l"
-{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-	YY_BREAK
-case 3:
-YY_RULE_SETUP
-#line 63 "arith_lex.l"
-{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-	YY_BREAK
-case 4:
-YY_RULE_SETUP
-#line 64 "arith_lex.l"
-{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-	YY_BREAK
-case 5:
-YY_RULE_SETUP
-#line 65 "arith_lex.l"
-{ char *v = lookupvar(yytext);
-			if (v) {
-				yylval = strtol(v, &v, 0);
-				if (*v == 0)
-					return ARITH_NUM;
-			}
-			error("arith: syntax error: \"%s\"", arith_startbuf);
-		}
-	YY_BREAK
-case 6:
-YY_RULE_SETUP
-#line 73 "arith_lex.l"
-{ return(ARITH_LPAREN); }
-	YY_BREAK
-case 7:
-YY_RULE_SETUP
-#line 74 "arith_lex.l"
-{ return(ARITH_RPAREN); }
-	YY_BREAK
-case 8:
-YY_RULE_SETUP
-#line 75 "arith_lex.l"
-{ return(ARITH_OR); }
-	YY_BREAK
-case 9:
-YY_RULE_SETUP
-#line 76 "arith_lex.l"
-{ return(ARITH_AND); }
-	YY_BREAK
-case 10:
-YY_RULE_SETUP
-#line 77 "arith_lex.l"
-{ return(ARITH_BOR); }
-	YY_BREAK
-case 11:
-YY_RULE_SETUP
-#line 78 "arith_lex.l"
-{ return(ARITH_BXOR); }
-	YY_BREAK
-case 12:
-YY_RULE_SETUP
-#line 79 "arith_lex.l"
-{ return(ARITH_BAND); }
-	YY_BREAK
-case 13:
-YY_RULE_SETUP
-#line 80 "arith_lex.l"
-{ return(ARITH_EQ); }
-	YY_BREAK
-case 14:
-YY_RULE_SETUP
-#line 81 "arith_lex.l"
-{ return(ARITH_NE); }
-	YY_BREAK
-case 15:
-YY_RULE_SETUP
-#line 82 "arith_lex.l"
-{ return(ARITH_GT); }
-	YY_BREAK
-case 16:
-YY_RULE_SETUP
-#line 83 "arith_lex.l"
-{ return(ARITH_GE); }
-	YY_BREAK
-case 17:
-YY_RULE_SETUP
-#line 84 "arith_lex.l"
-{ return(ARITH_LT); }
-	YY_BREAK
-case 18:
-YY_RULE_SETUP
-#line 85 "arith_lex.l"
-{ return(ARITH_LE); }
-	YY_BREAK
-case 19:
-YY_RULE_SETUP
-#line 86 "arith_lex.l"
-{ return(ARITH_LSHIFT); }
-	YY_BREAK
-case 20:
-YY_RULE_SETUP
-#line 87 "arith_lex.l"
-{ return(ARITH_RSHIFT); }
-	YY_BREAK
-case 21:
-YY_RULE_SETUP
-#line 88 "arith_lex.l"
-{ return(ARITH_MUL); }
-	YY_BREAK
-case 22:
-YY_RULE_SETUP
-#line 89 "arith_lex.l"
-{ return(ARITH_DIV); }
-	YY_BREAK
-case 23:
-YY_RULE_SETUP
-#line 90 "arith_lex.l"
-{ return(ARITH_REM); }
-	YY_BREAK
-case 24:
-YY_RULE_SETUP
-#line 91 "arith_lex.l"
-{ return(ARITH_ADD); }
-	YY_BREAK
-case 25:
-YY_RULE_SETUP
-#line 92 "arith_lex.l"
-{ return(ARITH_SUB); }
-	YY_BREAK
-case 26:
-YY_RULE_SETUP
-#line 93 "arith_lex.l"
-{ return(ARITH_BNOT); }
-	YY_BREAK
-case 27:
-YY_RULE_SETUP
-#line 94 "arith_lex.l"
-{ return(ARITH_NOT); }
-	YY_BREAK
-case 28:
-YY_RULE_SETUP
-#line 95 "arith_lex.l"
-{ error("arith: syntax error: \"%s\"", arith_startbuf); }
-	YY_BREAK
-case 29:
-YY_RULE_SETUP
-#line 96 "arith_lex.l"
-ECHO;
-	YY_BREAK
-#line 915 "arith_lex.c"
-case YY_STATE_EOF(INITIAL):
-	yyterminate();
-
-	case YY_END_OF_BUFFER:
-		{
-		/* Amount of text matched not including the EOB char. */
-		int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 1;
-
-		/* Undo the effects of YY_DO_BEFORE_ACTION. */
-		*yy_cp = (yy_hold_char);
-		YY_RESTORE_YY_MORE_OFFSET
-
-		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
-			{
-			/* We're scanning a new file or input source.  It's
-			 * possible that this happened because the user
-			 * just pointed yyin at a new source and called
-			 * yylex().  If so, then we have to assure
-			 * consistency between YY_CURRENT_BUFFER and our
-			 * globals.  Here is the right place to do so, because
-			 * this is the first action (other than possibly a
-			 * back-up) that will match for the new input source.
-			 */
-			(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
-			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
-			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
-			}
-
-		/* Note that here we test for yy_c_buf_p "<=" to the position
-		 * of the first EOB in the buffer, since yy_c_buf_p will
-		 * already have been incremented past the NUL character
-		 * (since all states make transitions on EOB to the
-		 * end-of-buffer state).  Contrast this with the test
-		 * in input().
-		 */
-		if ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
-			{ /* This was really a NUL. */
-			yy_state_type yy_next_state;
-
-			(yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text;
-
-			yy_current_state = yy_get_previous_state(  );
-
-			/* Okay, we're now positioned to make the NUL
-			 * transition.  We couldn't have
-			 * yy_get_previous_state() go ahead and do it
-			 * for us because it doesn't know how to deal
-			 * with the possibility of jamming (and we don't
-			 * want to build jamming into it because then it
-			 * will run more slowly).
-			 */
-
-			yy_next_state = yy_try_NUL_trans( yy_current_state );
-
-			yy_bp = (yytext_ptr) + YY_MORE_ADJ;
-
-			if ( yy_next_state )
-				{
-				/* Consume the NUL. */
-				yy_cp = ++(yy_c_buf_p);
-				yy_current_state = yy_next_state;
-				goto yy_match;
-				}
-
-			else
-				{
-				yy_cp = (yy_c_buf_p);
-				goto yy_find_action;
-				}
-			}
-
-		else switch ( yy_get_next_buffer(  ) )
-			{
-			case EOB_ACT_END_OF_FILE:
-				{
-				(yy_did_buffer_switch_on_eof) = 0;
-
-				if ( yywrap( ) )
-					{
-					/* Note: because we've taken care in
-					 * yy_get_next_buffer() to have set up
-					 * yytext, we can now set up
-					 * yy_c_buf_p so that if some total
-					 * hoser (like flex itself) wants to
-					 * call the scanner after we return the
-					 * YY_NULL, it'll still work - another
-					 * YY_NULL will get returned.
-					 */
-					(yy_c_buf_p) = (yytext_ptr) + YY_MORE_ADJ;
-
-					yy_act = YY_STATE_EOF(YY_START);
-					goto do_action;
-					}
-
-				else
-					{
-					if ( ! (yy_did_buffer_switch_on_eof) )
-						YY_NEW_FILE;
-					}
-				break;
-				}
-
-			case EOB_ACT_CONTINUE_SCAN:
-				(yy_c_buf_p) =
-					(yytext_ptr) + yy_amount_of_matched_text;
-
-				yy_current_state = yy_get_previous_state(  );
-
-				yy_cp = (yy_c_buf_p);
-				yy_bp = (yytext_ptr) + YY_MORE_ADJ;
-				goto yy_match;
-
-			case EOB_ACT_LAST_MATCH:
-				(yy_c_buf_p) =
-				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)];
-
-				yy_current_state = yy_get_previous_state(  );
-
-				yy_cp = (yy_c_buf_p);
-				yy_bp = (yytext_ptr) + YY_MORE_ADJ;
-				goto yy_find_action;
-			}
-		break;
-		}
-
-	default:
-		YY_FATAL_ERROR(
-			"fatal flex scanner internal error--no action found" );
-	} /* end of action switch */
-		} /* end of scanning one token */
-} /* end of yylex */
-
-/* yy_get_next_buffer - try to read in a new buffer
- *
- * Returns a code representing an action:
- *	EOB_ACT_LAST_MATCH -
- *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
- *	EOB_ACT_END_OF_FILE - end of file
- */
-static int yy_get_next_buffer (void)
-{
-    	register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
-	register char *source = (yytext_ptr);
-	register int number_to_move, i;
-	int ret_val;
-
-	if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] )
-		YY_FATAL_ERROR(
-		"fatal flex scanner internal error--end of buffer missed" );
-
-	if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
-		{ /* Don't try to fill the buffer, so this is an EOF. */
-		if ( (yy_c_buf_p) - (yytext_ptr) - YY_MORE_ADJ == 1 )
-			{
-			/* We matched a single character, the EOB, so
-			 * treat this as a final EOF.
-			 */
-			return EOB_ACT_END_OF_FILE;
-			}
-
-		else
-			{
-			/* We matched some text prior to the EOB, first
-			 * process it.
-			 */
-			return EOB_ACT_LAST_MATCH;
-			}
-		}
-
-	/* Try to read more data. */
-
-	/* First move last chars to start of buffer. */
-	number_to_move = (int) ((yy_c_buf_p) - (yytext_ptr)) - 1;
-
-	for ( i = 0; i < number_to_move; ++i )
-		*(dest++) = *(source++);
-
-	if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
-		/* don't do the read, it's not guaranteed to return an EOF,
-		 * just force an EOF
-		 */
-		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars) = 0;
-
-	else
-		{
-			size_t num_to_read =
-			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;
-
-		while ( num_to_read <= 0 )
-			{ /* Not enough room in the buffer - grow it. */
-
-			/* just a shorter name for the current buffer */
-			YY_BUFFER_STATE b = YY_CURRENT_BUFFER;
-
-			int yy_c_buf_p_offset =
-				(int) ((yy_c_buf_p) - b->yy_ch_buf);
-
-			if ( b->yy_is_our_buffer )
-				{
-				int new_size = b->yy_buf_size * 2;
-
-				if ( new_size <= 0 )
-					b->yy_buf_size += b->yy_buf_size / 8;
-				else
-					b->yy_buf_size *= 2;
-
-				b->yy_ch_buf = (char *)
-					/* Include room in for 2 EOB chars. */
-					yyrealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2  );
-				}
-			else
-				/* Can't grow it, we don't own it. */
-				b->yy_ch_buf = 0;
-
-			if ( ! b->yy_ch_buf )
-				YY_FATAL_ERROR(
-				"fatal error - scanner input buffer overflow" );
-
-			(yy_c_buf_p) = &b->yy_ch_buf[yy_c_buf_p_offset];
-
-			num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
-						number_to_move - 1;
-
-			}
-
-		if ( num_to_read > YY_READ_BUF_SIZE )
-			num_to_read = YY_READ_BUF_SIZE;
-
-		/* Read in more data. */
-		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
-			(yy_n_chars), num_to_read );
-
-		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
-		}
-
-	if ( (yy_n_chars) == 0 )
-		{
-		if ( number_to_move == YY_MORE_ADJ )
-			{
-			ret_val = EOB_ACT_END_OF_FILE;
-			yyrestart(yyin  );
-			}
-
-		else
-			{
-			ret_val = EOB_ACT_LAST_MATCH;
-			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
-				YY_BUFFER_EOF_PENDING;
-			}
-		}
-
-	else
-		ret_val = EOB_ACT_CONTINUE_SCAN;
-
-	(yy_n_chars) += number_to_move;
-	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] = YY_END_OF_BUFFER_CHAR;
-	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] = YY_END_OF_BUFFER_CHAR;
-
-	(yytext_ptr) = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];
-
-	return ret_val;
-}
-
-/* yy_get_previous_state - get the state just before the EOB char was reached */
-
-    static yy_state_type yy_get_previous_state (void)
-{
-	register yy_state_type yy_current_state;
-	register char *yy_cp;
-    
-	yy_current_state = (yy_start);
-
-	for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp )
-		{
-		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
-		if ( yy_accept[yy_current_state] )
-			{
-			(yy_last_accepting_state) = yy_current_state;
-			(yy_last_accepting_cpos) = yy_cp;
-			}
-		while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
-			{
-			yy_current_state = (int) yy_def[yy_current_state];
-			if ( yy_current_state >= 39 )
-				yy_c = yy_meta[(unsigned int) yy_c];
-			}
-		yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
-		}
-
-	return yy_current_state;
-}
-
-/* yy_try_NUL_trans - try to make a transition on the NUL character
- *
- * synopsis
- *	next_state = yy_try_NUL_trans( current_state );
- */
-    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state )
-{
-	register int yy_is_jam;
-    	register char *yy_cp = (yy_c_buf_p);
-
-	register YY_CHAR yy_c = 1;
-	if ( yy_accept[yy_current_state] )
-		{
-		(yy_last_accepting_state) = yy_current_state;
-		(yy_last_accepting_cpos) = yy_cp;
-		}
-	while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
-		{
-		yy_current_state = (int) yy_def[yy_current_state];
-		if ( yy_current_state >= 39 )
-			yy_c = yy_meta[(unsigned int) yy_c];
-		}
-	yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
-	yy_is_jam = (yy_current_state == 38);
-
-	return yy_is_jam ? 0 : yy_current_state;
-}
-
-    static void yyunput (int c, register char * yy_bp )
-{
-	register char *yy_cp;
-    
-    yy_cp = (yy_c_buf_p);
-
-	/* undo effects of setting up yytext */
-	*yy_cp = (yy_hold_char);
-
-	if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
-		{ /* need to shift things up to make room */
-		/* +2 for EOB chars. */
-		register int number_to_move = (yy_n_chars) + 2;
-		register char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[
-					YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 2];
-		register char *source =
-				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move];
-
-		while ( source > YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
-			*--dest = *--source;
-
-		yy_cp += (int) (dest - source);
-		yy_bp += (int) (dest - source);
-		YY_CURRENT_BUFFER_LVALUE->yy_n_chars =
-			(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_buf_size;
-
-		if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
-			YY_FATAL_ERROR( "flex scanner push-back overflow" );
-		}
-
-	*--yy_cp = (char) c;
-
-	(yytext_ptr) = yy_bp;
-	(yy_hold_char) = *yy_cp;
-	(yy_c_buf_p) = yy_cp;
-}
-
-#ifndef YY_NO_INPUT
-#ifdef __cplusplus
-    static int yyinput (void)
-#else
-    static int input  (void)
-#endif
-
-{
-	int c;
-    
-	*(yy_c_buf_p) = (yy_hold_char);
-
-	if ( *(yy_c_buf_p) == YY_END_OF_BUFFER_CHAR )
-		{
-		/* yy_c_buf_p now points to the character we want to return.
-		 * If this occurs *before* the EOB characters, then it's a
-		 * valid NUL; if not, then we've hit the end of the buffer.
-		 */
-		if ( (yy_c_buf_p) < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
-			/* This was really a NUL. */
-			*(yy_c_buf_p) = '\0';
-
-		else
-			{ /* need more input */
-			int offset = (yy_c_buf_p) - (yytext_ptr);
-			++(yy_c_buf_p);
-
-			switch ( yy_get_next_buffer(  ) )
-				{
-				case EOB_ACT_LAST_MATCH:
-					/* This happens because yy_g_n_b()
-					 * sees that we've accumulated a
-					 * token and flags that we need to
-					 * try matching the token before
-					 * proceeding.  But for input(),
-					 * there's no matching to consider.
-					 * So convert the EOB_ACT_LAST_MATCH
-					 * to EOB_ACT_END_OF_FILE.
-					 */
-
-					/* Reset buffer status. */
-					yyrestart(yyin );
-
-					/*FALLTHROUGH*/
-
-				case EOB_ACT_END_OF_FILE:
-					{
-					if ( yywrap( ) )
-						return EOF;
-
-					if ( ! (yy_did_buffer_switch_on_eof) )
-						YY_NEW_FILE;
-#ifdef __cplusplus
-					return yyinput();
-#else
-					return input();
-#endif
-					}
-
-				case EOB_ACT_CONTINUE_SCAN:
-					(yy_c_buf_p) = (yytext_ptr) + offset;
-					break;
-				}
-			}
-		}
-
-	c = *(unsigned char *) (yy_c_buf_p);	/* cast for 8-bit char's */
-	*(yy_c_buf_p) = '\0';	/* preserve yytext */
-	(yy_hold_char) = *++(yy_c_buf_p);
-
-	return c;
-}
-#endif	/* ifndef YY_NO_INPUT */
-
-/** Immediately switch to a different input stream.
- * @param input_file A readable stream.
- * 
- * @note This function does not reset the start condition to @c INITIAL .
- */
-    void yyrestart  (FILE * input_file )
-{
-    
-	if ( ! YY_CURRENT_BUFFER ){
-        yyensure_buffer_stack ();
-		YY_CURRENT_BUFFER_LVALUE =
-            yy_create_buffer(yyin,YY_BUF_SIZE );
-	}
-
-	yy_init_buffer(YY_CURRENT_BUFFER,input_file );
-	yy_load_buffer_state( );
-}
-
-/** Switch to a different input buffer.
- * @param new_buffer The new input buffer.
- * 
- */
-    void yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer )
-{
-    
-	/* TODO. We should be able to replace this entire function body
-	 * with
-	 *		yypop_buffer_state();
-	 *		yypush_buffer_state(new_buffer);
-     */
-	yyensure_buffer_stack ();
-	if ( YY_CURRENT_BUFFER == new_buffer )
-		return;
-
-	if ( YY_CURRENT_BUFFER )
-		{
-		/* Flush out information for old buffer. */
-		*(yy_c_buf_p) = (yy_hold_char);
-		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
-		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
-		}
-
-	YY_CURRENT_BUFFER_LVALUE = new_buffer;
-	yy_load_buffer_state( );
-
-	/* We don't actually know whether we did this switch during
-	 * EOF (yywrap()) processing, but the only time this flag
-	 * is looked at is after yywrap() is called, so it's safe
-	 * to go ahead and always set it.
-	 */
-	(yy_did_buffer_switch_on_eof) = 1;
-}
-
-static void yy_load_buffer_state  (void)
-{
-    	(yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
-	(yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
-	yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
-	(yy_hold_char) = *(yy_c_buf_p);
-}
-
-/** Allocate and initialize an input buffer state.
- * @param file A readable stream.
- * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
- * 
- * @return the allocated buffer state.
- */
-    YY_BUFFER_STATE yy_create_buffer  (FILE * file, int  size )
-{
-	YY_BUFFER_STATE b;
-    
-	b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state )  );
-	if ( ! b )
-		YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
-
-	b->yy_buf_size = size;
-
-	/* yy_ch_buf has to be 2 characters longer than the size given because
-	 * we need to put in 2 end-of-buffer characters.
-	 */
-	b->yy_ch_buf = (char *) yyalloc(b->yy_buf_size + 2  );
-	if ( ! b->yy_ch_buf )
-		YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );
-
-	b->yy_is_our_buffer = 1;
-
-	yy_init_buffer(b,file );
-
-	return b;
-}
-
-/** Destroy the buffer.
- * @param b a buffer created with yy_create_buffer()
- * 
- */
-    void yy_delete_buffer (YY_BUFFER_STATE  b )
-{
-    
-	if ( ! b )
-		return;
-
-	if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
-		YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;
-
-	if ( b->yy_is_our_buffer )
-		yyfree((void *) b->yy_ch_buf  );
-
-	yyfree((void *) b  );
-}
-
-#ifndef __cplusplus
-extern int isatty (int );
-#endif /* __cplusplus */
-    
-/* Initializes or reinitializes a buffer.
- * This function is sometimes called more than once on the same buffer,
- * such as during a yyrestart() or at EOF.
- */
-    static void yy_init_buffer  (YY_BUFFER_STATE  b, FILE * file )
-
-{
-	int oerrno = errno;
-    
-	yy_flush_buffer(b );
-
-	b->yy_input_file = file;
-	b->yy_fill_buffer = 1;
-
-    /* If b is the current buffer, then yy_init_buffer was _probably_
-     * called from yyrestart() or through yy_get_next_buffer.
-     * In that case, we don't want to reset the lineno or column.
-     */
-    if (b != YY_CURRENT_BUFFER){
-        b->yy_bs_lineno = 1;
-        b->yy_bs_column = 0;
-    }
-
-        b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0;
-    
-	errno = oerrno;
-}
-
-/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
- * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
- * 
- */
-    void yy_flush_buffer (YY_BUFFER_STATE  b )
-{
-    	if ( ! b )
-		return;
-
-	b->yy_n_chars = 0;
-
-	/* We always need two end-of-buffer characters.  The first causes
-	 * a transition to the end-of-buffer state.  The second causes
-	 * a jam in that state.
-	 */
-	b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
-	b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;
-
-	b->yy_buf_pos = &b->yy_ch_buf[0];
-
-	b->yy_at_bol = 1;
-	b->yy_buffer_status = YY_BUFFER_NEW;
-
-	if ( b == YY_CURRENT_BUFFER )
-		yy_load_buffer_state( );
-}
-
-/** Pushes the new state onto the stack. The new state becomes
- *  the current state. This function will allocate the stack
- *  if necessary.
- *  @param new_buffer The new state.
- *  
- */
-void yypush_buffer_state (YY_BUFFER_STATE new_buffer )
-{
-    	if (new_buffer == NULL)
-		return;
-
-	yyensure_buffer_stack();
-
-	/* This block is copied from yy_switch_to_buffer. */
-	if ( YY_CURRENT_BUFFER )
-		{
-		/* Flush out information for old buffer. */
-		*(yy_c_buf_p) = (yy_hold_char);
-		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
-		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
-		}
-
-	/* Only push if top exists. Otherwise, replace top. */
-	if (YY_CURRENT_BUFFER)
-		(yy_buffer_stack_top)++;
-	YY_CURRENT_BUFFER_LVALUE = new_buffer;
-
-	/* copied from yy_switch_to_buffer. */
-	yy_load_buffer_state( );
-	(yy_did_buffer_switch_on_eof) = 1;
-}
-
-/** Removes and deletes the top of the stack, if present.
- *  The next element becomes the new top.
- *  
- */
-void yypop_buffer_state (void)
-{
-    	if (!YY_CURRENT_BUFFER)
-		return;
-
-	yy_delete_buffer(YY_CURRENT_BUFFER );
-	YY_CURRENT_BUFFER_LVALUE = NULL;
-	if ((yy_buffer_stack_top) > 0)
-		--(yy_buffer_stack_top);
-
-	if (YY_CURRENT_BUFFER) {
-		yy_load_buffer_state( );
-		(yy_did_buffer_switch_on_eof) = 1;
-	}
-}
-
-/* Allocates the stack if it does not exist.
- *  Guarantees space for at least one push.
- */
-static void yyensure_buffer_stack (void)
-{
-	int num_to_alloc;
-    
-	if (!(yy_buffer_stack)) {
-
-		/* First allocation is just for 2 elements, since we don't know if this
-		 * scanner will even need a stack. We use 2 instead of 1 to avoid an
-		 * immediate realloc on the next call.
-         */
-		num_to_alloc = 1;
-		(yy_buffer_stack) = (struct yy_buffer_state**)yyalloc
-								(num_to_alloc * sizeof(struct yy_buffer_state*)
-								);
-		
-		memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*));
-				
-		(yy_buffer_stack_max) = num_to_alloc;
-		(yy_buffer_stack_top) = 0;
-		return;
-	}
-
-	if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){
-
-		/* Increase the buffer to prepare for a possible push. */
-		int grow_size = 8 /* arbitrary grow size */;
-
-		num_to_alloc = (yy_buffer_stack_max) + grow_size;
-		(yy_buffer_stack) = (struct yy_buffer_state**)yyrealloc
-								((yy_buffer_stack),
-								num_to_alloc * sizeof(struct yy_buffer_state*)
-								);
-
-		/* zero only the new slots.*/
-		memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size * sizeof(struct yy_buffer_state*));
-		(yy_buffer_stack_max) = num_to_alloc;
-	}
-}
-
-/** Setup the input buffer state to scan directly from a user-specified character buffer.
- * @param base the character buffer
- * @param size the size in bytes of the character buffer
- * 
- * @return the newly allocated buffer state object. 
- */
-YY_BUFFER_STATE yy_scan_buffer  (char * base, yy_size_t  size )
-{
-	YY_BUFFER_STATE b;
-    
-	if ( size < 2 ||
-	     base[size-2] != YY_END_OF_BUFFER_CHAR ||
-	     base[size-1] != YY_END_OF_BUFFER_CHAR )
-		/* They forgot to leave room for the EOB's. */
-		return 0;
-
-	b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state )  );
-	if ( ! b )
-		YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" );
-
-	b->yy_buf_size = size - 2;	/* "- 2" to take care of EOB's */
-	b->yy_buf_pos = b->yy_ch_buf = base;
-	b->yy_is_our_buffer = 0;
-	b->yy_input_file = 0;
-	b->yy_n_chars = b->yy_buf_size;
-	b->yy_is_interactive = 0;
-	b->yy_at_bol = 1;
-	b->yy_fill_buffer = 0;
-	b->yy_buffer_status = YY_BUFFER_NEW;
-
-	yy_switch_to_buffer(b  );
-
-	return b;
-}
-
-/** Setup the input buffer state to scan a string. The next call to yylex() will
- * scan from a @e copy of @a str.
- * @param str a NUL-terminated string to scan
- * 
- * @return the newly allocated buffer state object.
- * @note If you want to scan bytes that may contain NUL values, then use
- *       yy_scan_bytes() instead.
- */
-YY_BUFFER_STATE yy_scan_string (yyconst char * yy_str )
-{
-    
-	return yy_scan_bytes(yy_str,strlen(yy_str) );
-}
-
-/** Setup the input buffer state to scan the given bytes. The next call to yylex() will
- * scan from a @e copy of @a bytes.
- * @param bytes the byte buffer to scan
- * @param len the number of bytes in the buffer pointed to by @a bytes.
- * 
- * @return the newly allocated buffer state object.
- */
-YY_BUFFER_STATE yy_scan_bytes  (yyconst char * bytes, int  len )
-{
-	YY_BUFFER_STATE b;
-	char *buf;
-	yy_size_t n;
-	int i;
-    
-	/* Get memory for full buffer, including space for trailing EOB's. */
-	n = len + 2;
-	buf = (char *) yyalloc(n  );
-	if ( ! buf )
-		YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" );
-
-	for ( i = 0; i < len; ++i )
-		buf[i] = bytes[i];
-
-	buf[len] = buf[len+1] = YY_END_OF_BUFFER_CHAR;
-
-	b = yy_scan_buffer(buf,n );
-	if ( ! b )
-		YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" );
-
-	/* It's okay to grow etc. this buffer, and we should throw it
-	 * away when we're done.
-	 */
-	b->yy_is_our_buffer = 1;
-
-	return b;
-}
-
-#ifndef YY_EXIT_FAILURE
-#define YY_EXIT_FAILURE 2
-#endif
-
-static void yy_fatal_error (yyconst char* msg )
-{
-    	(void) fprintf( stderr, "%s\n", msg );
-	exit( YY_EXIT_FAILURE );
-}
-
-/* Redefine yyless() so it works in section 3 code. */
-
-#undef yyless
-#define yyless(n) \
-	do \
-		{ \
-		/* Undo effects of setting up yytext. */ \
-        int yyless_macro_arg = (n); \
-        YY_LESS_LINENO(yyless_macro_arg);\
-		yytext[yyleng] = (yy_hold_char); \
-		(yy_c_buf_p) = yytext + yyless_macro_arg; \
-		(yy_hold_char) = *(yy_c_buf_p); \
-		*(yy_c_buf_p) = '\0'; \
-		yyleng = yyless_macro_arg; \
-		} \
-	while ( 0 )
-
-/* Accessor  methods (get/set functions) to struct members. */
-
-/** Get the current line number.
- * 
- */
-int yyget_lineno  (void)
-{
-        
-    return yylineno;
-}
-
-/** Get the input stream.
- * 
- */
-FILE *yyget_in  (void)
-{
-        return yyin;
-}
-
-/** Get the output stream.
- * 
- */
-FILE *yyget_out  (void)
-{
-        return yyout;
-}
-
-/** Get the length of the current token.
- * 
- */
-int yyget_leng  (void)
-{
-        return yyleng;
-}
-
-/** Get the current token.
- * 
- */
-
-char *yyget_text  (void)
-{
-        return yytext;
-}
-
-/** Set the current line number.
- * @param line_number
- * 
- */
-void yyset_lineno (int  line_number )
-{
-    
-    yylineno = line_number;
-}
-
-/** Set the input stream. This does not discard the current
- * input buffer.
- * @param in_str A readable stream.
- * 
- * @see yy_switch_to_buffer
- */
-void yyset_in (FILE *  in_str )
-{
-        yyin = in_str ;
-}
-
-void yyset_out (FILE *  out_str )
-{
-        yyout = out_str ;
-}
-
-int yyget_debug  (void)
-{
-        return yy_flex_debug;
-}
-
-void yyset_debug (int  bdebug )
-{
-        yy_flex_debug = bdebug ;
-}
-
-/* yylex_destroy is for both reentrant and non-reentrant scanners. */
-int yylex_destroy  (void)
-{
-    
-    /* Pop the buffer stack, destroying each element. */
-	while(YY_CURRENT_BUFFER){
-		yy_delete_buffer(YY_CURRENT_BUFFER  );
-		YY_CURRENT_BUFFER_LVALUE = NULL;
-		yypop_buffer_state();
-	}
-
-	/* Destroy the stack itself. */
-	yyfree((yy_buffer_stack) );
-	(yy_buffer_stack) = NULL;
-
-    return 0;
-}
-
-/*
- * Internal utility routines.
- */
-
-#ifndef yytext_ptr
-static void yy_flex_strncpy (char* s1, yyconst char * s2, int n )
-{
-	register int i;
-    	for ( i = 0; i < n; ++i )
-		s1[i] = s2[i];
-}
-#endif
-
-#ifdef YY_NEED_STRLEN
-static int yy_flex_strlen (yyconst char * s )
-{
-	register int n;
-    	for ( n = 0; s[n]; ++n )
-		;
-
-	return n;
-}
-#endif
-
-void *yyalloc (yy_size_t  size )
-{
-	return (void *) malloc( size );
-}
-
-void *yyrealloc  (void * ptr, yy_size_t  size )
-{
-	/* The cast to (char *) in the following accommodates both
-	 * implementations that use char* generic pointers, and those
-	 * that use void* generic pointers.  It works with the latter
-	 * because both ANSI C and C++ allow castless assignment from
-	 * any pointer type to void*, and deal with argument conversions
-	 * as though doing an assignment.
-	 */
-	return (void *) realloc( (char *) ptr, size );
-}
-
-void yyfree (void * ptr )
-{
-	free( (char *) ptr );	/* see yyrealloc() for (char *) cast */
-}
-
-#define YYTABLES_NAME "yytables"
-
-#undef YY_NEW_FILE
-#undef YY_FLUSH_BUFFER
-#undef yy_set_bol
-#undef yy_new_buffer
-#undef yy_set_interactive
-#undef yytext_ptr
-#undef YY_DO_BEFORE_ACTION
-
-#ifdef YY_DECL_IS_OURS
-#undef YY_DECL_IS_OURS
-#undef YY_DECL
-#endif
-#line 96 "arith_lex.l"
-
-
-
-void
-arith_lex_reset() {
-#ifdef YY_NEW_FILE
-	YY_NEW_FILE;
-#endif
-}
-
diff --git a/sh/arith_lex.l b/sh/arith_lex.l
deleted file mode 100644
index 79116fc..0000000
--- a/sh/arith_lex.l
+++ /dev/null
@@ -1,103 +0,0 @@
-%{
-/*	$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)arith_lex.l	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: arith_lex.l,v 1.12.6.1 2005/04/07 11:38:58 tron Exp $");
-#endif
-#endif /* not lint */
-
-#include <unistd.h>
-#include "arith.h"
-#include "error.h"
-#include "expand.h"
-#include "var.h"
-
-extern int yylval;
-extern char *arith_buf, *arith_startbuf;
-#undef YY_INPUT
-#define YY_INPUT(buf,result,max) \
-	result = (*buf = *arith_buf++) ? 1 : YY_NULL;
-#define YY_NO_UNPUT
-%}
-%option noyywrap
-
-%%
-[ \t\n]	{ ; }
-0x[0-9a-fA-F]+	{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-0[0-7]*		{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-[1-9][0-9]*	{ yylval = strtol(yytext, 0, 0); return(ARITH_NUM); }
-[A-Za-z_][A-Za-z_0-9]*	{ char *v = lookupvar(yytext);
-			if (v) {
-				yylval = strtol(v, &v, 0);
-				if (*v == 0)
-					return ARITH_NUM;
-			}
-			error("arith: syntax error: \"%s\"", arith_startbuf);
-		}
-"("	{ return(ARITH_LPAREN); }
-")"	{ return(ARITH_RPAREN); }
-"||"	{ return(ARITH_OR); }
-"&&"	{ return(ARITH_AND); }
-"|"	{ return(ARITH_BOR); }
-"^"	{ return(ARITH_BXOR); }
-"&"	{ return(ARITH_BAND); }
-"=="	{ return(ARITH_EQ); }
-"!="	{ return(ARITH_NE); }
-">"	{ return(ARITH_GT); }
-">="	{ return(ARITH_GE); }
-"<"	{ return(ARITH_LT); }
-"<="	{ return(ARITH_LE); }
-"<<"	{ return(ARITH_LSHIFT); }
-">>"	{ return(ARITH_RSHIFT); }
-"*"	{ return(ARITH_MUL); }
-"/"	{ return(ARITH_DIV); }
-"%"	{ return(ARITH_REM); }
-"+"	{ return(ARITH_ADD); }
-"-"	{ return(ARITH_SUB); }
-"~"	{ return(ARITH_BNOT); }
-"!"	{ return(ARITH_NOT); }
-.	{ error("arith: syntax error: \"%s\"", arith_startbuf); }
-%%
-
-void
-arith_lex_reset() {
-#ifdef YY_NEW_FILE
-	YY_NEW_FILE;
-#endif
-}
diff --git a/sh/bltin/bltin.h b/sh/bltin/bltin.h
deleted file mode 100644
index b8f9d75..0000000
--- a/sh/bltin/bltin.h
+++ /dev/null
@@ -1,94 +0,0 @@
-/*	$NetBSD: bltin.h,v 1.11 2003/08/07 09:05:40 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)bltin.h	8.1 (Berkeley) 5/31/93
- */
-
-/*
- * This file is included by programs which are optionally built into the
- * shell.  If SHELL is defined, we try to map the standard UNIX library
- * routines to ash routines using defines.
- */
-
-#include "../shell.h"
-#include "../mystring.h"
-#ifdef SHELL
-#include "../output.h"
-#include "../error.h"
-#undef stdout
-#undef stderr
-#undef putc
-#undef putchar
-#undef fileno
-#define stdout out1
-#define stderr out2
-#define printf out1fmt
-#define putc(c, file)	outc(c, file)
-#define putchar(c)	out1c(c)
-#define FILE struct output
-#define fprintf outfmt
-#define fputs outstr
-#define fflush flushout
-#define fileno(f) ((f)->fd)
-#define INITARGS(argv)
-#define	err sh_err
-#define	verr sh_verr
-#define	errx sh_errx
-#define	verrx sh_verrx
-#define	warn sh_warn
-#define	vwarn sh_vwarn
-#define	warnx sh_warnx
-#define	vwarnx sh_vwarnx
-#define exit sh_exit
-#define setprogname(s)
-#define getprogname() commandname
-#define setlocate(l,s) 0
-
-#define getenv(p) bltinlookup((p),0)
-
-#else
-#undef NULL
-#include <stdio.h>
-#undef main
-#define INITARGS(argv)	if ((commandname = argv[0]) == NULL) {fputs("Argc is zero\n", stderr); exit(2);} else
-#endif
-
-pointer stalloc(int);
-void error(const char *, ...);
-void sh_warnx(const char *, ...);
-void sh_exit(int) __attribute__((__noreturn__));
-
-int echocmd(int, char **);
-
-
-extern const char *commandname;
diff --git a/sh/bltin/echo.1 b/sh/bltin/echo.1
deleted file mode 100644
index 7e71fa3..0000000
--- a/sh/bltin/echo.1
+++ /dev/null
@@ -1,109 +0,0 @@
-.\"	$NetBSD: echo.1,v 1.13 2003/08/07 09:05:40 agc Exp $
-.\"
-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Kenneth Almquist.
-.\" Copyright 1989 by Kenneth Almquist
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)echo.1	8.1 (Berkeley) 5/31/93
-.\"
-.Dd May 31, 1993
-.Dt ECHO 1
-.Os
-.Sh NAME
-.Nm echo
-.Nd produce message in a shell script
-.Sh SYNOPSIS
-.Nm
-.Op Fl n | Fl e
-.Ar args ...
-.Sh DESCRIPTION
-.Nm
-prints its arguments on the standard output, separated by spaces.
-Unless the
-.Fl n
-option is present, a newline is output following the arguments.
-The
-.Fl e
-option causes
-.Nm
-to treat the escape sequences specially, as described in the following
-paragraph.
-The
-.Fl e
-option is the default, and is provided solely for compatibility with
-other systems.
-Only one of the options
-.Fl n
-and
-.Fl e
-may be given.
-.Pp
-If any of the following sequences of characters is encountered during
-output, the sequence is not output.  Instead, the specified action is
-performed:
-.Bl -tag -width indent
-.It Li \eb
-A backspace character is output.
-.It Li \ec
-Subsequent output is suppressed.  This is normally used at the end of the
-last argument to suppress the trailing newline that
-.Nm
-would otherwise output.
-.It Li \ef
-Output a form feed.
-.It Li \en
-Output a newline character.
-.It Li \er
-Output a carriage return.
-.It Li \et
-Output a (horizontal) tab character.
-.It Li \ev
-Output a vertical tab.
-.It Li \e0 Ns Ar digits
-Output the character whose value is given by zero to three digits.
-If there are zero digits, a nul character is output.
-.It Li \e\e
-Output a backslash.
-.El
-.Sh HINTS
-Remember that backslash is special to the shell and needs to be escaped.
-To output a message to standard error, say
-.Pp
-.D1  echo message \*[Gt]\*[Am]2
-.Sh BUGS
-The octal character escape mechanism
-.Pq Li \e0 Ns Ar digits
-differs from the
-C language mechanism.
-.Pp
-There is no way to force
-.Nm
-to treat its arguments literally, rather than interpreting them as
-options and escape sequences.
diff --git a/sh/bltin/echo.c b/sh/bltin/echo.c
deleted file mode 100644
index bed7535..0000000
--- a/sh/bltin/echo.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*	$NetBSD: echo.c,v 1.12 2005/02/06 04:43:43 perry Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)echo.c	8.1 (Berkeley) 5/31/93
- */
-
-/*
- * Echo command.
- *
- * echo is steeped in tradition - several of them!
- * netbsd has supported 'echo [-n | -e] args' in spite of -e not being
- * documented anywhere.
- * Posix requires that -n be supported, output from strings containing
- * \ is implementation defined
- * The Single Unix Spec requires that \ escapes be treated as if -e
- * were set, but that -n not be treated as an option.
- * (ksh supports 'echo [-eEn] args', but not -- so that it is actually
- * impossible to actually output '-n')
- *
- * It is suggested that 'printf "%b" "string"' be used to get \ sequences
- * expanded.  printf is now a builtin of netbsd's sh and csh.
- */
-
-//#define main echocmd
-
-#include "bltin.h"
-
-int
-echocmd(int argc, char **argv)
-{
-	char **ap;
-	char *p;
-	char c;
-	int count;
-	int nflag = 0;
-	int eflag = 0;
-
-	ap = argv;
-	if (argc)
-		ap++;
-
-	if ((p = *ap) != NULL) {
-		if (equal(p, "-n")) {
-			nflag = 1;
-			ap++;
-		} else if (equal(p, "-e")) {
-			eflag = 1;
-			ap++;
-		}
-	}
-
-	while ((p = *ap++) != NULL) {
-		while ((c = *p++) != '\0') {
-			if (c == '\\' && eflag) {
-				switch (*p++) {
-				case 'a':  c = '\a';  break;	/* bell */
-				case 'b':  c = '\b';  break;
-				case 'c':  return 0;		/* exit */
-				case 'e':  c =  033;  break;	/* escape */
-				case 'f':  c = '\f';  break;
-				case 'n':  c = '\n';  break;
-				case 'r':  c = '\r';  break;
-				case 't':  c = '\t';  break;
-				case 'v':  c = '\v';  break;
-				case '\\':  break;		/* c = '\\' */
-				case '0':
-					c = 0;
-					count = 3;
-					while (--count >= 0 && (unsigned)(*p - '0') < 8)
-						c = (c << 3) + (*p++ - '0');
-					break;
-				default:
-					/* Output the '/' and char following */
-					p--;
-					break;
-				}
-			}
-			putchar(c);
-		}
-		if (*ap)
-			putchar(' ');
-	}
-	if (! nflag)
-		putchar('\n');
-	return 0;
-}
diff --git a/sh/builtins.c b/sh/builtins.c
deleted file mode 100644
index 344dbd6..0000000
--- a/sh/builtins.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include "shell.h"
-#include "builtins.h"
-
-const struct builtincmd builtincmd[] = {
-
-	{ "command",	bltincmd },
-	{ "bg",	bgcmd },
-	{ "cd",	cdcmd },
-	{ "chdir",	cdcmd },
-	{ "echo",	echocmd },
-	{ "exp",	expcmd },
-	{ "let",	expcmd },
-	{ "false",	falsecmd },
-#if WITH_HISTORY
-	{ "fc",	histcmd },
-	{ "inputrc",	inputrc },
-#endif
-	{ "fg",	fgcmd },
-	{ "getopts",	getoptscmd },
-	{ "hash",	hashcmd },
-	{ "jobid",	jobidcmd },
-	{ "jobs",	jobscmd },
-	{ "local",	localcmd },
-#ifndef SMALL
-#endif
-	{ "pwd",	pwdcmd },
-	{ "read",	readcmd },
-	{ "setvar",	setvarcmd },
-	{ "true",	truecmd },
-	{ "type",	typecmd },
-	{ "umask",	umaskcmd },
-	{ "unalias",	unaliascmd },
-	{ "wait",	waitcmd },
-	{ "alias",	aliascmd },
-	{ "ulimit",	ulimitcmd },
-	{ "wordexp",	wordexpcmd },
-	{ 0, 0 },
-};
-
-const struct builtincmd splbltincmd[] = {
-	{ "break",	breakcmd },
-	{ "continue",	breakcmd },
-	{ ".",	dotcmd },
-	{ "eval",	evalcmd },
-	{ "exec",	execcmd },
-	{ "exit",	exitcmd },
-	{ "export",	exportcmd },
-	{ "readonly",	exportcmd },
-	{ "return",	returncmd },
-	{ "set",	setcmd },
-	{ "shift",	shiftcmd },
-	{ "times",	timescmd },
-	{ "trap",	trapcmd },
-	{ ":",	truecmd },
-	{ "unset",	unsetcmd },
-	{ 0, 0 },
-};
diff --git a/sh/builtins.def b/sh/builtins.def
deleted file mode 100644
index 18e56c6..0000000
--- a/sh/builtins.def
+++ /dev/null
@@ -1,94 +0,0 @@
-#!/bin/sh -
-#	$NetBSD: builtins.def,v 1.21 2004/07/13 15:05:59 seb Exp $
-#
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)builtins.def	8.4 (Berkeley) 5/4/95
-
-#
-# This file lists all the builtin commands.  The first column is the name
-# of a C routine.
-# The -j flag specifies that this command is to be excluded from systems
-# without job control.
-# The -h flag specifies that this command is to be excluded from systems
-# based on the SMALL compile-time symbol.
-# The -s flag specifies that this is a posix 'special builtin' command.
-# The -u flag specifies that this is a posix 'standard utility'.
-# The rest of the line specifies the command name or names used to run
-# the command.
-
-bltincmd	-u command
-bgcmd -j	-u bg
-breakcmd	-s break -s continue
-cdcmd		-u cd chdir
-dotcmd		-s .
-echocmd		echo
-evalcmd		-s eval
-execcmd		-s exec
-exitcmd		-s exit
-expcmd		exp let
-exportcmd	-s export -s readonly
-falsecmd	-u false
-#if WITH_HISTORY
-histcmd -h	-u fc
-inputrc		inputrc
-#endif
-fgcmd -j	-u fg
-getoptscmd	-u getopts
-hashcmd		hash
-jobidcmd	jobid
-jobscmd		-u jobs
-localcmd	local
-#ifndef SMALL
-##printfcmd	printf
-#endif
-pwdcmd		-u pwd
-readcmd		-u read
-returncmd	-s return
-setcmd		-s set
-setvarcmd	setvar
-shiftcmd	-s shift
-timescmd	-s times
-trapcmd		-s trap
-truecmd		-s : -u true
-typecmd		type
-umaskcmd	-u umask
-unaliascmd	-u unalias
-unsetcmd	-s unset
-waitcmd		-u wait
-aliascmd	-u alias
-ulimitcmd	ulimit
-##testcmd		test [
-##killcmd		-u kill		# mandated by posix for 'kill %job'
-wordexpcmd	wordexp
-#newgrp		-u newgrp	# optional command in posix
-
-#exprcmd	expr
diff --git a/sh/builtins.h b/sh/builtins.h
deleted file mode 100644
index 1f9e45a..0000000
--- a/sh/builtins.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include <sys/cdefs.h>
-
-struct builtincmd {
-      const char *name;
-      int (*builtin)(int, char **);
-};
-
-extern const struct builtincmd builtincmd[];
-extern const struct builtincmd splbltincmd[];
-
-
-int bltincmd(int, char **);
-int bgcmd(int, char **);
-int breakcmd(int, char **);
-int cdcmd(int, char **);
-int dotcmd(int, char **);
-int echocmd(int, char **);
-int evalcmd(int, char **);
-int execcmd(int, char **);
-int exitcmd(int, char **);
-int expcmd(int, char **);
-int exportcmd(int, char **);
-int falsecmd(int, char **);
-#if WITH_HISTORY
-int histcmd(int, char **);
-int inputrc(int, char **);
-#endif
-int fgcmd(int, char **);
-int getoptscmd(int, char **);
-int hashcmd(int, char **);
-int jobidcmd(int, char **);
-int jobscmd(int, char **);
-int localcmd(int, char **);
-#ifndef SMALL
-#endif
-int pwdcmd(int, char **);
-int readcmd(int, char **);
-int returncmd(int, char **);
-int setcmd(int, char **);
-int setvarcmd(int, char **);
-int shiftcmd(int, char **);
-int timescmd(int, char **);
-int trapcmd(int, char **);
-int truecmd(int, char **);
-int typecmd(int, char **);
-int umaskcmd(int, char **);
-int unaliascmd(int, char **);
-int unsetcmd(int, char **);
-int waitcmd(int, char **);
-int aliascmd(int, char **);
-int ulimitcmd(int, char **);
-int wordexpcmd(int, char **);
diff --git a/sh/cd.c b/sh/cd.c
deleted file mode 100644
index 4ab599b..0000000
--- a/sh/cd.c
+++ /dev/null
@@ -1,446 +0,0 @@
-/*	$NetBSD: cd.c,v 1.34 2003/11/14 20:00:28 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)cd.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: cd.c,v 1.34 2003/11/14 20:00:28 dsl Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <errno.h>
-
-/*
- * The cd and pwd commands.
- */
-
-#include "shell.h"
-#include "var.h"
-#include "nodes.h"	/* for jobs.h */
-#include "jobs.h"
-#include "options.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "exec.h"
-#include "redir.h"
-#include "mystring.h"
-#include "show.h"
-#include "cd.h"
-
-STATIC int docd(char *, int);
-STATIC char *getcomponent(void);
-STATIC void updatepwd(char *);
-STATIC void find_curdir(int noerror);
-
-char *curdir = NULL;		/* current working directory */
-char *prevdir;			/* previous working directory */
-STATIC char *cdcomppath;
-
-int
-cdcmd(int argc, char **argv)
-{
-	const char *dest;
-	const char *path;
-	char *p, *d;
-	struct stat statb;
-	int print = cdprint;	/* set -cdprint to enable */
-
-	nextopt(nullstr);
-
-	/*
-	 * Try (quite hard) to have 'curdir' defined, nothing has set
-	 * it on entry to the shell, but we want 'cd fred; cd -' to work.
-	 */
-	getpwd(1);
-	dest = *argptr;
-	if (dest == NULL) {
-		dest = bltinlookup("HOME", 1);
-		if (dest == NULL)
-			error("HOME not set");
-	} else {
-		if (argptr[1]) {
-			/* Do 'ksh' style substitution */
-			if (!curdir)
-				error("PWD not set");
-			p = strstr(curdir, dest);
-			if (!p)
-				error("bad substitution");
-			d = stalloc(strlen(curdir) + strlen(argptr[1]) + 1);
-			memcpy(d, curdir, p - curdir);
-			strcpy(d + (p - curdir), argptr[1]);
-			strcat(d, p + strlen(dest));
-			dest = d;
-			print = 1;
-		}
-	}
-
-	if (dest[0] == '-' && dest[1] == '\0') {
-		dest = prevdir ? prevdir : curdir;
-		print = 1;
-	}
-	if (*dest == '\0')
-	        dest = ".";
-	if (*dest == '/' || (path = bltinlookup("CDPATH", 1)) == NULL)
-		path = nullstr;
-	while ((p = padvance(&path, dest)) != NULL) {
-		if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
-			if (!print) {
-				/*
-				 * XXX - rethink
-				 */
-				if (p[0] == '.' && p[1] == '/' && p[2] != '\0')
-					p += 2;
-				print = strcmp(p, dest);
-			}
-			if (docd(p, print) >= 0)
-				return 0;
-
-		}
-	}
-	error("can't cd to %s", dest);
-	/* NOTREACHED */
-}
-
-
-/*
- * Actually do the chdir.  In an interactive shell, print the
- * directory name if "print" is nonzero.
- */
-
-STATIC int
-docd(char *dest, int print)
-{
-	char *p;
-	char *q;
-	char *component;
-	struct stat statb;
-	int first;
-	int badstat;
-
-	TRACE(("docd(\"%s\", %d) called\n", dest, print));
-
-	/*
-	 *  Check each component of the path. If we find a symlink or
-	 *  something we can't stat, clear curdir to force a getcwd()
-	 *  next time we get the value of the current directory.
-	 */
-	badstat = 0;
-	cdcomppath = stalloc(strlen(dest) + 1);
-	scopy(dest, cdcomppath);
-	STARTSTACKSTR(p);
-	if (*dest == '/') {
-		STPUTC('/', p);
-		cdcomppath++;
-	}
-	first = 1;
-	while ((q = getcomponent()) != NULL) {
-		if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0'))
-			continue;
-		if (! first)
-			STPUTC('/', p);
-		first = 0;
-		component = q;
-		while (*q)
-			STPUTC(*q++, p);
-		if (equal(component, ".."))
-			continue;
-		STACKSTRNUL(p);
-		if ((lstat(stackblock(), &statb) < 0)
-		    || (S_ISLNK(statb.st_mode)))  {
-			/* print = 1; */
-			badstat = 1;
-			break;
-		}
-	}
-
-	INTOFF;
-	if (chdir(dest) < 0) {
-		INTON;
-		return -1;
-	}
-	updatepwd(badstat ? NULL : dest);
-	INTON;
-	if (print && iflag && curdir)
-		out1fmt("%s\n", curdir);
-	return 0;
-}
-
-
-/*
- * Get the next component of the path name pointed to by cdcomppath.
- * This routine overwrites the string pointed to by cdcomppath.
- */
-
-STATIC char *
-getcomponent()
-{
-	char *p;
-	char *start;
-
-	if ((p = cdcomppath) == NULL)
-		return NULL;
-	start = cdcomppath;
-	while (*p != '/' && *p != '\0')
-		p++;
-	if (*p == '\0') {
-		cdcomppath = NULL;
-	} else {
-		*p++ = '\0';
-		cdcomppath = p;
-	}
-	return start;
-}
-
-
-
-/*
- * Update curdir (the name of the current directory) in response to a
- * cd command.  We also call hashcd to let the routines in exec.c know
- * that the current directory has changed.
- */
-
-STATIC void
-updatepwd(char *dir)
-{
-	char *new;
-	char *p;
-
-	hashcd();				/* update command hash table */
-
-	/*
-	 * If our argument is NULL, we don't know the current directory
-	 * any more because we traversed a symbolic link or something
-	 * we couldn't stat().
-	 */
-	if (dir == NULL || curdir == NULL)  {
-		if (prevdir)
-			ckfree(prevdir);
-		INTOFF;
-		prevdir = curdir;
-		curdir = NULL;
-		getpwd(1);
-		INTON;
-		if (curdir)
-			setvar("PWD", curdir, VEXPORT);
-		else
-			unsetvar("PWD", 0);
-		return;
-	}
-	cdcomppath = stalloc(strlen(dir) + 1);
-	scopy(dir, cdcomppath);
-	STARTSTACKSTR(new);
-	if (*dir != '/') {
-		p = curdir;
-		while (*p)
-			STPUTC(*p++, new);
-		if (p[-1] == '/')
-			STUNPUTC(new);
-	}
-	while ((p = getcomponent()) != NULL) {
-		if (equal(p, "..")) {
-			while (new > stackblock() && (STUNPUTC(new), *new) != '/');
-		} else if (*p != '\0' && ! equal(p, ".")) {
-			STPUTC('/', new);
-			while (*p)
-				STPUTC(*p++, new);
-		}
-	}
-	if (new == stackblock())
-		STPUTC('/', new);
-	STACKSTRNUL(new);
-	INTOFF;
-	if (prevdir)
-		ckfree(prevdir);
-	prevdir = curdir;
-	curdir = savestr(stackblock());
-	setvar("PWD", curdir, VEXPORT);
-	INTON;
-}
-
-/*
- * Posix says the default should be 'pwd -L' (as below), however
- * the 'cd' command (above) does something much nearer to the
- * posix 'cd -P' (not the posix default of 'cd -L').
- * If 'cd' is changed to support -P/L then the default here
- * needs to be revisited if the historic behaviour is to be kept.
- */
-
-int
-pwdcmd(int argc, char **argv)
-{
-	int i;
-	char opt = 'L';
-
-	while ((i = nextopt("LP")) != '\0')
-		opt = i;
-	if (*argptr)
-		error("unexpected argument");
-
-	if (opt == 'L')
-		getpwd(0);
-	else
-		find_curdir(0);
-
-	setvar("PWD", curdir, VEXPORT);
-	out1str(curdir);
-	out1c('\n');
-	return 0;
-}
-
-
-
-
-#define MAXPWD 256
-
-/*
- * Find out what the current directory is. If we already know the current
- * directory, this routine returns immediately.
- */
-void
-getpwd(int noerror)
-{
-	char *pwd;
-	struct stat stdot, stpwd;
-	static int first = 1;
-
-	if (curdir)
-		return;
-
-	if (first) {
-		first = 0;
-		pwd = getenv("PWD");
-		if (pwd && *pwd == '/' && stat(".", &stdot) != -1 &&
-		    stat(pwd, &stpwd) != -1 &&
-		    stdot.st_dev == stpwd.st_dev &&
-		    stdot.st_ino == stpwd.st_ino) {
-			curdir = savestr(pwd);
-			return;
-		}
-	}
-
-	find_curdir(noerror);
-
-	return;
-}
-
-STATIC void
-find_curdir(int noerror)
-{
-	int i;
-	char *pwd;
-
-	/*
-	 * Things are a bit complicated here; we could have just used
-	 * getcwd, but traditionally getcwd is implemented using popen
-	 * to /bin/pwd. This creates a problem for us, since we cannot
-	 * keep track of the job if it is being ran behind our backs.
-	 * So we re-implement getcwd(), and we suppress interrupts
-	 * throughout the process. This is not completely safe, since
-	 * the user can still break out of it by killing the pwd program.
-	 * We still try to use getcwd for systems that we know have a
-	 * c implementation of getcwd, that does not open a pipe to
-	 * /bin/pwd.
-	 */
-#if defined(__NetBSD__) || defined(__SVR4) || defined(__linux__)
-	for (i = MAXPWD;; i *= 2) {
-		pwd = stalloc(i);
-		if (getcwd(pwd, i) != NULL) {
-			curdir = savestr(pwd);
-			return;
-		}
-		stunalloc(pwd);
-		if (errno == ERANGE)
-			continue;
-		if (!noerror)
-			error("getcwd() failed: %s", strerror(errno));
-		return;
-	}
-#else
-	{
-		char *p;
-		int status;
-		struct job *jp;
-		int pip[2];
-
-		pwd = stalloc(MAXPWD);
-		INTOFF;
-		if (pipe(pip) < 0)
-			error("Pipe call failed");
-		jp = makejob((union node *)NULL, 1);
-		if (forkshell(jp, (union node *)NULL, FORK_NOJOB) == 0) {
-			(void) close(pip[0]);
-			if (pip[1] != 1) {
-				close(1);
-				copyfd(pip[1], 1);
-				close(pip[1]);
-			}
-			(void) execl("/bin/pwd", "pwd", (char *)0);
-			sh_warn("Cannot exec /bin/pwd");
-			exit(1);
-		}
-		(void) close(pip[1]);
-		pip[1] = -1;
-		p = pwd;
-		while ((i = read(pip[0], p, pwd + MAXPWD - p)) > 0
-		     || (i == -1 && errno == EINTR)) {
-			if (i > 0)
-				p += i;
-		}
-		(void) close(pip[0]);
-		pip[0] = -1;
-		status = waitforjob(jp);
-		if (status != 0)
-			error((char *)0);
-		if (i < 0 || p == pwd || p[-1] != '\n') {
-			if (noerror) {
-				INTON;
-				return;
-			}
-			error("pwd command failed");
-		}
-		p[-1] = '\0';
-		INTON;
-		curdir = savestr(pwd);
-		return;
-	}
-#endif
-}
diff --git a/sh/cd.h b/sh/cd.h
deleted file mode 100644
index a4dcc01..0000000
--- a/sh/cd.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*	$NetBSD: cd.h,v 1.4 2003/08/07 09:05:30 agc Exp $	*/
-
-/*-
- * Copyright (c) 1995
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- */
-
-void	getpwd(int);
-int	cdcmd(int, char **);
-int	pwdcmd(int, char **);
diff --git a/sh/error.c b/sh/error.c
deleted file mode 100644
index 8cbed19..0000000
--- a/sh/error.c
+++ /dev/null
@@ -1,366 +0,0 @@
-/*	$NetBSD: error.c,v 1.31 2003/08/07 09:05:30 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)error.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: error.c,v 1.31 2003/08/07 09:05:30 agc Exp $");
-#endif
-#endif /* not lint */
-
-/*
- * Errors and exceptions.
- */
-
-#include <signal.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
-#include "shell.h"
-#include "main.h"
-#include "options.h"
-#include "output.h"
-#include "error.h"
-#include "show.h"
-
-#define signal bsd_signal
-/*
- * Code to handle exceptions in C.
- */
-
-struct jmploc *handler;
-int exception;
-volatile int suppressint;
-volatile int intpending;
-char *commandname;
-
-
-static void exverror(int, const char *, va_list)
-    __attribute__((__noreturn__));
-
-/*
- * Called to raise an exception.  Since C doesn't include exceptions, we
- * just do a longjmp to the exception handler.  The type of exception is
- * stored in the global variable "exception".
- */
-
-void
-exraise(int e)
-{
-	if (handler == NULL)
-		abort();
-	exception = e;
-	longjmp(handler->loc, 1);
-}
-
-
-/*
- * Called from trap.c when a SIGINT is received.  (If the user specifies
- * that SIGINT is to be trapped or ignored using the trap builtin, then
- * this routine is not called.)  Suppressint is nonzero when interrupts
- * are held using the INTOFF macro.  The call to _exit is necessary because
- * there is a short period after a fork before the signal handlers are
- * set to the appropriate value for the child.  (The test for iflag is
- * just defensive programming.)
- */
-
-void
-onint(void)
-{
-	sigset_t nsigset;
-
-	if (suppressint) {
-		intpending = 1;
-		return;
-	}
-	intpending = 0;
-	sigemptyset(&nsigset);
-	sigprocmask(SIG_SETMASK, &nsigset, NULL);
-	if (rootshell && iflag)
-		exraise(EXINT);
-	else {
-		signal(SIGINT, SIG_DFL);
-		raise(SIGINT);
-	}
-	/* NOTREACHED */
-}
-
-static void
-exvwarning(int sv_errno, const char *msg, va_list ap)
-{
-	/* Partially emulate line buffered output so that:
-	 *	printf '%d\n' 1 a 2
-	 * and
-	 *	printf '%d %d %d\n' 1 a 2
-	 * both generate sensible text when stdout and stderr are merged.
-	 */
-	if (output.nextc != output.buf && output.nextc[-1] == '\n')
-		flushout(&output);
-	if (commandname)
-		outfmt(&errout, "%s: ", commandname);
-	if (msg != NULL) {
-		doformat(&errout, msg, ap);
-		if (sv_errno >= 0)
-			outfmt(&errout, ": ");
-	}
-	if (sv_errno >= 0)
-		outfmt(&errout, "%s", strerror(sv_errno));
-	out2c('\n');
-	flushout(&errout);
-}
-
-/*
- * Exverror is called to raise the error exception.  If the second argument
- * is not NULL then error prints an error message using printf style
- * formatting.  It then raises the error exception.
- */
-static void
-exverror(int cond, const char *msg, va_list ap)
-{
-	CLEAR_PENDING_INT;
-	INTOFF;
-
-#ifdef DEBUG
-	if (msg) {
-		TRACE(("exverror(%d, \"", cond));
-		TRACEV((msg, ap));
-		TRACE(("\") pid=%d\n", getpid()));
-	} else
-		TRACE(("exverror(%d, NULL) pid=%d\n", cond, getpid()));
-#endif
-	if (msg)
-		exvwarning(-1, msg, ap);
-
-	flushall();
-	exraise(cond);
-	/* NOTREACHED */
-}
-
-
-void
-error(const char *msg, ...)
-{
-	va_list ap;
-
-	va_start(ap, msg);
-	exverror(EXERROR, msg, ap);
-	/* NOTREACHED */
-	va_end(ap);
-}
-
-
-void
-exerror(int cond, const char *msg, ...)
-{
-	va_list ap;
-
-	va_start(ap, msg);
-	exverror(cond, msg, ap);
-	/* NOTREACHED */
-	va_end(ap);
-}
-
-/*
- * error/warning routines for external builtins
- */
-
-void
-sh_exit(int rval)
-{
-	exerrno = rval & 255;
-	exraise(EXEXEC);
-}
-
-void
-sh_err(int status, const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	exvwarning(errno, fmt, ap);
-	va_end(ap);
-	sh_exit(status);
-}
-
-void
-sh_verr(int status, const char *fmt, va_list ap)
-{
-	exvwarning(errno, fmt, ap);
-	sh_exit(status);
-}
-
-void
-sh_errx(int status, const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	exvwarning(-1, fmt, ap);
-	va_end(ap);
-	sh_exit(status);
-}
-
-void
-sh_verrx(int status, const char *fmt, va_list ap)
-{
-	exvwarning(-1, fmt, ap);
-	sh_exit(status);
-}
-
-void
-sh_warn(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	exvwarning(errno, fmt, ap);
-	va_end(ap);
-}
-
-void
-sh_vwarn(const char *fmt, va_list ap)
-{
-	exvwarning(errno, fmt, ap);
-}
-
-void
-sh_warnx(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	exvwarning(-1, fmt, ap);
-	va_end(ap);
-}
-
-void
-sh_vwarnx(const char *fmt, va_list ap)
-{
-	exvwarning(-1, fmt, ap);
-}
-
-
-/*
- * Table of error messages.
- */
-
-struct errname {
-	short errcode;		/* error number */
-	short action;		/* operation which encountered the error */
-	const char *msg;	/* text describing the error */
-};
-
-
-#define ALL (E_OPEN|E_CREAT|E_EXEC)
-
-STATIC const struct errname errormsg[] = {
-	{ EINTR,	ALL,	"interrupted" },
-	{ EACCES,	ALL,	"permission denied" },
-	{ EIO,		ALL,	"I/O error" },
-	{ EEXIST,	ALL,	"file exists" },
-	{ ENOENT,	E_OPEN,	"no such file" },
-	{ ENOENT,	E_CREAT,"directory nonexistent" },
-	{ ENOENT,	E_EXEC,	"not found" },
-	{ ENOTDIR,	E_OPEN,	"no such file" },
-	{ ENOTDIR,	E_CREAT,"directory nonexistent" },
-	{ ENOTDIR,	E_EXEC,	"not found" },
-	{ EISDIR,	ALL,	"is a directory" },
-#ifdef EMFILE
-	{ EMFILE,	ALL,	"too many open files" },
-#endif
-	{ ENFILE,	ALL,	"file table overflow" },
-	{ ENOSPC,	ALL,	"file system full" },
-#ifdef EDQUOT
-	{ EDQUOT,	ALL,	"disk quota exceeded" },
-#endif
-#ifdef ENOSR
-	{ ENOSR,	ALL,	"no streams resources" },
-#endif
-	{ ENXIO,	ALL,	"no such device or address" },
-	{ EROFS,	ALL,	"read-only file system" },
-	{ ETXTBSY,	ALL,	"text busy" },
-#ifdef EAGAIN
-	{ EAGAIN,	E_EXEC,	"not enough memory" },
-#endif
-	{ ENOMEM,	ALL,	"not enough memory" },
-#ifdef ENOLINK
-	{ ENOLINK,	ALL,	"remote access failed" },
-#endif
-#ifdef EMULTIHOP
-	{ EMULTIHOP,	ALL,	"remote access failed" },
-#endif
-#ifdef ECOMM
-	{ ECOMM,	ALL,	"remote access failed" },
-#endif
-#ifdef ESTALE
-	{ ESTALE,	ALL,	"remote access failed" },
-#endif
-#ifdef ETIMEDOUT
-	{ ETIMEDOUT,	ALL,	"remote access failed" },
-#endif
-#ifdef ELOOP
-	{ ELOOP,	ALL,	"symbolic link loop" },
-#endif
-	{ E2BIG,	E_EXEC,	"argument list too long" },
-#ifdef ELIBACC
-	{ ELIBACC,	E_EXEC,	"shared library missing" },
-#endif
-	{ 0,		0,	NULL },
-};
-
-
-/*
- * Return a string describing an error.  The returned string may be a
- * pointer to a static buffer that will be overwritten on the next call.
- * Action describes the operation that got the error.
- */
-
-const char *
-errmsg(int e, int action)
-{
-	struct errname const *ep;
-	static char buf[12];
-
-	for (ep = errormsg ; ep->errcode ; ep++) {
-		if (ep->errcode == e && (ep->action & action) != 0)
-			return ep->msg;
-	}
-	fmtstr(buf, sizeof buf, "error %d", e);
-	return buf;
-}
diff --git a/sh/error.h b/sh/error.h
deleted file mode 100644
index 8e70ca4..0000000
--- a/sh/error.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/*	$NetBSD: error.h,v 1.16 2003/08/07 09:05:30 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)error.h	8.2 (Berkeley) 5/4/95
- */
-
-#include <stdarg.h>
-
-/*
- * Types of operations (passed to the errmsg routine).
- */
-
-#define E_OPEN 01	/* opening a file */
-#define E_CREAT 02	/* creating a file */
-#define E_EXEC 04	/* executing a program */
-
-
-/*
- * We enclose jmp_buf in a structure so that we can declare pointers to
- * jump locations.  The global variable handler contains the location to
- * jump to when an exception occurs, and the global variable exception
- * contains a code identifying the exeception.  To implement nested
- * exception handlers, the user should save the value of handler on entry
- * to an inner scope, set handler to point to a jmploc structure for the
- * inner scope, and restore handler on exit from the scope.
- */
-
-#include <setjmp.h>
-
-struct jmploc {
-	jmp_buf loc;
-};
-
-extern struct jmploc *handler;
-extern int exception;
-extern int exerrno;	/* error for EXEXEC */
-
-/* exceptions */
-#define EXINT 0		/* SIGINT received */
-#define EXERROR 1	/* a generic error */
-#define EXSHELLPROC 2	/* execute a shell procedure */
-#define EXEXEC 3	/* command execution failed */
-
-
-/*
- * These macros allow the user to suspend the handling of interrupt signals
- * over a period of time.  This is similar to SIGHOLD to or sigblock, but
- * much more efficient and portable.  (But hacking the kernel is so much
- * more fun than worrying about efficiency and portability. :-))
- */
-
-extern volatile int suppressint;
-extern volatile int intpending;
-
-#define INTOFF suppressint++
-#define INTON { if (--suppressint == 0 && intpending) onint(); }
-#define FORCEINTON {suppressint = 0; if (intpending) onint();}
-#define CLEAR_PENDING_INT intpending = 0
-#define int_pending() intpending
-
-void exraise(int) __attribute__((__noreturn__));
-void onint(void);
-void error(const char *, ...) __attribute__((__noreturn__));
-void exerror(int, const char *, ...) __attribute__((__noreturn__));
-const char *errmsg(int, int);
-
-void sh_err(int, const char *, ...) __attribute__((__noreturn__));
-void sh_verr(int, const char *, va_list) __attribute__((__noreturn__));
-void sh_errx(int, const char *, ...) __attribute__((__noreturn__));
-void sh_verrx(int, const char *, va_list) __attribute__((__noreturn__));
-void sh_warn(const char *, ...);
-void sh_vwarn(const char *, va_list);
-void sh_warnx(const char *, ...);
-void sh_vwarnx(const char *, va_list);
-
-void sh_exit(int) __attribute__((__noreturn__));
-
-
-/*
- * BSD setjmp saves the signal mask, which violates ANSI C and takes time,
- * so we use _setjmp instead.
- */
-
-#if defined(BSD) && !defined(__SVR4) && !defined(__linux__)
-#define setjmp(jmploc)	_setjmp(jmploc)
-#define longjmp(jmploc, val)	_longjmp(jmploc, val)
-#endif
diff --git a/sh/eval.c b/sh/eval.c
deleted file mode 100644
index 4eb7ded..0000000
--- a/sh/eval.c
+++ /dev/null
@@ -1,1257 +0,0 @@
-/*	$NetBSD: eval.c,v 1.81.2.1 2005/06/13 22:03:51 tron Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)eval.c	8.9 (Berkeley) 6/8/95";
-#else
-__RCSID("$NetBSD: eval.c,v 1.81.2.1 2005/06/13 22:03:51 tron Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-#include <signal.h>
-#include <stdio.h>
-#include <unistd.h>
-#ifdef __linux__
-#include <fcntl.h>
-#else
-#include <sys/fcntl.h>
-#endif
-#include <sys/times.h>
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-/*
- * Evaluate a command.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "syntax.h"
-#include "expand.h"
-#include "parser.h"
-#include "jobs.h"
-#include "eval.h"
-#include "builtins.h"
-#include "options.h"
-#include "exec.h"
-#include "redir.h"
-#include "input.h"
-#include "output.h"
-#include "trap.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "show.h"
-#include "mystring.h"
-#include "main.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-
-
-/* flags in argument to evaltree */
-#define EV_EXIT 01		/* exit after evaluating tree */
-#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
-#define EV_BACKCMD 04		/* command executing within back quotes */
-
-int evalskip;			/* set if we are skipping commands */
-STATIC int skipcount;		/* number of levels to skip */
-MKINIT int loopnest;		/* current loop nesting level */
-int funcnest;			/* depth of function calls */
-
-
-char *commandname;
-struct strlist *cmdenviron;
-int exitstatus;			/* exit status of last command */
-int back_exitstatus;		/* exit status of backquoted command */
-
-
-STATIC void evalloop(union node *, int);
-STATIC void evalfor(union node *, int);
-STATIC void evalcase(union node *, int);
-STATIC void evalsubshell(union node *, int);
-STATIC void expredir(union node *);
-STATIC void evalpipe(union node *);
-STATIC void evalcommand(union node *, int, struct backcmd *);
-STATIC void prehash(union node *);
-
-
-/*
- * Called to reset things after an exception.
- */
-
-#ifdef mkinit
-INCLUDE "eval.h"
-
-RESET {
-	evalskip = 0;
-	loopnest = 0;
-	funcnest = 0;
-}
-
-SHELLPROC {
-	exitstatus = 0;
-}
-#endif
-
-static int
-sh_pipe(int fds[2])
-{
-	int nfd;
-
-	if (pipe(fds))
-		return -1;
-
-	if (fds[0] < 3) {
-		nfd = fcntl(fds[0], F_DUPFD, 3);
-		if (nfd != -1) {
-			close(fds[0]);
-			fds[0] = nfd;
-		}
-	}
-
-	if (fds[1] < 3) {
-		nfd = fcntl(fds[1], F_DUPFD, 3);
-		if (nfd != -1) {
-			close(fds[1]);
-			fds[1] = nfd;
-		}
-	}
-	return 0;
-}
-
-
-/*
- * The eval commmand.
- */
-
-int
-evalcmd(int argc, char **argv)
-{
-        char *p;
-        char *concat;
-        char **ap;
-
-        if (argc > 1) {
-                p = argv[1];
-                if (argc > 2) {
-                        STARTSTACKSTR(concat);
-                        ap = argv + 2;
-                        for (;;) {
-                                while (*p)
-                                        STPUTC(*p++, concat);
-                                if ((p = *ap++) == NULL)
-                                        break;
-                                STPUTC(' ', concat);
-                        }
-                        STPUTC('\0', concat);
-                        p = grabstackstr(concat);
-                }
-                evalstring(p, EV_TESTED);
-        }
-        return exitstatus;
-}
-
-
-/*
- * Execute a command or commands contained in a string.
- */
-
-void
-evalstring(char *s, int flag)
-{
-	union node *n;
-	struct stackmark smark;
-
-	setstackmark(&smark);
-	setinputstring(s, 1);
-
-	while ((n = parsecmd(0)) != NEOF) {
-		evaltree(n, flag);
-		popstackmark(&smark);
-	}
-	popfile();
-	popstackmark(&smark);
-}
-
-
-
-/*
- * Evaluate a parse tree.  The value is left in the global variable
- * exitstatus.
- */
-
-void
-evaltree(union node *n, int flags)
-{
-	if (n == NULL) {
-		TRACE(("evaltree(NULL) called\n"));
-		exitstatus = 0;
-		goto out;
-	}
-#ifdef WITH_HISTORY
-	displayhist = 1;	/* show history substitutions done with fc */
-#endif
-	TRACE(("pid %d, evaltree(%p: %d, %d) called\n",
-	    getpid(), n, n->type, flags));
-	switch (n->type) {
-	case NSEMI:
-		evaltree(n->nbinary.ch1, flags & EV_TESTED);
-		if (evalskip)
-			goto out;
-		evaltree(n->nbinary.ch2, flags);
-		break;
-	case NAND:
-		evaltree(n->nbinary.ch1, EV_TESTED);
-		if (evalskip || exitstatus != 0)
-			goto out;
-		evaltree(n->nbinary.ch2, flags);
-		break;
-	case NOR:
-		evaltree(n->nbinary.ch1, EV_TESTED);
-		if (evalskip || exitstatus == 0)
-			goto out;
-		evaltree(n->nbinary.ch2, flags);
-		break;
-	case NREDIR:
-		expredir(n->nredir.redirect);
-		redirect(n->nredir.redirect, REDIR_PUSH);
-		evaltree(n->nredir.n, flags);
-		popredir();
-		break;
-	case NSUBSHELL:
-		evalsubshell(n, flags);
-		break;
-	case NBACKGND:
-		evalsubshell(n, flags);
-		break;
-	case NIF: {
-		evaltree(n->nif.test, EV_TESTED);
-		if (evalskip)
-			goto out;
-		if (exitstatus == 0)
-			evaltree(n->nif.ifpart, flags);
-		else if (n->nif.elsepart)
-			evaltree(n->nif.elsepart, flags);
-		else
-			exitstatus = 0;
-		break;
-	}
-	case NWHILE:
-	case NUNTIL:
-		evalloop(n, flags);
-		break;
-	case NFOR:
-		evalfor(n, flags);
-		break;
-	case NCASE:
-		evalcase(n, flags);
-		break;
-	case NDEFUN:
-		defun(n->narg.text, n->narg.next);
-		exitstatus = 0;
-		break;
-	case NNOT:
-		evaltree(n->nnot.com, EV_TESTED);
-		exitstatus = !exitstatus;
-		break;
-	case NPIPE:
-		evalpipe(n);
-		break;
-	case NCMD:
-		evalcommand(n, flags, (struct backcmd *)NULL);
-		break;
-	default:
-		out1fmt("Node type = %d\n", n->type);
-		flushout(&output);
-		break;
-	}
-out:
-	if (pendingsigs)
-		dotrap();
-	if ((flags & EV_EXIT) != 0)
-		exitshell(exitstatus);
-}
-
-
-STATIC void
-evalloop(union node *n, int flags)
-{
-	int status;
-
-	loopnest++;
-	status = 0;
-	for (;;) {
-		evaltree(n->nbinary.ch1, EV_TESTED);
-		if (evalskip) {
-skipping:	  if (evalskip == SKIPCONT && --skipcount <= 0) {
-				evalskip = 0;
-				continue;
-			}
-			if (evalskip == SKIPBREAK && --skipcount <= 0)
-				evalskip = 0;
-			break;
-		}
-		if (n->type == NWHILE) {
-			if (exitstatus != 0)
-				break;
-		} else {
-			if (exitstatus == 0)
-				break;
-		}
-		evaltree(n->nbinary.ch2, flags & EV_TESTED);
-		status = exitstatus;
-		if (evalskip)
-			goto skipping;
-	}
-	loopnest--;
-	exitstatus = status;
-}
-
-
-
-STATIC void
-evalfor(union node *n, int flags)
-{
-	struct arglist arglist;
-	union node *argp;
-	struct strlist *sp;
-	struct stackmark smark;
-	int status = 0;
-
-	setstackmark(&smark);
-	arglist.lastp = &arglist.list;
-	for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
-		expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
-		if (evalskip)
-			goto out;
-	}
-	*arglist.lastp = NULL;
-
-	loopnest++;
-	for (sp = arglist.list ; sp ; sp = sp->next) {
-		setvar(n->nfor.var, sp->text, 0);
-		evaltree(n->nfor.body, flags & EV_TESTED);
-		status = exitstatus;
-		if (evalskip) {
-			if (evalskip == SKIPCONT && --skipcount <= 0) {
-				evalskip = 0;
-				continue;
-			}
-			if (evalskip == SKIPBREAK && --skipcount <= 0)
-				evalskip = 0;
-			break;
-		}
-	}
-	loopnest--;
-	exitstatus = status;
-out:
-	popstackmark(&smark);
-}
-
-
-
-STATIC void
-evalcase(union node *n, int flags)
-{
-	union node *cp;
-	union node *patp;
-	struct arglist arglist;
-	struct stackmark smark;
-	int status = 0;
-
-	setstackmark(&smark);
-	arglist.lastp = &arglist.list;
-	expandarg(n->ncase.expr, &arglist, EXP_TILDE);
-	for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
-		for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
-			if (casematch(patp, arglist.list->text)) {
-				if (evalskip == 0) {
-					evaltree(cp->nclist.body, flags);
-					status = exitstatus;
-				}
-				goto out;
-			}
-		}
-	}
-out:
-	exitstatus = status;
-	popstackmark(&smark);
-}
-
-
-
-/*
- * Kick off a subshell to evaluate a tree.
- */
-
-STATIC void
-evalsubshell(union node *n, int flags)
-{
-	struct job *jp;
-	int backgnd = (n->type == NBACKGND);
-
-	expredir(n->nredir.redirect);
-	INTOFF;
-	jp = makejob(n, 1);
-	if (forkshell(jp, n, backgnd) == 0) {
-		INTON;
-		if (backgnd)
-			flags &=~ EV_TESTED;
-		redirect(n->nredir.redirect, 0);
-		/* never returns */
-		evaltree(n->nredir.n, flags | EV_EXIT);
-	}
-	if (! backgnd)
-		exitstatus = waitforjob(jp);
-	INTON;
-}
-
-
-
-/*
- * Compute the names of the files in a redirection list.
- */
-
-STATIC void
-expredir(union node *n)
-{
-	union node *redir;
-
-	for (redir = n ; redir ; redir = redir->nfile.next) {
-		struct arglist fn;
-		fn.lastp = &fn.list;
-		switch (redir->type) {
-		case NFROMTO:
-		case NFROM:
-		case NTO:
-		case NCLOBBER:
-		case NAPPEND:
-			expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
-			redir->nfile.expfname = fn.list->text;
-			break;
-		case NFROMFD:
-		case NTOFD:
-			if (redir->ndup.vname) {
-				expandarg(redir->ndup.vname, &fn, EXP_FULL | EXP_TILDE);
-				fixredir(redir, fn.list->text, 1);
-			}
-			break;
-		}
-	}
-}
-
-
-
-/*
- * Evaluate a pipeline.  All the processes in the pipeline are children
- * of the process creating the pipeline.  (This differs from some versions
- * of the shell, which make the last process in a pipeline the parent
- * of all the rest.)
- */
-
-STATIC void
-evalpipe(union node *n)
-{
-	struct job *jp;
-	struct nodelist *lp;
-	int pipelen;
-	int prevfd;
-	int pip[2];
-
-	TRACE(("evalpipe(0x%lx) called\n", (long)n));
-	pipelen = 0;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
-		pipelen++;
-	INTOFF;
-	jp = makejob(n, pipelen);
-	prevfd = -1;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-		prehash(lp->n);
-		pip[1] = -1;
-		if (lp->next) {
-			if (sh_pipe(pip) < 0) {
-				close(prevfd);
-				error("Pipe call failed");
-			}
-		}
-		if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
-			INTON;
-			if (prevfd > 0) {
-				close(0);
-				copyfd(prevfd, 0);
-				close(prevfd);
-			}
-			if (pip[1] >= 0) {
-				close(pip[0]);
-				if (pip[1] != 1) {
-					close(1);
-					copyfd(pip[1], 1);
-					close(pip[1]);
-				}
-			}
-			evaltree(lp->n, EV_EXIT);
-		}
-		if (prevfd >= 0)
-			close(prevfd);
-		prevfd = pip[0];
-		close(pip[1]);
-	}
-	if (n->npipe.backgnd == 0) {
-		exitstatus = waitforjob(jp);
-		TRACE(("evalpipe:  job done exit status %d\n", exitstatus));
-	}
-	INTON;
-}
-
-
-
-/*
- * Execute a command inside back quotes.  If it's a builtin command, we
- * want to save its output in a block obtained from malloc.  Otherwise
- * we fork off a subprocess and get the output of the command via a pipe.
- * Should be called with interrupts off.
- */
-
-void
-evalbackcmd(union node *n, struct backcmd *result)
-{
-	int pip[2];
-	struct job *jp;
-	struct stackmark smark;		/* unnecessary */
-
-	setstackmark(&smark);
-	result->fd = -1;
-	result->buf = NULL;
-	result->nleft = 0;
-	result->jp = NULL;
-	if (n == NULL) {
-		goto out;
-	}
-#ifdef notyet
-	/*
-	 * For now we disable executing builtins in the same
-	 * context as the shell, because we are not keeping
-	 * enough state to recover from changes that are
-	 * supposed only to affect subshells. eg. echo "`cd /`"
-	 */
-	if (n->type == NCMD) {
-		exitstatus = oexitstatus;
-		evalcommand(n, EV_BACKCMD, result);
-	} else
-#endif
-	{
-		INTOFF;
-		if (sh_pipe(pip) < 0)
-			error("Pipe call failed");
-		jp = makejob(n, 1);
-		if (forkshell(jp, n, FORK_NOJOB) == 0) {
-			FORCEINTON;
-			close(pip[0]);
-			if (pip[1] != 1) {
-				close(1);
-				copyfd(pip[1], 1);
-				close(pip[1]);
-			}
-			eflag = 0;
-			evaltree(n, EV_EXIT);
-			/* NOTREACHED */
-		}
-		close(pip[1]);
-		result->fd = pip[0];
-		result->jp = jp;
-		INTON;
-	}
-out:
-	popstackmark(&smark);
-	TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
-		result->fd, result->buf, result->nleft, result->jp));
-}
-
-static const char *
-syspath(void)
-{
-	static char *sys_path = NULL;
-#ifndef __linux__    
-	static int mib[] = {CTL_USER, USER_CS_PATH};
-#endif
-	static char def_path[] = "PATH=/usr/bin:/bin:/usr/sbin:/sbin";
-
-	if (sys_path == NULL) {
-#ifndef __linux__
-		size_t len;
-		if (sysctl(mib, 2, 0, &len, 0, 0) != -1 &&
-		    (sys_path = ckmalloc(len + 5)) != NULL &&
-		    sysctl(mib, 2, sys_path + 5, &len, 0, 0) != -1) {
-			memcpy(sys_path, "PATH=", 5);
-		} else
-#endif
-		{
-			ckfree(sys_path);
-			/* something to keep things happy */
-			sys_path = def_path;
-		}
-	}
-	return sys_path;
-}
-
-static int
-parse_command_args(int argc, char **argv, int *use_syspath)
-{
-	int sv_argc = argc;
-	char *cp, c;
-
-	*use_syspath = 0;
-
-	for (;;) {
-		argv++;
-		if (--argc == 0)
-			break;
-		cp = *argv;
-		if (*cp++ != '-')
-			break;
-		if (*cp == '-' && cp[1] == 0) {
-			argv++;
-			argc--;
-			break;
-		}
-		while ((c = *cp++)) {
-			switch (c) {
-			case 'p':
-				*use_syspath = 1;
-				break;
-			default:
-				/* run 'typecmd' for other options */
-				return 0;
-			}
-		}
-	}
-	return sv_argc - argc;
-}
-
-int vforked = 0;
-
-/*
- * Execute a simple command.
- */
-
-STATIC void
-evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
-{
-	struct stackmark smark;
-	union node *argp;
-	struct arglist arglist;
-	struct arglist varlist;
-	char **argv;
-	int argc;
-	char **envp;
-	int varflag;
-	struct strlist *sp;
-	int mode;
-	int pip[2];
-	struct cmdentry cmdentry;
-	struct job *jp;
-	struct jmploc jmploc;
-	struct jmploc *volatile savehandler = 0;
-	char *volatile savecmdname;
-	volatile struct shparam saveparam;
-	struct localvar *volatile savelocalvars;
-	volatile int e;
-	char *lastarg;
-	const char *path = pathval();
-	volatile int temp_path = 0;
-#if __GNUC__
-	/* Avoid longjmp clobbering */
-	(void) &argv;
-	(void) &argc;
-	(void) &lastarg;
-	(void) &flags;
-#endif
-
-	vforked = 0;
-	/* First expand the arguments. */
-	TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags));
-	setstackmark(&smark);
-	back_exitstatus = 0;
-
-	arglist.lastp = &arglist.list;
-	varflag = 1;
-	/* Expand arguments, ignoring the initial 'name=value' ones */
-	for (argp = cmd->ncmd.args ; argp ; argp = argp->narg.next) {
-		char *p = argp->narg.text;
-		if (varflag && is_name(*p)) {
-			do {
-				p++;
-			} while (is_in_name(*p));
-			if (*p == '=')
-				continue;
-		}
-		expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
-		varflag = 0;
-	}
-	*arglist.lastp = NULL;
-
-	expredir(cmd->ncmd.redirect);
-
-	/* Now do the initial 'name=value' ones we skipped above */
-	varlist.lastp = &varlist.list;
-	for (argp = cmd->ncmd.args ; argp ; argp = argp->narg.next) {
-		char *p = argp->narg.text;
-		if (!is_name(*p))
-			break;
-		do
-			p++;
-		while (is_in_name(*p));
-		if (*p != '=')
-			break;
-		expandarg(argp, &varlist, EXP_VARTILDE);
-	}
-	*varlist.lastp = NULL;
-
-	argc = 0;
-	for (sp = arglist.list ; sp ; sp = sp->next)
-		argc++;
-	argv = stalloc(sizeof (char *) * (argc + 1));
-
-	for (sp = arglist.list ; sp ; sp = sp->next) {
-		TRACE(("evalcommand arg: %s\n", sp->text));
-		*argv++ = sp->text;
-	}
-	*argv = NULL;
-	lastarg = NULL;
-	if (iflag && funcnest == 0 && argc > 0)
-		lastarg = argv[-1];
-	argv -= argc;
-
-	/* Print the command if xflag is set. */
-	if (xflag) {
-		char sep = 0;
-		out2str(ps4val());
-		for (sp = varlist.list ; sp ; sp = sp->next) {
-			if (sep != 0)
-				outc(sep, &errout);
-			out2str(sp->text);
-			sep = ' ';
-		}
-		for (sp = arglist.list ; sp ; sp = sp->next) {
-			if (sep != 0)
-				outc(sep, &errout);
-			out2str(sp->text);
-			sep = ' ';
-		}
-		outc('\n', &errout);
-		flushout(&errout);
-	}
-
-	/* Now locate the command. */
-	if (argc == 0) {
-		cmdentry.cmdtype = CMDSPLBLTIN;
-		cmdentry.u.bltin = bltincmd;
-	} else {
-		static const char PATH[] = "PATH=";
-		int cmd_flags = DO_ERR;
-
-		/*
-		 * Modify the command lookup path, if a PATH= assignment
-		 * is present
-		 */
-		for (sp = varlist.list; sp; sp = sp->next)
-			if (strncmp(sp->text, PATH, sizeof(PATH) - 1) == 0)
-				path = sp->text + sizeof(PATH) - 1;
-
-		do {
-			int argsused, use_syspath;
-			find_command(argv[0], &cmdentry, cmd_flags, path);
-			if (cmdentry.cmdtype == CMDUNKNOWN) {
-				exitstatus = 127;
-				flushout(&errout);
-				goto out;
-			}
-
-			/* implement the 'command' builtin here */
-			if (cmdentry.cmdtype != CMDBUILTIN ||
-			    cmdentry.u.bltin != bltincmd)
-				break;
-			cmd_flags |= DO_NOFUNC;
-			argsused = parse_command_args(argc, argv, &use_syspath);
-			if (argsused == 0) {
-				/* use 'type' builting to display info */
-				cmdentry.u.bltin = typecmd;
-				break;
-			}
-			argc -= argsused;
-			argv += argsused;
-			if (use_syspath)
-				path = syspath() + 5;
-		} while (argc != 0);
-		if (cmdentry.cmdtype == CMDSPLBLTIN && cmd_flags & DO_NOFUNC)
-			/* posix mandates that 'command <splbltin>' act as if
-			   <splbltin> was a normal builtin */
-			cmdentry.cmdtype = CMDBUILTIN;
-	}
-
-	/* Fork off a child process if necessary. */
-	if (cmd->ncmd.backgnd
-	 || (cmdentry.cmdtype == CMDNORMAL && (flags & EV_EXIT) == 0)
-	 || ((flags & EV_BACKCMD) != 0
-	    && ((cmdentry.cmdtype != CMDBUILTIN && cmdentry.cmdtype != CMDSPLBLTIN)
-		 || cmdentry.u.bltin == dotcmd
-		 || cmdentry.u.bltin == evalcmd))) {
-		INTOFF;
-		jp = makejob(cmd, 1);
-		mode = cmd->ncmd.backgnd;
-		if (flags & EV_BACKCMD) {
-			mode = FORK_NOJOB;
-			if (sh_pipe(pip) < 0)
-				error("Pipe call failed");
-		}
-#ifdef DO_SHAREDVFORK
-		/* It is essential that if DO_SHAREDVFORK is defined that the
-		 * child's address space is actually shared with the parent as
-		 * we rely on this.
-		 */
-		if (cmdentry.cmdtype == CMDNORMAL) {
-			pid_t	pid;
-
-			savelocalvars = localvars;
-			localvars = NULL;
-			vforked = 1;
-			switch (pid = vfork()) {
-			case -1:
-				TRACE(("Vfork failed, errno=%d\n", errno));
-				INTON;
-				error("Cannot vfork");
-				break;
-			case 0:
-				/* Make sure that exceptions only unwind to
-				 * after the vfork(2)
-				 */
-				if (setjmp(jmploc.loc)) {
-					if (exception == EXSHELLPROC) {
-						/* We can't progress with the vfork,
-						 * so, set vforked = 2 so the parent
-						 * knows, and _exit();
-						 */
-						vforked = 2;
-						_exit(0);
-					} else {
-						_exit(exerrno);
-					}
-				}
-				savehandler = handler;
-				handler = &jmploc;
-				listmklocal(varlist.list, VEXPORT | VNOFUNC);
-				forkchild(jp, cmd, mode, vforked);
-				break;
-			default:
-				handler = savehandler;	/* restore from vfork(2) */
-				poplocalvars();
-				localvars = savelocalvars;
-				if (vforked == 2) {
-					vforked = 0;
-
-					(void)waitpid(pid, NULL, 0);
-					/* We need to progress in a normal fork fashion */
-					goto normal_fork;
-				}
-				vforked = 0;
-				forkparent(jp, cmd, mode, pid);
-				goto parent;
-			}
-		} else {
-normal_fork:
-#endif
-			if (forkshell(jp, cmd, mode) != 0)
-				goto parent;	/* at end of routine */
-			FORCEINTON;
-#ifdef DO_SHAREDVFORK
-		}
-#endif
-		if (flags & EV_BACKCMD) {
-			if (!vforked) {
-				FORCEINTON;
-			}
-			close(pip[0]);
-			if (pip[1] != 1) {
-				close(1);
-				copyfd(pip[1], 1);
-				close(pip[1]);
-			}
-		}
-		flags |= EV_EXIT;
-	}
-
-	/* This is the child process if a fork occurred. */
-	/* Execute the command. */
-	switch (cmdentry.cmdtype) {
-	case CMDFUNCTION:
-#ifdef DEBUG
-		trputs("Shell function:  ");  trargs(argv);
-#endif
-		redirect(cmd->ncmd.redirect, REDIR_PUSH);
-		saveparam = shellparam;
-		shellparam.malloc = 0;
-		shellparam.reset = 1;
-		shellparam.nparam = argc - 1;
-		shellparam.p = argv + 1;
-		shellparam.optnext = NULL;
-		INTOFF;
-		savelocalvars = localvars;
-		localvars = NULL;
-		INTON;
-		if (setjmp(jmploc.loc)) {
-			if (exception == EXSHELLPROC) {
-				freeparam((volatile struct shparam *)
-				    &saveparam);
-			} else {
-				freeparam(&shellparam);
-				shellparam = saveparam;
-			}
-			poplocalvars();
-			localvars = savelocalvars;
-			handler = savehandler;
-			longjmp(handler->loc, 1);
-		}
-		savehandler = handler;
-		handler = &jmploc;
-		listmklocal(varlist.list, 0);
-		/* stop shell blowing its stack */
-		if (++funcnest > 1000)
-			error("too many nested function calls");
-		evaltree(cmdentry.u.func, flags & EV_TESTED);
-		funcnest--;
-		INTOFF;
-		poplocalvars();
-		localvars = savelocalvars;
-		freeparam(&shellparam);
-		shellparam = saveparam;
-		handler = savehandler;
-		popredir();
-		INTON;
-		if (evalskip == SKIPFUNC) {
-			evalskip = 0;
-			skipcount = 0;
-		}
-		if (flags & EV_EXIT)
-			exitshell(exitstatus);
-		break;
-
-	case CMDBUILTIN:
-	case CMDSPLBLTIN:
-#ifdef DEBUG
-		trputs("builtin command:  ");  trargs(argv);
-#endif
-		mode = (cmdentry.u.bltin == execcmd) ? 0 : REDIR_PUSH;
-		if (flags == EV_BACKCMD) {
-			memout.nleft = 0;
-			memout.nextc = memout.buf;
-			memout.bufsize = 64;
-			mode |= REDIR_BACKQ;
-		}
-		e = -1;
-		savehandler = handler;
-		savecmdname = commandname;
-		handler = &jmploc;
-		if (!setjmp(jmploc.loc)) {
-			/* We need to ensure the command hash table isn't
-			 * corruped by temporary PATH assignments.
-			 * However we must ensure the 'local' command works!
-			 */
-			if (path != pathval() && (cmdentry.u.bltin == hashcmd ||
-			    cmdentry.u.bltin == typecmd)) {
-				savelocalvars = localvars;
-				localvars = 0;
-				mklocal(path - 5 /* PATH= */, 0);
-				temp_path = 1;
-			} else
-				temp_path = 0;
-			redirect(cmd->ncmd.redirect, mode);
-
-			/* exec is a special builtin, but needs this list... */
-			cmdenviron = varlist.list;
-			/* we must check 'readonly' flag for all builtins */
-			listsetvar(varlist.list,
-				cmdentry.cmdtype == CMDSPLBLTIN ? 0 : VNOSET);
-			commandname = argv[0];
-			/* initialize nextopt */
-			argptr = argv + 1;
-			optptr = NULL;
-			/* and getopt */
-#ifndef __linux__
-			optreset = 1;
-#endif
-			optind = 1;
-			exitstatus = cmdentry.u.bltin(argc, argv);
-		} else {
-			e = exception;
-			exitstatus = e == EXINT ? SIGINT + 128 :
-					e == EXEXEC ? exerrno : 2;
-		}
-		handler = savehandler;
-		flushall();
-		out1 = &output;
-		out2 = &errout;
-		freestdout();
-		if (temp_path) {
-			poplocalvars();
-			localvars = savelocalvars;
-		}
-		cmdenviron = NULL;
-		if (e != EXSHELLPROC) {
-			commandname = savecmdname;
-			if (flags & EV_EXIT)
-				exitshell(exitstatus);
-		}
-		if (e != -1) {
-			if ((e != EXERROR && e != EXEXEC)
-			    || cmdentry.cmdtype == CMDSPLBLTIN)
-				exraise(e);
-			FORCEINTON;
-		}
-		if (cmdentry.u.bltin != execcmd)
-			popredir();
-		if (flags == EV_BACKCMD) {
-			backcmd->buf = memout.buf;
-			backcmd->nleft = memout.nextc - memout.buf;
-			memout.buf = NULL;
-		}
-		break;
-
-	default:
-#ifdef DEBUG
-		trputs("normal command:  ");  trargs(argv);
-#endif
-		clearredir(vforked);
-		redirect(cmd->ncmd.redirect, vforked ? REDIR_VFORK : 0);
-		if (!vforked)
-			for (sp = varlist.list ; sp ; sp = sp->next)
-				setvareq(sp->text, VEXPORT|VSTACK);
-		envp = environment();
-		shellexec(argv, envp, path, cmdentry.u.index, vforked);
-		break;
-	}
-	goto out;
-
-parent:	/* parent process gets here (if we forked) */
-	if (mode == FORK_FG) {	/* argument to fork */
-		exitstatus = waitforjob(jp);
-	} else if (mode == FORK_NOJOB) {
-		backcmd->fd = pip[0];
-		close(pip[1]);
-		backcmd->jp = jp;
-	}
-	FORCEINTON;
-
-out:
-	if (lastarg)
-		/* dsl: I think this is intended to be used to support
-		 * '_' in 'vi' command mode during line editing...
-		 * However I implemented that within libedit itself.
-		 */
-		setvar("_", lastarg, 0);
-	popstackmark(&smark);
-
-	if (eflag && exitstatus && !(flags & EV_TESTED))
-		exitshell(exitstatus);
-}
-
-
-/*
- * Search for a command.  This is called before we fork so that the
- * location of the command will be available in the parent as well as
- * the child.  The check for "goodname" is an overly conservative
- * check that the name will not be subject to expansion.
- */
-
-STATIC void
-prehash(union node *n)
-{
-	struct cmdentry entry;
-
-	if (n->type == NCMD && n->ncmd.args)
-		if (goodname(n->ncmd.args->narg.text))
-			find_command(n->ncmd.args->narg.text, &entry, 0,
-				     pathval());
-}
-
-
-
-/*
- * Builtin commands.  Builtin commands whose functions are closely
- * tied to evaluation are implemented here.
- */
-
-/*
- * No command given.
- */
-
-int
-bltincmd(int argc, char **argv)
-{
-	/*
-	 * Preserve exitstatus of a previous possible redirection
-	 * as POSIX mandates
-	 */
-	return back_exitstatus;
-}
-
-
-/*
- * Handle break and continue commands.  Break, continue, and return are
- * all handled by setting the evalskip flag.  The evaluation routines
- * above all check this flag, and if it is set they start skipping
- * commands rather than executing them.  The variable skipcount is
- * the number of loops to break/continue, or the number of function
- * levels to return.  (The latter is always 1.)  It should probably
- * be an error to break out of more loops than exist, but it isn't
- * in the standard shell so we don't make it one here.
- */
-
-int
-breakcmd(int argc, char **argv)
-{
-	int n = argc > 1 ? number(argv[1]) : 1;
-
-	if (n > loopnest)
-		n = loopnest;
-	if (n > 0) {
-		evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
-		skipcount = n;
-	}
-	return 0;
-}
-
-
-/*
- * The return command.
- */
-
-int
-returncmd(int argc, char **argv)
-{
-	int ret = argc > 1 ? number(argv[1]) : exitstatus;
-
-	if (funcnest) {
-		evalskip = SKIPFUNC;
-		skipcount = 1;
-		return ret;
-	}
-	else {
-		/* Do what ksh does; skip the rest of the file */
-		evalskip = SKIPFILE;
-		skipcount = 1;
-		return ret;
-	}
-}
-
-
-int
-falsecmd(int argc, char **argv)
-{
-	return 1;
-}
-
-
-int
-truecmd(int argc, char **argv)
-{
-	return 0;
-}
-
-
-int
-execcmd(int argc, char **argv)
-{
-	if (argc > 1) {
-		struct strlist *sp;
-
-		iflag = 0;		/* exit on error */
-		mflag = 0;
-		optschanged();
-		for (sp = cmdenviron; sp; sp = sp->next)
-			setvareq(sp->text, VEXPORT|VSTACK);
-		shellexec(argv + 1, environment(), pathval(), 0, 0);
-	}
-	return 0;
-}
-
-static int
-conv_time(clock_t ticks, char *seconds, size_t l)
-{
-	static clock_t tpm = 0;
-	clock_t mins;
-	int i;
-
-	mins = ticks / tpm;
-	snprintf(seconds, l, "%.4f", (ticks - mins * tpm) * 60.0 / tpm );
-
-	if (seconds[0] == '6' && seconds[1] == '0') {
-		/* 59.99995 got rounded up... */
-		mins++;
-		strlcpy(seconds, "0.0", l);
-		return mins;
-	}
-
-	/* suppress trailing zeros */
-	i = strlen(seconds) - 1;
-	for (; seconds[i] == '0' && seconds[i - 1] != '.'; i--)
-		seconds[i] = 0;
-	return mins;
-}
-
-int
-timescmd(int argc, char **argv)
-{
-	struct tms tms;
-	int u, s, cu, cs;
-	char us[8], ss[8], cus[8], css[8];
-
-	nextopt("");
-
-	times(&tms);
-
-	u = conv_time(tms.tms_utime, us, sizeof(us));
-	s = conv_time(tms.tms_stime, ss, sizeof(ss));
-	cu = conv_time(tms.tms_cutime, cus, sizeof(cus));
-	cs = conv_time(tms.tms_cstime, css, sizeof(css));
-
-	outfmt(out1, "%dm%ss %dm%ss\n%dm%ss %dm%ss\n",
-		u, us, s, ss, cu, cus, cs, css);
-
-	return 0;
-}
diff --git a/sh/eval.h b/sh/eval.h
deleted file mode 100644
index 155bc44..0000000
--- a/sh/eval.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/*	$NetBSD: eval.h,v 1.14 2003/08/07 09:05:31 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)eval.h	8.2 (Berkeley) 5/4/95
- */
-
-extern char *commandname;	/* currently executing command */
-extern int exitstatus;		/* exit status of last command */
-extern int back_exitstatus;	/* exit status of backquoted command */
-extern struct strlist *cmdenviron;  /* environment for builtin command */
-
-
-struct backcmd {		/* result of evalbackcmd */
-	int fd;			/* file descriptor to read from */
-	char *buf;		/* buffer */
-	int nleft;		/* number of chars in buffer */
-	struct job *jp;		/* job structure for command */
-};
-
-void evalstring(char *, int);
-union node;	/* BLETCH for ansi C */
-void evaltree(union node *, int);
-void evalbackcmd(union node *, struct backcmd *);
-
-/* in_function returns nonzero if we are currently evaluating a function */
-#define in_function()	funcnest
-extern int funcnest;
-extern int evalskip;
-
-/* reasons for skipping commands (see comment on breakcmd routine) */
-#define SKIPBREAK	1
-#define SKIPCONT	2
-#define SKIPFUNC	3
-#define SKIPFILE	4
diff --git a/sh/exec.c b/sh/exec.c
deleted file mode 100644
index fe3613f..0000000
--- a/sh/exec.c
+++ /dev/null
@@ -1,1063 +0,0 @@
-/*	$NetBSD: exec.c,v 1.37 2003/08/07 09:05:31 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)exec.c	8.4 (Berkeley) 6/8/95";
-#else
-__RCSID("$NetBSD: exec.c,v 1.37 2003/08/07 09:05:31 agc Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-/*
- * When commands are first encountered, they are entered in a hash table.
- * This ensures that a full path search will not have to be done for them
- * on each invocation.
- *
- * We should investigate converting to a linear search, even though that
- * would make the command name "hash" a misnomer.
- */
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"
-#include "parser.h"
-#include "redir.h"
-#include "eval.h"
-#include "exec.h"
-#include "builtins.h"
-#include "var.h"
-#include "options.h"
-#include "input.h"
-#include "output.h"
-#include "syntax.h"
-#include "memalloc.h"
-#include "error.h"
-#include "init.h"
-#include "mystring.h"
-#include "show.h"
-#include "jobs.h"
-#include "alias.h"
-
-
-#define CMDTABLESIZE 31		/* should be prime */
-#define ARB 1			/* actual size determined at run time */
-
-
-
-struct tblentry {
-	struct tblentry *next;	/* next entry in hash chain */
-	union param param;	/* definition of builtin function */
-	short cmdtype;		/* index identifying command */
-	char rehash;		/* if set, cd done since entry created */
-	char cmdname[ARB];	/* name of command */
-};
-
-
-STATIC struct tblentry *cmdtable[CMDTABLESIZE];
-STATIC int builtinloc = -1;		/* index in path of %builtin, or -1 */
-int exerrno = 0;			/* Last exec error */
-
-
-STATIC void tryexec(char *, char **, char **, int);
-STATIC void execinterp(char **, char **);
-STATIC void printentry(struct tblentry *, int);
-STATIC void clearcmdentry(int);
-STATIC struct tblentry *cmdlookup(const char *, int);
-STATIC void delete_cmd_entry(void);
-
-
-extern char *const parsekwd[];
-
-/*
- * Exec a program.  Never returns.  If you change this routine, you may
- * have to change the find_command routine as well.
- */
-
-void
-shellexec(char **argv, char **envp, const char *path, int idx, int vforked)
-{
-	char *cmdname;
-	int e;
-
-	if (strchr(argv[0], '/') != NULL) {
-		tryexec(argv[0], argv, envp, vforked);
-		e = errno;
-	} else {
-		e = ENOENT;
-		while ((cmdname = padvance(&path, argv[0])) != NULL) {
-			if (--idx < 0 && pathopt == NULL) {
-				tryexec(cmdname, argv, envp, vforked);
-				if (errno != ENOENT && errno != ENOTDIR)
-					e = errno;
-			}
-			stunalloc(cmdname);
-		}
-	}
-
-	/* Map to POSIX errors */
-	switch (e) {
-	case EACCES:
-		exerrno = 126;
-		break;
-	case ENOENT:
-		exerrno = 127;
-		break;
-	default:
-		exerrno = 2;
-		break;
-	}
-	TRACE(("shellexec failed for %s, errno %d, vforked %d, suppressint %d\n",
-		argv[0], e, vforked, suppressint ));
-	exerror(EXEXEC, "%s: %s", argv[0], errmsg(e, E_EXEC));
-	/* NOTREACHED */
-}
-
-
-STATIC void
-tryexec(char *cmd, char **argv, char **envp, int vforked)
-{
-	int e;
-#ifndef BSD
-	char *p;
-#endif
-
-#ifdef SYSV
-	do {
-		execve(cmd, argv, envp);
-	} while (errno == EINTR);
-#else
-	execve(cmd, argv, envp);
-#endif
-	e = errno;
-	if (e == ENOEXEC) {
-		if (vforked) {
-			/* We are currently vfork(2)ed, so raise an
-			 * exception, and evalcommand will try again
-			 * with a normal fork(2).
-			 */
-			exraise(EXSHELLPROC);
-		}
-		initshellproc();
-		setinputfile(cmd, 0);
-		commandname = arg0 = savestr(argv[0]);
-#if !defined(BSD) && !defined(__linux__)
-		pgetc(); pungetc();		/* fill up input buffer */
-		p = parsenextc;
-		if (parsenleft > 2 && p[0] == '#' && p[1] == '!') {
-			argv[0] = cmd;
-			execinterp(argv, envp);
-		}
-#endif
-		setparam(argv + 1);
-		exraise(EXSHELLPROC);
-	}
-	errno = e;
-}
-
-
-#if !defined(BSD) && !defined(__linux__)
-/*
- * Execute an interpreter introduced by "#!", for systems where this
- * feature has not been built into the kernel.  If the interpreter is
- * the shell, return (effectively ignoring the "#!").  If the execution
- * of the interpreter fails, exit.
- *
- * This code peeks inside the input buffer in order to avoid actually
- * reading any input.  It would benefit from a rewrite.
- */
-
-#define NEWARGS 5
-
-STATIC void
-execinterp(char **argv, char **envp)
-{
-	int n;
-	char *inp;
-	char *outp;
-	char c;
-	char *p;
-	char **ap;
-	char *newargs[NEWARGS];
-	int i;
-	char **ap2;
-	char **new;
-
-	n = parsenleft - 2;
-	inp = parsenextc + 2;
-	ap = newargs;
-	for (;;) {
-		while (--n >= 0 && (*inp == ' ' || *inp == '\t'))
-			inp++;
-		if (n < 0)
-			goto bad;
-		if ((c = *inp++) == '\n')
-			break;
-		if (ap == &newargs[NEWARGS])
-bad:		  error("Bad #! line");
-		STARTSTACKSTR(outp);
-		do {
-			STPUTC(c, outp);
-		} while (--n >= 0 && (c = *inp++) != ' ' && c != '\t' && c != '\n');
-		STPUTC('\0', outp);
-		n++, inp--;
-		*ap++ = grabstackstr(outp);
-	}
-	if (ap == newargs + 1) {	/* if no args, maybe no exec is needed */
-		p = newargs[0];
-		for (;;) {
-			if (equal(p, "sh") || equal(p, "ash")) {
-				return;
-			}
-			while (*p != '/') {
-				if (*p == '\0')
-					goto break2;
-				p++;
-			}
-			p++;
-		}
-break2:;
-	}
-	i = (char *)ap - (char *)newargs;		/* size in bytes */
-	if (i == 0)
-		error("Bad #! line");
-	for (ap2 = argv ; *ap2++ != NULL ; );
-	new = ckmalloc(i + ((char *)ap2 - (char *)argv));
-	ap = newargs, ap2 = new;
-	while ((i -= sizeof (char **)) >= 0)
-		*ap2++ = *ap++;
-	ap = argv;
-	while (*ap2++ = *ap++);
-	shellexec(new, envp, pathval(), 0);
-	/* NOTREACHED */
-}
-#endif
-
-
-
-/*
- * Do a path search.  The variable path (passed by reference) should be
- * set to the start of the path before the first call; padvance will update
- * this value as it proceeds.  Successive calls to padvance will return
- * the possible path expansions in sequence.  If an option (indicated by
- * a percent sign) appears in the path entry then the global variable
- * pathopt will be set to point to it; otherwise pathopt will be set to
- * NULL.
- */
-
-const char *pathopt;
-
-char *
-padvance(const char **path, const char *name)
-{
-	const char *p;
-	char *q;
-	const char *start;
-	int len;
-
-	if (*path == NULL)
-		return NULL;
-	start = *path;
-	for (p = start ; *p && *p != ':' && *p != '%' ; p++);
-	len = p - start + strlen(name) + 2;	/* "2" is for '/' and '\0' */
-	while (stackblocksize() < len)
-		growstackblock();
-	q = stackblock();
-	if (p != start) {
-		memcpy(q, start, p - start);
-		q += p - start;
-		*q++ = '/';
-	}
-	strcpy(q, name);
-	pathopt = NULL;
-	if (*p == '%') {
-		pathopt = ++p;
-		while (*p && *p != ':')  p++;
-	}
-	if (*p == ':')
-		*path = p + 1;
-	else
-		*path = NULL;
-	return stalloc(len);
-}
-
-
-
-/*** Command hashing code ***/
-
-
-int
-hashcmd(int argc, char **argv)
-{
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-	int c;
-	int verbose;
-	struct cmdentry entry;
-	char *name;
-
-	verbose = 0;
-	while ((c = nextopt("rv")) != '\0') {
-		if (c == 'r') {
-			clearcmdentry(0);
-		} else if (c == 'v') {
-			verbose++;
-		}
-	}
-	if (*argptr == NULL) {
-		for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
-			for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-				if (verbose || cmdp->cmdtype == CMDNORMAL)
-					printentry(cmdp, verbose);
-			}
-		}
-		return 0;
-	}
-	while ((name = *argptr) != NULL) {
-		if ((cmdp = cmdlookup(name, 0)) != NULL
-		 && (cmdp->cmdtype == CMDNORMAL
-		     || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0)))
-			delete_cmd_entry();
-		find_command(name, &entry, DO_ERR, pathval());
-		if (verbose) {
-			if (entry.cmdtype != CMDUNKNOWN) {	/* if no error msg */
-				cmdp = cmdlookup(name, 0);
-				printentry(cmdp, verbose);
-			}
-			flushall();
-		}
-		argptr++;
-	}
-	return 0;
-}
-
-
-STATIC void
-printentry(struct tblentry *cmdp, int verbose)
-{
-	int idx;
-	const char *path;
-	char *name;
-
-	switch (cmdp->cmdtype) {
-	case CMDNORMAL:
-		idx = cmdp->param.index;
-		path = pathval();
-		do {
-			name = padvance(&path, cmdp->cmdname);
-			stunalloc(name);
-		} while (--idx >= 0);
-		out1str(name);
-		break;
-	case CMDSPLBLTIN:
-		out1fmt("special builtin %s", cmdp->cmdname);
-		break;
-	case CMDBUILTIN:
-		out1fmt("builtin %s", cmdp->cmdname);
-		break;
-	case CMDFUNCTION:
-		out1fmt("function %s", cmdp->cmdname);
-		if (verbose) {
-			struct procstat ps;
-			INTOFF;
-			commandtext(&ps, cmdp->param.func);
-			INTON;
-			out1str("() { ");
-			out1str(ps.cmd);
-			out1str("; }");
-		}
-		break;
-	default:
-		error("internal error: %s cmdtype %d", cmdp->cmdname, cmdp->cmdtype);
-	}
-	if (cmdp->rehash)
-		out1c('*');
-	out1c('\n');
-}
-
-
-
-/*
- * Resolve a command name.  If you change this routine, you may have to
- * change the shellexec routine as well.
- */
-
-void
-find_command(char *name, struct cmdentry *entry, int act, const char *path)
-{
-	struct tblentry *cmdp, loc_cmd;
-	int idx;
-	int prev;
-	char *fullname;
-	struct stat statb;
-	int e;
-	int (*bltin)(int,char **);
-
-	/* If name contains a slash, don't use PATH or hash table */
-	if (strchr(name, '/') != NULL) {
-		if (act & DO_ABS) {
-			while (stat(name, &statb) < 0) {
-#ifdef SYSV
-				if (errno == EINTR)
-					continue;
-#endif
-				if (errno != ENOENT && errno != ENOTDIR)
-					e = errno;
-				entry->cmdtype = CMDUNKNOWN;
-				entry->u.index = -1;
-				return;
-			}
-			entry->cmdtype = CMDNORMAL;
-			entry->u.index = -1;
-			return;
-		}
-		entry->cmdtype = CMDNORMAL;
-		entry->u.index = 0;
-		return;
-	}
-
-	if (path != pathval())
-		act |= DO_ALTPATH;
-
-	if (act & DO_ALTPATH && strstr(path, "%builtin") != NULL)
-		act |= DO_ALTBLTIN;
-
-	/* If name is in the table, check answer will be ok */
-	if ((cmdp = cmdlookup(name, 0)) != NULL) {
-		do {
-			switch (cmdp->cmdtype) {
-			case CMDNORMAL:
-				if (act & DO_ALTPATH) {
-					cmdp = NULL;
-					continue;
-				}
-				break;
-			case CMDFUNCTION:
-				if (act & DO_NOFUNC) {
-					cmdp = NULL;
-					continue;
-				}
-				break;
-			case CMDBUILTIN:
-				if ((act & DO_ALTBLTIN) || builtinloc >= 0) {
-					cmdp = NULL;
-					continue;
-				}
-				break;
-			}
-			/* if not invalidated by cd, we're done */
-			if (cmdp->rehash == 0)
-				goto success;
-		} while (0);
-	}
-
-	/* If %builtin not in path, check for builtin next */
-	if ((act & DO_ALTPATH ? !(act & DO_ALTBLTIN) : builtinloc < 0) &&
-	    (bltin = find_builtin(name)) != 0)
-		goto builtin_success;
-
-	/* We have to search path. */
-	prev = -1;		/* where to start */
-	if (cmdp) {		/* doing a rehash */
-		if (cmdp->cmdtype == CMDBUILTIN)
-			prev = builtinloc;
-		else
-			prev = cmdp->param.index;
-	}
-
-	e = ENOENT;
-	idx = -1;
-loop:
-	while ((fullname = padvance(&path, name)) != NULL) {
-		stunalloc(fullname);
-		idx++;
-		if (pathopt) {
-			if (prefix("builtin", pathopt)) {
-				if ((bltin = find_builtin(name)) == 0)
-					goto loop;
-				goto builtin_success;
-			} else if (prefix("func", pathopt)) {
-				/* handled below */
-			} else {
-				/* ignore unimplemented options */
-				goto loop;
-			}
-		}
-		/* if rehash, don't redo absolute path names */
-		if (fullname[0] == '/' && idx <= prev) {
-			if (idx < prev)
-				goto loop;
-			TRACE(("searchexec \"%s\": no change\n", name));
-			goto success;
-		}
-		while (stat(fullname, &statb) < 0) {
-#ifdef SYSV
-			if (errno == EINTR)
-				continue;
-#endif
-			if (errno != ENOENT && errno != ENOTDIR)
-				e = errno;
-			goto loop;
-		}
-		e = EACCES;	/* if we fail, this will be the error */
-		if (!S_ISREG(statb.st_mode))
-			goto loop;
-		if (pathopt) {		/* this is a %func directory */
-			if (act & DO_NOFUNC)
-				goto loop;
-			stalloc(strlen(fullname) + 1);
-			readcmdfile(fullname);
-			if ((cmdp = cmdlookup(name, 0)) == NULL ||
-			    cmdp->cmdtype != CMDFUNCTION)
-				error("%s not defined in %s", name, fullname);
-			stunalloc(fullname);
-			goto success;
-		}
-#ifdef notdef
-		/* XXX this code stops root executing stuff, and is buggy
-		   if you need a group from the group list. */
-		if (statb.st_uid == geteuid()) {
-			if ((statb.st_mode & 0100) == 0)
-				goto loop;
-		} else if (statb.st_gid == getegid()) {
-			if ((statb.st_mode & 010) == 0)
-				goto loop;
-		} else {
-			if ((statb.st_mode & 01) == 0)
-				goto loop;
-		}
-#endif
-		TRACE(("searchexec \"%s\" returns \"%s\"\n", name, fullname));
-		INTOFF;
-		if (act & DO_ALTPATH) {
-			stalloc(strlen(fullname) + 1);
-			cmdp = &loc_cmd;
-		} else
-			cmdp = cmdlookup(name, 1);
-		cmdp->cmdtype = CMDNORMAL;
-		cmdp->param.index = idx;
-		INTON;
-		goto success;
-	}
-
-	/* We failed.  If there was an entry for this command, delete it */
-	if (cmdp)
-		delete_cmd_entry();
-	if (act & DO_ERR)
-		outfmt(out2, "%s: %s\n", name, errmsg(e, E_EXEC));
-	entry->cmdtype = CMDUNKNOWN;
-	return;
-
-builtin_success:
-	INTOFF;
-	if (act & DO_ALTPATH)
-		cmdp = &loc_cmd;
-	else
-		cmdp = cmdlookup(name, 1);
-	if (cmdp->cmdtype == CMDFUNCTION)
-		/* DO_NOFUNC must have been set */
-		cmdp = &loc_cmd;
-	cmdp->cmdtype = CMDBUILTIN;
-	cmdp->param.bltin = bltin;
-	INTON;
-success:
-	cmdp->rehash = 0;
-	entry->cmdtype = cmdp->cmdtype;
-	entry->u = cmdp->param;
-}
-
-
-
-/*
- * Search the table of builtin commands.
- */
-
-int
-(*find_builtin(name))(int, char **)
-	char *name;
-{
-	const struct builtincmd *bp;
-
-	for (bp = builtincmd ; bp->name ; bp++) {
-		if (*bp->name == *name && equal(bp->name, name))
-			return bp->builtin;
-	}
-	return 0;
-}
-
-int
-(*find_splbltin(name))(int, char **)
-	char *name;
-{
-	const struct builtincmd *bp;
-
-	for (bp = splbltincmd ; bp->name ; bp++) {
-		if (*bp->name == *name && equal(bp->name, name))
-			return bp->builtin;
-	}
-	return 0;
-}
-
-/*
- * At shell startup put special builtins into hash table.
- * ensures they are executed first (see posix).
- * We stop functions being added with the same name
- * (as they are impossible to call)
- */
-
-void
-hash_special_builtins(void)
-{
-	const struct builtincmd *bp;
-	struct tblentry *cmdp;
-
-	for (bp = splbltincmd ; bp->name ; bp++) {
-		cmdp = cmdlookup(bp->name, 1);
-		cmdp->cmdtype = CMDSPLBLTIN;
-		cmdp->param.bltin = bp->builtin;
-	}
-}
-
-
-
-/*
- * Called when a cd is done.  Marks all commands so the next time they
- * are executed they will be rehashed.
- */
-
-void
-hashcd(void)
-{
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-
-	for (pp = cmdtable ; pp < &cmdtable[CMDTABLESIZE] ; pp++) {
-		for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-			if (cmdp->cmdtype == CMDNORMAL
-			 || (cmdp->cmdtype == CMDBUILTIN && builtinloc >= 0))
-				cmdp->rehash = 1;
-		}
-	}
-}
-
-
-
-/*
- * Fix command hash table when PATH changed.
- * Called before PATH is changed.  The argument is the new value of PATH;
- * pathval() still returns the old value at this point.
- * Called with interrupts off.
- */
-
-void
-changepath(const char *newval)
-{
-	const char *old, *new;
-	int idx;
-	int firstchange;
-	int bltin;
-
-	old = pathval();
-	new = newval;
-	firstchange = 9999;	/* assume no change */
-	idx = 0;
-	bltin = -1;
-	for (;;) {
-		if (*old != *new) {
-			firstchange = idx;
-			if ((*old == '\0' && *new == ':')
-			 || (*old == ':' && *new == '\0'))
-				firstchange++;
-			old = new;	/* ignore subsequent differences */
-		}
-		if (*new == '\0')
-			break;
-		if (*new == '%' && bltin < 0 && prefix("builtin", new + 1))
-			bltin = idx;
-		if (*new == ':') {
-			idx++;
-		}
-		new++, old++;
-	}
-	if (builtinloc < 0 && bltin >= 0)
-		builtinloc = bltin;		/* zap builtins */
-	if (builtinloc >= 0 && bltin < 0)
-		firstchange = 0;
-	clearcmdentry(firstchange);
-	builtinloc = bltin;
-}
-
-
-/*
- * Clear out command entries.  The argument specifies the first entry in
- * PATH which has changed.
- */
-
-STATIC void
-clearcmdentry(int firstchange)
-{
-	struct tblentry **tblp;
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-
-	INTOFF;
-	for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
-		pp = tblp;
-		while ((cmdp = *pp) != NULL) {
-			if ((cmdp->cmdtype == CMDNORMAL &&
-			     cmdp->param.index >= firstchange)
-			 || (cmdp->cmdtype == CMDBUILTIN &&
-			     builtinloc >= firstchange)) {
-				*pp = cmdp->next;
-				ckfree(cmdp);
-			} else {
-				pp = &cmdp->next;
-			}
-		}
-	}
-	INTON;
-}
-
-
-/*
- * Delete all functions.
- */
-
-#ifdef mkinit
-MKINIT void deletefuncs(void);
-MKINIT void hash_special_builtins(void);
-
-INIT {
-	hash_special_builtins();
-}
-
-SHELLPROC {
-	deletefuncs();
-}
-#endif
-
-void
-deletefuncs(void)
-{
-	struct tblentry **tblp;
-	struct tblentry **pp;
-	struct tblentry *cmdp;
-
-	INTOFF;
-	for (tblp = cmdtable ; tblp < &cmdtable[CMDTABLESIZE] ; tblp++) {
-		pp = tblp;
-		while ((cmdp = *pp) != NULL) {
-			if (cmdp->cmdtype == CMDFUNCTION) {
-				*pp = cmdp->next;
-				freefunc(cmdp->param.func);
-				ckfree(cmdp);
-			} else {
-				pp = &cmdp->next;
-			}
-		}
-	}
-	INTON;
-}
-
-
-
-/*
- * Locate a command in the command hash table.  If "add" is nonzero,
- * add the command to the table if it is not already present.  The
- * variable "lastcmdentry" is set to point to the address of the link
- * pointing to the entry, so that delete_cmd_entry can delete the
- * entry.
- */
-
-struct tblentry **lastcmdentry;
-
-
-STATIC struct tblentry *
-cmdlookup(const char *name, int add)
-{
-	int hashval;
-	const char *p;
-	struct tblentry *cmdp;
-	struct tblentry **pp;
-
-	p = name;
-	hashval = *p << 4;
-	while (*p)
-		hashval += *p++;
-	hashval &= 0x7FFF;
-	pp = &cmdtable[hashval % CMDTABLESIZE];
-	for (cmdp = *pp ; cmdp ; cmdp = cmdp->next) {
-		if (equal(cmdp->cmdname, name))
-			break;
-		pp = &cmdp->next;
-	}
-	if (add && cmdp == NULL) {
-		INTOFF;
-		cmdp = *pp = ckmalloc(sizeof (struct tblentry) - ARB
-					+ strlen(name) + 1);
-		cmdp->next = NULL;
-		cmdp->cmdtype = CMDUNKNOWN;
-		cmdp->rehash = 0;
-		strcpy(cmdp->cmdname, name);
-		INTON;
-	}
-	lastcmdentry = pp;
-	return cmdp;
-}
-
-/*
- * Delete the command entry returned on the last lookup.
- */
-
-STATIC void
-delete_cmd_entry(void)
-{
-	struct tblentry *cmdp;
-
-	INTOFF;
-	cmdp = *lastcmdentry;
-	*lastcmdentry = cmdp->next;
-	ckfree(cmdp);
-	INTON;
-}
-
-
-
-#ifdef notdef
-void
-getcmdentry(char *name, struct cmdentry *entry)
-{
-	struct tblentry *cmdp = cmdlookup(name, 0);
-
-	if (cmdp) {
-		entry->u = cmdp->param;
-		entry->cmdtype = cmdp->cmdtype;
-	} else {
-		entry->cmdtype = CMDUNKNOWN;
-		entry->u.index = 0;
-	}
-}
-#endif
-
-
-/*
- * Add a new command entry, replacing any existing command entry for
- * the same name - except special builtins.
- */
-
-STATIC void
-addcmdentry(char *name, struct cmdentry *entry)
-{
-	struct tblentry *cmdp;
-
-	INTOFF;
-	cmdp = cmdlookup(name, 1);
-	if (cmdp->cmdtype != CMDSPLBLTIN) {
-		if (cmdp->cmdtype == CMDFUNCTION) {
-			freefunc(cmdp->param.func);
-		}
-		cmdp->cmdtype = entry->cmdtype;
-		cmdp->param = entry->u;
-	}
-	INTON;
-}
-
-
-/*
- * Define a shell function.
- */
-
-void
-defun(char *name, union node *func)
-{
-	struct cmdentry entry;
-
-	INTOFF;
-	entry.cmdtype = CMDFUNCTION;
-	entry.u.func = copyfunc(func);
-	addcmdentry(name, &entry);
-	INTON;
-}
-
-
-/*
- * Delete a function if it exists.
- */
-
-int
-unsetfunc(char *name)
-{
-	struct tblentry *cmdp;
-
-	if ((cmdp = cmdlookup(name, 0)) != NULL &&
-	    cmdp->cmdtype == CMDFUNCTION) {
-		freefunc(cmdp->param.func);
-		delete_cmd_entry();
-		return (0);
-	}
-	return (1);
-}
-
-/*
- * Locate and print what a word is...
- * also used for 'command -[v|V]'
- */
-
-int
-typecmd(int argc, char **argv)
-{
-	struct cmdentry entry;
-	struct tblentry *cmdp;
-	char * const *pp;
-	struct alias *ap;
-	int err = 0;
-	char *arg;
-	int c;
-	int V_flag = 0;
-	int v_flag = 0;
-	int p_flag = 0;
-
-	while ((c = nextopt("vVp")) != 0) {
-		switch (c) {
-		case 'v': v_flag = 1; break;
-		case 'V': V_flag = 1; break;
-		case 'p': p_flag = 1; break;
-		}
-	}
-
-	if (p_flag && (v_flag || V_flag))
-		error("cannot specify -p with -v or -V");
-
-	while ((arg = *argptr++)) {
-		if (!v_flag)
-			out1str(arg);
-		/* First look at the keywords */
-		for (pp = parsekwd; *pp; pp++)
-			if (**pp == *arg && equal(*pp, arg))
-				break;
-
-		if (*pp) {
-			if (v_flag)
-				err = 1;
-			else
-				out1str(" is a shell keyword\n");
-			continue;
-		}
-
-		/* Then look at the aliases */
-		if ((ap = lookupalias(arg, 1)) != NULL) {
-			if (!v_flag)
-				out1fmt(" is an alias for \n");
-			out1fmt("%s\n", ap->val);
-			continue;
-		}
-
-		/* Then check if it is a tracked alias */
-		if ((cmdp = cmdlookup(arg, 0)) != NULL) {
-			entry.cmdtype = cmdp->cmdtype;
-			entry.u = cmdp->param;
-		} else {
-			/* Finally use brute force */
-			find_command(arg, &entry, DO_ABS, pathval());
-		}
-
-		switch (entry.cmdtype) {
-		case CMDNORMAL: {
-			if (strchr(arg, '/') == NULL) {
-				const char *path = pathval();
-				char *name;
-				int j = entry.u.index;
-				do {
-					name = padvance(&path, arg);
-					stunalloc(name);
-				} while (--j >= 0);
-				if (!v_flag)
-					out1fmt(" is%s ",
-					    cmdp ? " a tracked alias for" : "");
-				out1fmt("%s\n", name);
-			} else {
-				if (access(arg, X_OK) == 0) {
-					if (!v_flag)
-						out1fmt(" is ");
-					out1fmt("%s\n", arg);
-				} else {
-					if (!v_flag)
-						out1fmt(": %s\n",
-						    strerror(errno));
-					else
-						err = 126;
-				}
-			}
- 			break;
-		}
-		case CMDFUNCTION:
-			if (!v_flag)
-				out1str(" is a shell function\n");
-			else
-				out1fmt("%s\n", arg);
-			break;
-
-		case CMDBUILTIN:
-			if (!v_flag)
-				out1str(" is a shell builtin\n");
-			else
-				out1fmt("%s\n", arg);
-			break;
-
-		case CMDSPLBLTIN:
-			if (!v_flag)
-				out1str(" is a special shell builtin\n");
-			else
-				out1fmt("%s\n", arg);
-			break;
-
-		default:
-			if (!v_flag)
-				out1str(": not found\n");
-			err = 127;
-			break;
-		}
-	}
-	return err;
-}
diff --git a/sh/exec.h b/sh/exec.h
deleted file mode 100644
index 26fd09c..0000000
--- a/sh/exec.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/*	$NetBSD: exec.h,v 1.21 2003/08/07 09:05:31 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)exec.h	8.3 (Berkeley) 6/8/95
- */
-
-/* values of cmdtype */
-#define CMDUNKNOWN	-1	/* no entry in table for command */
-#define CMDNORMAL	0	/* command is an executable program */
-#define CMDFUNCTION	1	/* command is a shell function */
-#define CMDBUILTIN	2	/* command is a shell builtin */
-#define CMDSPLBLTIN	3	/* command is a special shell builtin */
-
-
-struct cmdentry {
-	int cmdtype;
-	union param {
-		int index;
-		int (*bltin)(int, char**);
-		union node *func;
-	} u;
-};
-
-
-/* action to find_command() */
-#define DO_ERR		0x01	/* prints errors */
-#define DO_ABS		0x02	/* checks absolute paths */
-#define DO_NOFUNC	0x04	/* don't return shell functions, for command */
-#define DO_ALTPATH	0x08	/* using alternate path */
-#define DO_ALTBLTIN	0x20	/* %builtin in alt. path */
-
-extern const char *pathopt;	/* set by padvance */
-
-void shellexec(char **, char **, const char *, int, int)
-    __attribute__((__noreturn__));
-char *padvance(const char **, const char *);
-int hashcmd(int, char **);
-void find_command(char *, struct cmdentry *, int, const char *);
-int (*find_builtin(char *))(int, char **);
-int (*find_splbltin(char *))(int, char **);
-void hashcd(void);
-void changepath(const char *);
-void deletefuncs(void);
-void getcmdentry(char *, struct cmdentry *);
-void addcmdentry(char *, struct cmdentry *);
-void defun(char *, union node *);
-int unsetfunc(char *);
-int typecmd(int, char **);
-void hash_special_builtins(void);
diff --git a/sh/expand.c b/sh/expand.c
deleted file mode 100644
index d3462fc..0000000
--- a/sh/expand.c
+++ /dev/null
@@ -1,1559 +0,0 @@
-/*	$NetBSD: expand.c,v 1.68.2.2 2005/04/07 11:37:39 tron Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)expand.c	8.5 (Berkeley) 5/15/95";
-#else
-__RCSID("$NetBSD: expand.c,v 1.68.2.2 2005/04/07 11:37:39 tron Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/stat.h>
-#include <errno.h>
-#include <dirent.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-/*
- * Routines to expand arguments to commands.  We have to deal with
- * backquotes, shell variables, and file metacharacters.
- */
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"
-#include "eval.h"
-#include "expand.h"
-#include "syntax.h"
-#include "parser.h"
-#include "jobs.h"
-#include "options.h"
-#include "var.h"
-#include "input.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "show.h"
-
-/*
- * Structure specifying which parts of the string should be searched
- * for IFS characters.
- */
-
-struct ifsregion {
-	struct ifsregion *next;	/* next region in list */
-	int begoff;		/* offset of start of region */
-	int endoff;		/* offset of end of region */
-	int inquotes;		/* search for nul bytes only */
-};
-
-
-char *expdest;			/* output of current string */
-struct nodelist *argbackq;	/* list of back quote expressions */
-struct ifsregion ifsfirst;	/* first struct in list of ifs regions */
-struct ifsregion *ifslastp;	/* last struct in list */
-struct arglist exparg;		/* holds expanded arg list */
-
-STATIC void argstr(char *, int);
-STATIC char *exptilde(char *, int);
-STATIC void expbackq(union node *, int, int);
-STATIC int subevalvar(char *, char *, int, int, int, int);
-STATIC char *evalvar(char *, int);
-STATIC int varisset(char *, int);
-STATIC void varvalue(char *, int, int, int);
-STATIC void recordregion(int, int, int);
-STATIC void removerecordregions(int); 
-STATIC void ifsbreakup(char *, struct arglist *);
-STATIC void ifsfree(void);
-STATIC void expandmeta(struct strlist *, int);
-STATIC void expmeta(char *, char *);
-STATIC void addfname(char *);
-STATIC struct strlist *expsort(struct strlist *);
-STATIC struct strlist *msort(struct strlist *, int);
-STATIC int pmatch(char *, char *, int);
-STATIC char *cvtnum(int, char *);
-
-/*
- * Expand shell variables and backquotes inside a here document.
- */
-
-void
-expandhere(union node *arg, int fd)
-{
-	herefd = fd;
-	expandarg(arg, (struct arglist *)NULL, 0);
-	xwrite(fd, stackblock(), expdest - stackblock());
-}
-
-
-/*
- * Perform variable substitution and command substitution on an argument,
- * placing the resulting list of arguments in arglist.  If EXP_FULL is true,
- * perform splitting and file name expansion.  When arglist is NULL, perform
- * here document expansion.
- */
-
-void
-expandarg(union node *arg, struct arglist *arglist, int flag)
-{
-	struct strlist *sp;
-	char *p;
-
-	argbackq = arg->narg.backquote;
-	STARTSTACKSTR(expdest);
-	ifsfirst.next = NULL;
-	ifslastp = NULL;
-	argstr(arg->narg.text, flag);
-	if (arglist == NULL) {
-		return;			/* here document expanded */
-	}
-	STPUTC('\0', expdest);
-	p = grabstackstr(expdest);
-	exparg.lastp = &exparg.list;
-	/*
-	 * TODO - EXP_REDIR
-	 */
-	if (flag & EXP_FULL) {
-		ifsbreakup(p, &exparg);
-		*exparg.lastp = NULL;
-		exparg.lastp = &exparg.list;
-		expandmeta(exparg.list, flag);
-	} else {
-		if (flag & EXP_REDIR) /*XXX - for now, just remove escapes */
-			rmescapes(p);
-		sp = (struct strlist *)stalloc(sizeof (struct strlist));
-		sp->text = p;
-		*exparg.lastp = sp;
-		exparg.lastp = &sp->next;
-	}
-	ifsfree();
-	*exparg.lastp = NULL;
-	if (exparg.list) {
-		*arglist->lastp = exparg.list;
-		arglist->lastp = exparg.lastp;
-	}
-}
-
-
-
-/*
- * Perform variable and command substitution.
- * If EXP_FULL is set, output CTLESC characters to allow for further processing.
- * Otherwise treat $@ like $* since no splitting will be performed.
- */
-
-STATIC void
-argstr(char *p, int flag)
-{
-	char c;
-	int quotes = flag & (EXP_FULL | EXP_CASE);	/* do CTLESC */
-	int firsteq = 1;
-	const char *ifs = 0;
-	int ifs_split = EXP_IFS_SPLIT;
-
-	if (flag & EXP_IFS_SPLIT)
-		ifs = ifsset() ? ifsval() : " \t\n";
-
-	if (*p == '~' && (flag & (EXP_TILDE | EXP_VARTILDE)))
-		p = exptilde(p, flag);
-	for (;;) {
-		switch (c = *p++) {
-		case '\0':
-		case CTLENDVAR: /* end of expanding yyy in ${xxx-yyy} */
-			return;
-		case CTLQUOTEMARK:
-			/* "$@" syntax adherence hack */
-			if (p[0] == CTLVAR && p[2] == '@' && p[3] == '=')
-				break;
-			if ((flag & EXP_FULL) != 0)
-				STPUTC(c, expdest);
-			ifs_split = 0;
-			break;
-		case CTLQUOTEEND:
-			ifs_split = EXP_IFS_SPLIT;
-			break;
-		case CTLESC:
-			if (quotes)
-				STPUTC(c, expdest);
-			c = *p++;
-			STPUTC(c, expdest);
-			break;
-		case CTLVAR:
-			p = evalvar(p, (flag & ~EXP_IFS_SPLIT) | (flag & ifs_split));
-			break;
-		case CTLBACKQ:
-		case CTLBACKQ|CTLQUOTE:
-			expbackq(argbackq->n, c & CTLQUOTE, flag);
-			argbackq = argbackq->next;
-			break;
-		case CTLENDARI:
-			expari(flag);
-			break;
-		case ':':
-		case '=':
-			/*
-			 * sort of a hack - expand tildes in variable
-			 * assignments (after the first '=' and after ':'s).
-			 */
-			STPUTC(c, expdest);
-			if (flag & EXP_VARTILDE && *p == '~') {
-				if (c == '=') {
-					if (firsteq)
-						firsteq = 0;
-					else
-						break;
-				}
-				p = exptilde(p, flag);
-			}
-			break;
-		default:
-			STPUTC(c, expdest);
-			if (flag & EXP_IFS_SPLIT & ifs_split && strchr(ifs, c) != NULL) {
-				/* We need to get the output split here... */
-				recordregion(expdest - stackblock() - 1,
-						expdest - stackblock(), 0);
-			}
-			break;
-		}
-	}
-}
-
-STATIC char *
-exptilde(char *p, int flag)
-{
-	char c, *startp = p;
-	const char *home;
-	int quotes = flag & (EXP_FULL | EXP_CASE);
-
-	while ((c = *p) != '\0') {
-		switch(c) {
-		case CTLESC:
-			return (startp);
-		case CTLQUOTEMARK:
-			return (startp);
-		case ':':
-			if (flag & EXP_VARTILDE)
-				goto done;
-			break;
-		case '/':
-			goto done;
-		}
-		p++;
-	}
-done:
-	*p = '\0';
-	if (*(startp+1) == '\0') {
-		if ((home = lookupvar("HOME")) == NULL)
-			goto lose;
-	} else
-        	goto lose;
-	if (*home == '\0')
-		goto lose;
-	*p = c;
-	while ((c = *home++) != '\0') {
-		if (quotes && SQSYNTAX[(int)c] == CCTL)
-			STPUTC(CTLESC, expdest);
-		STPUTC(c, expdest);
-	}
-	return (p);
-lose:
-	*p = c;
-	return (startp);
-}
-
-
-STATIC void 
-removerecordregions(int endoff)
-{
-	if (ifslastp == NULL)
-		return;
-
-	if (ifsfirst.endoff > endoff) {
-		while (ifsfirst.next != NULL) {
-			struct ifsregion *ifsp;
-			INTOFF;
-			ifsp = ifsfirst.next->next;
-			ckfree(ifsfirst.next);
-			ifsfirst.next = ifsp;
-			INTON;
-		}
-		if (ifsfirst.begoff > endoff)
-			ifslastp = NULL;
-		else {
-			ifslastp = &ifsfirst;
-			ifsfirst.endoff = endoff;
-		}
-		return;
-	}
-	
-	ifslastp = &ifsfirst;
-	while (ifslastp->next && ifslastp->next->begoff < endoff)
-		ifslastp=ifslastp->next;
-	while (ifslastp->next != NULL) {
-		struct ifsregion *ifsp;
-		INTOFF;
-		ifsp = ifslastp->next->next;
-		ckfree(ifslastp->next);
-		ifslastp->next = ifsp;
-		INTON;
-	}
-	if (ifslastp->endoff > endoff)
-		ifslastp->endoff = endoff;
-}
-
-
-/*
- * Expand arithmetic expression.  Backup to start of expression,
- * evaluate, place result in (backed up) result, adjust string position.
- */
-void
-expari(int flag)
-{
-	char *p, *start;
-	int result;
-	int begoff;
-	int quotes = flag & (EXP_FULL | EXP_CASE);
-	int quoted;
-
-	/*	ifsfree(); */
-
-	/*
-	 * This routine is slightly over-complicated for
-	 * efficiency.  First we make sure there is
-	 * enough space for the result, which may be bigger
-	 * than the expression if we add exponentation.  Next we
-	 * scan backwards looking for the start of arithmetic.  If the
-	 * next previous character is a CTLESC character, then we
-	 * have to rescan starting from the beginning since CTLESC
-	 * characters have to be processed left to right.
-	 */
-#if INT_MAX / 1000000000 >= 10 || INT_MIN / 1000000000 <= -10
-#error "integers with more than 10 digits are not supported"
-#endif
-	CHECKSTRSPACE(12 - 2, expdest);
-	USTPUTC('\0', expdest);
-	start = stackblock();
-	p = expdest - 1;
-	while (*p != CTLARI && p >= start)
-		--p;
-	if (*p != CTLARI)
-		error("missing CTLARI (shouldn't happen)");
-	if (p > start && *(p-1) == CTLESC)
-		for (p = start; *p != CTLARI; p++)
-			if (*p == CTLESC)
-				p++;
-
-	if (p[1] == '"')
-		quoted=1;
-	else
-		quoted=0;
-	begoff = p - start;
-	removerecordregions(begoff);
-	if (quotes)
-		rmescapes(p+2);
-	result = arith(p+2);
-	fmtstr(p, 12, "%d", result);
-
-	while (*p++)
-		;
-
-	if (quoted == 0)
-		recordregion(begoff, p - 1 - start, 0);
-	result = expdest - p + 1;
-	STADJUST(-result, expdest);
-}
-
-
-/*
- * Expand stuff in backwards quotes.
- */
-
-STATIC void
-expbackq(union node *cmd, int quoted, int flag)
-{
-	struct backcmd in;
-	int i;
-	char buf[128];
-	char *p;
-	char *dest = expdest;
-	struct ifsregion saveifs, *savelastp;
-	struct nodelist *saveargbackq;
-	char lastc;
-	int startloc = dest - stackblock();
-	char const *syntax = quoted? DQSYNTAX : BASESYNTAX;
-	int saveherefd;
-	int quotes = flag & (EXP_FULL | EXP_CASE);
-
-	INTOFF;
-	saveifs = ifsfirst;
-	savelastp = ifslastp;
-	saveargbackq = argbackq;
-	saveherefd = herefd;
-	herefd = -1;
-	p = grabstackstr(dest);
-	evalbackcmd(cmd, &in);
-	ungrabstackstr(p, dest);
-	ifsfirst = saveifs;
-	ifslastp = savelastp;
-	argbackq = saveargbackq;
-	herefd = saveherefd;
-
-	p = in.buf;
-	lastc = '\0';
-	for (;;) {
-		if (--in.nleft < 0) {
-			if (in.fd < 0)
-				break;
-			while ((i = read(in.fd, buf, sizeof buf)) < 0 && errno == EINTR);
-			TRACE(("expbackq: read returns %d\n", i));
-			if (i <= 0)
-				break;
-			p = buf;
-			in.nleft = i - 1;
-		}
-		lastc = *p++;
-		if (lastc != '\0') {
-			if (quotes && syntax[(int)lastc] == CCTL)
-				STPUTC(CTLESC, dest);
-			STPUTC(lastc, dest);
-		}
-	}
-
-	/* Eat all trailing newlines */
-	p = stackblock() + startloc;
-	while (dest > p && dest[-1] == '\n')
-		STUNPUTC(dest);
-
-	if (in.fd >= 0)
-		close(in.fd);
-	if (in.buf)
-		ckfree(in.buf);
-	if (in.jp)
-		back_exitstatus = waitforjob(in.jp);
-	if (quoted == 0)
-		recordregion(startloc, dest - stackblock(), 0);
-	TRACE(("evalbackq: size=%d: \"%.*s\"\n",
-		(dest - stackblock()) - startloc,
-		(dest - stackblock()) - startloc,
-		stackblock() + startloc));
-	expdest = dest;
-	INTON;
-}
-
-
-
-STATIC int
-subevalvar(char *p, char *str, int strloc, int subtype, int startloc, int varflags)
-{
-	char *startp;
-	char *loc = NULL;
-	char *q;
-	int c = 0;
-	int saveherefd = herefd;
-	struct nodelist *saveargbackq = argbackq;
-	int amount;
-
-	herefd = -1;
-	argstr(p, 0);
-	STACKSTRNUL(expdest);
-	herefd = saveherefd;
-	argbackq = saveargbackq;
-	startp = stackblock() + startloc;
-	if (str == NULL)
-	    str = stackblock() + strloc;
-
-	switch (subtype) {
-	case VSASSIGN:
-		setvar(str, startp, 0);
-		amount = startp - expdest;
-		STADJUST(amount, expdest);
-		varflags &= ~VSNUL;
-		if (c != 0)
-			*loc = c;
-		return 1;
-
-	case VSQUESTION:
-		if (*p != CTLENDVAR) {
-			outfmt(&errout, "%s\n", startp);
-			error((char *)NULL);
-		}
-		error("%.*s: parameter %snot set", p - str - 1,
-		      str, (varflags & VSNUL) ? "null or "
-					      : nullstr);
-		/* NOTREACHED */
-
-	case VSTRIMLEFT:
-		for (loc = startp; loc < str; loc++) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp, varflags & VSQUOTE))
-				goto recordleft;
-			*loc = c;
-			if ((varflags & VSQUOTE) && *loc == CTLESC)
-			        loc++;
-		}
-		return 0;
-
-	case VSTRIMLEFTMAX:
-		for (loc = str - 1; loc >= startp;) {
-			c = *loc;
-			*loc = '\0';
-			if (patmatch(str, startp, varflags & VSQUOTE))
-				goto recordleft;
-			*loc = c;
-			loc--;
-			if ((varflags & VSQUOTE) && loc > startp &&
-			    *(loc - 1) == CTLESC) {
-				for (q = startp; q < loc; q++)
-					if (*q == CTLESC)
-						q++;
-				if (q > loc)
-					loc--;
-			}
-		}
-		return 0;
-
-	case VSTRIMRIGHT:
-	        for (loc = str - 1; loc >= startp;) {
-			if (patmatch(str, loc, varflags & VSQUOTE))
-				goto recordright;
-			loc--;
-			if ((varflags & VSQUOTE) && loc > startp &&
-			    *(loc - 1) == CTLESC) { 
-				for (q = startp; q < loc; q++)
-					if (*q == CTLESC)
-						q++;
-				if (q > loc)
-					loc--;
-			}
-		}
-		return 0;
-
-	case VSTRIMRIGHTMAX:
-		for (loc = startp; loc < str - 1; loc++) {
-			if (patmatch(str, loc, varflags & VSQUOTE))
-				goto recordright;
-			if ((varflags & VSQUOTE) && *loc == CTLESC)
-			        loc++;
-		}
-		return 0;
-
-	default:
-		abort();
-	}
-
-recordleft:
-	*loc = c;
-	amount = ((str - 1) - (loc - startp)) - expdest;
-	STADJUST(amount, expdest);
-	while (loc != str - 1)
-		*startp++ = *loc++;
-	return 1;
-
-recordright:
-	amount = loc - expdest;
-	STADJUST(amount, expdest);
-	STPUTC('\0', expdest);
-	STADJUST(-1, expdest);
-	return 1;
-}
-
-
-/*
- * Expand a variable, and return a pointer to the next character in the
- * input string.
- */
-
-STATIC char *
-evalvar(char *p, int flag)
-{
-	int subtype;
-	int varflags;
-	char *var;
-	char *val;
-	int patloc;
-	int c;
-	int set;
-	int special;
-	int startloc;
-	int varlen;
-	int apply_ifs;
-	int quotes = flag & (EXP_FULL | EXP_CASE);
-
-	varflags = (unsigned char)*p++;
-	subtype = varflags & VSTYPE;
-	var = p;
-	special = !is_name(*p);
-	p = strchr(p, '=') + 1;
-
-again: /* jump here after setting a variable with ${var=text} */
-	if (special) {
-		set = varisset(var, varflags & VSNUL);
-		val = NULL;
-	} else {
-		val = lookupvar(var);
-		if (val == NULL || ((varflags & VSNUL) && val[0] == '\0')) {
-			val = NULL;
-			set = 0;
-		} else
-			set = 1;
-	}
-
-	varlen = 0;
-	startloc = expdest - stackblock();
-
-	if (!set && uflag) {
-		switch (subtype) {
-		case VSNORMAL:
-		case VSTRIMLEFT:
-		case VSTRIMLEFTMAX:
-		case VSTRIMRIGHT:
-		case VSTRIMRIGHTMAX:
-		case VSLENGTH:
-			error("%.*s: parameter not set", p - var - 1, var);
-			/* NOTREACHED */
-		}
-	}
-
-	if (set && subtype != VSPLUS) {
-		/* insert the value of the variable */
-		if (special) {
-			varvalue(var, varflags & VSQUOTE, subtype, flag);
-			if (subtype == VSLENGTH) {
-				varlen = expdest - stackblock() - startloc;
-				STADJUST(-varlen, expdest);
-			}
-		} else {
-			char const *syntax = (varflags & VSQUOTE) ? DQSYNTAX
-								  : BASESYNTAX;
-
-			if (subtype == VSLENGTH) {
-				for (;*val; val++)
-					varlen++;
-			} else {
-				while (*val) {
-					if (quotes && syntax[(int)*val] == CCTL)
-						STPUTC(CTLESC, expdest);
-					STPUTC(*val++, expdest);
-				}
-
-			}
-		}
-	}
-
-
-	apply_ifs = ((varflags & VSQUOTE) == 0 ||
-		(*var == '@' && shellparam.nparam != 1));
-
-	switch (subtype) {
-	case VSLENGTH:
-		expdest = cvtnum(varlen, expdest);
-		break;
-
-	case VSNORMAL:
-		break;
-
-	case VSPLUS:
-		set = !set;
-		/* FALLTHROUGH */
-	case VSMINUS:
-		if (!set) {
-		        argstr(p, flag | (apply_ifs ? EXP_IFS_SPLIT : 0));
-			/*
-			 * ${x-a b c} doesn't get split, but removing the
-			 * 'apply_ifs = 0' apparantly breaks ${1+"$@"}..
-			 * ${x-'a b' c} should generate 2 args.
-			 */
-			/* We should have marked stuff already */
-			apply_ifs = 0;
-		}
-		break;
-
-	case VSTRIMLEFT:
-	case VSTRIMLEFTMAX:
-	case VSTRIMRIGHT:
-	case VSTRIMRIGHTMAX:
-		if (!set)
-			break;
-		/*
-		 * Terminate the string and start recording the pattern
-		 * right after it
-		 */
-		STPUTC('\0', expdest);
-		patloc = expdest - stackblock();
-		if (subevalvar(p, NULL, patloc, subtype,
-			       startloc, varflags) == 0) {
-			int amount = (expdest - stackblock() - patloc) + 1;
-			STADJUST(-amount, expdest);
-		}
-		/* Remove any recorded regions beyond start of variable */
-		removerecordregions(startloc);
-		apply_ifs = 1;
-		break;
-
-	case VSASSIGN:
-	case VSQUESTION:
-		if (set)
-			break;
-		if (subevalvar(p, var, 0, subtype, startloc, varflags)) {
-			varflags &= ~VSNUL;
-			/* 
-			 * Remove any recorded regions beyond 
-			 * start of variable 
-			 */
-			removerecordregions(startloc);
-			goto again;
-		}
-		apply_ifs = 0;
-		break;
-
-	default:
-		abort();
-	}
-
-	if (apply_ifs)
-		recordregion(startloc, expdest - stackblock(),
-			     varflags & VSQUOTE);
-
-	if (subtype != VSNORMAL) {	/* skip to end of alternative */
-		int nesting = 1;
-		for (;;) {
-			if ((c = *p++) == CTLESC)
-				p++;
-			else if (c == CTLBACKQ || c == (CTLBACKQ|CTLQUOTE)) {
-				if (set)
-					argbackq = argbackq->next;
-			} else if (c == CTLVAR) {
-				if ((*p++ & VSTYPE) != VSNORMAL)
-					nesting++;
-			} else if (c == CTLENDVAR) {
-				if (--nesting == 0)
-					break;
-			}
-		}
-	}
-	return p;
-}
-
-
-
-/*
- * Test whether a specialized variable is set.
- */
-
-STATIC int
-varisset(char *name, int nulok)
-{
-	if (*name == '!')
-		return backgndpid != -1;
-	else if (*name == '@' || *name == '*') {
-		if (*shellparam.p == NULL)
-			return 0;
-
-		if (nulok) {
-			char **av;
-
-			for (av = shellparam.p; *av; av++)
-				if (**av != '\0')
-					return 1;
-			return 0;
-		}
-	} else if (is_digit(*name)) {
-		char *ap;
-		int num = atoi(name);
-
-		if (num > shellparam.nparam)
-			return 0;
-
-		if (num == 0)
-			ap = arg0;
-		else
-			ap = shellparam.p[num - 1];
-
-		if (nulok && (ap == NULL || *ap == '\0'))
-			return 0;
-	}
-	return 1;
-}
-
-
-
-/*
- * Add the value of a specialized variable to the stack string.
- */
-
-STATIC void
-varvalue(char *name, int quoted, int subtype, int flag)
-{
-	int num;
-	char *p;
-	int i;
-	char sep;
-	char **ap;
-	char const *syntax;
-
-#define STRTODEST(p) \
-	do {\
-	if (flag & (EXP_FULL | EXP_CASE) && subtype != VSLENGTH) { \
-		syntax = quoted? DQSYNTAX : BASESYNTAX; \
-		while (*p) { \
-			if (syntax[(int)*p] == CCTL) \
-				STPUTC(CTLESC, expdest); \
-			STPUTC(*p++, expdest); \
-		} \
-	} else \
-		while (*p) \
-			STPUTC(*p++, expdest); \
-	} while (0)
-
-
-	switch (*name) {
-	case '$':
-		num = rootpid;
-		goto numvar;
-	case '?':
-		num = exitstatus;
-		goto numvar;
-	case '#':
-		num = shellparam.nparam;
-		goto numvar;
-	case '!':
-		num = backgndpid;
-numvar:
-		expdest = cvtnum(num, expdest);
-		break;
-	case '-':
-		for (i = 0; optlist[i].name; i++) {
-			if (optlist[i].val)
-				STPUTC(optlist[i].letter, expdest);
-		}
-		break;
-	case '@':
-		if (flag & EXP_FULL && quoted) {
-			for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-				STRTODEST(p);
-				if (*ap)
-					STPUTC('\0', expdest);
-			}
-			break;
-		}
-		/* fall through */
-	case '*':
-		if (ifsset() != 0)
-			sep = ifsval()[0];
-		else
-			sep = ' ';
-		for (ap = shellparam.p ; (p = *ap++) != NULL ; ) {
-			STRTODEST(p);
-			if (*ap && sep)
-				STPUTC(sep, expdest);
-		}
-		break;
-	case '0':
-		p = arg0;
-		STRTODEST(p);
-		break;
-	default:
-		if (is_digit(*name)) {
-			num = atoi(name);
-			if (num > 0 && num <= shellparam.nparam) {
-				p = shellparam.p[num - 1];
-				STRTODEST(p);
-			}
-		}
-		break;
-	}
-}
-
-
-
-/*
- * Record the fact that we have to scan this region of the
- * string for IFS characters.
- */
-
-STATIC void
-recordregion(int start, int end, int inquotes)
-{
-	struct ifsregion *ifsp;
-
-	if (ifslastp == NULL) {
-		ifsp = &ifsfirst;
-	} else {
-		if (ifslastp->endoff == start
-		    && ifslastp->inquotes == inquotes) {
-			/* extend previous area */
-			ifslastp->endoff = end;
-			return;
-		}
-		ifsp = (struct ifsregion *)ckmalloc(sizeof (struct ifsregion));
-		ifslastp->next = ifsp;
-	}
-	ifslastp = ifsp;
-	ifslastp->next = NULL;
-	ifslastp->begoff = start;
-	ifslastp->endoff = end;
-	ifslastp->inquotes = inquotes;
-}
-
-
-
-/*
- * Break the argument string into pieces based upon IFS and add the
- * strings to the argument list.  The regions of the string to be
- * searched for IFS characters have been stored by recordregion.
- */
-STATIC void
-ifsbreakup(char *string, struct arglist *arglist)
-{
-	struct ifsregion *ifsp;
-	struct strlist *sp;
-	char *start;
-	char *p;
-	char *q;
-	const char *ifs;
-	const char *ifsspc;
-	int inquotes;
-
-	start = string;
-	ifsspc = NULL;
-	inquotes = 0;
-
-	if (ifslastp == NULL) {
-		/* Return entire argument, IFS doesn't apply to any of it */
-		sp = (struct strlist *)stalloc(sizeof *sp);
-		sp->text = start;
-		*arglist->lastp = sp;
-		arglist->lastp = &sp->next;
-		return;
-	}
-
-	ifs = ifsset() ? ifsval() : " \t\n";
-
-	for (ifsp = &ifsfirst; ifsp != NULL; ifsp = ifsp->next) {
-		p = string + ifsp->begoff;
-		inquotes = ifsp->inquotes;
-		ifsspc = NULL;
-		while (p < string + ifsp->endoff) {
-			q = p;
-			if (*p == CTLESC)
-				p++;
-			if (inquotes) {
-				/* Only NULs (probably from "$@") end args */
-				if (*p != 0) {
-					p++;
-					continue;
-				}
-			} else {
-				if (!strchr(ifs, *p)) {
-					p++;
-					continue;
-				}
-				ifsspc = strchr(" \t\n", *p);
-
-				/* Ignore IFS whitespace at start */
-				if (q == start && ifsspc != NULL) {
-					p++;
-					start = p;
-					continue;
-				}
-			}
-
-			/* Save this argument... */
-			*q = '\0';
-			sp = (struct strlist *)stalloc(sizeof *sp);
-			sp->text = start;
-			*arglist->lastp = sp;
-			arglist->lastp = &sp->next;
-			p++;
-
-			if (ifsspc != NULL) {
-				/* Ignore further trailing IFS whitespace */
-				for (; p < string + ifsp->endoff; p++) {
-					q = p;
-					if (*p == CTLESC)
-						p++;
-					if (strchr(ifs, *p) == NULL) {
-						p = q;
-						break;
-					}
-					if (strchr(" \t\n", *p) == NULL) {
-						p++;
-						break;
-					}
-				}
-			}
-			start = p;
-		}
-	}
-
-	/*
-	 * Save anything left as an argument.
-	 * Traditionally we have treated 'IFS=':'; set -- x$IFS' as
-	 * generating 2 arguments, the second of which is empty.
-	 * Some recent clarification of the Posix spec say that it
-	 * should only generate one....
-	 */
-	if (*start /* || (!ifsspc && start > string) */) {
-		sp = (struct strlist *)stalloc(sizeof *sp);
-		sp->text = start;
-		*arglist->lastp = sp;
-		arglist->lastp = &sp->next;
-	}
-}
-
-STATIC void
-ifsfree(void)
-{
-	while (ifsfirst.next != NULL) {
-		struct ifsregion *ifsp;
-		INTOFF;
-		ifsp = ifsfirst.next->next;
-		ckfree(ifsfirst.next);
-		ifsfirst.next = ifsp;
-		INTON;
-	}
-	ifslastp = NULL;
-	ifsfirst.next = NULL;
-}
-
-
-
-/*
- * Expand shell metacharacters.  At this point, the only control characters
- * should be escapes.  The results are stored in the list exparg.
- */
-
-char *expdir;
-
-
-STATIC void
-expandmeta(struct strlist *str, int flag)
-{
-	char *p;
-	struct strlist **savelastp;
-	struct strlist *sp;
-	char c;
-	/* TODO - EXP_REDIR */
-
-	while (str) {
-		if (fflag)
-			goto nometa;
-		p = str->text;
-		for (;;) {			/* fast check for meta chars */
-			if ((c = *p++) == '\0')
-				goto nometa;
-			if (c == '*' || c == '?' || c == '[' || c == '!')
-				break;
-		}
-		savelastp = exparg.lastp;
-		INTOFF;
-		if (expdir == NULL) {
-			int i = strlen(str->text);
-			expdir = ckmalloc(i < 2048 ? 2048 : i); /* XXX */
-		}
-
-		expmeta(expdir, str->text);
-		ckfree(expdir);
-		expdir = NULL;
-		INTON;
-		if (exparg.lastp == savelastp) {
-			/*
-			 * no matches
-			 */
-nometa:
-			*exparg.lastp = str;
-			rmescapes(str->text);
-			exparg.lastp = &str->next;
-		} else {
-			*exparg.lastp = NULL;
-			*savelastp = sp = expsort(*savelastp);
-			while (sp->next != NULL)
-				sp = sp->next;
-			exparg.lastp = &sp->next;
-		}
-		str = str->next;
-	}
-}
-
-
-/*
- * Do metacharacter (i.e. *, ?, [...]) expansion.
- */
-
-STATIC void
-expmeta(char *enddir, char *name)
-{
-	char *p;
-	const char *cp;
-	char *q;
-	char *start;
-	char *endname;
-	int metaflag;
-	struct stat statb;
-	DIR *dirp;
-	struct dirent *dp;
-	int atend;
-	int matchdot;
-
-	metaflag = 0;
-	start = name;
-	for (p = name ; ; p++) {
-		if (*p == '*' || *p == '?')
-			metaflag = 1;
-		else if (*p == '[') {
-			q = p + 1;
-			if (*q == '!')
-				q++;
-			for (;;) {
-				while (*q == CTLQUOTEMARK)
-					q++;
-				if (*q == CTLESC)
-					q++;
-				if (*q == '/' || *q == '\0')
-					break;
-				if (*++q == ']') {
-					metaflag = 1;
-					break;
-				}
-			}
-		} else if (*p == '!' && p[1] == '!'	&& (p == name || p[-1] == '/')) {
-			metaflag = 1;
-		} else if (*p == '\0')
-			break;
-		else if (*p == CTLQUOTEMARK)
-			continue;
-		else if (*p == CTLESC)
-			p++;
-		if (*p == '/') {
-			if (metaflag)
-				break;
-			start = p + 1;
-		}
-	}
-	if (metaflag == 0) {	/* we've reached the end of the file name */
-		if (enddir != expdir)
-			metaflag++;
-		for (p = name ; ; p++) {
-			if (*p == CTLQUOTEMARK)
-				continue;
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p;
-			if (*p == '\0')
-				break;
-		}
-		if (metaflag == 0 || lstat(expdir, &statb) >= 0)
-			addfname(expdir);
-		return;
-	}
-	endname = p;
-	if (start != name) {
-		p = name;
-		while (p < start) {
-			while (*p == CTLQUOTEMARK)
-				p++;
-			if (*p == CTLESC)
-				p++;
-			*enddir++ = *p++;
-		}
-	}
-	if (enddir == expdir) {
-		cp = ".";
-	} else if (enddir == expdir + 1 && *expdir == '/') {
-		cp = "/";
-	} else {
-		cp = expdir;
-		enddir[-1] = '\0';
-	}
-	if ((dirp = opendir(cp)) == NULL)
-		return;
-	if (enddir != expdir)
-		enddir[-1] = '/';
-	if (*endname == 0) {
-		atend = 1;
-	} else {
-		atend = 0;
-		*endname++ = '\0';
-	}
-	matchdot = 0;
-	p = start;
-	while (*p == CTLQUOTEMARK)
-		p++;
-	if (*p == CTLESC)
-		p++;
-	if (*p == '.')
-		matchdot++;
-	while (! int_pending() && (dp = readdir(dirp)) != NULL) {
-		if (dp->d_name[0] == '.' && ! matchdot)
-			continue;
-		if (patmatch(start, dp->d_name, 0)) {
-			if (atend) {
-				scopy(dp->d_name, enddir);
-				addfname(expdir);
-			} else {
-				for (p = enddir, cp = dp->d_name;
-				     (*p++ = *cp++) != '\0';)
-					continue;
-				p[-1] = '/';
-				expmeta(p, endname);
-			}
-		}
-	}
-	closedir(dirp);
-	if (! atend)
-		endname[-1] = '/';
-}
-
-
-/*
- * Add a file name to the list.
- */
-
-STATIC void
-addfname(char *name)
-{
-	char *p;
-	struct strlist *sp;
-
-	p = stalloc(strlen(name) + 1);
-	scopy(name, p);
-	sp = (struct strlist *)stalloc(sizeof *sp);
-	sp->text = p;
-	*exparg.lastp = sp;
-	exparg.lastp = &sp->next;
-}
-
-
-/*
- * Sort the results of file name expansion.  It calculates the number of
- * strings to sort and then calls msort (short for merge sort) to do the
- * work.
- */
-
-STATIC struct strlist *
-expsort(struct strlist *str)
-{
-	int len;
-	struct strlist *sp;
-
-	len = 0;
-	for (sp = str ; sp ; sp = sp->next)
-		len++;
-	return msort(str, len);
-}
-
-
-STATIC struct strlist *
-msort(struct strlist *list, int len)
-{
-	struct strlist *p, *q = NULL;
-	struct strlist **lpp;
-	int half;
-	int n;
-
-	if (len <= 1)
-		return list;
-	half = len >> 1;
-	p = list;
-	for (n = half ; --n >= 0 ; ) {
-		q = p;
-		p = p->next;
-	}
-	q->next = NULL;			/* terminate first half of list */
-	q = msort(list, half);		/* sort first half of list */
-	p = msort(p, len - half);		/* sort second half */
-	lpp = &list;
-	for (;;) {
-		if (strcmp(p->text, q->text) < 0) {
-			*lpp = p;
-			lpp = &p->next;
-			if ((p = *lpp) == NULL) {
-				*lpp = q;
-				break;
-			}
-		} else {
-			*lpp = q;
-			lpp = &q->next;
-			if ((q = *lpp) == NULL) {
-				*lpp = p;
-				break;
-			}
-		}
-	}
-	return list;
-}
-
-
-
-/*
- * Returns true if the pattern matches the string.
- */
-
-int
-patmatch(char *pattern, char *string, int squoted)
-{
-#ifdef notdef
-	if (pattern[0] == '!' && pattern[1] == '!')
-		return 1 - pmatch(pattern + 2, string);
-	else
-#endif
-		return pmatch(pattern, string, squoted);
-}
-
-
-STATIC int
-pmatch(char *pattern, char *string, int squoted)
-{
-	char *p, *q;
-	char c;
-
-	p = pattern;
-	q = string;
-	for (;;) {
-		switch (c = *p++) {
-		case '\0':
-			goto breakloop;
-		case CTLESC:
-			if (squoted && *q == CTLESC)
-				q++;
-			if (*q++ != *p++)
-				return 0;
-			break;
-		case CTLQUOTEMARK:
-			continue;
-		case '?':
-			if (squoted && *q == CTLESC)
-				q++;
-			if (*q++ == '\0')
-				return 0;
-			break;
-		case '*':
-			c = *p;
-			while (c == CTLQUOTEMARK || c == '*')
-				c = *++p;
-			if (c != CTLESC &&  c != CTLQUOTEMARK &&
-			    c != '?' && c != '*' && c != '[') {
-				while (*q != c) {
-					if (squoted && *q == CTLESC &&
-					    q[1] == c)
-						break;
-					if (*q == '\0')
-						return 0;
-					if (squoted && *q == CTLESC)
-						q++;
-					q++;
-				}
-			}
-			do {
-				if (pmatch(p, q, squoted))
-					return 1;
-				if (squoted && *q == CTLESC)
-					q++;
-			} while (*q++ != '\0');
-			return 0;
-		case '[': {
-			char *endp;
-			int invert, found;
-			char chr;
-
-			endp = p;
-			if (*endp == '!')
-				endp++;
-			for (;;) {
-				while (*endp == CTLQUOTEMARK)
-					endp++;
-				if (*endp == '\0')
-					goto dft;		/* no matching ] */
-				if (*endp == CTLESC)
-					endp++;
-				if (*++endp == ']')
-					break;
-			}
-			invert = 0;
-			if (*p == '!') {
-				invert++;
-				p++;
-			}
-			found = 0;
-			chr = *q++;
-			if (squoted && chr == CTLESC)
-				chr = *q++;
-			if (chr == '\0')
-				return 0;
-			c = *p++;
-			do {
-				if (c == CTLQUOTEMARK)
-					continue;
-				if (c == CTLESC)
-					c = *p++;
-				if (*p == '-' && p[1] != ']') {
-					p++;
-					while (*p == CTLQUOTEMARK)
-						p++;
-					if (*p == CTLESC)
-						p++;
-					if (chr >= c && chr <= *p)
-						found = 1;
-					p++;
-				} else {
-					if (chr == c)
-						found = 1;
-				}
-			} while ((c = *p++) != ']');
-			if (found == invert)
-				return 0;
-			break;
-		}
-dft:	        default:
-			if (squoted && *q == CTLESC)
-				q++;
-			if (*q++ != c)
-				return 0;
-			break;
-		}
-	}
-breakloop:
-	if (*q != '\0')
-		return 0;
-	return 1;
-}
-
-
-
-/*
- * Remove any CTLESC characters from a string.
- */
-
-void
-rmescapes(char *str)
-{
-	char *p, *q;
-
-	p = str;
-	while (*p != CTLESC && *p != CTLQUOTEMARK) {
-		if (*p++ == '\0')
-			return;
-	}
-	q = p;
-	while (*p) {
-		if (*p == CTLQUOTEMARK) {
-			p++;
-			continue;
-		}
-		if (*p == CTLESC)
-			p++;
-		*q++ = *p++;
-	}
-	*q = '\0';
-}
-
-
-
-/*
- * See if a pattern matches in a case statement.
- */
-
-int
-casematch(union node *pattern, char *val)
-{
-	struct stackmark smark;
-	int result;
-	char *p;
-
-	setstackmark(&smark);
-	argbackq = pattern->narg.backquote;
-	STARTSTACKSTR(expdest);
-	ifslastp = NULL;
-	argstr(pattern->narg.text, EXP_TILDE | EXP_CASE);
-	STPUTC('\0', expdest);
-	p = grabstackstr(expdest);
-	result = patmatch(p, val, 0);
-	popstackmark(&smark);
-	return result;
-}
-
-/*
- * Our own itoa().
- */
-
-STATIC char *
-cvtnum(int num, char *buf)
-{
-	char temp[32];
-	int neg = num < 0;
-	char *p = temp + 31;
-
-	temp[31] = '\0';
-
-	do {
-		*--p = num % 10 + '0';
-	} while ((num /= 10) != 0);
-
-	if (neg)
-		*--p = '-';
-
-	while (*p)
-		STPUTC(*p++, buf);
-	return buf;
-}
-
-/*
- * Do most of the work for wordexp(3).
- */
-
-int
-wordexpcmd(int argc, char **argv)
-{
-	size_t len;
-	int i;
-
-	out1fmt("%d", argc - 1);
-	out1c('\0');
-	for (i = 1, len = 0; i < argc; i++)
-		len += strlen(argv[i]);
-	out1fmt("%zd", len);
-	out1c('\0');
-	for (i = 1; i < argc; i++) {
-		out1str(argv[i]);
-		out1c('\0');
-	}
-	return (0);
-}
diff --git a/sh/expand.h b/sh/expand.h
deleted file mode 100644
index 1ea876d..0000000
--- a/sh/expand.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*	$NetBSD: expand.h,v 1.16 2004/07/13 15:05:59 seb Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)expand.h	8.2 (Berkeley) 5/4/95
- */
-
-struct strlist {
-	struct strlist *next;
-	char *text;
-};
-
-
-struct arglist {
-	struct strlist *list;
-	struct strlist **lastp;
-};
-
-/*
- * expandarg() flags
- */
-#define EXP_FULL	0x1	/* perform word splitting & file globbing */
-#define EXP_TILDE	0x2	/* do normal tilde expansion */
-#define	EXP_VARTILDE	0x4	/* expand tildes in an assignment */
-#define	EXP_REDIR	0x8	/* file glob for a redirection (1 match only) */
-#define EXP_CASE	0x10	/* keeps quotes around for CASE pattern */
-#define EXP_IFS_SPLIT	0x20	/* need to record arguments for ifs breakup */
-
-
-union node;
-void expandhere(union node *, int);
-void expandarg(union node *, struct arglist *, int);
-void expari(int);
-int patmatch(char *, char *, int);
-void rmescapes(char *);
-int casematch(union node *, char *);
-int wordexpcmd(int, char **);
-
-/* From arith.y */
-int arith(const char *);
-int expcmd(int , char **);
-void arith_lex_reset(void);
-int yylex(void);
diff --git a/sh/funcs/cmv b/sh/funcs/cmv
deleted file mode 100644
index 667f846..0000000
--- a/sh/funcs/cmv
+++ /dev/null
@@ -1,50 +0,0 @@
-#	$NetBSD: cmv,v 1.7 1995/05/11 21:31:05 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)cmv	8.2 (Berkeley) 5/4/95
-
-# Conditional move--don't replace an existing file.
-
-cmv() {
-	if test $# != 2
-	then	echo "cmv: arg count"
-		return 2
-	fi
-	if test -f "$2" -o -w "$2"
-	then	echo "$2 exists"
-		return 2
-	fi
-	/bin/mv "$1" "$2"
-}
diff --git a/sh/funcs/dirs b/sh/funcs/dirs
deleted file mode 100644
index 68bb317..0000000
--- a/sh/funcs/dirs
+++ /dev/null
@@ -1,74 +0,0 @@
-#	$NetBSD: dirs,v 1.7 1995/05/11 21:31:08 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)dirs	8.2 (Berkeley) 5/4/95
-
-# pushd, popd, and dirs --- written by Chris Bertin
-# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
-# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
-
-pushd () {
-	SAVE=`pwd`
-	if [ "$1" = "" ] 
-	then	if [ "$DSTACK" = "" ]
-		then	echo "pushd: directory stack empty."
-			return 1
-		fi
-		set $DSTACK
-		cd $1 || return
-		shift 1
-		DSTACK="$*"
-	else	cd $1 > /dev/null || return
-	fi
-	DSTACK="$SAVE $DSTACK"
-	dirs
-}
-
-popd () {
-	if [ "$DSTACK" = "" ] 
-	then	echo "popd: directory stack empty."
-		return 1
-	fi
-	set $DSTACK
-	cd $1
-	shift
-	DSTACK=$*
-	dirs
-}
-
-dirs () {
-	echo "`pwd` $DSTACK"
-	return 0
-}
diff --git a/sh/funcs/kill b/sh/funcs/kill
deleted file mode 100644
index 75b0180..0000000
--- a/sh/funcs/kill
+++ /dev/null
@@ -1,50 +0,0 @@
-#	$NetBSD: kill,v 1.7 1995/05/11 21:31:10 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)kill	8.2 (Berkeley) 5/4/95
-
-# Convert job names to process ids and then run /bin/kill.
-
-kill() {
-	local args x
-	args=
-	for x in "$@"
-	do	case $x in
-		%*)	x=`jobid "$x"` ;;
-		esac
-		args="$args $x"
-	done
-	/bin/kill $args
-}
diff --git a/sh/funcs/login b/sh/funcs/login
deleted file mode 100644
index 7ae08b2..0000000
--- a/sh/funcs/login
+++ /dev/null
@@ -1,39 +0,0 @@
-#	$NetBSD: login,v 1.7 1995/05/11 21:31:11 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)login	8.2 (Berkeley) 5/4/95
-
-# replaces the login builtin in the BSD shell
-login () exec login "$@"
diff --git a/sh/funcs/newgrp b/sh/funcs/newgrp
deleted file mode 100644
index 796a4f1..0000000
--- a/sh/funcs/newgrp
+++ /dev/null
@@ -1,38 +0,0 @@
-#	$NetBSD: newgrp,v 1.7 1995/05/11 21:31:12 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)newgrp	8.2 (Berkeley) 5/4/95
-
-newgrp() exec newgrp "$@"
diff --git a/sh/funcs/popd b/sh/funcs/popd
deleted file mode 100644
index b2b65d5..0000000
--- a/sh/funcs/popd
+++ /dev/null
@@ -1,74 +0,0 @@
-#	$NetBSD: popd,v 1.7 1995/05/11 21:31:13 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)popd	8.2 (Berkeley) 5/4/95
-
-# pushd, popd, and dirs --- written by Chris Bertin
-# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
-# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
-
-pushd () {
-	SAVE=`pwd`
-	if [ "$1" = "" ] 
-	then	if [ "$DSTACK" = "" ]
-		then	echo "pushd: directory stack empty."
-			return 1
-		fi
-		set $DSTACK
-		cd $1 || return
-		shift 1
-		DSTACK="$*"
-	else	cd $1 > /dev/null || return
-	fi
-	DSTACK="$SAVE $DSTACK"
-	dirs
-}
-
-popd () {
-	if [ "$DSTACK" = "" ] 
-	then	echo "popd: directory stack empty."
-		return 1
-	fi
-	set $DSTACK
-	cd $1
-	shift
-	DSTACK=$*
-	dirs
-}
-
-dirs () {
-	echo "`pwd` $DSTACK"
-	return 0
-}
diff --git a/sh/funcs/pushd b/sh/funcs/pushd
deleted file mode 100644
index b393038..0000000
--- a/sh/funcs/pushd
+++ /dev/null
@@ -1,74 +0,0 @@
-#	$NetBSD: pushd,v 1.7 1995/05/11 21:31:15 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)pushd	8.2 (Berkeley) 5/4/95
-
-# pushd, popd, and dirs --- written by Chris Bertin
-# Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris
-# as modified by Patrick Elam of GTRI and Kenneth Almquist at UW
-
-pushd () {
-	SAVE=`pwd`
-	if [ "$1" = "" ] 
-	then	if [ "$DSTACK" = "" ]
-		then	echo "pushd: directory stack empty."
-			return 1
-		fi
-		set $DSTACK
-		cd $1 || return
-		shift 1
-		DSTACK="$*"
-	else	cd $1 > /dev/null || return
-	fi
-	DSTACK="$SAVE $DSTACK"
-	dirs
-}
-
-popd () {
-	if [ "$DSTACK" = "" ] 
-	then	echo "popd: directory stack empty."
-		return 1
-	fi
-	set $DSTACK
-	cd $1
-	shift
-	DSTACK=$*
-	dirs
-}
-
-dirs () {
-	echo "`pwd` $DSTACK"
-	return 0
-}
diff --git a/sh/funcs/suspend b/sh/funcs/suspend
deleted file mode 100644
index 8a4197d..0000000
--- a/sh/funcs/suspend
+++ /dev/null
@@ -1,42 +0,0 @@
-#	$NetBSD: suspend,v 1.7 1995/05/11 21:31:17 christos Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. All advertising materials mentioning features or use of this software
-#    must display the following acknowledgement:
-#	This product includes software developed by the University of
-#	California, Berkeley and its contributors.
-# 4. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)suspend	8.2 (Berkeley) 5/4/95
-
-suspend() {
-	local -
-	set +j
-	kill -TSTP 0
-}
diff --git a/sh/histedit.c b/sh/histedit.c
deleted file mode 100644
index 4bb2b34..0000000
--- a/sh/histedit.c
+++ /dev/null
@@ -1,540 +0,0 @@
-/*	$NetBSD: histedit.c,v 1.34 2003/10/27 06:19:29 lukem Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)histedit.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: histedit.c,v 1.34 2003/10/27 06:19:29 lukem Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/param.h>
-#include <paths.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-/*
- * Editline and history functions (and glue).
- */
-#include "shell.h"
-#include "parser.h"
-#include "var.h"
-#include "options.h"
-#include "main.h"
-#include "output.h"
-#include "mystring.h"
-#include "myhistedit.h"
-#include "error.h"
-#ifndef SMALL
-#include "eval.h"
-#include "memalloc.h"
-
-#define MAXHISTLOOPS	4	/* max recursions through fc */
-#define DEFEDITOR	"ed"	/* default editor *should* be $EDITOR */
-
-History *hist;	/* history cookie */
-EditLine *el;	/* editline cookie */
-int displayhist;
-static FILE *el_in, *el_out;
-
-STATIC const char *fc_replace(const char *, char *, char *);
-
-#ifdef DEBUG
-extern FILE *tracefile;
-#endif
-
-/*
- * Set history and editing status.  Called whenever the status may
- * have changed (figures out what to do).
- */
-void
-histedit(void)
-{
-	FILE *el_err;
-
-#define editing (Eflag || Vflag)
-
-	if (iflag) {
-		if (!hist) {
-			/*
-			 * turn history on
-			 */
-			INTOFF;
-			hist = history_init();
-			INTON;
-
-			if (hist != NULL)
-				sethistsize(histsizeval());
-			else
-				out2str("sh: can't initialize history\n");
-		}
-		if (editing && !el && isatty(0)) { /* && isatty(2) ??? */
-			/*
-			 * turn editing on
-			 */
-			char *term, *shname;
-
-			INTOFF;
-			if (el_in == NULL)
-				el_in = fdopen(0, "r");
-			if (el_out == NULL)
-				el_out = fdopen(2, "w");
-			if (el_in == NULL || el_out == NULL)
-				goto bad;
-			el_err = el_out;
-#if DEBUG
-			if (tracefile)
-				el_err = tracefile;
-#endif
-			term = lookupvar("TERM");
-			if (term)
-				setenv("TERM", term, 1);
-			else
-				unsetenv("TERM");
-			shname = arg0;
-			if (shname[0] == '-')
-				shname++;
-			el = el_init(shname, el_in, el_out, el_err);
-			if (el != NULL) {
-				if (hist)
-					el_set(el, EL_HIST, history, hist);
-				el_set(el, EL_PROMPT, getprompt);
-				el_set(el, EL_SIGNAL, 1);
-			} else {
-bad:
-				out2str("sh: can't initialize editing\n");
-			}
-			INTON;
-		} else if (!editing && el) {
-			INTOFF;
-			el_end(el);
-			el = NULL;
-			INTON;
-		}
-		if (el) {
-			if (Vflag)
-				el_set(el, EL_EDITOR, "vi");
-			else if (Eflag)
-				el_set(el, EL_EDITOR, "emacs");
-			el_source(el, NULL);
-		}
-	} else {
-		INTOFF;
-		if (el) {	/* no editing if not interactive */
-			el_end(el);
-			el = NULL;
-		}
-		if (hist) {
-			history_end(hist);
-			hist = NULL;
-		}
-		INTON;
-	}
-}
-
-
-void
-sethistsize(const char *hs)
-{
-	int histsize;
-	HistEvent he;
-
-	if (hist != NULL) {
-		if (hs == NULL || *hs == '\0' ||
-		   (histsize = atoi(hs)) < 0)
-			histsize = 100;
-		history(hist, &he, H_SETSIZE, histsize);
-	}
-}
-
-void
-setterm(const char *term)
-{
-	if (el != NULL && term != NULL)
-		if (el_set(el, EL_TERMINAL, term) != 0) {
-			outfmt(out2, "sh: Can't set terminal type %s\n", term);
-			outfmt(out2, "sh: Using dumb terminal settings.\n");
-		}
-}
-
-int
-inputrc(argc, argv)
-	int argc;
-	char **argv;
-{
-	if (argc != 2) {
-		out2str("usage: inputrc file\n");
-		return 1;
-	}
-	if (el != NULL) {
-		if (el_source(el, argv[1])) {
-			out2str("inputrc: failed\n");
-			return 1;
-		} else
-			return 0;
-	} else {
-		out2str("sh: inputrc ignored, not editing\n");
-		return 1;
-	}
-}
-
-/*
- *  This command is provided since POSIX decided to standardize
- *  the Korn shell fc command.  Oh well...
- */
-int
-histcmd(int argc, char **argv)
-{
-	int ch;
-	const char *editor = NULL;
-	HistEvent he;
-	int lflg = 0, nflg = 0, rflg = 0, sflg = 0;
-	int i, retval;
-	const char *firststr, *laststr;
-	int first, last, direction;
-	char *pat = NULL, *repl;	/* ksh "fc old=new" crap */
-	static int active = 0;
-	struct jmploc jmploc;
-	struct jmploc *volatile savehandler;
-	char editfile[MAXPATHLEN + 1];
-	FILE *efp;
-#ifdef __GNUC__
-	/* Avoid longjmp clobbering */
-	(void) &editor;
-	(void) &lflg;
-	(void) &nflg;
-	(void) &rflg;
-	(void) &sflg;
-	(void) &firststr;
-	(void) &laststr;
-	(void) &pat;
-	(void) &repl;
-	(void) &efp;
-	(void) &argc;
-	(void) &argv;
-#endif
-
-	if (hist == NULL)
-		error("history not active");
-
-	if (argc == 1)
-		error("missing history argument");
-
-	optreset = 1; optind = 1; /* initialize getopt */
-	while (not_fcnumber(argv[optind]) &&
-	      (ch = getopt(argc, argv, ":e:lnrs")) != -1)
-		switch ((char)ch) {
-		case 'e':
-			editor = optionarg;
-			break;
-		case 'l':
-			lflg = 1;
-			break;
-		case 'n':
-			nflg = 1;
-			break;
-		case 'r':
-			rflg = 1;
-			break;
-		case 's':
-			sflg = 1;
-			break;
-		case ':':
-			error("option -%c expects argument", optopt);
-			/* NOTREACHED */
-		case '?':
-		default:
-			error("unknown option: -%c", optopt);
-			/* NOTREACHED */
-		}
-	argc -= optind, argv += optind;
-
-	/*
-	 * If executing...
-	 */
-	if (lflg == 0 || editor || sflg) {
-		lflg = 0;	/* ignore */
-		editfile[0] = '\0';
-		/*
-		 * Catch interrupts to reset active counter and
-		 * cleanup temp files.
-		 */
-		if (setjmp(jmploc.loc)) {
-			active = 0;
-			if (*editfile)
-				unlink(editfile);
-			handler = savehandler;
-			longjmp(handler->loc, 1);
-		}
-		savehandler = handler;
-		handler = &jmploc;
-		if (++active > MAXHISTLOOPS) {
-			active = 0;
-			displayhist = 0;
-			error("called recursively too many times");
-		}
-		/*
-		 * Set editor.
-		 */
-		if (sflg == 0) {
-			if (editor == NULL &&
-			    (editor = bltinlookup("FCEDIT", 1)) == NULL &&
-			    (editor = bltinlookup("EDITOR", 1)) == NULL)
-				editor = DEFEDITOR;
-			if (editor[0] == '-' && editor[1] == '\0') {
-				sflg = 1;	/* no edit */
-				editor = NULL;
-			}
-		}
-	}
-
-	/*
-	 * If executing, parse [old=new] now
-	 */
-	if (lflg == 0 && argc > 0 &&
-	     ((repl = strchr(argv[0], '=')) != NULL)) {
-		pat = argv[0];
-		*repl++ = '\0';
-		argc--, argv++;
-	}
-	/*
-	 * determine [first] and [last]
-	 */
-	switch (argc) {
-	case 0:
-		firststr = lflg ? "-16" : "-1";
-		laststr = "-1";
-		break;
-	case 1:
-		firststr = argv[0];
-		laststr = lflg ? "-1" : argv[0];
-		break;
-	case 2:
-		firststr = argv[0];
-		laststr = argv[1];
-		break;
-	default:
-		error("too many args");
-		/* NOTREACHED */
-	}
-	/*
-	 * Turn into event numbers.
-	 */
-	first = str_to_event(firststr, 0);
-	last = str_to_event(laststr, 1);
-
-	if (rflg) {
-		i = last;
-		last = first;
-		first = i;
-	}
-	/*
-	 * XXX - this should not depend on the event numbers
-	 * always increasing.  Add sequence numbers or offset
-	 * to the history element in next (diskbased) release.
-	 */
-	direction = first < last ? H_PREV : H_NEXT;
-
-	/*
-	 * If editing, grab a temp file.
-	 */
-	if (editor) {
-		int fd;
-		INTOFF;		/* easier */
-		snprintf(editfile, sizeof(editfile), "%s_shXXXXXX", _PATH_TMP);
-		if ((fd = mkstemp(editfile)) < 0)
-			error("can't create temporary file %s", editfile);
-		if ((efp = fdopen(fd, "w")) == NULL) {
-			close(fd);
-			error("can't allocate stdio buffer for temp");
-		}
-	}
-
-	/*
-	 * Loop through selected history events.  If listing or executing,
-	 * do it now.  Otherwise, put into temp file and call the editor
-	 * after.
-	 *
-	 * The history interface needs rethinking, as the following
-	 * convolutions will demonstrate.
-	 */
-	history(hist, &he, H_FIRST);
-	retval = history(hist, &he, H_NEXT_EVENT, first);
-	for (;retval != -1; retval = history(hist, &he, direction)) {
-		if (lflg) {
-			if (!nflg)
-				out1fmt("%5d ", he.num);
-			out1str(he.str);
-		} else {
-			const char *s = pat ?
-			   fc_replace(he.str, pat, repl) : he.str;
-
-			if (sflg) {
-				if (displayhist) {
-					out2str(s);
-				}
-
-				evalstring(strcpy(stalloc(strlen(s) + 1), s), 0);
-				if (displayhist && hist) {
-					/*
-					 *  XXX what about recursive and
-					 *  relative histnums.
-					 */
-					history(hist, &he, H_ENTER, s);
-				}
-			} else
-				fputs(s, efp);
-		}
-		/*
-		 * At end?  (if we were to lose last, we'd sure be
-		 * messed up).
-		 */
-		if (he.num == last)
-			break;
-	}
-	if (editor) {
-		char *editcmd;
-
-		fclose(efp);
-		editcmd = stalloc(strlen(editor) + strlen(editfile) + 2);
-		sprintf(editcmd, "%s %s", editor, editfile);
-		evalstring(editcmd, 0);	/* XXX - should use no JC command */
-		INTON;
-		readcmdfile(editfile);	/* XXX - should read back - quick tst */
-		unlink(editfile);
-	}
-
-	if (lflg == 0 && active > 0)
-		--active;
-	if (displayhist)
-		displayhist = 0;
-	return 0;
-}
-
-STATIC const char *
-fc_replace(const char *s, char *p, char *r)
-{
-	char *dest;
-	int plen = strlen(p);
-
-	STARTSTACKSTR(dest);
-	while (*s) {
-		if (*s == *p && strncmp(s, p, plen) == 0) {
-			while (*r)
-				STPUTC(*r++, dest);
-			s += plen;
-			*p = '\0';	/* so no more matches */
-		} else
-			STPUTC(*s++, dest);
-	}
-	STACKSTRNUL(dest);
-	dest = grabstackstr(dest);
-
-	return (dest);
-}
-
-int
-not_fcnumber(char *s)
-{
-	if (s == NULL)
-		return 0;
-        if (*s == '-')
-                s++;
-	return (!is_number(s));
-}
-
-int
-str_to_event(const char *str, int last)
-{
-	HistEvent he;
-	const char *s = str;
-	int relative = 0;
-	int i, retval;
-
-	retval = history(hist, &he, H_FIRST);
-	switch (*s) {
-	case '-':
-		relative = 1;
-		/*FALLTHROUGH*/
-	case '+':
-		s++;
-	}
-	if (is_number(s)) {
-		i = atoi(s);
-		if (relative) {
-			while (retval != -1 && i--) {
-				retval = history(hist, &he, H_NEXT);
-			}
-			if (retval == -1)
-				retval = history(hist, &he, H_LAST);
-		} else {
-			retval = history(hist, &he, H_NEXT_EVENT, i);
-			if (retval == -1) {
-				/*
-				 * the notion of first and last is
-				 * backwards to that of the history package
-				 */
-				retval = history(hist, &he,
-						last ? H_FIRST : H_LAST);
-			}
-		}
-		if (retval == -1)
-			error("history number %s not found (internal error)",
-			       str);
-	} else {
-		/*
-		 * pattern
-		 */
-		retval = history(hist, &he, H_PREV_STR, str);
-		if (retval == -1)
-			error("history pattern not found: %s", str);
-	}
-	return (he.num);
-}
-#else
-int
-histcmd(int argc, char **argv)
-{
-	error("not compiled with history support");
-	/* NOTREACHED */
-}
-int
-inputrc(int argc, char **argv)
-{
-	error("not compiled with history support");
-	/* NOTREACHED */
-}
-#endif
diff --git a/sh/init.c b/sh/init.c
deleted file mode 100644
index 55ad172..0000000
--- a/sh/init.c
+++ /dev/null
@@ -1,1090 +0,0 @@
-/*
- * This file was generated by the mkinit program.
- */
-
-#include "shell.h"
-#include "mystring.h"
-#include "init.h"
-#include "eval.h"
-#include <stdio.h>
-#include "input.h"
-#include "error.h"
-#include <stdlib.h>
-#include "options.h"
-#include "redir.h"
-#include <signal.h>
-#include "trap.h"
-#include "output.h"
-#include "memalloc.h"
-#include "var.h"
-
-
-
-#undef  ATABSIZE
-#define ATABSIZE 39
-#undef  YYBISON
-#define YYBISON 1
-#undef  YYSKELETON_NAME
-#define YYSKELETON_NAME "yacc.c"
-#undef  YYPURE
-#define YYPURE 0
-#undef  YYLSP_NEEDED
-#define YYLSP_NEEDED 0
-#undef  ARITH_NUM
-#define ARITH_NUM 258
-#undef  ARITH_LPAREN
-#define ARITH_LPAREN 259
-#undef  ARITH_RPAREN
-#define ARITH_RPAREN 260
-#undef  ARITH_OR
-#define ARITH_OR 261
-#undef  ARITH_AND
-#define ARITH_AND 262
-#undef  ARITH_BOR
-#define ARITH_BOR 263
-#undef  ARITH_BXOR
-#define ARITH_BXOR 264
-#undef  ARITH_BAND
-#define ARITH_BAND 265
-#undef  ARITH_NE
-#define ARITH_NE 266
-#undef  ARITH_EQ
-#define ARITH_EQ 267
-#undef  ARITH_LE
-#define ARITH_LE 268
-#undef  ARITH_GE
-#define ARITH_GE 269
-#undef  ARITH_GT
-#define ARITH_GT 270
-#undef  ARITH_LT
-#define ARITH_LT 271
-#undef  ARITH_RSHIFT
-#define ARITH_RSHIFT 272
-#undef  ARITH_LSHIFT
-#define ARITH_LSHIFT 273
-#undef  ARITH_SUB
-#define ARITH_SUB 274
-#undef  ARITH_ADD
-#define ARITH_ADD 275
-#undef  ARITH_REM
-#define ARITH_REM 276
-#undef  ARITH_DIV
-#define ARITH_DIV 277
-#undef  ARITH_MUL
-#define ARITH_MUL 278
-#undef  ARITH_BNOT
-#define ARITH_BNOT 279
-#undef  ARITH_NOT
-#define ARITH_NOT 280
-#undef  ARITH_UNARYPLUS
-#define ARITH_UNARYPLUS 281
-#undef  ARITH_UNARYMINUS
-#define ARITH_UNARYMINUS 282
-#undef  YYFINAL
-#define YYFINAL  14
-#undef  YYLAST
-#define YYLAST   170
-#undef  YYNTOKENS
-#define YYNTOKENS  28
-#undef  YYNNTS
-#define YYNNTS  3
-#undef  YYNRULES
-#define YYNRULES  26
-#undef  YYNSTATES
-#define YYNSTATES  52
-#undef  YYUNDEFTOK
-#define YYUNDEFTOK  2
-#undef  YYMAXUTOK
-#define YYMAXUTOK   282
-#undef  YYPACT_NINF
-#define YYPACT_NINF -13
-#undef  YYTABLE_NINF
-#define YYTABLE_NINF -1
-#undef  yyerrok
-#define yyerrok		(yyerrstatus = 0)
-#undef  yyclearin
-#define yyclearin	(yychar = YYEMPTY)
-#undef  YYEMPTY
-#define YYEMPTY		(-2)
-#undef  YYEOF
-#define YYEOF		0
-#undef  YYACCEPT
-#define YYACCEPT	goto yyacceptlab
-#undef  YYABORT
-#define YYABORT		goto yyabortlab
-#undef  YYERROR
-#define YYERROR		goto yyerrorlab
-#undef  YYFAIL
-#define YYFAIL		goto yyerrlab
-#undef  YYTERROR
-#define YYTERROR	1
-#undef  YYERRCODE
-#define YYERRCODE	256
-#undef  YYPOPSTACK
-#define YYPOPSTACK   (yyvsp--, yyssp--)
-#undef  YY_INT_ALIGNED
-#define  YY_INT_ALIGNED short int
-#undef  FLEX_SCANNER
-#define FLEX_SCANNER
-#undef  YY_FLEX_MAJOR_VERSION
-#define YY_FLEX_MAJOR_VERSION 2
-#undef  YY_FLEX_MINOR_VERSION
-#define YY_FLEX_MINOR_VERSION 5
-#undef  YY_FLEX_SUBMINOR_VERSION
-#define YY_FLEX_SUBMINOR_VERSION 31
-#undef  FLEX_BETA
-#define FLEX_BETA
-#undef  FLEXINT_H
-#define FLEXINT_H
-#undef  INT8_MIN
-#define INT8_MIN               (-128)
-#undef  INT16_MIN
-#define INT16_MIN              (-32767-1)
-#undef  INT32_MIN
-#define INT32_MIN              (-2147483647-1)
-#undef  INT8_MAX
-#define INT8_MAX               (127)
-#undef  INT16_MAX
-#define INT16_MAX              (32767)
-#undef  INT32_MAX
-#define INT32_MAX              (2147483647)
-#undef  UINT8_MAX
-#define UINT8_MAX              (255U)
-#undef  UINT16_MAX
-#define UINT16_MAX             (65535U)
-#undef  UINT32_MAX
-#define UINT32_MAX             (4294967295U)
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  yyconst
-#define yyconst const
-#undef  yyconst
-#define yyconst
-#undef  YY_NULL
-#define YY_NULL 0
-#undef  BEGIN
-#define BEGIN (yy_start) = 1 + 2 *
-#undef  YY_START
-#define YY_START (((yy_start) - 1) / 2)
-#undef  YYSTATE
-#define YYSTATE YY_START
-#undef  YY_NEW_FILE
-#define YY_NEW_FILE yyrestart(yyin  )
-#undef  YY_END_OF_BUFFER_CHAR
-#define YY_END_OF_BUFFER_CHAR 0
-#undef  YY_BUF_SIZE
-#define YY_BUF_SIZE 16384
-#undef  YY_TYPEDEF_YY_BUFFER_STATE
-#define YY_TYPEDEF_YY_BUFFER_STATE
-#undef  EOB_ACT_CONTINUE_SCAN
-#define EOB_ACT_CONTINUE_SCAN 0
-#undef  EOB_ACT_END_OF_FILE
-#define EOB_ACT_END_OF_FILE 1
-#undef  EOB_ACT_LAST_MATCH
-#define EOB_ACT_LAST_MATCH 2
-#undef  YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-#undef  YY_STRUCT_YY_BUFFER_STATE
-#define YY_STRUCT_YY_BUFFER_STATE
-#undef  YY_BUFFER_NEW
-#define YY_BUFFER_NEW 0
-#undef  YY_BUFFER_NORMAL
-#define YY_BUFFER_NORMAL 1
-#undef  YY_BUFFER_EOF_PENDING
-#define YY_BUFFER_EOF_PENDING 2
-#undef  YY_CURRENT_BUFFER
-#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
-#undef  YY_CURRENT_BUFFER_LVALUE
-#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
-#undef  YY_FLUSH_BUFFER
-#define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER )
-#undef  yy_new_buffer
-#define yy_new_buffer yy_create_buffer
-#undef  YY_SKIP_YYWRAP
-#define YY_SKIP_YYWRAP
-#undef  yytext_ptr
-#define yytext_ptr yytext
-#undef  YY_DO_BEFORE_ACTION
-#define YY_DO_BEFORE_ACTION \
-#undef  YY_NUM_RULES
-#define YY_NUM_RULES 29
-#undef  YY_END_OF_BUFFER
-#define YY_END_OF_BUFFER 30
-#undef  REJECT
-#define REJECT reject_used_but_not_detected
-#undef  YY_MORE_ADJ
-#define YY_MORE_ADJ 0
-#undef  YY_RESTORE_YY_MORE_OFFSET
-#define YY_RESTORE_YY_MORE_OFFSET
-#undef  YY_NO_UNPUT
-#define YY_NO_UNPUT
-#undef  INITIAL
-#define INITIAL 0
-#undef  YY_EXTRA_TYPE
-#define YY_EXTRA_TYPE void *
-#undef  YY_READ_BUF_SIZE
-#define YY_READ_BUF_SIZE 8192
-#undef  ECHO
-#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
-#undef  YY_START_STACK_INCR
-#define YY_START_STACK_INCR 25
-#undef  YY_DECL_IS_OURS
-#define YY_DECL_IS_OURS 1
-#undef  YY_DECL
-#define YY_DECL int yylex (void)
-#undef  YY_USER_ACTION
-#define YY_USER_ACTION
-#undef  YY_BREAK
-#define YY_BREAK break;
-#undef  YY_RULE_SETUP
-#define YY_RULE_SETUP \
-#undef  YY_EXIT_FAILURE
-#define YY_EXIT_FAILURE 2
-#undef  YYTABLES_NAME
-#define YYTABLES_NAME "yytables"
-#undef  MAXPWD
-#define MAXPWD 256
-#undef  signal
-#define signal bsd_signal
-#undef  ALL
-#define ALL (E_OPEN|E_CREAT|E_EXEC)
-#undef  EV_EXIT
-#define EV_EXIT 01		/* exit after evaluating tree */
-#undef  EV_TESTED
-#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
-#undef  EV_BACKCMD
-#define EV_BACKCMD 04		/* command executing within back quotes */
-#undef  CMDTABLESIZE
-#define CMDTABLESIZE 31		/* should be prime */
-#undef  ARB
-#define ARB 1			/* actual size determined at run time */
-#undef  NEWARGS
-#define NEWARGS 5
-#undef  EOF_NLEFT
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-#undef  _PATH_DEVNULL
-#define _PATH_DEVNULL "/dev/null"
-#undef  PROFILE
-#define PROFILE 0
-#undef  SIGSSIZE
-#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
-#undef  MINSIZE
-#define MINSIZE 504		/* minimum size of a block */
-#undef  DEFINE_OPTIONS
-#define DEFINE_OPTIONS
-#undef  EOFMARKLEN
-#define EOFMARKLEN 79
-#undef  OPENBRACE
-#define OPENBRACE '{'
-#undef  CLOSEBRACE
-#define CLOSEBRACE '}'
-#undef  EMPTY
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#undef  signal
-#define signal bsd_signal
-#undef  sys_signame
-#define sys_signame sys_siglist
-#undef  S_DFL
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#undef  S_CATCH
-#define S_CATCH 2		/* signal is caught */
-#undef  S_IGN
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#undef  S_HARD_IGN
-#define S_HARD_IGN 4		/* signal is ignored permenantly */
-#undef  S_RESET
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-#undef  OUTBUFSIZ
-#define OUTBUFSIZ BUFSIZ
-#undef  BLOCK_OUT
-#define BLOCK_OUT -2		/* output to a fixed block of memory */
-#undef  MEM_OUT
-#define MEM_OUT -3		/* output to dynamically allocated memory */
-#undef  OUTPUT_ERR
-#define OUTPUT_ERR 01		/* error occurred on output */
-#undef  TEMPSIZE
-#define TEMPSIZE 24
-#undef  HAVE_VASPRINTF
-#define HAVE_VASPRINTF 1
-#undef  VTABSIZE
-#define VTABSIZE 39
-#undef  VTABSIZE
-#define VTABSIZE 517
-#undef  ATABSIZE
-#define ATABSIZE 39
-#undef  YYBISON
-#define YYBISON 1
-#undef  YYSKELETON_NAME
-#define YYSKELETON_NAME "yacc.c"
-#undef  YYPURE
-#define YYPURE 0
-#undef  YYLSP_NEEDED
-#define YYLSP_NEEDED 0
-#undef  ARITH_NUM
-#define ARITH_NUM 258
-#undef  ARITH_LPAREN
-#define ARITH_LPAREN 259
-#undef  ARITH_RPAREN
-#define ARITH_RPAREN 260
-#undef  ARITH_OR
-#define ARITH_OR 261
-#undef  ARITH_AND
-#define ARITH_AND 262
-#undef  ARITH_BOR
-#define ARITH_BOR 263
-#undef  ARITH_BXOR
-#define ARITH_BXOR 264
-#undef  ARITH_BAND
-#define ARITH_BAND 265
-#undef  ARITH_NE
-#define ARITH_NE 266
-#undef  ARITH_EQ
-#define ARITH_EQ 267
-#undef  ARITH_LE
-#define ARITH_LE 268
-#undef  ARITH_GE
-#define ARITH_GE 269
-#undef  ARITH_GT
-#define ARITH_GT 270
-#undef  ARITH_LT
-#define ARITH_LT 271
-#undef  ARITH_RSHIFT
-#define ARITH_RSHIFT 272
-#undef  ARITH_LSHIFT
-#define ARITH_LSHIFT 273
-#undef  ARITH_SUB
-#define ARITH_SUB 274
-#undef  ARITH_ADD
-#define ARITH_ADD 275
-#undef  ARITH_REM
-#define ARITH_REM 276
-#undef  ARITH_DIV
-#define ARITH_DIV 277
-#undef  ARITH_MUL
-#define ARITH_MUL 278
-#undef  ARITH_BNOT
-#define ARITH_BNOT 279
-#undef  ARITH_NOT
-#define ARITH_NOT 280
-#undef  ARITH_UNARYPLUS
-#define ARITH_UNARYPLUS 281
-#undef  ARITH_UNARYMINUS
-#define ARITH_UNARYMINUS 282
-#undef  YYFINAL
-#define YYFINAL  14
-#undef  YYLAST
-#define YYLAST   170
-#undef  YYNTOKENS
-#define YYNTOKENS  28
-#undef  YYNNTS
-#define YYNNTS  3
-#undef  YYNRULES
-#define YYNRULES  26
-#undef  YYNSTATES
-#define YYNSTATES  52
-#undef  YYUNDEFTOK
-#define YYUNDEFTOK  2
-#undef  YYMAXUTOK
-#define YYMAXUTOK   282
-#undef  YYPACT_NINF
-#define YYPACT_NINF -13
-#undef  YYTABLE_NINF
-#define YYTABLE_NINF -1
-#undef  yyerrok
-#define yyerrok		(yyerrstatus = 0)
-#undef  yyclearin
-#define yyclearin	(yychar = YYEMPTY)
-#undef  YYEMPTY
-#define YYEMPTY		(-2)
-#undef  YYEOF
-#define YYEOF		0
-#undef  YYACCEPT
-#define YYACCEPT	goto yyacceptlab
-#undef  YYABORT
-#define YYABORT		goto yyabortlab
-#undef  YYERROR
-#define YYERROR		goto yyerrorlab
-#undef  YYFAIL
-#define YYFAIL		goto yyerrlab
-#undef  YYTERROR
-#define YYTERROR	1
-#undef  YYERRCODE
-#define YYERRCODE	256
-#undef  YYPOPSTACK
-#define YYPOPSTACK   (yyvsp--, yyssp--)
-#undef  YY_INT_ALIGNED
-#define  YY_INT_ALIGNED short int
-#undef  FLEX_SCANNER
-#define FLEX_SCANNER
-#undef  YY_FLEX_MAJOR_VERSION
-#define YY_FLEX_MAJOR_VERSION 2
-#undef  YY_FLEX_MINOR_VERSION
-#define YY_FLEX_MINOR_VERSION 5
-#undef  YY_FLEX_SUBMINOR_VERSION
-#define YY_FLEX_SUBMINOR_VERSION 31
-#undef  FLEX_BETA
-#define FLEX_BETA
-#undef  FLEXINT_H
-#define FLEXINT_H
-#undef  INT8_MIN
-#define INT8_MIN               (-128)
-#undef  INT16_MIN
-#define INT16_MIN              (-32767-1)
-#undef  INT32_MIN
-#define INT32_MIN              (-2147483647-1)
-#undef  INT8_MAX
-#define INT8_MAX               (127)
-#undef  INT16_MAX
-#define INT16_MAX              (32767)
-#undef  INT32_MAX
-#define INT32_MAX              (2147483647)
-#undef  UINT8_MAX
-#define UINT8_MAX              (255U)
-#undef  UINT16_MAX
-#define UINT16_MAX             (65535U)
-#undef  UINT32_MAX
-#define UINT32_MAX             (4294967295U)
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  yyconst
-#define yyconst const
-#undef  yyconst
-#define yyconst
-#undef  YY_NULL
-#define YY_NULL 0
-#undef  BEGIN
-#define BEGIN (yy_start) = 1 + 2 *
-#undef  YY_START
-#define YY_START (((yy_start) - 1) / 2)
-#undef  YYSTATE
-#define YYSTATE YY_START
-#undef  YY_NEW_FILE
-#define YY_NEW_FILE yyrestart(yyin  )
-#undef  YY_END_OF_BUFFER_CHAR
-#define YY_END_OF_BUFFER_CHAR 0
-#undef  YY_BUF_SIZE
-#define YY_BUF_SIZE 16384
-#undef  YY_TYPEDEF_YY_BUFFER_STATE
-#define YY_TYPEDEF_YY_BUFFER_STATE
-#undef  EOB_ACT_CONTINUE_SCAN
-#define EOB_ACT_CONTINUE_SCAN 0
-#undef  EOB_ACT_END_OF_FILE
-#define EOB_ACT_END_OF_FILE 1
-#undef  EOB_ACT_LAST_MATCH
-#define EOB_ACT_LAST_MATCH 2
-#undef  YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-#undef  YY_STRUCT_YY_BUFFER_STATE
-#define YY_STRUCT_YY_BUFFER_STATE
-#undef  YY_BUFFER_NEW
-#define YY_BUFFER_NEW 0
-#undef  YY_BUFFER_NORMAL
-#define YY_BUFFER_NORMAL 1
-#undef  YY_BUFFER_EOF_PENDING
-#define YY_BUFFER_EOF_PENDING 2
-#undef  YY_CURRENT_BUFFER
-#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
-#undef  YY_CURRENT_BUFFER_LVALUE
-#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
-#undef  YY_FLUSH_BUFFER
-#define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER )
-#undef  yy_new_buffer
-#define yy_new_buffer yy_create_buffer
-#undef  YY_SKIP_YYWRAP
-#define YY_SKIP_YYWRAP
-#undef  yytext_ptr
-#define yytext_ptr yytext
-#undef  YY_DO_BEFORE_ACTION
-#define YY_DO_BEFORE_ACTION \
-#undef  YY_NUM_RULES
-#define YY_NUM_RULES 29
-#undef  YY_END_OF_BUFFER
-#define YY_END_OF_BUFFER 30
-#undef  REJECT
-#define REJECT reject_used_but_not_detected
-#undef  YY_MORE_ADJ
-#define YY_MORE_ADJ 0
-#undef  YY_RESTORE_YY_MORE_OFFSET
-#define YY_RESTORE_YY_MORE_OFFSET
-#undef  YY_NO_UNPUT
-#define YY_NO_UNPUT
-#undef  INITIAL
-#define INITIAL 0
-#undef  YY_EXTRA_TYPE
-#define YY_EXTRA_TYPE void *
-#undef  YY_READ_BUF_SIZE
-#define YY_READ_BUF_SIZE 8192
-#undef  ECHO
-#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
-#undef  YY_START_STACK_INCR
-#define YY_START_STACK_INCR 25
-#undef  YY_DECL_IS_OURS
-#define YY_DECL_IS_OURS 1
-#undef  YY_DECL
-#define YY_DECL int yylex (void)
-#undef  YY_USER_ACTION
-#define YY_USER_ACTION
-#undef  YY_BREAK
-#define YY_BREAK break;
-#undef  YY_RULE_SETUP
-#define YY_RULE_SETUP \
-#undef  YY_EXIT_FAILURE
-#define YY_EXIT_FAILURE 2
-#undef  YYTABLES_NAME
-#define YYTABLES_NAME "yytables"
-#undef  MAXPWD
-#define MAXPWD 256
-#undef  signal
-#define signal bsd_signal
-#undef  ALL
-#define ALL (E_OPEN|E_CREAT|E_EXEC)
-#undef  EV_EXIT
-#define EV_EXIT 01		/* exit after evaluating tree */
-#undef  EV_TESTED
-#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
-#undef  EV_BACKCMD
-#define EV_BACKCMD 04		/* command executing within back quotes */
-#undef  CMDTABLESIZE
-#define CMDTABLESIZE 31		/* should be prime */
-#undef  ARB
-#define ARB 1			/* actual size determined at run time */
-#undef  NEWARGS
-#define NEWARGS 5
-#undef  EOF_NLEFT
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-#undef  _PATH_DEVNULL
-#define _PATH_DEVNULL "/dev/null"
-#undef  PROFILE
-#define PROFILE 0
-#undef  SIGSSIZE
-#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
-#undef  MINSIZE
-#define MINSIZE 504		/* minimum size of a block */
-#undef  DEFINE_OPTIONS
-#define DEFINE_OPTIONS
-#undef  EOFMARKLEN
-#define EOFMARKLEN 79
-#undef  OPENBRACE
-#define OPENBRACE '{'
-#undef  CLOSEBRACE
-#define CLOSEBRACE '}'
-#undef  EMPTY
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#undef  signal
-#define signal bsd_signal
-#undef  sys_signame
-#define sys_signame sys_siglist
-#undef  S_DFL
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#undef  S_CATCH
-#define S_CATCH 2		/* signal is caught */
-#undef  S_IGN
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#undef  S_HARD_IGN
-#define S_HARD_IGN 4		/* signal is ignored permenantly */
-#undef  S_RESET
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-#undef  OUTBUFSIZ
-#define OUTBUFSIZ BUFSIZ
-#undef  BLOCK_OUT
-#define BLOCK_OUT -2		/* output to a fixed block of memory */
-#undef  MEM_OUT
-#define MEM_OUT -3		/* output to dynamically allocated memory */
-#undef  OUTPUT_ERR
-#define OUTPUT_ERR 01		/* error occurred on output */
-#undef  TEMPSIZE
-#define TEMPSIZE 24
-#undef  HAVE_VASPRINTF
-#define HAVE_VASPRINTF 1
-#undef  VTABSIZE
-#define VTABSIZE 39
-#undef  VTABSIZE
-#define VTABSIZE 517
-#undef  main
-#define main echocmd
-#undef  YYBISON
-#define YYBISON 1
-#undef  YYSKELETON_NAME
-#define YYSKELETON_NAME "yacc.c"
-#undef  YYPURE
-#define YYPURE 0
-#undef  YYLSP_NEEDED
-#define YYLSP_NEEDED 0
-#undef  ARITH_NUM
-#define ARITH_NUM 258
-#undef  ARITH_LPAREN
-#define ARITH_LPAREN 259
-#undef  ARITH_RPAREN
-#define ARITH_RPAREN 260
-#undef  ARITH_OR
-#define ARITH_OR 261
-#undef  ARITH_AND
-#define ARITH_AND 262
-#undef  ARITH_BOR
-#define ARITH_BOR 263
-#undef  ARITH_BXOR
-#define ARITH_BXOR 264
-#undef  ARITH_BAND
-#define ARITH_BAND 265
-#undef  ARITH_NE
-#define ARITH_NE 266
-#undef  ARITH_EQ
-#define ARITH_EQ 267
-#undef  ARITH_LE
-#define ARITH_LE 268
-#undef  ARITH_GE
-#define ARITH_GE 269
-#undef  ARITH_GT
-#define ARITH_GT 270
-#undef  ARITH_LT
-#define ARITH_LT 271
-#undef  ARITH_RSHIFT
-#define ARITH_RSHIFT 272
-#undef  ARITH_LSHIFT
-#define ARITH_LSHIFT 273
-#undef  ARITH_SUB
-#define ARITH_SUB 274
-#undef  ARITH_ADD
-#define ARITH_ADD 275
-#undef  ARITH_REM
-#define ARITH_REM 276
-#undef  ARITH_DIV
-#define ARITH_DIV 277
-#undef  ARITH_MUL
-#define ARITH_MUL 278
-#undef  ARITH_BNOT
-#define ARITH_BNOT 279
-#undef  ARITH_NOT
-#define ARITH_NOT 280
-#undef  ARITH_UNARYPLUS
-#define ARITH_UNARYPLUS 281
-#undef  ARITH_UNARYMINUS
-#define ARITH_UNARYMINUS 282
-#undef  YYFINAL
-#define YYFINAL  14
-#undef  YYLAST
-#define YYLAST   170
-#undef  YYNTOKENS
-#define YYNTOKENS  28
-#undef  YYNNTS
-#define YYNNTS  3
-#undef  YYNRULES
-#define YYNRULES  26
-#undef  YYNSTATES
-#define YYNSTATES  52
-#undef  YYUNDEFTOK
-#define YYUNDEFTOK  2
-#undef  YYMAXUTOK
-#define YYMAXUTOK   282
-#undef  YYPACT_NINF
-#define YYPACT_NINF -13
-#undef  YYTABLE_NINF
-#define YYTABLE_NINF -1
-#undef  yyerrok
-#define yyerrok		(yyerrstatus = 0)
-#undef  yyclearin
-#define yyclearin	(yychar = YYEMPTY)
-#undef  YYEMPTY
-#define YYEMPTY		(-2)
-#undef  YYEOF
-#define YYEOF		0
-#undef  YYACCEPT
-#define YYACCEPT	goto yyacceptlab
-#undef  YYABORT
-#define YYABORT		goto yyabortlab
-#undef  YYERROR
-#define YYERROR		goto yyerrorlab
-#undef  YYFAIL
-#define YYFAIL		goto yyerrlab
-#undef  YYTERROR
-#define YYTERROR	1
-#undef  YYERRCODE
-#define YYERRCODE	256
-#undef  YYPOPSTACK
-#define YYPOPSTACK   (yyvsp--, yyssp--)
-#undef  YY_INT_ALIGNED
-#define  YY_INT_ALIGNED short int
-#undef  FLEX_SCANNER
-#define FLEX_SCANNER
-#undef  YY_FLEX_MAJOR_VERSION
-#define YY_FLEX_MAJOR_VERSION 2
-#undef  YY_FLEX_MINOR_VERSION
-#define YY_FLEX_MINOR_VERSION 5
-#undef  YY_FLEX_SUBMINOR_VERSION
-#define YY_FLEX_SUBMINOR_VERSION 31
-#undef  FLEX_BETA
-#define FLEX_BETA
-#undef  FLEXINT_H
-#define FLEXINT_H
-#undef  INT8_MIN
-#define INT8_MIN               (-128)
-#undef  INT16_MIN
-#define INT16_MIN              (-32767-1)
-#undef  INT32_MIN
-#define INT32_MIN              (-2147483647-1)
-#undef  INT8_MAX
-#define INT8_MAX               (127)
-#undef  INT16_MAX
-#define INT16_MAX              (32767)
-#undef  INT32_MAX
-#define INT32_MAX              (2147483647)
-#undef  UINT8_MAX
-#define UINT8_MAX              (255U)
-#undef  UINT16_MAX
-#define UINT16_MAX             (65535U)
-#undef  UINT32_MAX
-#define UINT32_MAX             (4294967295U)
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  YY_USE_CONST
-#define YY_USE_CONST
-#undef  yyconst
-#define yyconst const
-#undef  yyconst
-#define yyconst
-#undef  YY_NULL
-#define YY_NULL 0
-#undef  BEGIN
-#define BEGIN (yy_start) = 1 + 2 *
-#undef  YY_START
-#define YY_START (((yy_start) - 1) / 2)
-#undef  YYSTATE
-#define YYSTATE YY_START
-#undef  YY_NEW_FILE
-#define YY_NEW_FILE yyrestart(yyin  )
-#undef  YY_END_OF_BUFFER_CHAR
-#define YY_END_OF_BUFFER_CHAR 0
-#undef  YY_BUF_SIZE
-#define YY_BUF_SIZE 16384
-#undef  YY_TYPEDEF_YY_BUFFER_STATE
-#define YY_TYPEDEF_YY_BUFFER_STATE
-#undef  EOB_ACT_CONTINUE_SCAN
-#define EOB_ACT_CONTINUE_SCAN 0
-#undef  EOB_ACT_END_OF_FILE
-#define EOB_ACT_END_OF_FILE 1
-#undef  EOB_ACT_LAST_MATCH
-#define EOB_ACT_LAST_MATCH 2
-#undef  YY_TYPEDEF_YY_SIZE_T
-#define YY_TYPEDEF_YY_SIZE_T
-#undef  YY_STRUCT_YY_BUFFER_STATE
-#define YY_STRUCT_YY_BUFFER_STATE
-#undef  YY_BUFFER_NEW
-#define YY_BUFFER_NEW 0
-#undef  YY_BUFFER_NORMAL
-#define YY_BUFFER_NORMAL 1
-#undef  YY_BUFFER_EOF_PENDING
-#define YY_BUFFER_EOF_PENDING 2
-#undef  YY_CURRENT_BUFFER
-#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
-#undef  YY_CURRENT_BUFFER_LVALUE
-#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]
-#undef  YY_FLUSH_BUFFER
-#define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER )
-#undef  yy_new_buffer
-#define yy_new_buffer yy_create_buffer
-#undef  yytext_ptr
-#define yytext_ptr yytext
-#undef  YY_DO_BEFORE_ACTION
-#define YY_DO_BEFORE_ACTION \
-#undef  YY_NUM_RULES
-#define YY_NUM_RULES 29
-#undef  YY_END_OF_BUFFER
-#define YY_END_OF_BUFFER 30
-#undef  REJECT
-#define REJECT reject_used_but_not_detected
-#undef  YY_MORE_ADJ
-#define YY_MORE_ADJ 0
-#undef  YY_RESTORE_YY_MORE_OFFSET
-#define YY_RESTORE_YY_MORE_OFFSET
-#undef  YY_NO_UNPUT
-#define YY_NO_UNPUT
-#undef  INITIAL
-#define INITIAL 0
-#undef  YY_EXTRA_TYPE
-#define YY_EXTRA_TYPE void *
-#undef  YY_READ_BUF_SIZE
-#define YY_READ_BUF_SIZE 8192
-#undef  ECHO
-#define ECHO (void) fwrite( yytext, yyleng, 1, yyout )
-#undef  YY_START_STACK_INCR
-#define YY_START_STACK_INCR 25
-#undef  YY_DECL_IS_OURS
-#define YY_DECL_IS_OURS 1
-#undef  YY_DECL
-#define YY_DECL int yylex (void)
-#undef  YY_USER_ACTION
-#define YY_USER_ACTION
-#undef  YY_BREAK
-#define YY_BREAK break;
-#undef  YY_RULE_SETUP
-#define YY_RULE_SETUP \
-#undef  YY_EXIT_FAILURE
-#define YY_EXIT_FAILURE 2
-#undef  YYTABLES_NAME
-#define YYTABLES_NAME "yytables"
-#undef  MAXPWD
-#define MAXPWD 256
-#undef  ALL
-#define ALL (E_OPEN|E_CREAT|E_EXEC)
-#undef  EV_EXIT
-#define EV_EXIT 01		/* exit after evaluating tree */
-#undef  EV_TESTED
-#define EV_TESTED 02		/* exit status is checked; ignore -e flag */
-#undef  EV_BACKCMD
-#define EV_BACKCMD 04		/* command executing within back quotes */
-#undef  CMDTABLESIZE
-#define CMDTABLESIZE 31		/* should be prime */
-#undef  ARB
-#define ARB 1			/* actual size determined at run time */
-#undef  NEWARGS
-#define NEWARGS 5
-#undef  EOF_NLEFT
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-#undef  _PATH_DEVNULL
-#define _PATH_DEVNULL "/dev/null"
-#undef  PROFILE
-#define PROFILE 0
-#undef  SIGSSIZE
-#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
-#undef  MINSIZE
-#define MINSIZE 504		/* minimum size of a block */
-#undef  DEFINE_OPTIONS
-#define DEFINE_OPTIONS
-#undef  EOFMARKLEN
-#define EOFMARKLEN 79
-#undef  OPENBRACE
-#define OPENBRACE '{'
-#undef  CLOSEBRACE
-#define CLOSEBRACE '}'
-#undef  EMPTY
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#undef  S_DFL
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#undef  S_CATCH
-#define S_CATCH 2		/* signal is caught */
-#undef  S_IGN
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#undef  S_HARD_IGN
-#define S_HARD_IGN 4		/* signal is ignored permenantly */
-#undef  S_RESET
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-#undef  OUTBUFSIZ
-#define OUTBUFSIZ BUFSIZ
-#undef  BLOCK_OUT
-#define BLOCK_OUT -2		/* output to a fixed block of memory */
-#undef  MEM_OUT
-#define MEM_OUT -3		/* output to dynamically allocated memory */
-#undef  OUTPUT_ERR
-#define OUTPUT_ERR 01		/* error occurred on output */
-#undef  TEMPSIZE
-#define TEMPSIZE 24
-#undef  HAVE_VASPRINTF
-#define HAVE_VASPRINTF 1
-#undef  VTABSIZE
-#define VTABSIZE 39
-#undef  VTABSIZE
-#define VTABSIZE 517
-#undef  main
-#define main echocmd
-
-
-
-extern void rmaliases(void);
-
-extern int loopnest;		/* current loop nesting level */
-
-extern void deletefuncs(void);
-extern void hash_special_builtins(void);
-
-struct strpush {
-	struct strpush *prev;	/* preceding string on stack */
-	char *prevstring;
-	int prevnleft;
-	int prevlleft;
-	struct alias *ap;	/* if push was associated with an alias */
-};
-
-struct parsefile {
-	struct parsefile *prev;	/* preceding file on stack */
-	int linno;		/* current line */
-	int fd;			/* file descriptor (or -1 if string) */
-	int nleft;		/* number of chars left in this line */
-	int lleft;		/* number of chars left in this buffer */
-	char *nextc;		/* next char in buffer */
-	char *buf;		/* input buffer */
-	struct strpush *strpush; /* for pushing strings at this level */
-	struct strpush basestrpush; /* so pushing one is fast */
-};
-
-extern int parselleft;		/* copy of parsefile->lleft */
-extern struct parsefile basepf;	/* top level input file */
-extern char basebuf[BUFSIZ];	/* buffer for top level input file */
-
-extern pid_t backgndpid;	/* pid of last background process */
-extern int jobctl;
-
-extern int tokpushback;		/* last token pushed back */
-extern int checkkwd;            /* 1 == check for kwds, 2 == also eat newlines */
-
-struct redirtab {
-	struct redirtab *next;
-	short renamed[10];
-};
-
-extern struct redirtab *redirlist;
-
-extern char sigmode[NSIG];	/* current value of signal */
-
-extern char **environ;
-
-
-
-/*
- * Initialization code.
- */
-
-void
-init() {
-
-      /* from exec.c: */
-      {
-	      hash_special_builtins();
-      }
-
-      /* from input.c: */
-      {
-	      basepf.nextc = basepf.buf = basebuf;
-      }
-
-      /* from var.c: */
-      {
-	      char **envp;
-
-	      initvar();
-	      for (envp = environ ; *envp ; envp++) {
-		      if (strchr(*envp, '=')) {
-			      setvareq(*envp, VEXPORT|VTEXTFIXED);
-		      }
-	      }
-      }
-}
-
-
-
-/*
- * This routine is called when an error or an interrupt occurs in an
- * interactive shell and control is returned to the main command loop.
- */
-
-void
-reset() {
-
-      /* from eval.c: */
-      {
-	      evalskip = 0;
-	      loopnest = 0;
-	      funcnest = 0;
-      }
-
-      /* from input.c: */
-      {
-	      if (exception != EXSHELLPROC)
-		      parselleft = parsenleft = 0;	/* clear input buffer */
-	      popallfiles();
-      }
-
-      /* from parser.c: */
-      {
-	      tokpushback = 0;
-	      checkkwd = 0;
-      }
-
-      /* from redir.c: */
-      {
-	      while (redirlist)
-		      popredir();
-      }
-
-      /* from output.c: */
-      {
-	      out1 = &output;
-	      out2 = &errout;
-	      if (memout.buf != NULL) {
-		      ckfree(memout.buf);
-		      memout.buf = NULL;
-	      }
-      }
-}
-
-
-
-/*
- * This routine is called to initialize the shell to run a shell procedure.
- */
-
-void
-initshellproc() {
-
-      /* from alias.c: */
-      {
-	      rmaliases();
-      }
-
-      /* from eval.c: */
-      {
-	      exitstatus = 0;
-      }
-
-      /* from exec.c: */
-      {
-	      deletefuncs();
-      }
-
-      /* from input.c: */
-      {
-	      popallfiles();
-      }
-
-      /* from jobs.c: */
-      {
-	      backgndpid = -1;
-#if JOBS
-	      jobctl = 0;
-#endif
-      }
-
-      /* from options.c: */
-      {
-	      int i;
-
-	      for (i = 0; optlist[i].name; i++)
-		      optlist[i].val = 0;
-	      optschanged();
-
-      }
-
-      /* from redir.c: */
-      {
-	      clearredir(0);
-      }
-
-      /* from trap.c: */
-      {
-	      char *sm;
-
-	      clear_traps(0);
-	      for (sm = sigmode ; sm < sigmode + NSIG ; sm++) {
-		      if (*sm == S_IGN)
-			      *sm = S_HARD_IGN;
-	      }
-      }
-
-      /* from var.c: */
-      {
-	      shprocvar();
-      }
-}
diff --git a/sh/init.h b/sh/init.h
deleted file mode 100644
index 60d924e..0000000
--- a/sh/init.h
+++ /dev/null
@@ -1,39 +0,0 @@
-/*	$NetBSD: init.h,v 1.10 2003/08/07 09:05:32 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)init.h	8.2 (Berkeley) 5/4/95
- */
-
-void init(void);
-void reset(void);
-void initshellproc(void);
diff --git a/sh/input.c b/sh/input.c
deleted file mode 100644
index 056ee8b..0000000
--- a/sh/input.c
+++ /dev/null
@@ -1,577 +0,0 @@
-/*	$NetBSD: input.c,v 1.39 2003/08/07 09:05:32 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)input.c	8.3 (Berkeley) 6/9/95";
-#else
-__RCSID("$NetBSD: input.c,v 1.39 2003/08/07 09:05:32 agc Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdio.h>	/* defines BUFSIZ */
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
-
-/*
- * This file implements the input routines used by the parser.
- */
-
-#include "shell.h"
-#include "redir.h"
-#include "syntax.h"
-#include "input.h"
-#include "output.h"
-#include "options.h"
-#include "memalloc.h"
-#include "error.h"
-#include "alias.h"
-#include "parser.h"
-#include "myhistedit.h"
-
-#ifdef WITH_LINENOISE
-#include "linenoise.h"
-#endif
-
-#define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */
-
-MKINIT
-struct strpush {
-	struct strpush *prev;	/* preceding string on stack */
-	char *prevstring;
-	int prevnleft;
-	int prevlleft;
-	struct alias *ap;	/* if push was associated with an alias */
-};
-
-/*
- * The parsefile structure pointed to by the global variable parsefile
- * contains information about the current file being read.
- */
-
-MKINIT
-struct parsefile {
-	struct parsefile *prev;	/* preceding file on stack */
-	int linno;		/* current line */
-	int fd;			/* file descriptor (or -1 if string) */
-	int nleft;		/* number of chars left in this line */
-	int lleft;		/* number of chars left in this buffer */
-	char *nextc;		/* next char in buffer */
-	char *buf;		/* input buffer */
-	struct strpush *strpush; /* for pushing strings at this level */
-	struct strpush basestrpush; /* so pushing one is fast */
-};
-
-
-int plinno = 1;			/* input line number */
-int parsenleft;			/* copy of parsefile->nleft */
-MKINIT int parselleft;		/* copy of parsefile->lleft */
-char *parsenextc;		/* copy of parsefile->nextc */
-MKINIT struct parsefile basepf;	/* top level input file */
-MKINIT char basebuf[BUFSIZ];	/* buffer for top level input file */
-struct parsefile *parsefile = &basepf;	/* current input file */
-int init_editline = 0;		/* editline library initialized? */
-int whichprompt;		/* 1 == PS1, 2 == PS2 */
-
-#if WITH_HISTORY
-EditLine *el;			/* cookie for editline package */
-#endif
-
-STATIC void pushfile(void);
-static int preadfd(void);
-
-#ifdef mkinit
-INCLUDE <stdio.h>
-INCLUDE "input.h"
-INCLUDE "error.h"
-
-INIT {
-	basepf.nextc = basepf.buf = basebuf;
-}
-
-RESET {
-	if (exception != EXSHELLPROC)
-		parselleft = parsenleft = 0;	/* clear input buffer */
-	popallfiles();
-}
-
-SHELLPROC {
-	popallfiles();
-}
-#endif
-
-
-/*
- * Read a line from the script.
- */
-
-char *
-pfgets(char *line, int len)
-{
-	char *p = line;
-	int nleft = len;
-	int c;
-
-	while (--nleft > 0) {
-		c = pgetc_macro();
-		if (c == PEOF) {
-			if (p == line)
-				return NULL;
-			break;
-		}
-		*p++ = c;
-		if (c == '\n')
-			break;
-	}
-	*p = '\0';
-	return line;
-}
-
-
-
-/*
- * Read a character from the script, returning PEOF on end of file.
- * Nul characters in the input are silently discarded.
- */
-
-int
-pgetc(void)
-{
-	return pgetc_macro();
-}
-
-int in_interactive_mode() {
-    return parsefile != NULL && parsefile->fd == 0;
-}
-
-static int
-preadfd(void)
-{
-	int nr;
-	char *buf =  parsefile->buf;
-	parsenextc = buf;
-
-retry:
-#ifdef WITH_HISTORY
-	if (parsefile->fd == 0 && el) {
-		static const char *rl_cp;
-		static int el_len;
-
-		if (rl_cp == NULL)
-			rl_cp = el_gets(el, &el_len);
-		if (rl_cp == NULL)
-			nr = 0;
-		else {
-			nr = el_len;
-			if (nr > BUFSIZ - 8)
-				nr = BUFSIZ - 8;
-			memcpy(buf, rl_cp, nr);
-			if (nr != el_len) {
-				el_len -= nr;
-				rl_cp += nr;
-			} else
-				rl_cp = 0;
-		}
-
-	} else
-#endif
-#ifdef WITH_LINENOISE
-    if (parsefile->fd == 0) {
-        static char *rl_start;
-        static const char *rl_cp;
-        static int el_len;
-
-        if (rl_cp == NULL) {
-            rl_cp = rl_start = linenoise(getprompt(""));
-            if (rl_cp != NULL) {
-                el_len = strlen(rl_start);
-                if (el_len != 0) {
-                    /* Add non-blank lines to history. */
-                    linenoiseHistoryAdd(rl_start);
-                }
-                out2str("\n");
-                /* Client expects a newline at end of input, doesn't expect null */
-                rl_start[el_len++] = '\n';
-            }
-        }
-        if (rl_cp == NULL)
-            nr = 0;
-        else {
-            nr = el_len;
-            if (nr > BUFSIZ - 8)
-                nr = BUFSIZ - 8;
-            memcpy(buf, rl_cp, nr);
-            if (nr != el_len) {
-                el_len -= nr;
-                rl_cp += nr;
-            } else {
-                rl_cp = 0;
-                if (rl_start != NULL) {
-                    free(rl_start);
-                    rl_start = NULL;
-                }
-            }
-        }
-    } else
-#endif
-		nr = read(parsefile->fd, buf, BUFSIZ - 8);
-
-
-	if (nr <= 0) {
-                if (nr < 0) {
-                        if (errno == EINTR)
-                                goto retry;
-                        if (parsefile->fd == 0 && errno == EWOULDBLOCK) {
-                                int flags = fcntl(0, F_GETFL, 0);
-                                if (flags >= 0 && flags & O_NONBLOCK) {
-                                        flags &=~ O_NONBLOCK;
-                                        if (fcntl(0, F_SETFL, flags) >= 0) {
-						out2str("sh: turning off NDELAY mode\n");
-                                                goto retry;
-                                        }
-                                }
-                        }
-                }
-                nr = -1;
-	}
-	return nr;
-}
-
-/*
- * Refill the input buffer and return the next input character:
- *
- * 1) If a string was pushed back on the input, pop it;
- * 2) If an EOF was pushed back (parsenleft == EOF_NLEFT) or we are reading
- *    from a string so we can't refill the buffer, return EOF.
- * 3) If the is more stuff in this buffer, use it else call read to fill it.
- * 4) Process input up to the next newline, deleting nul characters.
- */
-
-int
-preadbuffer(void)
-{
-	char *p, *q;
-	int more;
-	int something;
-	char savec;
-
-	if (parsefile->strpush) {
-		popstring();
-		if (--parsenleft >= 0)
-			return (*parsenextc++);
-	}
-	if (parsenleft == EOF_NLEFT || parsefile->buf == NULL)
-		return PEOF;
-	flushout(&output);
-	flushout(&errout);
-
-again:
-	if (parselleft <= 0) {
-		if ((parselleft = preadfd()) == -1) {
-			parselleft = parsenleft = EOF_NLEFT;
-			return PEOF;
-		}
-	}
-
-	q = p = parsenextc;
-
-	/* delete nul characters */
-	something = 0;
-	for (more = 1; more;) {
-		switch (*p) {
-		case '\0':
-			p++;	/* Skip nul */
-			goto check;
-
-		case '\t':
-		case ' ':
-			break;
-
-		case '\n':
-			parsenleft = q - parsenextc;
-			more = 0; /* Stop processing here */
-			break;
-
-		default:
-			something = 1;
-			break;
-		}
-
-		*q++ = *p++;
-check:
-		if (--parselleft <= 0) {
-			parsenleft = q - parsenextc - 1;
-			if (parsenleft < 0)
-				goto again;
-			*q = '\0';
-			more = 0;
-		}
-	}
-
-	savec = *q;
-	*q = '\0';
-
-#ifdef WITH_HISTORY
-	if (parsefile->fd == 0 && hist && something) {
-		HistEvent he;
-		INTOFF;
-		history(hist, &he, whichprompt == 1? H_ENTER : H_APPEND,
-		    parsenextc);
-		INTON;
-	}
-#endif
-
-	if (vflag) {
-		out2str(parsenextc);
-		flushout(out2);
-	}
-
-	*q = savec;
-
-	return *parsenextc++;
-}
-
-/*
- * Undo the last call to pgetc.  Only one character may be pushed back.
- * PEOF may be pushed back.
- */
-
-void
-pungetc(void)
-{
-	parsenleft++;
-	parsenextc--;
-}
-
-/*
- * Push a string back onto the input at this current parsefile level.
- * We handle aliases this way.
- */
-void
-pushstring(char *s, int len, void *ap)
-{
-	struct strpush *sp;
-
-	INTOFF;
-/*dprintf("*** calling pushstring: %s, %d\n", s, len);*/
-	if (parsefile->strpush) {
-		sp = ckmalloc(sizeof (struct strpush));
-		sp->prev = parsefile->strpush;
-		parsefile->strpush = sp;
-	} else
-		sp = parsefile->strpush = &(parsefile->basestrpush);
-	sp->prevstring = parsenextc;
-	sp->prevnleft = parsenleft;
-	sp->prevlleft = parselleft;
-	sp->ap = (struct alias *)ap;
-	if (ap)
-		((struct alias *)ap)->flag |= ALIASINUSE;
-	parsenextc = s;
-	parsenleft = len;
-	INTON;
-}
-
-void
-popstring(void)
-{
-	struct strpush *sp = parsefile->strpush;
-
-	INTOFF;
-	parsenextc = sp->prevstring;
-	parsenleft = sp->prevnleft;
-	parselleft = sp->prevlleft;
-/*dprintf("*** calling popstring: restoring to '%s'\n", parsenextc);*/
-	if (sp->ap)
-		sp->ap->flag &= ~ALIASINUSE;
-	parsefile->strpush = sp->prev;
-	if (sp != &(parsefile->basestrpush))
-		ckfree(sp);
-	INTON;
-}
-
-/*
- * Set the input to take input from a file.  If push is set, push the
- * old input onto the stack first.
- */
-
-void
-setinputfile(const char *fname, int push)
-{
-	int fd;
-	int fd2;
-
-	INTOFF;
-	if ((fd = open(fname, O_RDONLY)) < 0)
-		error("Can't open %s", fname);
-	if (fd < 10) {
-		fd2 = copyfd(fd, 10);
-		close(fd);
-		if (fd2 < 0)
-			error("Out of file descriptors");
-		fd = fd2;
-	}
-	setinputfd(fd, push);
-	INTON;
-}
-
-
-/*
- * Like setinputfile, but takes an open file descriptor.  Call this with
- * interrupts off.
- */
-
-void
-setinputfd(int fd, int push)
-{
-	(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
-	if (push) {
-		pushfile();
-		parsefile->buf = ckmalloc(BUFSIZ);
-	}
-	if (parsefile->fd > 0)
-		close(parsefile->fd);
-	parsefile->fd = fd;
-	if (parsefile->buf == NULL)
-		parsefile->buf = ckmalloc(BUFSIZ);
-	parselleft = parsenleft = 0;
-	plinno = 1;
-}
-
-
-/*
- * Like setinputfile, but takes input from a string.
- */
-
-void
-setinputstring(char *string, int push)
-{
-	INTOFF;
-	if (push)
-		pushfile();
-	parsenextc = string;
-	parselleft = parsenleft = strlen(string);
-	parsefile->buf = NULL;
-	plinno = 1;
-	INTON;
-}
-
-
-
-/*
- * To handle the "." command, a stack of input files is used.  Pushfile
- * adds a new entry to the stack and popfile restores the previous level.
- */
-
-STATIC void
-pushfile(void)
-{
-	struct parsefile *pf;
-
-	parsefile->nleft = parsenleft;
-	parsefile->lleft = parselleft;
-	parsefile->nextc = parsenextc;
-	parsefile->linno = plinno;
-	pf = (struct parsefile *)ckmalloc(sizeof (struct parsefile));
-	pf->prev = parsefile;
-	pf->fd = -1;
-	pf->strpush = NULL;
-	pf->basestrpush.prev = NULL;
-	parsefile = pf;
-}
-
-
-void
-popfile(void)
-{
-	struct parsefile *pf = parsefile;
-
-	INTOFF;
-	if (pf->fd >= 0)
-		close(pf->fd);
-	if (pf->buf)
-		ckfree(pf->buf);
-	while (pf->strpush)
-		popstring();
-	parsefile = pf->prev;
-	ckfree(pf);
-	parsenleft = parsefile->nleft;
-	parselleft = parsefile->lleft;
-	parsenextc = parsefile->nextc;
-	plinno = parsefile->linno;
-	INTON;
-}
-
-
-/*
- * Return to top level.
- */
-
-void
-popallfiles(void)
-{
-	while (parsefile != &basepf)
-		popfile();
-}
-
-
-
-/*
- * Close the file(s) that the shell is reading commands from.  Called
- * after a fork is done.
- *
- * Takes one arg, vfork, which tells it to not modify its global vars
- * as it is still running in the parent.
- *
- * This code is (probably) unnecessary as the 'close on exec' flag is
- * set and should be enough.  In the vfork case it is definitely wrong
- * to close the fds as another fork() may be done later to feed data
- * from a 'here' document into a pipe and we don't want to close the
- * pipe!
- */
-
-void
-closescript(int vforked)
-{
-	if (vforked)
-		return;
-	popallfiles();
-	if (parsefile->fd > 0) {
-		close(parsefile->fd);
-		parsefile->fd = 0;
-	}
-}
diff --git a/sh/input.h b/sh/input.h
deleted file mode 100644
index 99c1b77..0000000
--- a/sh/input.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*	$NetBSD: input.h,v 1.15 2003/08/07 09:05:33 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)input.h	8.2 (Berkeley) 5/4/95
- */
-
-/* PEOF (the end of file marker) is defined in syntax.h */
-
-/*
- * The input line number.  Input.c just defines this variable, and saves
- * and restores it when files are pushed and popped.  The user of this
- * package must set its value.
- */
-extern int plinno;
-extern int parsenleft;		/* number of characters left in input buffer */
-extern char *parsenextc;	/* next character in input buffer */
-extern int init_editline;	/* 0 == not setup, 1 == OK, -1 == failed */
-
-int in_interactive_mode();
-char *pfgets(char *, int);
-int pgetc(void);
-int preadbuffer(void);
-void pungetc(void);
-void pushstring(char *, int, void *);
-void popstring(void);
-void setinputfile(const char *, int);
-void setinputfd(int, int);
-void setinputstring(char *, int);
-void popfile(void);
-void popallfiles(void);
-void closescript(int);
-
-#define pgetc_macro()	(--parsenleft >= 0? *parsenextc++ : preadbuffer())
diff --git a/sh/jobs.c b/sh/jobs.c
deleted file mode 100644
index b9460b0..0000000
--- a/sh/jobs.c
+++ /dev/null
@@ -1,1487 +0,0 @@
-/*	$NetBSD: jobs.c,v 1.62 2003/12/18 00:56:05 christos Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)jobs.c	8.5 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: jobs.c,v 1.62 2003/12/18 00:56:05 christos Exp $");
-#endif
-#endif /* not lint */
-
-#include <fcntl.h>
-#include <signal.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-#define _PATH_DEVNULL "/dev/null"
-#include <sys/types.h>
-#include <sys/param.h>
-#ifdef BSD
-#include <sys/wait.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#endif
-#include <sys/wait.h>
-#define killpg(s,i) kill(-(s),i)
-#include <sys/ioctl.h>
-
-#include "shell.h"
-#if JOBS
-#if OLD_TTY_DRIVER
-#include "sgtty.h"
-#else
-#include <termios.h>
-#endif
-#undef CEOF			/* syntax.h redefines this */
-#endif
-#include "redir.h"
-#include "show.h"
-#include "main.h"
-#include "parser.h"
-#include "nodes.h"
-#include "jobs.h"
-#include "options.h"
-#include "trap.h"
-#include "syntax.h"
-#include "input.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-
-// Use of process groups is disabled to allow adb shell children to terminate when the shell dies
-#define USE_PROCESS_GROUPS
-
-
-static struct job *jobtab;		/* array of jobs */
-static int njobs;			/* size of array */
-static int jobs_invalid;		/* set in child */
-MKINIT pid_t backgndpid = -1;	/* pid of last background process */
-#if JOBS
-int initialpgrp;		/* pgrp of shell on invocation */
-static int curjob = -1;		/* current job */
-#endif
-static int ttyfd = -1;
-
-STATIC void restartjob(struct job *);
-STATIC void freejob(struct job *);
-STATIC struct job *getjob(const char *, int);
-STATIC int dowait(int, struct job *);
-STATIC int onsigchild(void);
-STATIC int waitproc(int, struct job *, int *);
-STATIC void cmdtxt(union node *);
-STATIC void cmdlist(union node *, int);
-STATIC void cmdputs(const char *);
-
-#ifdef OLD_TTY_DRIVER
-static pid_t tcgetpgrp(int fd);
-static int tcsetpgrp(int fd, pid_t pgrp);
-
-static pid_t
-tcgetpgrp(int fd)
-{
-	pid_t pgrp;
-	if (ioctl(fd, TIOCGPGRP, (char *)&pgrp) == -1)
-		return -1;
-	else
-		return pgrp;
-}
-
-static int
-tcsetpgrp(int fd, pid_tpgrp)
-{
-	return ioctl(fd, TIOCSPGRP, (char *)&pgrp);
-}
-#endif
-
-/*
- * Turn job control on and off.
- *
- * Note:  This code assumes that the third arg to ioctl is a character
- * pointer, which is true on Berkeley systems but not System V.  Since
- * System V doesn't have job control yet, this isn't a problem now.
- */
-
-MKINIT int jobctl;
-
-void
-setjobctl(int on)
-{
-#ifdef OLD_TTY_DRIVER
-	int ldisc;
-#endif
-
-	if (on == jobctl || rootshell == 0)
-		return;
-	if (on) {
-#if defined(FIOCLEX) || defined(FD_CLOEXEC)
-		int err;
-		int i;
-		if (ttyfd != -1)
-			close(ttyfd);
-		if ((ttyfd = open("/dev/tty", O_RDWR)) == -1) {
-			for (i = 0; i < 3; i++) {
-				if (isatty(i) && (ttyfd = dup(i)) != -1)
-					break;
-			}
-			if (i == 3)
-				goto out;
-		}
-		/* Move to a high fd */
-		for (i = 10; i > 2; i--) {
-			if ((err = fcntl(ttyfd, F_DUPFD, (1 << i) - 1)) != -1)
-				break;
-		}
-		if (err != -1) {
-			close(ttyfd);
-			ttyfd = err;
-		}
-#ifdef FIOCLEX
-		err = ioctl(ttyfd, FIOCLEX, 0);
-#elif FD_CLOEXEC
-		err = fcntl(ttyfd, F_SETFD,
-		    fcntl(ttyfd, F_GETFD, 0) | FD_CLOEXEC);
-#endif
-		if (err == -1) {
-			close(ttyfd);
-			ttyfd = -1;
-			goto out;
-		}
-#else
-		out2str("sh: Need FIOCLEX or FD_CLOEXEC to support job control");
-		goto out;
-#endif
-		do { /* while we are in the background */
-			if ((initialpgrp = tcgetpgrp(ttyfd)) < 0) {
-out:
-				out2str("sh: can't access tty; job control turned off\n");
-				mflag = 0;
-				return;
-			}
-			if (initialpgrp == -1)
-				initialpgrp = getpgrp();
-			else if (initialpgrp != getpgrp()) {
-				killpg(0, SIGTTIN);
-				continue;
-			}
-		} while (0);
-
-#ifdef OLD_TTY_DRIVER
-		if (ioctl(ttyfd, TIOCGETD, (char *)&ldisc) < 0
-		    || ldisc != NTTYDISC) {
-			out2str("sh: need new tty driver to run job control; job control turned off\n");
-			mflag = 0;
-			return;
-		}
-#endif
-		setsignal(SIGTSTP, 0);
-		setsignal(SIGTTOU, 0);
-		setsignal(SIGTTIN, 0);
-#ifdef USE_PROCESS_GROUPS
-		if (getpgid(0) != rootpid && setpgid(0, rootpid) == -1)
-			error("Cannot set process group (%s) at %d",
-			    strerror(errno), __LINE__);
-		if (tcsetpgrp(ttyfd, rootpid) == -1)
-			error("Cannot set tty process group (%s) at %d",
-			    strerror(errno), __LINE__);
-#endif
-	} else { /* turning job control off */
-#ifdef USE_PROCESS_GROUPS
-		if (getpgid(0) != initialpgrp && setpgid(0, initialpgrp) == -1)
-			error("Cannot set process group (%s) at %d",
-			    strerror(errno), __LINE__);
-		if (tcsetpgrp(ttyfd, initialpgrp) == -1)
-			error("Cannot set tty process group (%s) at %d",
-			    strerror(errno), __LINE__);
-#endif
-		close(ttyfd);
-		ttyfd = -1;
-		setsignal(SIGTSTP, 0);
-		setsignal(SIGTTOU, 0);
-		setsignal(SIGTTIN, 0);
-	}
-	jobctl = on;
-}
-
-
-#ifdef mkinit
-INCLUDE <stdlib.h>
-
-SHELLPROC {
-	backgndpid = -1;
-#if JOBS
-	jobctl = 0;
-#endif
-}
-
-#endif
-
-
-
-#if JOBS
-int
-fgcmd(int argc, char **argv)
-{
-	struct job *jp;
-	int i;
-	int status;
-
-	nextopt("");
-	jp = getjob(*argptr, 0);
-	if (jp->jobctl == 0)
-		error("job not created under job control");
-	out1fmt("%s", jp->ps[0].cmd);
-	for (i = 1; i < jp->nprocs; i++)
-		out1fmt(" | %s", jp->ps[i].cmd );
-	out1c('\n');
-	flushall();
-
-	for (i = 0; i < jp->nprocs; i++)
-	    if (tcsetpgrp(ttyfd, jp->ps[i].pid) != -1)
-		    break;
-
-	if (i >= jp->nprocs) {
-		error("Cannot set tty process group (%s) at %d",
-		    strerror(errno), __LINE__);
-	}
-	restartjob(jp);
-	INTOFF;
-	status = waitforjob(jp);
-	INTON;
-	return status;
-}
-
-static void
-set_curjob(struct job *jp, int mode)
-{
-	struct job *jp1, *jp2;
-	int i, ji;
-
-	ji = jp - jobtab;
-
-	/* first remove from list */
-	if (ji == curjob)
-		curjob = jp->prev_job;
-	else {
-		for (i = 0; i < njobs; i++) {
-			if (jobtab[i].prev_job != ji)
-				continue;
-			jobtab[i].prev_job = jp->prev_job;
-			break;
-		}
-	}
-
-	/* Then re-insert in correct position */
-	switch (mode) {
-	case 0:	/* job being deleted */
-		jp->prev_job = -1;
-		break;
-	case 1:	/* newly created job or backgrounded job,
-		   put after all stopped jobs. */
-		if (curjob != -1 && jobtab[curjob].state == JOBSTOPPED) {
-			for (jp1 = jobtab + curjob; ; jp1 = jp2) {
-				if (jp1->prev_job == -1)
-					break;
-				jp2 = jobtab + jp1->prev_job;
-				if (jp2->state != JOBSTOPPED)
-					break;
-			}
-			jp->prev_job = jp1->prev_job;
-			jp1->prev_job = ji;
-			break;
-		}
-		/* FALLTHROUGH */
-	case 2:	/* newly stopped job - becomes curjob */
-		jp->prev_job = curjob;
-		curjob = ji;
-		break;
-	}
-}
-
-int
-bgcmd(int argc, char **argv)
-{
-	struct job *jp;
-	int i;
-
-	nextopt("");
-	do {
-		jp = getjob(*argptr, 0);
-		if (jp->jobctl == 0)
-			error("job not created under job control");
-		set_curjob(jp, 1);
-		out1fmt("[%ld] %s", (long)(jp - jobtab + 1), jp->ps[0].cmd);
-		for (i = 1; i < jp->nprocs; i++)
-			out1fmt(" | %s", jp->ps[i].cmd );
-		out1c('\n');
-		flushall();
-		restartjob(jp);
-	} while (*argptr && *++argptr);
-	return 0;
-}
-
-
-STATIC void
-restartjob(struct job *jp)
-{
-	struct procstat *ps;
-	int i;
-
-	if (jp->state == JOBDONE)
-		return;
-	INTOFF;
-	for (i = 0; i < jp->nprocs; i++)
-		if (killpg(jp->ps[i].pid, SIGCONT) != -1)
-			break;
-	if (i >= jp->nprocs)
-		error("Cannot continue job (%s)", strerror(errno));
-	for (ps = jp->ps, i = jp->nprocs ; --i >= 0 ; ps++) {
-		if (WIFSTOPPED(ps->status)) {
-			ps->status = -1;
-			jp->state = JOBRUNNING;
-		}
-	}
-	INTON;
-}
-#endif
-
-static void
-showjob(struct output *out, struct job *jp, int mode)
-{
-	int procno;
-	int st;
-	struct procstat *ps;
-	int col;
-	char s[64];
-
-#if JOBS
-	if (mode & SHOW_PGID) {
-		/* just output process (group) id of pipeline */
-		outfmt(out, "%ld\n", (long)jp->ps->pid);
-		return;
-	}
-#endif
-
-	procno = jp->nprocs;
-	if (!procno)
-		return;
-
-	if (mode & SHOW_PID)
-		mode |= SHOW_MULTILINE;
-
-	if ((procno > 1 && !(mode & SHOW_MULTILINE))
-	    || (mode & SHOW_SIGNALLED)) {
-		/* See if we have more than one status to report */
-		ps = jp->ps;
-		st = ps->status;
-		do {
-			int st1 = ps->status;
-			if (st1 != st)
-				/* yes - need multi-line output */
-				mode |= SHOW_MULTILINE;
-			if (st1 == -1 || !(mode & SHOW_SIGNALLED) || WIFEXITED(st1))
-				continue;
-			if (WIFSTOPPED(st1) || ((st1 = WTERMSIG(st1) & 0x7f)
-			    && st1 != SIGINT && st1 != SIGPIPE))
-				mode |= SHOW_ISSIG;
-
-		} while (ps++, --procno);
-		procno = jp->nprocs;
-	}
-
-	if (mode & SHOW_SIGNALLED && !(mode & SHOW_ISSIG)) {
-		if (jp->state == JOBDONE && !(mode & SHOW_NO_FREE)) {
-			TRACE(("showjob: freeing job %d\n", jp - jobtab + 1));
-			freejob(jp);
-		}
-		return;
-	}
-
-	for (ps = jp->ps; --procno >= 0; ps++) {	/* for each process */
-		if (ps == jp->ps)
-			fmtstr(s, 16, "[%ld] %c ",
-				(long)(jp - jobtab + 1),
-#if JOBS
-				jp == jobtab + curjob ? '+' :
-				curjob != -1 && jp == jobtab +
-					    jobtab[curjob].prev_job ? '-' :
-#endif
-				' ');
-		else
-			fmtstr(s, 16, "      " );
-		col = strlen(s);
-		if (mode & SHOW_PID) {
-			fmtstr(s + col, 16, "%ld ", (long)ps->pid);
-			     col += strlen(s + col);
-		}
-		if (ps->status == -1) {
-			scopy("Running", s + col);
-		} else if (WIFEXITED(ps->status)) {
-			st = WEXITSTATUS(ps->status);
-			if (st)
-				fmtstr(s + col, 16, "Done(%d)", st);
-			else
-				fmtstr(s + col, 16, "Done");
-		} else {
-#if JOBS
-			if (WIFSTOPPED(ps->status)) 
-				st = WSTOPSIG(ps->status);
-			else /* WIFSIGNALED(ps->status) */
-#endif
-				st = WTERMSIG(ps->status);
-			st &= 0x7f;
-			if (st < NSIG && sys_siglist[st])
-				scopyn(sys_siglist[st], s + col, 32);
-			else
-				fmtstr(s + col, 16, "Signal %d", st);
-			if (WCOREDUMP(ps->status)) {
-				col += strlen(s + col);
-				scopyn(" (core dumped)", s + col,  64 - col);
-			}
-		}
-		col += strlen(s + col);
-		outstr(s, out);
-		do {
-			outc(' ', out);
-			col++;
-		} while (col < 30);
-		outstr(ps->cmd, out);
-		if (mode & SHOW_MULTILINE) {
-			if (procno > 0) {
-				outc(' ', out);
-				outc('|', out);
-			}
-		} else {
-			while (--procno >= 0)
-				outfmt(out, " | %s", (++ps)->cmd );
-		}
-		outc('\n', out);
-	}
-	flushout(out);
-	jp->changed = 0;
-	if (jp->state == JOBDONE && !(mode & SHOW_NO_FREE))
-		freejob(jp);
-}
-
-
-int
-jobscmd(int argc, char **argv)
-{
-	int mode, m;
-	int sv = jobs_invalid;
-
-	jobs_invalid = 0;
-	mode = 0;
-	while ((m = nextopt("lp")))
-		if (m == 'l')
-			mode = SHOW_PID;
-		else
-			mode = SHOW_PGID;
-	if (*argptr)
-		do
-			showjob(out1, getjob(*argptr,0), mode);
-		while (*++argptr);
-	else
-		showjobs(out1, mode);
-	jobs_invalid = sv;
-	return 0;
-}
-
-
-/*
- * Print a list of jobs.  If "change" is nonzero, only print jobs whose
- * statuses have changed since the last call to showjobs.
- *
- * If the shell is interrupted in the process of creating a job, the
- * result may be a job structure containing zero processes.  Such structures
- * will be freed here.
- */
-
-void
-showjobs(struct output *out, int mode)
-{
-	int jobno;
-	struct job *jp;
-	int silent = 0, gotpid;
-
-	TRACE(("showjobs(%x) called\n", mode));
-
-	/* If not even one one job changed, there is nothing to do */
-	gotpid = dowait(0, NULL);
-	while (dowait(0, NULL) > 0)
-		continue;
-#ifdef JOBS
-	/*
-	 * Check if we are not in our foreground group, and if not
-	 * put us in it.
-	 */
-	if (mflag && gotpid != -1 && tcgetpgrp(ttyfd) != getpid()) {
-		if (tcsetpgrp(ttyfd, getpid()) == -1)
-			error("Cannot set tty process group (%s) at %d",
-			    strerror(errno), __LINE__);
-		TRACE(("repaired tty process group\n"));
-		silent = 1;
-	}
-#endif
-	if (jobs_invalid)
-		return;
-
-	for (jobno = 1, jp = jobtab ; jobno <= njobs ; jobno++, jp++) {
-		if (!jp->used)
-			continue;
-		if (jp->nprocs == 0) {
-			freejob(jp);
-			continue;
-		}
-		if ((mode & SHOW_CHANGED) && !jp->changed)
-			continue;
-		if (silent && jp->changed) {
-			jp->changed = 0;
-			continue;
-		}
-		showjob(out, jp, mode);
-	}
-}
-
-/*
- * Mark a job structure as unused.
- */
-
-STATIC void
-freejob(struct job *jp)
-{
-	INTOFF;
-	if (jp->ps != &jp->ps0) {
-		ckfree(jp->ps);
-		jp->ps = &jp->ps0;
-	}
-	jp->nprocs = 0;
-	jp->used = 0;
-#if JOBS
-	set_curjob(jp, 0);
-#endif
-	INTON;
-}
-
-
-
-int
-waitcmd(int argc, char **argv)
-{
-	struct job *job;
-	int status, retval = 127;
-	struct job *jp;
-
-	nextopt("");
-
-	if (!*argptr) {
-		/* wait for all jobs */
-		jp = jobtab;
-		if (jobs_invalid)
-			return 0;
-		for (;;) {
-			if (jp >= jobtab + njobs) {
-				/* no running procs */
-				return 0;
-			}
-			if (!jp->used || jp->state != JOBRUNNING) {
-				jp++;
-				continue;
-			}
-			if (dowait(1, (struct job *)NULL) == -1)
-			       return 128 + SIGINT;
-			jp = jobtab;
-		}
-	}
-
-	for (; *argptr; argptr++) {
-		job = getjob(*argptr, 1);
-		if (!job) {
-			retval = 127;
-			continue;
-		}
-		/* loop until process terminated or stopped */
-		while (job->state == JOBRUNNING) {
-			if (dowait(1, (struct job *)NULL) == -1)
-			       return 128 + SIGINT;
-		}
-		status = job->ps[job->nprocs].status;
-		if (WIFEXITED(status))
-			retval = WEXITSTATUS(status);
-#if JOBS
-		else if (WIFSTOPPED(status))
-			retval = WSTOPSIG(status) + 128;
-#endif
-		else {
-			/* XXX: limits number of signals */
-			retval = WTERMSIG(status) + 128;
-		}
-		if (!iflag)
-			freejob(job);
-	}
-	return retval;
-}
-
-
-
-int
-jobidcmd(int argc, char **argv)
-{
-	struct job *jp;
-	int i;
-
-	nextopt("");
-	jp = getjob(*argptr, 0);
-	for (i = 0 ; i < jp->nprocs ; ) {
-		out1fmt("%ld", (long)jp->ps[i].pid);
-		out1c(++i < jp->nprocs ? ' ' : '\n');
-	}
-	return 0;
-}
-
-int
-getjobpgrp(const char *name)
-{
-	struct job *jp;
-
-	jp = getjob(name, 1);
-	if (jp == 0)
-		return 0;
-	return -jp->ps[0].pid;
-}
-
-/*
- * Convert a job name to a job structure.
- */
-
-STATIC struct job *
-getjob(const char *name, int noerror)
-{
-	int jobno = -1;
-	struct job *jp;
-	int pid;
-	int i;
-	const char *err_msg = "No such job: %s";
-		
-	if (name == NULL) {
-#if JOBS
-		jobno = curjob;
-#endif
-		err_msg = "No current job";
-	} else if (name[0] == '%') {
-		if (is_number(name + 1)) {
-			jobno = number(name + 1) - 1;
-		} else if (!name[2]) {
-			switch (name[1]) {
-#if JOBS
-			case 0:
-			case '+':
-			case '%':
-				jobno = curjob;
-				err_msg = "No current job";
-				break;
-			case '-':
-				jobno = curjob;
-				if (jobno != -1)
-					jobno = jobtab[jobno].prev_job;
-				err_msg = "No previous job";
-				break;
-#endif
-			default:
-				goto check_pattern;
-			}
-		} else {
-			struct job *found;
-    check_pattern:
-			found = NULL;
-			for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
-				if (!jp->used || jp->nprocs <= 0)
-					continue;
-				if ((name[1] == '?'
-					&& strstr(jp->ps[0].cmd, name + 2))
-				    || prefix(name + 1, jp->ps[0].cmd)) {
-					if (found) {
-						err_msg = "%s: ambiguous";
-						found = 0;
-						break;
-					}
-					found = jp;
-				}
-			}
-			if (found)
-				return found;
-		}
-
-	} else if (is_number(name)) {
-		pid = number(name);
-		for (jp = jobtab, i = njobs ; --i >= 0 ; jp++) {
-			if (jp->used && jp->nprocs > 0
-			 && jp->ps[jp->nprocs - 1].pid == pid)
-				return jp;
-		}
-	}
-
-	if (!jobs_invalid && jobno >= 0 && jobno < njobs) {
-		jp = jobtab + jobno;
-		if (jp->used)
-			return jp;
-	}
-	if (!noerror)
-		error(err_msg, name);
-	return 0;
-}
-
-
-
-/*
- * Return a new job structure,
- */
-
-struct job *
-makejob(union node *node, int nprocs)
-{
-	int i;
-	struct job *jp;
-
-	if (jobs_invalid) {
-		for (i = njobs, jp = jobtab ; --i >= 0 ; jp++) {
-			if (jp->used)
-				freejob(jp);
-		}
-		jobs_invalid = 0;
-	}
-
-	for (i = njobs, jp = jobtab ; ; jp++) {
-		if (--i < 0) {
-			INTOFF;
-			if (njobs == 0) {
-				jobtab = ckmalloc(4 * sizeof jobtab[0]);
-			} else {
-				jp = ckmalloc((njobs + 4) * sizeof jobtab[0]);
-				memcpy(jp, jobtab, njobs * sizeof jp[0]);
-				/* Relocate `ps' pointers */
-				for (i = 0; i < njobs; i++)
-					if (jp[i].ps == &jobtab[i].ps0)
-						jp[i].ps = &jp[i].ps0;
-				ckfree(jobtab);
-				jobtab = jp;
-			}
-			jp = jobtab + njobs;
-			for (i = 4 ; --i >= 0 ; jobtab[njobs++].used = 0);
-			INTON;
-			break;
-		}
-		if (jp->used == 0)
-			break;
-	}
-	INTOFF;
-	jp->state = JOBRUNNING;
-	jp->used = 1;
-	jp->changed = 0;
-	jp->nprocs = 0;
-#if JOBS
-	jp->jobctl = jobctl;
-	set_curjob(jp, 1);
-#endif
-	if (nprocs > 1) {
-		jp->ps = ckmalloc(nprocs * sizeof (struct procstat));
-	} else {
-		jp->ps = &jp->ps0;
-	}
-	INTON;
-	TRACE(("makejob(0x%lx, %d) returns %%%d\n", (long)node, nprocs,
-	    jp - jobtab + 1));
-	return jp;
-}
-
-
-/*
- * Fork off a subshell.  If we are doing job control, give the subshell its
- * own process group.  Jp is a job structure that the job is to be added to.
- * N is the command that will be evaluated by the child.  Both jp and n may
- * be NULL.  The mode parameter can be one of the following:
- *	FORK_FG - Fork off a foreground process.
- *	FORK_BG - Fork off a background process.
- *	FORK_NOJOB - Like FORK_FG, but don't give the process its own
- *		     process group even if job control is on.
- *
- * When job control is turned off, background processes have their standard
- * input redirected to /dev/null (except for the second and later processes
- * in a pipeline).
- */
-
-int
-forkshell(struct job *jp, union node *n, int mode)
-{
-	int pid;
-
-	TRACE(("forkshell(%%%d, %p, %d) called\n", jp - jobtab, n, mode));
-	switch ((pid = fork())) {
-	case -1:
-		TRACE(("Fork failed, errno=%d\n", errno));
-		INTON;
-		error("Cannot fork");
-		break;
-	case 0:
-		forkchild(jp, n, mode, 0);
-		return 0;
-	default:
-		return forkparent(jp, n, mode, pid);
-	}
-}
-
-int
-forkparent(struct job *jp, union node *n, int mode, pid_t pid)
-{
-	int pgrp;
-
-	if (rootshell && mode != FORK_NOJOB && mflag) {
-		if (jp == NULL || jp->nprocs == 0)
-			pgrp = pid;
-		else
-			pgrp = jp->ps[0].pid;
-#ifdef USE_PROCESS_GROUPS
-		/* This can fail because we are doing it in the child also */
-		(void)setpgid(pid, pgrp);
-#endif
-	}
-	if (mode == FORK_BG)
-		backgndpid = pid;		/* set $! */
-	if (jp) {
-		struct procstat *ps = &jp->ps[jp->nprocs++];
-		ps->pid = pid;
-		ps->status = -1;
-		ps->cmd[0] = 0;
-		if (/* iflag && rootshell && */ n)
-			commandtext(ps, n);
-	}
-	TRACE(("In parent shell:  child = %d\n", pid));
-	return pid;
-}
-
-void
-forkchild(struct job *jp, union node *n, int mode, int vforked)
-{
-	int wasroot;
-	int pgrp;
-	const char *devnull = _PATH_DEVNULL;
-	const char *nullerr = "Can't open %s";
-
-	wasroot = rootshell;
-	TRACE(("Child shell %d\n", getpid()));
-	if (!vforked)
-		rootshell = 0;
-
-	closescript(vforked);
-	clear_traps(vforked);
-#if JOBS
-	if (!vforked)
-		jobctl = 0;		/* do job control only in root shell */
-	if (wasroot && mode != FORK_NOJOB && mflag) {
-		if (jp == NULL || jp->nprocs == 0)
-			pgrp = getpid();
-		else
-			pgrp = jp->ps[0].pid;
-#ifdef USE_PROCESS_GROUPS
-		/* This can fail because we are doing it in the parent also */
-		(void)setpgid(0, pgrp);
-		if (mode == FORK_FG) {
-			if (tcsetpgrp(ttyfd, pgrp) == -1)
-				error("Cannot set tty process group (%s) at %d",
-				    strerror(errno), __LINE__);
-		}
-#endif
-		setsignal(SIGTSTP, vforked);
-		setsignal(SIGTTOU, vforked);
-	} else if (mode == FORK_BG) {
-		ignoresig(SIGINT, vforked);
-		ignoresig(SIGQUIT, vforked);
-		if ((jp == NULL || jp->nprocs == 0) &&
-		    ! fd0_redirected_p ()) {
-			close(0);
-			if (open(devnull, O_RDONLY) != 0)
-				error(nullerr, devnull);
-		}
-	}
-#else
-	if (mode == FORK_BG) {
-		ignoresig(SIGINT, vforked);
-		ignoresig(SIGQUIT, vforked);
-		if ((jp == NULL || jp->nprocs == 0) &&
-		    ! fd0_redirected_p ()) {
-			close(0);
-			if (open(devnull, O_RDONLY) != 0)
-				error(nullerr, devnull);
-		}
-	}
-#endif
-	if (wasroot && iflag) {
-		setsignal(SIGINT, vforked);
-		setsignal(SIGQUIT, vforked);
-		setsignal(SIGTERM, vforked);
-	}
-
-	if (!vforked)
-		jobs_invalid = 1;
-}
-
-/*
- * Wait for job to finish.
- *
- * Under job control we have the problem that while a child process is
- * running interrupts generated by the user are sent to the child but not
- * to the shell.  This means that an infinite loop started by an inter-
- * active user may be hard to kill.  With job control turned off, an
- * interactive user may place an interactive program inside a loop.  If
- * the interactive program catches interrupts, the user doesn't want
- * these interrupts to also abort the loop.  The approach we take here
- * is to have the shell ignore interrupt signals while waiting for a
- * forground process to terminate, and then send itself an interrupt
- * signal if the child process was terminated by an interrupt signal.
- * Unfortunately, some programs want to do a bit of cleanup and then
- * exit on interrupt; unless these processes terminate themselves by
- * sending a signal to themselves (instead of calling exit) they will
- * confuse this approach.
- */
-
-int
-waitforjob(struct job *jp)
-{
-#if JOBS
-	int mypgrp = getpgrp();
-#endif
-	int status;
-	int st;
-
-	INTOFF;
-	TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1));
-	while (jp->state == JOBRUNNING) {
-		dowait(1, jp);
-	}
-#if JOBS
-	if (jp->jobctl) {
-		if (tcsetpgrp(ttyfd, mypgrp) == -1)
-			error("Cannot set tty process group (%s) at %d",
-			    strerror(errno), __LINE__);
-	}
-	if (jp->state == JOBSTOPPED && curjob != jp - jobtab)
-		set_curjob(jp, 2);
-#endif
-	status = jp->ps[jp->nprocs - 1].status;
-	/* convert to 8 bits */
-	if (WIFEXITED(status))
-		st = WEXITSTATUS(status);
-#if JOBS
-	else if (WIFSTOPPED(status))
-		st = WSTOPSIG(status) + 128;
-#endif
-	else
-		st = WTERMSIG(status) + 128;
-	TRACE(("waitforjob: job %d, nproc %d, status %x, st %x\n",
-		jp - jobtab + 1, jp->nprocs, status, st ));
-#if JOBS
-	if (jp->jobctl) {
-		/*
-		 * This is truly gross.
-		 * If we're doing job control, then we did a TIOCSPGRP which
-		 * caused us (the shell) to no longer be in the controlling
-		 * session -- so we wouldn't have seen any ^C/SIGINT.  So, we
-		 * intuit from the subprocess exit status whether a SIGINT
-		 * occurred, and if so interrupt ourselves.  Yuck.  - mycroft
-		 */
-		if (WIFSIGNALED(status) && WTERMSIG(status) == SIGINT)
-			raise(SIGINT);
-	}
-#endif
-	if (! JOBS || jp->state == JOBDONE)
-		freejob(jp);
-	INTON;
-	return st;
-}
-
-
-
-/*
- * Wait for a process to terminate.
- */
-
-STATIC int
-dowait(int block, struct job *job)
-{
-	int pid;
-	int status;
-	struct procstat *sp;
-	struct job *jp;
-	struct job *thisjob;
-	int done;
-	int stopped;
-	extern volatile char gotsig[];
-
-	TRACE(("dowait(%d) called\n", block));
-	do {
-		pid = waitproc(block, job, &status);
-		TRACE(("wait returns pid %d, status %d\n", pid, status));
-	} while (pid == -1 && errno == EINTR && gotsig[SIGINT - 1] == 0);
-	if (pid <= 0)
-		return pid;
-	INTOFF;
-	thisjob = NULL;
-	for (jp = jobtab ; jp < jobtab + njobs ; jp++) {
-		if (jp->used) {
-			done = 1;
-			stopped = 1;
-			for (sp = jp->ps ; sp < jp->ps + jp->nprocs ; sp++) {
-				if (sp->pid == -1)
-					continue;
-				if (sp->pid == pid) {
-					TRACE(("Job %d: changing status of proc %d from 0x%x to 0x%x\n", jp - jobtab + 1, pid, sp->status, status));
-					sp->status = status;
-					thisjob = jp;
-				}
-				if (sp->status == -1)
-					stopped = 0;
-				else if (WIFSTOPPED(sp->status))
-					done = 0;
-			}
-			if (stopped) {		/* stopped or done */
-				int state = done ? JOBDONE : JOBSTOPPED;
-				if (jp->state != state) {
-					TRACE(("Job %d: changing state from %d to %d\n", jp - jobtab + 1, jp->state, state));
-					jp->state = state;
-#if JOBS
-					if (done)
-						set_curjob(jp, 0);
-#endif
-				}
-			}
-		}
-	}
-
-	if (thisjob && thisjob->state != JOBRUNNING) {
-		int mode = 0;
-		if (!rootshell || !iflag)
-			mode = SHOW_SIGNALLED;
-		if (job == thisjob)
-			mode = SHOW_SIGNALLED | SHOW_NO_FREE;
-		if (mode)
-			showjob(out2, thisjob, mode);
-		else {
-			TRACE(("Not printing status, rootshell=%d, job=%p\n",
-				rootshell, job));
-			thisjob->changed = 1;
-		}
-	}
-
-	INTON;
-	return pid;
-}
-
-
-
-/*
- * Do a wait system call.  If job control is compiled in, we accept
- * stopped processes.  If block is zero, we return a value of zero
- * rather than blocking.
- *
- * System V doesn't have a non-blocking wait system call.  It does
- * have a SIGCLD signal that is sent to a process when one of it's
- * children dies.  The obvious way to use SIGCLD would be to install
- * a handler for SIGCLD which simply bumped a counter when a SIGCLD
- * was received, and have waitproc bump another counter when it got
- * the status of a process.  Waitproc would then know that a wait
- * system call would not block if the two counters were different.
- * This approach doesn't work because if a process has children that
- * have not been waited for, System V will send it a SIGCLD when it
- * installs a signal handler for SIGCLD.  What this means is that when
- * a child exits, the shell will be sent SIGCLD signals continuously
- * until is runs out of stack space, unless it does a wait call before
- * restoring the signal handler.  The code below takes advantage of
- * this (mis)feature by installing a signal handler for SIGCLD and
- * then checking to see whether it was called.  If there are any
- * children to be waited for, it will be.
- *
- * If neither SYSV nor BSD is defined, we don't implement nonblocking
- * waits at all.  In this case, the user will not be informed when
- * a background process until the next time she runs a real program
- * (as opposed to running a builtin command or just typing return),
- * and the jobs command may give out of date information.
- */
-
-#ifdef SYSV
-STATIC int gotsigchild;
-
-STATIC int onsigchild() {
-	gotsigchild = 1;
-}
-#endif
-
-
-STATIC int
-waitproc(int block, struct job *jp, int *status)
-{
-#ifdef BSD
-	int flags = 0;
-
-#if JOBS
-	if (jp != NULL && jp->jobctl)
-		flags |= WUNTRACED;
-#endif
-	if (block == 0)
-		flags |= WNOHANG;
-	return wait3(status, flags, (struct rusage *)NULL);
-#else
-#ifdef SYSV
-	int (*save)();
-
-	if (block == 0) {
-		gotsigchild = 0;
-		save = signal(SIGCLD, onsigchild);
-		signal(SIGCLD, save);
-		if (gotsigchild == 0)
-			return 0;
-	}
-	return wait(status);
-#else
-	if (block == 0)
-		return 0;
-	return wait(status);
-#endif
-#endif
-}
-
-/*
- * return 1 if there are stopped jobs, otherwise 0
- */
-int job_warning = 0;
-int
-stoppedjobs(void)
-{
-	int jobno;
-	struct job *jp;
-
-	if (job_warning || jobs_invalid)
-		return (0);
-	for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) {
-		if (jp->used == 0)
-			continue;
-		if (jp->state == JOBSTOPPED) {
-			out2str("You have stopped jobs.\n");
-			job_warning = 2;
-			return (1);
-		}
-	}
-
-	return (0);
-}
-
-/*
- * Return a string identifying a command (to be printed by the
- * jobs command).
- */
-
-STATIC char *cmdnextc;
-STATIC int cmdnleft;
-
-void
-commandtext(struct procstat *ps, union node *n)
-{
-	int len;
-
-	cmdnextc = ps->cmd;
-	if (iflag || mflag || sizeof ps->cmd < 100)
-		len = sizeof(ps->cmd);
-	else
-		len = sizeof(ps->cmd) / 10;
-	cmdnleft = len;
-	cmdtxt(n);
-	if (cmdnleft <= 0) {
-		char *p = ps->cmd + len - 4;
-		p[0] = '.';
-		p[1] = '.';
-		p[2] = '.';
-		p[3] = 0;
-	} else
-		*cmdnextc = '\0';
-	TRACE(("commandtext: ps->cmd %x, end %x, left %d\n\t\"%s\"\n",
-		ps->cmd, cmdnextc, cmdnleft, ps->cmd));
-}
-
-
-STATIC void
-cmdtxt(union node *n)
-{
-	union node *np;
-	struct nodelist *lp;
-	const char *p;
-	int i;
-	char s[2];
-
-	if (n == NULL || cmdnleft <= 0)
-		return;
-	switch (n->type) {
-	case NSEMI:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs("; ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NAND:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs(" && ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NOR:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs(" || ");
-		cmdtxt(n->nbinary.ch2);
-		break;
-	case NPIPE:
-		for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-			cmdtxt(lp->n);
-			if (lp->next)
-				cmdputs(" | ");
-		}
-		break;
-	case NSUBSHELL:
-		cmdputs("(");
-		cmdtxt(n->nredir.n);
-		cmdputs(")");
-		break;
-	case NREDIR:
-	case NBACKGND:
-		cmdtxt(n->nredir.n);
-		break;
-	case NIF:
-		cmdputs("if ");
-		cmdtxt(n->nif.test);
-		cmdputs("; then ");
-		cmdtxt(n->nif.ifpart);
-		if (n->nif.elsepart) {
-			cmdputs("; else ");
-			cmdtxt(n->nif.elsepart);
-		}
-		cmdputs("; fi");
-		break;
-	case NWHILE:
-		cmdputs("while ");
-		goto until;
-	case NUNTIL:
-		cmdputs("until ");
-until:
-		cmdtxt(n->nbinary.ch1);
-		cmdputs("; do ");
-		cmdtxt(n->nbinary.ch2);
-		cmdputs("; done");
-		break;
-	case NFOR:
-		cmdputs("for ");
-		cmdputs(n->nfor.var);
-		cmdputs(" in ");
-		cmdlist(n->nfor.args, 1);
-		cmdputs("; do ");
-		cmdtxt(n->nfor.body);
-		cmdputs("; done");
-		break;
-	case NCASE:
-		cmdputs("case ");
-		cmdputs(n->ncase.expr->narg.text);
-		cmdputs(" in ");
-		for (np = n->ncase.cases; np; np = np->nclist.next) {
-			cmdtxt(np->nclist.pattern);
-			cmdputs(") ");
-			cmdtxt(np->nclist.body);
-			cmdputs(";; ");
-		}
-		cmdputs("esac");
-		break;
-	case NDEFUN:
-		cmdputs(n->narg.text);
-		cmdputs("() { ... }");
-		break;
-	case NCMD:
-		cmdlist(n->ncmd.args, 1);
-		cmdlist(n->ncmd.redirect, 0);
-		break;
-	case NARG:
-		cmdputs(n->narg.text);
-		break;
-	case NTO:
-		p = ">";  i = 1;  goto redir;
-	case NCLOBBER:
-		p = ">|";  i = 1;  goto redir;
-	case NAPPEND:
-		p = ">>";  i = 1;  goto redir;
-	case NTOFD:
-		p = ">&";  i = 1;  goto redir;
-	case NFROM:
-		p = "<";  i = 0;  goto redir;
-	case NFROMFD:
-		p = "<&";  i = 0;  goto redir;
-	case NFROMTO:
-		p = "<>";  i = 0;  goto redir;
-redir:
-		if (n->nfile.fd != i) {
-			s[0] = n->nfile.fd + '0';
-			s[1] = '\0';
-			cmdputs(s);
-		}
-		cmdputs(p);
-		if (n->type == NTOFD || n->type == NFROMFD) {
-			s[0] = n->ndup.dupfd + '0';
-			s[1] = '\0';
-			cmdputs(s);
-		} else {
-			cmdtxt(n->nfile.fname);
-		}
-		break;
-	case NHERE:
-	case NXHERE:
-		cmdputs("<<...");
-		break;
-	default:
-		cmdputs("???");
-		break;
-	}
-}
-
-STATIC void
-cmdlist(union node *np, int sep)
-{
-	for (; np; np = np->narg.next) {
-		if (!sep)
-			cmdputs(" ");
-		cmdtxt(np);
-		if (sep && np->narg.next)
-			cmdputs(" ");
-	}
-}
-
-
-STATIC void
-cmdputs(const char *s)
-{
-	const char *p, *str = 0;
-	char c, cc[2] = " ";
-	char *nextc;
-	int nleft;
-	int subtype = 0;
-	int quoted = 0;
-	static char vstype[16][4] = { "", "}", "-", "+", "?", "=",
-					"#", "##", "%", "%%" };
-
-	p = s;
-	nextc = cmdnextc;
-	nleft = cmdnleft;
-	while (nleft > 0 && (c = *p++) != 0) {
-		switch (c) {
-		case CTLESC:
-			c = *p++;
-			break;
-		case CTLVAR:
-			subtype = *p++;
-			if ((subtype & VSTYPE) == VSLENGTH)
-				str = "${#";
-			else
-				str = "${";
-			if (!(subtype & VSQUOTE) != !(quoted & 1)) {
-				quoted ^= 1;
-				c = '"';
-			} else
-				c = *str++;
-			break;
-		case CTLENDVAR:
-			if (quoted & 1) {
-				c = '"';
-				str = "}";
-			} else
-				c = '}';
-			quoted >>= 1;
-			subtype = 0;
-			break;
-		case CTLBACKQ:
-			c = '$';
-			str = "(...)";
-			break;
-		case CTLBACKQ+CTLQUOTE:
-			c = '"';
-			str = "$(...)\"";
-			break;
-		case CTLARI:
-			c = '$';
-			str = "((";
-			break;
-		case CTLENDARI:
-			c = ')';
-			str = ")";
-			break;
-		case CTLQUOTEMARK:
-			quoted ^= 1;
-			c = '"';
-			break;
-		case '=':
-			if (subtype == 0)
-				break;
-			str = vstype[subtype & VSTYPE];
-			if (subtype & VSNUL)
-				c = ':';
-			else
-				c = *str++;
-			if (c != '}')
-				quoted <<= 1;
-			break;
-		case '\'':
-		case '\\':
-		case '"':
-		case '$':
-			/* These can only happen inside quotes */
-			cc[0] = c;
-			str = cc;
-			c = '\\';
-			break;
-		default:
-			break;
-		}
-		do {
-			*nextc++ = c;
-		} while (--nleft > 0 && str && (c = *str++));
-		str = 0;
-	}
-	if ((quoted & 1) && nleft) {
-		*nextc++ = '"';
-		nleft--;
-	}
-	cmdnleft = nleft;
-	cmdnextc = nextc;
-}
diff --git a/sh/jobs.h b/sh/jobs.h
deleted file mode 100644
index 47e76c2..0000000
--- a/sh/jobs.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*	$NetBSD: jobs.h,v 1.19 2003/11/27 21:16:14 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)jobs.h	8.2 (Berkeley) 5/4/95
- */
-
-#include "output.h"
-
-/* Mode argument to forkshell.  Don't change FORK_FG or FORK_BG. */
-#define FORK_FG 0
-#define FORK_BG 1
-#define FORK_NOJOB 2
-
-/* mode flags for showjob(s) */
-#define	SHOW_PGID	0x01	/* only show pgid - for jobs -p */
-#define	SHOW_MULTILINE	0x02	/* one line per process */
-#define	SHOW_PID	0x04	/* include process pid */
-#define	SHOW_CHANGED	0x08	/* only jobs whose state has changed */
-#define	SHOW_SIGNALLED	0x10	/* only if stopped/exited on signal */
-#define	SHOW_ISSIG	0x20	/* job was signalled */
-#define	SHOW_NO_FREE	0x40	/* do not free job */
-
-
-/*
- * A job structure contains information about a job.  A job is either a
- * single process or a set of processes contained in a pipeline.  In the
- * latter case, pidlist will be non-NULL, and will point to a -1 terminated
- * array of pids.
- */
-#define	MAXCMDTEXT	200
-
-struct procstat {
-	pid_t	pid;		/* process id */
- 	int	status;		/* last process status from wait() */
- 	char	cmd[MAXCMDTEXT];/* text of command being run */
-};
-
-struct job {
-	struct procstat ps0;	/* status of process */
-	struct procstat *ps;	/* status or processes when more than one */
-	int	nprocs;		/* number of processes */
-	pid_t	pgrp;		/* process group of this job */
-	char	state;
-#define	JOBRUNNING	0	/* at least one proc running */
-#define	JOBSTOPPED	1	/* all procs are stopped */
-#define	JOBDONE		2	/* all procs are completed */
-	char	used;		/* true if this entry is in used */
-	char	changed;	/* true if status has changed */
-#if JOBS
-	char 	jobctl;		/* job running under job control */
-	int	prev_job;	/* previous job index */
-#endif
-};
-
-extern pid_t backgndpid;	/* pid of last background process */
-extern int job_warning;		/* user was warned about stopped jobs */
-
-void setjobctl(int);
-int fgcmd(int, char **);
-int bgcmd(int, char **);
-int jobscmd(int, char **);
-void showjobs(struct output *, int);
-int waitcmd(int, char **);
-int jobidcmd(int, char **);
-struct job *makejob(union node *, int);
-int forkshell(struct job *, union node *, int);
-void forkchild(struct job *, union node *, int, int);
-int forkparent(struct job *, union node *, int, pid_t);
-int waitforjob(struct job *);
-int stoppedjobs(void);
-void commandtext(struct procstat *, union node *);
-int getjobpgrp(const char *);
-
-#if ! JOBS
-#define setjobctl(on)	/* do nothing */
-#endif
diff --git a/sh/machdep.h b/sh/machdep.h
deleted file mode 100644
index 14e803b..0000000
--- a/sh/machdep.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*	$NetBSD: machdep.h,v 1.11 2003/08/07 09:05:33 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)machdep.h	8.2 (Berkeley) 5/4/95
- */
-
-/*
- * Most machines require the value returned from malloc to be aligned
- * in some way.  The following macro will get this right on many machines.
- */
-
-#define SHELL_SIZE (sizeof(union {int i; char *cp; double d; }) - 1)
-/*
- * It appears that grabstackstr() will barf with such alignments
- * because stalloc() will return a string allocated in a new stackblock.
- */
-#define SHELL_ALIGN(nbytes) (((nbytes) + SHELL_SIZE) & ~SHELL_SIZE)
diff --git a/sh/main.c b/sh/main.c
deleted file mode 100644
index 43b154f..0000000
--- a/sh/main.c
+++ /dev/null
@@ -1,394 +0,0 @@
-/*	$NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1991, 1993\n\
-	The Regents of the University of California.  All rights reserved.\n");
-#endif /* not lint */
-
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)main.c	8.7 (Berkeley) 7/19/95";
-#else
-__RCSID("$NetBSD: main.c,v 1.48 2003/09/14 12:09:29 jmmv Exp $");
-#endif
-#endif /* not lint */
-
-#include <errno.h>
-#include <stdio.h>
-#include <signal.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-
-#include "shell.h"
-#include "main.h"
-#include "options.h"
-#include "output.h"
-#include "parser.h"
-#include "nodes.h"
-#include "expand.h"
-#include "eval.h"
-#include "jobs.h"
-#include "input.h"
-#include "trap.h"
-#include "var.h"
-#include "show.h"
-#include "memalloc.h"
-#include "error.h"
-#include "init.h"
-#include "mystring.h"
-#include "exec.h"
-#include "cd.h"
-
-#define PROFILE 0
-
-int rootpid;
-int rootshell;
-STATIC union node *curcmd;
-STATIC union node *prevcmd;
-#if PROFILE
-short profile_buf[16384];
-extern int etext();
-#endif
-
-STATIC void read_profile(const char *);
-STATIC char *find_dot_file(char *);
-int main(int, char **);
-
-/*
- * Main routine.  We initialize things, parse the arguments, execute
- * profiles if we're a login shell, and then call cmdloop to execute
- * commands.  The setjmp call sets up the location to jump to when an
- * exception occurs.  When an exception occurs the variable "state"
- * is used to figure out how far we had gotten.
- */
-
-int
-main(int argc, char **argv)
-{
-	struct jmploc jmploc;
-	struct stackmark smark;
-	volatile int state;
-	char *shinit;
-
-#if PROFILE
-	monitor(4, etext, profile_buf, sizeof profile_buf, 50);
-#endif
-	state = 0;
-	if (setjmp(jmploc.loc)) {
-		/*
-		 * When a shell procedure is executed, we raise the
-		 * exception EXSHELLPROC to clean up before executing
-		 * the shell procedure.
-		 */
-		switch (exception) {
-		case EXSHELLPROC:
-			rootpid = getpid();
-			rootshell = 1;
-			minusc = NULL;
-			state = 3;
-			break;
-
-		case EXEXEC:
-			exitstatus = exerrno;
-			break;
-
-		case EXERROR:
-			exitstatus = 2;
-			break;
-
-		default:
-			break;
-		}
-
-		if (exception != EXSHELLPROC) {
-			if (state == 0 || iflag == 0 || ! rootshell)
-				exitshell(exitstatus);
-		}
-		reset();
-		if (exception == EXINT
-#if ATTY
-		 && (! attyset() || equal(termval(), "emacs"))
-#endif
-		 ) {
-			out2c('\n');
-			flushout(&errout);
-		}
-		popstackmark(&smark);
-		FORCEINTON;				/* enable interrupts */
-		if (state == 1)
-			goto state1;
-		else if (state == 2)
-			goto state2;
-		else if (state == 3)
-			goto state3;
-		else
-			goto state4;
-	}
-	handler = &jmploc;
-#ifdef DEBUG
-#if DEBUG == 2
-	debug = 1;
-#endif
-	opentrace();
-	trputs("Shell args:  ");  trargs(argv);
-#endif
-	rootpid = getpid();
-	rootshell = 1;
-	init();
-	setstackmark(&smark);
-	procargs(argc, argv);
-	if (argv[0] && argv[0][0] == '-') {
-		state = 1;
-		read_profile("/etc/profile");
-state1:
-		state = 2;
-		read_profile(".profile");
-	}
-state2:
-	state = 3;
-	if (getuid() == geteuid() && getgid() == getegid()) {
-		if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') {
-			state = 3;
-			read_profile(shinit);
-		}
-	}
-state3:
-	state = 4;
-	if (sflag == 0 || minusc) {
-		static int sigs[] =  {
-		    SIGINT, SIGQUIT, SIGHUP, 
-#ifdef SIGTSTP
-		    SIGTSTP,
-#endif
-		    SIGPIPE
-		};
-#define SIGSSIZE (sizeof(sigs)/sizeof(sigs[0]))
-		int i;
-
-		for (i = 0; i < SIGSSIZE; i++)
-		    setsignal(sigs[i], 0);
-	}
-
-	if (minusc)
-		evalstring(minusc, 0);
-
-	if (sflag || minusc == NULL) {
-state4:	/* XXX ??? - why isn't this before the "if" statement */
-		cmdloop(1);
-	}
-#if PROFILE
-	monitor(0);
-#endif
-	exitshell(exitstatus);
-	/* NOTREACHED */
-}
-
-
-/*
- * Read and execute commands.  "Top" is nonzero for the top level command
- * loop; it turns on prompting if the shell is interactive.
- */
-
-void
-cmdloop(int top)
-{
-	union node *n;
-	struct stackmark smark;
-	int inter;
-	int numeof = 0;
-
-	TRACE(("cmdloop(%d) called\n", top));
-	setstackmark(&smark);
-	for (;;) {
-		if (pendingsigs)
-			dotrap();
-		inter = 0;
-		if (iflag && top) {
-			inter = 1;
-			showjobs(out2, SHOW_CHANGED);
-			flushout(&errout);
-		}
-		n = parsecmd(inter);
-		/* showtree(n); DEBUG */
-		if (n == NEOF) {
-			if (!top || numeof >= 50)
-				break;
-			if (!stoppedjobs()) {
-				if (!Iflag)
-					break;
-				out2str("\nUse \"exit\" to leave shell.\n");
-			}
-			numeof++;
-		} else if (n != NULL && nflag == 0) {
-			job_warning = (job_warning == 2) ? 1 : 0;
-			numeof = 0;
-			evaltree(n, 0);
-		}
-		popstackmark(&smark);
-		setstackmark(&smark);
-		if (evalskip == SKIPFILE) {
-			evalskip = 0;
-			break;
-		}
-	}
-	popstackmark(&smark);
-}
-
-
-
-/*
- * Read /etc/profile or .profile.  Return on error.
- */
-
-STATIC void
-read_profile(const char *name)
-{
-	int fd;
-	int xflag_set = 0;
-	int vflag_set = 0;
-
-	INTOFF;
-	if ((fd = open(name, O_RDONLY)) >= 0)
-		setinputfd(fd, 1);
-	INTON;
-	if (fd < 0)
-		return;
-	/* -q turns off -x and -v just when executing init files */
-	if (qflag)  {
-	    if (xflag)
-		    xflag = 0, xflag_set = 1;
-	    if (vflag)
-		    vflag = 0, vflag_set = 1;
-	}
-	cmdloop(0);
-	if (qflag)  {
-	    if (xflag_set)
-		    xflag = 1;
-	    if (vflag_set)
-		    vflag = 1;
-	}
-	popfile();
-}
-
-
-
-/*
- * Read a file containing shell functions.
- */
-
-void
-readcmdfile(char *name)
-{
-	int fd;
-
-	INTOFF;
-	if ((fd = open(name, O_RDONLY)) >= 0)
-		setinputfd(fd, 1);
-	else
-		error("Can't open %s", name);
-	INTON;
-	cmdloop(0);
-	popfile();
-}
-
-
-
-/*
- * Take commands from a file.  To be compatible we should do a path
- * search for the file, which is necessary to find sub-commands.
- */
-
-
-STATIC char *
-find_dot_file(char *basename)
-{
-	char *fullname;
-	const char *path = pathval();
-	struct stat statb;
-
-	/* don't try this for absolute or relative paths */
-	if (strchr(basename, '/'))
-		return basename;
-
-	while ((fullname = padvance(&path, basename)) != NULL) {
-		if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
-			/*
-			 * Don't bother freeing here, since it will
-			 * be freed by the caller.
-			 */
-			return fullname;
-		}
-		stunalloc(fullname);
-	}
-
-	/* not found in the PATH */
-	error("%s: not found", basename);
-	/* NOTREACHED */
-}
-
-int
-dotcmd(int argc, char **argv)
-{
-	exitstatus = 0;
-
-	if (argc >= 2) {		/* That's what SVR2 does */
-		char *fullname;
-		struct stackmark smark;
-
-		setstackmark(&smark);
-		fullname = find_dot_file(argv[1]);
-		setinputfile(fullname, 1);
-		commandname = fullname;
-		cmdloop(0);
-		popfile();
-		popstackmark(&smark);
-	}
-	return exitstatus;
-}
-
-
-int
-exitcmd(int argc, char **argv)
-{
-	if (stoppedjobs())
-		return 0;
-	if (argc > 1)
-		exitstatus = number(argv[1]);
-	exitshell(exitstatus);
-	/* NOTREACHED */
-}
diff --git a/sh/main.h b/sh/main.h
deleted file mode 100644
index d198e2d..0000000
--- a/sh/main.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*	$NetBSD: main.h,v 1.10 2003/08/07 09:05:34 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)main.h	8.2 (Berkeley) 5/4/95
- */
-
-extern int rootpid;	/* pid of main shell */
-extern int rootshell;	/* true if we aren't a child of the main shell */
-
-void readcmdfile(char *);
-void cmdloop(int);
-int dotcmd(int, char **);
-int exitcmd(int, char **);
diff --git a/sh/memalloc.c b/sh/memalloc.c
deleted file mode 100644
index 07c14db..0000000
--- a/sh/memalloc.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/*	$NetBSD: memalloc.c,v 1.28 2003/08/07 09:05:34 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)memalloc.c	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: memalloc.c,v 1.28 2003/08/07 09:05:34 agc Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-#include <unistd.h>
-
-#include "shell.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "machdep.h"
-#include "mystring.h"
-
-/*
- * Like malloc, but returns an error when out of space.
- */
-
-pointer
-ckmalloc(int nbytes)
-{
-	pointer p;
-
-	p = malloc(nbytes);
-	if (p == NULL)
-		error("Out of space");
-	return p;
-}
-
-
-/*
- * Same for realloc.
- */
-
-pointer
-ckrealloc(pointer p, int nbytes)
-{
-	p = realloc(p, nbytes);
-	if (p == NULL)
-		error("Out of space");
-	return p;
-}
-
-
-/*
- * Make a copy of a string in safe storage.
- */
-
-char *
-savestr(const char *s)
-{
-	char *p;
-
-	p = ckmalloc(strlen(s) + 1);
-	scopy(s, p);
-	return p;
-}
-
-
-/*
- * Parse trees for commands are allocated in lifo order, so we use a stack
- * to make this more efficient, and also to avoid all sorts of exception
- * handling code to handle interrupts in the middle of a parse.
- *
- * The size 504 was chosen because the Ultrix malloc handles that size
- * well.
- */
-
-#define MINSIZE 504		/* minimum size of a block */
-
-struct stack_block {
-	struct stack_block *prev;
-	char space[MINSIZE];
-};
-
-struct stack_block stackbase;
-struct stack_block *stackp = &stackbase;
-struct stackmark *markp;
-char *stacknxt = stackbase.space;
-int stacknleft = MINSIZE;
-int sstrnleft;
-int herefd = -1;
-
-pointer
-stalloc(int nbytes)
-{
-	char *p;
-
-	nbytes = SHELL_ALIGN(nbytes);
-	if (nbytes > stacknleft) {
-		int blocksize;
-		struct stack_block *sp;
-
-		blocksize = nbytes;
-		if (blocksize < MINSIZE)
-			blocksize = MINSIZE;
-		INTOFF;
-		sp = ckmalloc(sizeof(struct stack_block) - MINSIZE + blocksize);
-		sp->prev = stackp;
-		stacknxt = sp->space;
-		stacknleft = blocksize;
-		stackp = sp;
-		INTON;
-	}
-	p = stacknxt;
-	stacknxt += nbytes;
-	stacknleft -= nbytes;
-	return p;
-}
-
-
-void
-stunalloc(pointer p)
-{
-	if (p == NULL) {		/*DEBUG */
-		write(2, "stunalloc\n", 10);
-		abort();
-	}
-	stacknleft += stacknxt - (char *)p;
-	stacknxt = p;
-}
-
-
-
-void
-setstackmark(struct stackmark *mark)
-{
-	mark->stackp = stackp;
-	mark->stacknxt = stacknxt;
-	mark->stacknleft = stacknleft;
-	mark->marknext = markp;
-	markp = mark;
-}
-
-
-void
-popstackmark(struct stackmark *mark)
-{
-	struct stack_block *sp;
-
-	INTOFF;
-	markp = mark->marknext;
-	while (stackp != mark->stackp) {
-		sp = stackp;
-		stackp = sp->prev;
-		ckfree(sp);
-	}
-	stacknxt = mark->stacknxt;
-	stacknleft = mark->stacknleft;
-	INTON;
-}
-
-
-/*
- * When the parser reads in a string, it wants to stick the string on the
- * stack and only adjust the stack pointer when it knows how big the
- * string is.  Stackblock (defined in stack.h) returns a pointer to a block
- * of space on top of the stack and stackblocklen returns the length of
- * this block.  Growstackblock will grow this space by at least one byte,
- * possibly moving it (like realloc).  Grabstackblock actually allocates the
- * part of the block that has been used.
- */
-
-void
-growstackblock(void)
-{
-	int newlen = SHELL_ALIGN(stacknleft * 2 + 100);
-
-	if (stacknxt == stackp->space && stackp != &stackbase) {
-		struct stack_block *oldstackp;
-		struct stackmark *xmark;
-		struct stack_block *sp;
-
-		INTOFF;
-		oldstackp = stackp;
-		sp = stackp;
-		stackp = sp->prev;
-		sp = ckrealloc((pointer)sp,
-		    sizeof(struct stack_block) - MINSIZE + newlen);
-		sp->prev = stackp;
-		stackp = sp;
-		stacknxt = sp->space;
-		stacknleft = newlen;
-
-		/*
-		 * Stack marks pointing to the start of the old block
-		 * must be relocated to point to the new block 
-		 */
-		xmark = markp;
-		while (xmark != NULL && xmark->stackp == oldstackp) {
-			xmark->stackp = stackp;
-			xmark->stacknxt = stacknxt;
-			xmark->stacknleft = stacknleft;
-			xmark = xmark->marknext;
-		}
-		INTON;
-	} else {
-		char *oldspace = stacknxt;
-		int oldlen = stacknleft;
-		char *p = stalloc(newlen);
-
-		(void)memcpy(p, oldspace, oldlen);
-		stacknxt = p;			/* free the space */
-		stacknleft += newlen;		/* we just allocated */
-	}
-}
-
-void
-grabstackblock(int len)
-{
-	len = SHELL_ALIGN(len);
-	stacknxt += len;
-	stacknleft -= len;
-}
-
-/*
- * The following routines are somewhat easier to use than the above.
- * The user declares a variable of type STACKSTR, which may be declared
- * to be a register.  The macro STARTSTACKSTR initializes things.  Then
- * the user uses the macro STPUTC to add characters to the string.  In
- * effect, STPUTC(c, p) is the same as *p++ = c except that the stack is
- * grown as necessary.  When the user is done, she can just leave the
- * string there and refer to it using stackblock().  Or she can allocate
- * the space for it using grabstackstr().  If it is necessary to allow
- * someone else to use the stack temporarily and then continue to grow
- * the string, the user should use grabstack to allocate the space, and
- * then call ungrabstr(p) to return to the previous mode of operation.
- *
- * USTPUTC is like STPUTC except that it doesn't check for overflow.
- * CHECKSTACKSPACE can be called before USTPUTC to ensure that there
- * is space for at least one character.
- */
-
-char *
-growstackstr(void)
-{
-	int len = stackblocksize();
-	if (herefd >= 0 && len >= 1024) {
-		xwrite(herefd, stackblock(), len);
-		sstrnleft = len - 1;
-		return stackblock();
-	}
-	growstackblock();
-	sstrnleft = stackblocksize() - len - 1;
-	return stackblock() + len;
-}
-
-/*
- * Called from CHECKSTRSPACE.
- */
-
-char *
-makestrspace(void)
-{
-	int len = stackblocksize() - sstrnleft;
-	growstackblock();
-	sstrnleft = stackblocksize() - len;
-	return stackblock() + len;
-}
-
-void
-ungrabstackstr(char *s, char *p)
-{
-	stacknleft += stacknxt - s;
-	stacknxt = s;
-	sstrnleft = stacknleft - (p - s);
-
-}
diff --git a/sh/memalloc.h b/sh/memalloc.h
deleted file mode 100644
index e793880..0000000
--- a/sh/memalloc.h
+++ /dev/null
@@ -1,77 +0,0 @@
-/*	$NetBSD: memalloc.h,v 1.14 2003/08/07 09:05:34 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)memalloc.h	8.2 (Berkeley) 5/4/95
- */
-
-struct stackmark {
-	struct stack_block *stackp;
-	char *stacknxt;
-	int stacknleft;
-	struct stackmark *marknext;
-};
-
-
-extern char *stacknxt;
-extern int stacknleft;
-extern int sstrnleft;
-extern int herefd;
-
-pointer ckmalloc(int);
-pointer ckrealloc(pointer, int);
-char *savestr(const char *);
-pointer stalloc(int);
-void stunalloc(pointer);
-void setstackmark(struct stackmark *);
-void popstackmark(struct stackmark *);
-void growstackblock(void);
-void grabstackblock(int);
-char *growstackstr(void);
-char *makestrspace(void);
-void ungrabstackstr(char *, char *);
-
-
-
-#define stackblock() stacknxt
-#define stackblocksize() stacknleft
-#define STARTSTACKSTR(p)	p = stackblock(), sstrnleft = stackblocksize()
-#define STPUTC(c, p)	(--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
-#define CHECKSTRSPACE(n, p)	{ if (sstrnleft < n) p = makestrspace(); }
-#define USTPUTC(c, p)	(--sstrnleft, *p++ = (c))
-#define STACKSTRNUL(p)	(sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
-#define STUNPUTC(p)	(++sstrnleft, --p)
-#define STTOPC(p)	p[-1]
-#define STADJUST(amount, p)	(p += (amount), sstrnleft -= (amount))
-#define grabstackstr(p)	stalloc(stackblocksize() - sstrnleft)
-
-#define ckfree(p)	free((pointer)(p))
diff --git a/sh/miscbltin.c b/sh/miscbltin.c
deleted file mode 100644
index d89029a..0000000
--- a/sh/miscbltin.c
+++ /dev/null
@@ -1,445 +0,0 @@
-/*	$NetBSD: miscbltin.c,v 1.34.2.1 2005/04/07 11:34:20 tron Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)miscbltin.c	8.4 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: miscbltin.c,v 1.34.2.1 2005/04/07 11:34:20 tron Exp $");
-#endif
-#endif /* not lint */
-
-/*
- * Miscelaneous builtins.
- */
-
-#include <sys/types.h>		/* quad_t */
-#include <sys/param.h>		/* BSD4_4 */
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/resource.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <errno.h>
-
-#include "shell.h"
-#include "options.h"
-#include "var.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "miscbltin.h"
-#include "mystring.h"
-
-#undef rflag
-
-
-
-/*
- * The read builtin.
- * Backslahes escape the next char unless -r is specified.
- *
- * This uses unbuffered input, which may be avoidable in some cases.
- *
- * Note that if IFS=' :' then read x y should work so that:
- * 'a b'	x='a', y='b'
- * ' a b '	x='a', y='b'
- * ':b'		x='',  y='b'
- * ':'		x='',  y=''
- * '::'		x='',  y=''
- * ': :'	x='',  y=''
- * ':::'	x='',  y='::'
- * ':b c:'	x='',  y='b c:'
- */
-
-int
-readcmd(int argc, char **argv)
-{
-	char **ap;
-	char c;
-	int rflag;
-	char *prompt;
-	const char *ifs;
-	char *p;
-	int startword;
-	int status;
-	int i;
-	int is_ifs;
-	int saveall = 0;
-
-	rflag = 0;
-	prompt = NULL;
-	while ((i = nextopt("p:r")) != '\0') {
-		if (i == 'p')
-			prompt = optionarg;
-		else
-			rflag = 1;
-	}
-
-	if (prompt && isatty(0)) {
-		out2str(prompt);
-		flushall();
-	}
-
-	if (*(ap = argptr) == NULL)
-		error("arg count");
-
-	if ((ifs = bltinlookup("IFS", 1)) == NULL)
-		ifs = " \t\n";
-
-	status = 0;
-	startword = 2;
-	STARTSTACKSTR(p);
-	for (;;) {
-		if (read(0, &c, 1) != 1) {
-			status = 1;
-			break;
-		}
-		if (c == '\0')
-			continue;
-		if (c == '\\' && !rflag) {
-			if (read(0, &c, 1) != 1) {
-				status = 1;
-				break;
-			}
-			if (c != '\n')
-				STPUTC(c, p);
-			continue;
-		}
-		if (c == '\n')
-			break;
-		if (strchr(ifs, c))
-			is_ifs = strchr(" \t\n", c) ? 1 : 2;
-		else
-			is_ifs = 0;
-
-		if (startword != 0) {
-			if (is_ifs == 1) {
-				/* Ignore leading IFS whitespace */
-				if (saveall)
-					STPUTC(c, p);
-				continue;
-			}
-			if (is_ifs == 2 && startword == 1) {
-				/* Only one non-whitespace IFS per word */
-				startword = 2;
-				if (saveall)
-					STPUTC(c, p);
-				continue;
-			}
-		}
-
-		if (is_ifs == 0) {
-			/* append this character to the current variable */
-			startword = 0;
-			if (saveall)
-				/* Not just a spare terminator */
-				saveall++;
-			STPUTC(c, p);
-			continue;
-		}
-
-		/* end of variable... */
-		startword = is_ifs;
-
-		if (ap[1] == NULL) {
-			/* Last variable needs all IFS chars */
-			saveall++;
-			STPUTC(c, p);
-			continue;
-		}
-
-		STACKSTRNUL(p);
-		setvar(*ap, stackblock(), 0);
-		ap++;
-		STARTSTACKSTR(p);
-	}
-	STACKSTRNUL(p);
-
-	/* Remove trailing IFS chars */
-	for (; stackblock() <= --p; *p = 0) {
-		if (!strchr(ifs, *p))
-			break;
-		if (strchr(" \t\n", *p))
-			/* Always remove whitespace */
-			continue;
-		if (saveall > 1)
-			/* Don't remove non-whitespace unless it was naked */
-			break;
-	}
-	setvar(*ap, stackblock(), 0);
-
-	/* Set any remaining args to "" */
-	while (*++ap != NULL)
-		setvar(*ap, nullstr, 0);
-	return status;
-}
-
-
-
-int
-umaskcmd(int argc, char **argv)
-{
-	char *ap;
-	int mask;
-	int i;
-	int symbolic_mode = 0;
-
-	while ((i = nextopt("S")) != '\0') {
-		symbolic_mode = 1;
-	}
-
-	INTOFF;
-	mask = umask(0);
-	umask(mask);
-	INTON;
-
-	if ((ap = *argptr) == NULL) {
-		if (symbolic_mode) {
-			char u[4], g[4], o[4];
-
-			i = 0;
-			if ((mask & S_IRUSR) == 0)
-				u[i++] = 'r';
-			if ((mask & S_IWUSR) == 0)
-				u[i++] = 'w';
-			if ((mask & S_IXUSR) == 0)
-				u[i++] = 'x';
-			u[i] = '\0';
-
-			i = 0;
-			if ((mask & S_IRGRP) == 0)
-				g[i++] = 'r';
-			if ((mask & S_IWGRP) == 0)
-				g[i++] = 'w';
-			if ((mask & S_IXGRP) == 0)
-				g[i++] = 'x';
-			g[i] = '\0';
-
-			i = 0;
-			if ((mask & S_IROTH) == 0)
-				o[i++] = 'r';
-			if ((mask & S_IWOTH) == 0)
-				o[i++] = 'w';
-			if ((mask & S_IXOTH) == 0)
-				o[i++] = 'x';
-			o[i] = '\0';
-
-			out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
-		} else {
-			out1fmt("%.4o\n", mask);
-		}
-	} else {
-		if (isdigit((unsigned char)*ap)) {
-			mask = 0;
-			do {
-				if (*ap >= '8' || *ap < '0')
-					error("Illegal number: %s", argv[1]);
-				mask = (mask << 3) + (*ap - '0');
-			} while (*++ap != '\0');
-			umask(mask);
-		} else
-			error("Illegal mode: %s", ap);
-	}
-	return 0;
-}
-
-#if 1
-/*
- * ulimit builtin
- *
- * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
- * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
- * ash by J.T. Conklin.
- *
- * Public domain.
- */
-
-struct limits {
-	const char *name;
-	int	cmd;
-	int	factor;	/* multiply by to get rlim_{cur,max} values */
-	char	option;
-};
-
-static const struct limits limits[] = {
-#ifdef RLIMIT_CPU
-	{ "time(seconds)",		RLIMIT_CPU,	   1, 't' },
-#endif
-#ifdef RLIMIT_FSIZE
-	{ "file(blocks)",		RLIMIT_FSIZE,	 512, 'f' },
-#endif
-#ifdef RLIMIT_DATA
-	{ "data(kbytes)",		RLIMIT_DATA,	1024, 'd' },
-#endif
-#ifdef RLIMIT_STACK
-	{ "stack(kbytes)",		RLIMIT_STACK,	1024, 's' },
-#endif
-#ifdef  RLIMIT_CORE
-	{ "coredump(blocks)",		RLIMIT_CORE,	 512, 'c' },
-#endif
-#ifdef RLIMIT_RSS
-	{ "memory(kbytes)",		RLIMIT_RSS,	1024, 'm' },
-#endif
-#ifdef RLIMIT_MEMLOCK
-	{ "locked memory(kbytes)",	RLIMIT_MEMLOCK, 1024, 'l' },
-#endif
-#ifdef RLIMIT_NPROC
-	{ "process(processes)",		RLIMIT_NPROC,      1, 'p' },
-#endif
-#ifdef RLIMIT_NOFILE
-	{ "nofiles(descriptors)",	RLIMIT_NOFILE,     1, 'n' },
-#endif
-#ifdef RLIMIT_VMEM
-	{ "vmemory(kbytes)",		RLIMIT_VMEM,	1024, 'v' },
-#endif
-#ifdef RLIMIT_SWAP
-	{ "swap(kbytes)",		RLIMIT_SWAP,	1024, 'w' },
-#endif
-#ifdef RLIMIT_SBSIZE
-	{ "sbsize(bytes)",		RLIMIT_SBSIZE,	   1, 'b' },
-#endif
-	{ (char *) 0,			0,		   0,  '\0' }
-};
-
-int
-ulimitcmd(int argc, char **argv)
-{
-	int	c;
-	rlim_t val = 0;
-	enum { SOFT = 0x1, HARD = 0x2 }
-			how = SOFT | HARD;
-	const struct limits	*l;
-	int		set, all = 0;
-	int		optc, what;
-	struct rlimit	limit;
-
-	what = 'f';
-	while ((optc = nextopt("HSabtfdsmcnpl")) != '\0')
-		switch (optc) {
-		case 'H':
-			how = HARD;
-			break;
-		case 'S':
-			how = SOFT;
-			break;
-		case 'a':
-			all = 1;
-			break;
-		default:
-			what = optc;
-		}
-
-	for (l = limits; l->name && l->option != what; l++)
-		;
-	if (!l->name)
-		error("internal error (%c)", what);
-
-	set = *argptr ? 1 : 0;
-	if (set) {
-		char *p = *argptr;
-
-		if (all || argptr[1])
-			error("too many arguments");
-		if (strcmp(p, "unlimited") == 0)
-			val = RLIM_INFINITY;
-		else {
-			val = (rlim_t) 0;
-
-			while ((c = *p++) >= '0' && c <= '9')
-			{
-				val = (val * 10) + (long)(c - '0');
-				if ((long)val < 0)
-					break;
-			}
-			if (c)
-				error("bad number");
-			val *= l->factor;
-		}
-	}
-	if (all) {
-		for (l = limits; l->name; l++) {
-			getrlimit(l->cmd, &limit);
-			if (how & SOFT)
-				val = limit.rlim_cur;
-			else if (how & HARD)
-				val = limit.rlim_max;
-
-			out1fmt("%-20s ", l->name);
-			if (val == RLIM_INFINITY)
-				out1fmt("unlimited\n");
-			else
-			{
-				val /= l->factor;
-#ifdef BSD4_4
-				out1fmt("%lld\n", (long long) val);
-#else
-				out1fmt("%ld\n", (long) val);
-#endif
-			}
-		}
-		return 0;
-	}
-
-	getrlimit(l->cmd, &limit);
-	if (set) {
-		if (how & HARD)
-			limit.rlim_max = val;
-		if (how & SOFT)
-			limit.rlim_cur = val;
-		if (setrlimit(l->cmd, &limit) < 0)
-			error("error setting limit (%s)", strerror(errno));
-	} else {
-		if (how & SOFT)
-			val = limit.rlim_cur;
-		else if (how & HARD)
-			val = limit.rlim_max;
-
-		if (val == RLIM_INFINITY)
-			out1fmt("unlimited\n");
-		else
-		{
-			val /= l->factor;
-#ifdef BSD4_4
-			out1fmt("%lld\n", (long long) val);
-#else
-			out1fmt("%ld\n", (long) val);
-#endif
-		}
-	}
-	return 0;
-}
-#endif
diff --git a/sh/miscbltin.h b/sh/miscbltin.h
deleted file mode 100644
index 4c12c82..0000000
--- a/sh/miscbltin.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*	$NetBSD: miscbltin.h,v 1.3 2003/08/21 17:57:53 christos Exp $	*/
-
-/*
- * Copyright (c) 1997 Christos Zoulas.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-int readcmd(int, char **);
-int umaskcmd(int, char **);
-int ulimitcmd(int, char **);
diff --git a/sh/mkbuiltins b/sh/mkbuiltins
deleted file mode 100644
index 5b19269..0000000
--- a/sh/mkbuiltins
+++ /dev/null
@@ -1,136 +0,0 @@
-#!/bin/sh -
-#	$NetBSD: mkbuiltins,v 1.21 2004/06/06 07:03:11 christos Exp $
-#
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)mkbuiltins	8.2 (Berkeley) 5/4/95
-
-havehist=1
-if [ "X$1" = "X-h" ]; then
-	havehist=0
-	shift
-fi
-
-shell=$1
-builtins=$2
-objdir=$3
-
-havejobs=0
-if grep '^#define JOBS[	 ]*1' ${shell} > /dev/null
-then
-	havejobs=1
-fi
-
-exec <$builtins 3> ${objdir}/builtins.c 4> ${objdir}/builtins.h
-
-echo '/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include "shell.h"
-#include "builtins.h"
-
-const struct builtincmd builtincmd[] = {
-' >&3
-
-echo '/*
- * This file was generated by the mkbuiltins program.
- */
-
-#include <sys/cdefs.h>
-
-struct builtincmd {
-      const char *name;
-      int (*builtin)(int, char **);
-};
-
-extern const struct builtincmd builtincmd[];
-extern const struct builtincmd splbltincmd[];
-
-' >&4
-
-specials=
-
-while read line
-do
-	set -- $line
-	[ -z "$1" ] && continue
-	case "$1" in
-	\#if*|\#def*|\#end*)
-		echo $line >&3
-		echo $line >&4
-		continue
-		;;
-	esac
-	l1="${line###}"
-	[ "$l1" != "$line" ] && continue
-
-
-	func=$1
-	shift
-	[ x"$1" = x'-j' ] && {
-		[ $havejobs = 0 ] && continue
-		shift
-	}
-	[ x"$1" = x'-h' ] && {
-		[ $havehist = 0 ] && continue
-		shift
-	}
-	echo 'int '"$func"'(int, char **);' >&4
-	while
-		[ $# != 0 -a "$1" != '#' ]
-	do
-		[ "$1" = '-s' ] && {
-			specials="$specials $2 $func"
-			shift 2
-			continue;
-		}
-		[ "$1" = '-u' ] && shift
-		echo '	{ "'$1'",	'"$func"' },' >&3
-		shift
-	done
-done
-
-echo '	{ 0, 0 },' >&3
-echo '};' >&3
-echo >&3
-echo 'const struct builtincmd splbltincmd[] = {' >&3
-
-set -- $specials
-while
-	[ $# != 0 ]
-do
-	echo '	{ "'$1'",	'"$2"' },' >&3
-	shift 2
-done
-
-echo '	{ 0, 0 },' >&3
-echo "};" >&3
diff --git a/sh/mkinit.sh b/sh/mkinit.sh
deleted file mode 100644
index cae27dd..0000000
--- a/sh/mkinit.sh
+++ /dev/null
@@ -1,197 +0,0 @@
-#! /bin/sh
-#	$NetBSD: mkinit.sh,v 1.2 2004/06/15 23:09:54 dsl Exp $
-
-# Copyright (c) 2003 The NetBSD Foundation, Inc.
-# All rights reserved.
-#
-# This code is derived from software contributed to The NetBSD Foundation
-# by David Laight.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of The NetBSD Foundation nor the names of its
-#    contributors may be used to endorse or promote products derived
-#    from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
-# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
-# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-
-srcs="$*"
-
-nl='
-'
-openparen='('
-backslash='\'
-
-includes=' "shell.h" "mystring.h" "init.h" '
-defines=
-decles=
-event_init=
-event_reset=
-event_shellproc=
-
-for src in $srcs; do
-	exec <$src
-	decnl="$nl"
-	while IFS=; read -r line; do
-		[ "$line" = x ]
-		case "$line " in
-		INIT["{ 	"]* ) event=init;;
-		RESET["{ 	"]* ) event=reset;;
-		SHELLPROC["{ 	"]* ) event=shellproc;;
-		INCLUDE[\ \	]* )
-			IFS=' 	'
-			set -- $line
-			# ignore duplicates
-			[ "${includes}" != "${includes%* $2 }" ] && continue
-			includes="$includes$2 "
-			continue
-			;;
-		MKINIT\  )
-			# struct declaration
-			decles="$decles$nl"
-			while
-				read -r line
-				decles="${decles}${line}${nl}"
-				[ "$line" != "};" ]
-			do
-				:
-			done
-			decnl="$nl"
-			continue
-			;;
-		MKINIT["{ 	"]* )
-			# strip initialiser
-			def=${line#MKINIT}
-			comment="${def#*;}"
-			def="${def%;$comment}"
-			def="${def%%=*}"
-			def="${def% }"
-			decles="${decles}${decnl}extern${def};${comment}${nl}"
-			decnl=
-			continue
-			;;
-		\#define[\ \	]* )
-			IFS=' 	'
-			set -- $line
-			# Ignore those with arguments
-			[ "$2" = "${2##*$openparen}" ] || continue
-			# and multiline definitions
-			[ "$line" = "${line%$backslash}" ] || continue
-			defines="${defines}#undef  $2${nl}${line}${nl}"
-			continue
-			;;
-		* ) continue;;
-		esac
-		# code for events
-		ev="${nl}      /* from $src: */${nl}      {${nl}"
-		while
-			read -r line
-			[ "$line" != "}" ]
-		do
-			# The C program indented by an extra 6 chars using
-			# tabs then spaces. I need to compare the output :-(
-			indent=6
-			while
-				l=${line#	}
-				[ "$l" != "$line" ]
-			do
-				indent=$(($indent + 8))
-				line="$l"
-			done
-			while
-				l=${line# }
-				[ "$l" != "$line" ]
-			do
-				indent=$(($indent + 1))
-				line="$l"
-			done
-			[ -z "$line" -o "$line" != "${line###}" ] && indent=0
-			while
-				[ $indent -ge 8 ]
-			do
-				ev="$ev	"
-				indent="$(($indent - 8))"
-			done
-			while
-				[ $indent -gt 0 ]
-			do
-				ev="$ev "
-				indent="$(($indent - 1))"
-			done
-			ev="${ev}${line}${nl}"
-		done
-		ev="${ev}      }${nl}"
-		eval event_$event=\"\$event_$event\$ev\"
-	done
-done
-
-exec >init.c.tmp
-
-echo "/*"
-echo " * This file was generated by the mkinit program."
-echo " */"
-echo
-
-IFS=' '
-for f in $includes; do
-	echo "#include $f"
-done
-
-echo
-echo
-echo
-echo "$defines"
-echo
-echo "$decles"
-echo
-echo
-echo "/*"
-echo " * Initialization code."
-echo " */"
-echo
-echo "void"
-echo "init() {"
-echo "${event_init%$nl}"
-echo "}"
-echo
-echo
-echo
-echo "/*"
-echo " * This routine is called when an error or an interrupt occurs in an"
-echo " * interactive shell and control is returned to the main command loop."
-echo " */"
-echo
-echo "void"
-echo "reset() {"
-echo "${event_reset%$nl}"
-echo "}"
-echo
-echo
-echo
-echo "/*"
-echo " * This routine is called to initialize the shell to run a shell procedure."
-echo " */"
-echo
-echo "void"
-echo "initshellproc() {"
-echo "${event_shellproc%$nl}"
-echo "}"
-
-exec >&-
-mv init.c.tmp init.c
diff --git a/sh/mknodes.sh b/sh/mknodes.sh
deleted file mode 100644
index 54d2e3d..0000000
--- a/sh/mknodes.sh
+++ /dev/null
@@ -1,217 +0,0 @@
-#! /bin/sh
-#	$NetBSD: mknodes.sh,v 1.1 2004/01/16 23:24:38 dsl Exp $
-
-# Copyright (c) 2003 The NetBSD Foundation, Inc.
-# All rights reserved.
-#
-# This code is derived from software contributed to The NetBSD Foundation
-# by David Laight.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of The NetBSD Foundation nor the names of its
-#    contributors may be used to endorse or promote products derived
-#    from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
-# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
-# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-# POSSIBILITY OF SUCH DAMAGE.
-
-nodetypes=$1
-nodes_pat=$2
-objdir="$3"
-
-exec <$nodetypes
-exec >$objdir/nodes.h.tmp
-
-echo "/*"
-echo " * This file was generated by mknodes.sh"
-echo " */"
-echo
-
-tagno=0
-while IFS=; read -r line; do
-	line="${line%%#*}"
-	IFS=' 	'
-	set -- $line
-	IFS=
-	[ -z "$2" ] && continue
-	case "$line" in
-	[" 	"]* )
-		IFS=' '
-		[ $field = 0 ] && struct_list="$struct_list $struct"
-		eval field_${struct}_$field=\"\$*\"
-		eval numfld_$struct=\$field
-		field=$(($field + 1))
-		;;
-	* )
-		define=$1
-		struct=$2
-		echo "#define $define $tagno"
-		tagno=$(($tagno + 1))
-		eval define_$struct=\"\$define_$struct \$define\"
-		struct_define="$struct_define $struct"
-		field=0
-		;;
-	esac
-done
-
-echo
-
-IFS=' '
-for struct in $struct_list; do
-	echo
-	echo
-	echo "struct $struct {"
-	field=0
-	while
-		eval line=\"\$field_${struct}_$field\"
-		field=$(($field + 1))
-		[ -n "$line" ]
-	do
-		IFS=' '
-		set -- $line
-		name=$1
-		case $2 in
-		nodeptr ) type="union node *";;
-		nodelist ) type="struct nodelist *";;
-		string ) type="char *";;
-		int ) type="int ";;
-		* ) name=; shift 2; type="$*";;
-		esac
-		echo "      $type$name;"
-	done
-	echo "};"
-done
-
-echo
-echo
-echo "union node {"
-echo "      int type;"
-for struct in $struct_list; do
-	echo "      struct $struct $struct;"
-done
-echo "};"
-echo
-echo
-echo "struct nodelist {"
-echo "	struct nodelist *next;"
-echo "	union node *n;"
-echo "};"
-echo
-echo
-echo "union node *copyfunc(union node *);"
-echo "void freefunc(union node *);"
-
-mv $objdir/nodes.h.tmp $objdir/nodes.h || exit 1
-
-exec <$nodes_pat
-exec >$objdir/nodes.c.tmp
-
-echo "/*"
-echo " * This file was generated by mknodes.sh"
-echo " */"
-echo
-
-while IFS=; read -r line; do
-	IFS=' 	'
-	set -- $line
-	IFS=
-	case "$1" in
-	'%SIZES' )
-		echo "static const short nodesize[$tagno] = {"
-		IFS=' '
-		for struct in $struct_define; do
-			echo "      SHELL_ALIGN(sizeof (struct $struct)),"
-		done
-		echo "};"
-		;;
-	'%CALCSIZE' )
-		echo "      if (n == NULL)"
-		echo "	    return;"
-		echo "      funcblocksize += nodesize[n->type];"
-		echo "      switch (n->type) {"
-		IFS=' '
-		for struct in $struct_list; do
-			eval defines=\"\$define_$struct\"
-			for define in $defines; do
-				echo "      case $define:"
-			done
-			eval field=\$numfld_$struct
-			while
-				[ $field != 0 ]
-			do
-				eval line=\"\$field_${struct}_$field\"
-				field=$(($field - 1))
-				IFS=' '
-				set -- $line
-				name=$1
-				cl=")"
-				case $2 in
-				nodeptr ) fn=calcsize;;
-				nodelist ) fn=sizenodelist;;
-				string ) fn="funcstringsize += strlen"
-					cl=") + 1";;
-				* ) continue;;
-				esac
-				echo "	    ${fn}(n->$struct.$name${cl};"
-			done
-			echo "	    break;"
-		done
-		echo "      };"
-		;;
-	'%COPY' )
-		echo "      if (n == NULL)"
-		echo "	    return NULL;"
-		echo "      new = funcblock;"
-		echo "      funcblock = (char *) funcblock + nodesize[n->type];"
-		echo "      switch (n->type) {"
-		IFS=' '
-		for struct in $struct_list; do
-			eval defines=\"\$define_$struct\"
-			for define in $defines; do
-				echo "      case $define:"
-			done
-			eval field=\$numfld_$struct
-			while
-				[ $field != 0 ]
-			do
-				eval line=\"\$field_${struct}_$field\"
-				field=$(($field - 1))
-				IFS=' '
-				set -- $line
-				name=$1
-				case $2 in
-				nodeptr ) fn="copynode(";;
-				nodelist ) fn="copynodelist(";;
-				string ) fn="nodesavestr(";;
-				int ) fn=;;
-				* ) continue;;
-				esac
-				f="$struct.$name"
-				echo "	    new->$f = ${fn}n->$f${fn:+)};"
-			done
-			echo "	    break;"
-		done
-		echo "      };"
-		echo "      new->type = n->type;"
-		;;
-	* ) echo "$line";;
-	esac
-done
-
-mv $objdir/nodes.c.tmp $objdir/nodes.c || exit 1
diff --git a/sh/mktokens b/sh/mktokens
deleted file mode 100644
index 25f2e6e..0000000
--- a/sh/mktokens
+++ /dev/null
@@ -1,92 +0,0 @@
-#!/bin/sh -
-#	$NetBSD: mktokens,v 1.10 2003/08/22 11:22:23 agc Exp $
-#
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)mktokens	8.1 (Berkeley) 5/31/93
-
-# The following is a list of tokens.  The second column is nonzero if the
-# token marks the end of a list.  The third column is the name to print in
-# error messages.
-
-cat > /tmp/ka$$ <<\!
-TEOF	1	end of file
-TNL	0	newline
-TSEMI	0	";"
-TBACKGND 0	"&"
-TAND	0	"&&"
-TOR	0	"||"
-TPIPE	0	"|"
-TLP	0	"("
-TRP	1	")"
-TENDCASE 1	";;"
-TENDBQUOTE 1	"`"
-TREDIR	0	redirection
-TWORD	0	word
-TIF	0	"if"
-TTHEN	1	"then"
-TELSE	1	"else"
-TELIF	1	"elif"
-TFI	1	"fi"
-TWHILE	0	"while"
-TUNTIL	0	"until"
-TFOR	0	"for"
-TDO	1	"do"
-TDONE	1	"done"
-TBEGIN	0	"{"
-TEND	1	"}"
-TCASE	0	"case"
-TESAC	1	"esac"
-TNOT	0	"!"
-!
-nl=`wc -l /tmp/ka$$`
-exec > token.h
-awk '{print "#define " $1 " " NR-1}' /tmp/ka$$
-echo '
-/* Array indicating which tokens mark the end of a list */
-const char tokendlist[] = {'
-awk '{print "\t" $2 ","}' /tmp/ka$$
-echo '};
-
-const char *const tokname[] = {'
-sed -e 's/"/\\"/g' \
-    -e 's/[^	 ]*[	 ][	 ]*[^	 ]*[	 ][	 ]*\(.*\)/	"\1",/' \
-    /tmp/ka$$
-echo '};
-'
-sed 's/"//g' /tmp/ka$$ | awk '
-/TIF/{print "#define KWDOFFSET " NR-1; print ""; 
-      print "const char *const parsekwd[] = {"}
-/TIF/,/neverfound/{print "	\"" $3 "\","}'
-echo '	0
-};'
-
-rm /tmp/ka$$
diff --git a/sh/myhistedit.h b/sh/myhistedit.h
deleted file mode 100644
index 603a27b..0000000
--- a/sh/myhistedit.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*	$NetBSD: myhistedit.h,v 1.10 2003/08/07 09:05:35 agc Exp $	*/
-
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)myhistedit.h	8.2 (Berkeley) 5/4/95
- */
-
-#ifdef WITH_HISTORY
-#include <histedit.h>
-
-extern History *hist;
-extern EditLine *el;
-extern int displayhist;
-
-void histedit(void);
-void sethistsize(const char *);
-void setterm(const char *);
-int histcmd(int, char **);
-int inputrc(int, char **);
-int not_fcnumber(char *);
-int str_to_event(const char *, int);
-#endif
-
diff --git a/sh/mystring.c b/sh/mystring.c
deleted file mode 100644
index aecf83e..0000000
--- a/sh/mystring.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*	$NetBSD: mystring.c,v 1.16 2003/08/07 09:05:35 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)mystring.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: mystring.c,v 1.16 2003/08/07 09:05:35 agc Exp $");
-#endif
-#endif /* not lint */
-
-/*
- * String functions.
- *
- *	equal(s1, s2)		Return true if strings are equal.
- *	scopy(from, to)		Copy a string.
- *	scopyn(from, to, n)	Like scopy, but checks for overflow.
- *	number(s)		Convert a string of digits to an integer.
- *	is_number(s)		Return true if s is a string of digits.
- */
-
-#include <stdlib.h>
-#include "shell.h"
-#include "syntax.h"
-#include "error.h"
-#include "mystring.h"
-
-
-char nullstr[1];		/* zero length string */
-
-/*
- * equal - #defined in mystring.h
- */
-
-/*
- * scopy - #defined in mystring.h
- */
-
-
-/*
- * scopyn - copy a string from "from" to "to", truncating the string
- *		if necessary.  "To" is always nul terminated, even if
- *		truncation is performed.  "Size" is the size of "to".
- */
-
-void
-scopyn(const char *from, char *to, int size)
-{
-
-	while (--size > 0) {
-		if ((*to++ = *from++) == '\0')
-			return;
-	}
-	*to = '\0';
-}
-
-
-/*
- * prefix -- see if pfx is a prefix of string.
- */
-
-int
-prefix(const char *pfx, const char *string)
-{
-	while (*pfx) {
-		if (*pfx++ != *string++)
-			return 0;
-	}
-	return 1;
-}
-
-
-/*
- * Convert a string of digits to an integer, printing an error message on
- * failure.
- */
-
-int
-number(const char *s)
-{
-
-	if (! is_number(s))
-		error("Illegal number: %s", s);
-	return atoi(s);
-}
-
-
-
-/*
- * Check for a valid number.  This should be elsewhere.
- */
-
-int
-is_number(const char *p)
-{
-	do {
-		if (! is_digit(*p))
-			return 0;
-	} while (*++p != '\0');
-	return 1;
-}
diff --git a/sh/mystring.h b/sh/mystring.h
deleted file mode 100644
index 08a73e9..0000000
--- a/sh/mystring.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*	$NetBSD: mystring.h,v 1.11 2003/08/07 09:05:35 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)mystring.h	8.2 (Berkeley) 5/4/95
- */
-
-#include <string.h>
-
-void scopyn(const char *, char *, int);
-int prefix(const char *, const char *);
-int number(const char *);
-int is_number(const char *);
-
-#define equal(s1, s2)	(strcmp(s1, s2) == 0)
-#define scopy(s1, s2)	((void)strcpy(s2, s1))
diff --git a/sh/nodes.c b/sh/nodes.c
deleted file mode 100644
index 8a2c718..0000000
--- a/sh/nodes.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/*
- * This file was generated by mknodes.sh
- */
-
-/*	$NetBSD: nodes.c.pat,v 1.12 2004/06/15 22:57:27 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)nodes.c.pat	8.2 (Berkeley) 5/4/95
- */
-
-#include <stdlib.h>
-/*
- * Routine for dealing with parsed shell commands.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "memalloc.h"
-#include "machdep.h"
-#include "mystring.h"
-
-
-int     funcblocksize;		/* size of structures in function */
-int     funcstringsize;		/* size of strings in node */
-pointer funcblock;		/* block to allocate function from */
-char   *funcstring;		/* block to allocate strings from */
-
-static const short nodesize[26] = {
-      SHELL_ALIGN(sizeof (struct nbinary)),
-      SHELL_ALIGN(sizeof (struct ncmd)),
-      SHELL_ALIGN(sizeof (struct npipe)),
-      SHELL_ALIGN(sizeof (struct nredir)),
-      SHELL_ALIGN(sizeof (struct nredir)),
-      SHELL_ALIGN(sizeof (struct nredir)),
-      SHELL_ALIGN(sizeof (struct nbinary)),
-      SHELL_ALIGN(sizeof (struct nbinary)),
-      SHELL_ALIGN(sizeof (struct nif)),
-      SHELL_ALIGN(sizeof (struct nbinary)),
-      SHELL_ALIGN(sizeof (struct nbinary)),
-      SHELL_ALIGN(sizeof (struct nfor)),
-      SHELL_ALIGN(sizeof (struct ncase)),
-      SHELL_ALIGN(sizeof (struct nclist)),
-      SHELL_ALIGN(sizeof (struct narg)),
-      SHELL_ALIGN(sizeof (struct narg)),
-      SHELL_ALIGN(sizeof (struct nfile)),
-      SHELL_ALIGN(sizeof (struct nfile)),
-      SHELL_ALIGN(sizeof (struct nfile)),
-      SHELL_ALIGN(sizeof (struct nfile)),
-      SHELL_ALIGN(sizeof (struct nfile)),
-      SHELL_ALIGN(sizeof (struct ndup)),
-      SHELL_ALIGN(sizeof (struct ndup)),
-      SHELL_ALIGN(sizeof (struct nhere)),
-      SHELL_ALIGN(sizeof (struct nhere)),
-      SHELL_ALIGN(sizeof (struct nnot)),
-};
-
-
-STATIC void calcsize(union node *);
-STATIC void sizenodelist(struct nodelist *);
-STATIC union node *copynode(union node *);
-STATIC struct nodelist *copynodelist(struct nodelist *);
-STATIC char *nodesavestr(char *);
-
-
-
-/*
- * Make a copy of a parse tree.
- */
-
-union node *
-copyfunc(n)
-	union node *n;
-{
-	if (n == NULL)
-		return NULL;
-	funcblocksize = 0;
-	funcstringsize = 0;
-	calcsize(n);
-	funcblock = ckmalloc(funcblocksize + funcstringsize);
-	funcstring = (char *) funcblock + funcblocksize;
-	return copynode(n);
-}
-
-
-
-STATIC void
-calcsize(n)
-	union node *n;
-{
-      if (n == NULL)
-	    return;
-      funcblocksize += nodesize[n->type];
-      switch (n->type) {
-      case NSEMI:
-      case NAND:
-      case NOR:
-      case NWHILE:
-      case NUNTIL:
-	    calcsize(n->nbinary.ch2);
-	    calcsize(n->nbinary.ch1);
-	    break;
-      case NCMD:
-	    calcsize(n->ncmd.redirect);
-	    calcsize(n->ncmd.args);
-	    break;
-      case NPIPE:
-	    sizenodelist(n->npipe.cmdlist);
-	    break;
-      case NREDIR:
-      case NBACKGND:
-      case NSUBSHELL:
-	    calcsize(n->nredir.redirect);
-	    calcsize(n->nredir.n);
-	    break;
-      case NIF:
-	    calcsize(n->nif.elsepart);
-	    calcsize(n->nif.ifpart);
-	    calcsize(n->nif.test);
-	    break;
-      case NFOR:
-	    funcstringsize += strlen(n->nfor.var) + 1;
-	    calcsize(n->nfor.body);
-	    calcsize(n->nfor.args);
-	    break;
-      case NCASE:
-	    calcsize(n->ncase.cases);
-	    calcsize(n->ncase.expr);
-	    break;
-      case NCLIST:
-	    calcsize(n->nclist.body);
-	    calcsize(n->nclist.pattern);
-	    calcsize(n->nclist.next);
-	    break;
-      case NDEFUN:
-      case NARG:
-	    sizenodelist(n->narg.backquote);
-	    funcstringsize += strlen(n->narg.text) + 1;
-	    calcsize(n->narg.next);
-	    break;
-      case NTO:
-      case NCLOBBER:
-      case NFROM:
-      case NFROMTO:
-      case NAPPEND:
-	    calcsize(n->nfile.fname);
-	    calcsize(n->nfile.next);
-	    break;
-      case NTOFD:
-      case NFROMFD:
-	    calcsize(n->ndup.vname);
-	    calcsize(n->ndup.next);
-	    break;
-      case NHERE:
-      case NXHERE:
-	    calcsize(n->nhere.doc);
-	    calcsize(n->nhere.next);
-	    break;
-      case NNOT:
-	    calcsize(n->nnot.com);
-	    break;
-      };
-}
-
-
-
-STATIC void
-sizenodelist(lp)
-	struct nodelist *lp;
-{
-	while (lp) {
-		funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
-		calcsize(lp->n);
-		lp = lp->next;
-	}
-}
-
-
-
-STATIC union node *
-copynode(n)
-	union node *n;
-{
-	union node *new;
-
-      if (n == NULL)
-	    return NULL;
-      new = funcblock;
-      funcblock = (char *) funcblock + nodesize[n->type];
-      switch (n->type) {
-      case NSEMI:
-      case NAND:
-      case NOR:
-      case NWHILE:
-      case NUNTIL:
-	    new->nbinary.ch2 = copynode(n->nbinary.ch2);
-	    new->nbinary.ch1 = copynode(n->nbinary.ch1);
-	    break;
-      case NCMD:
-	    new->ncmd.redirect = copynode(n->ncmd.redirect);
-	    new->ncmd.args = copynode(n->ncmd.args);
-	    new->ncmd.backgnd = n->ncmd.backgnd;
-	    break;
-      case NPIPE:
-	    new->npipe.cmdlist = copynodelist(n->npipe.cmdlist);
-	    new->npipe.backgnd = n->npipe.backgnd;
-	    break;
-      case NREDIR:
-      case NBACKGND:
-      case NSUBSHELL:
-	    new->nredir.redirect = copynode(n->nredir.redirect);
-	    new->nredir.n = copynode(n->nredir.n);
-	    break;
-      case NIF:
-	    new->nif.elsepart = copynode(n->nif.elsepart);
-	    new->nif.ifpart = copynode(n->nif.ifpart);
-	    new->nif.test = copynode(n->nif.test);
-	    break;
-      case NFOR:
-	    new->nfor.var = nodesavestr(n->nfor.var);
-	    new->nfor.body = copynode(n->nfor.body);
-	    new->nfor.args = copynode(n->nfor.args);
-	    break;
-      case NCASE:
-	    new->ncase.cases = copynode(n->ncase.cases);
-	    new->ncase.expr = copynode(n->ncase.expr);
-	    break;
-      case NCLIST:
-	    new->nclist.body = copynode(n->nclist.body);
-	    new->nclist.pattern = copynode(n->nclist.pattern);
-	    new->nclist.next = copynode(n->nclist.next);
-	    break;
-      case NDEFUN:
-      case NARG:
-	    new->narg.backquote = copynodelist(n->narg.backquote);
-	    new->narg.text = nodesavestr(n->narg.text);
-	    new->narg.next = copynode(n->narg.next);
-	    break;
-      case NTO:
-      case NCLOBBER:
-      case NFROM:
-      case NFROMTO:
-      case NAPPEND:
-	    new->nfile.fname = copynode(n->nfile.fname);
-	    new->nfile.fd = n->nfile.fd;
-	    new->nfile.next = copynode(n->nfile.next);
-	    break;
-      case NTOFD:
-      case NFROMFD:
-	    new->ndup.vname = copynode(n->ndup.vname);
-	    new->ndup.dupfd = n->ndup.dupfd;
-	    new->ndup.fd = n->ndup.fd;
-	    new->ndup.next = copynode(n->ndup.next);
-	    break;
-      case NHERE:
-      case NXHERE:
-	    new->nhere.doc = copynode(n->nhere.doc);
-	    new->nhere.fd = n->nhere.fd;
-	    new->nhere.next = copynode(n->nhere.next);
-	    break;
-      case NNOT:
-	    new->nnot.com = copynode(n->nnot.com);
-	    break;
-      };
-      new->type = n->type;
-	return new;
-}
-
-
-STATIC struct nodelist *
-copynodelist(lp)
-	struct nodelist *lp;
-{
-	struct nodelist *start;
-	struct nodelist **lpp;
-
-	lpp = &start;
-	while (lp) {
-		*lpp = funcblock;
-		funcblock = (char *) funcblock +
-		    SHELL_ALIGN(sizeof(struct nodelist));
-		(*lpp)->n = copynode(lp->n);
-		lp = lp->next;
-		lpp = &(*lpp)->next;
-	}
-	*lpp = NULL;
-	return start;
-}
-
-
-
-STATIC char *
-nodesavestr(s)
-	char   *s;
-{
-	register char *p = s;
-	register char *q = funcstring;
-	char   *rtn = funcstring;
-
-	while ((*q++ = *p++) != 0)
-		continue;
-	funcstring = q;
-	return rtn;
-}
-
-
-
-/*
- * Free a parse tree.
- */
-
-void
-freefunc(n)
-	union node *n;
-{
-	if (n)
-		ckfree(n);
-}
diff --git a/sh/nodes.c.pat b/sh/nodes.c.pat
deleted file mode 100644
index e619a01..0000000
--- a/sh/nodes.c.pat
+++ /dev/null
@@ -1,166 +0,0 @@
-/*	$NetBSD: nodes.c.pat,v 1.12 2004/06/15 22:57:27 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)nodes.c.pat	8.2 (Berkeley) 5/4/95
- */
-
-#include <stdlib.h>
-/*
- * Routine for dealing with parsed shell commands.
- */
-
-#include "shell.h"
-#include "nodes.h"
-#include "memalloc.h"
-#include "machdep.h"
-#include "mystring.h"
-
-
-int     funcblocksize;		/* size of structures in function */
-int     funcstringsize;		/* size of strings in node */
-pointer funcblock;		/* block to allocate function from */
-char   *funcstring;		/* block to allocate strings from */
-
-%SIZES
-
-
-STATIC void calcsize(union node *);
-STATIC void sizenodelist(struct nodelist *);
-STATIC union node *copynode(union node *);
-STATIC struct nodelist *copynodelist(struct nodelist *);
-STATIC char *nodesavestr(char *);
-
-
-
-/*
- * Make a copy of a parse tree.
- */
-
-union node *
-copyfunc(n)
-	union node *n;
-{
-	if (n == NULL)
-		return NULL;
-	funcblocksize = 0;
-	funcstringsize = 0;
-	calcsize(n);
-	funcblock = ckmalloc(funcblocksize + funcstringsize);
-	funcstring = (char *) funcblock + funcblocksize;
-	return copynode(n);
-}
-
-
-
-STATIC void
-calcsize(n)
-	union node *n;
-{
-	%CALCSIZE
-}
-
-
-
-STATIC void
-sizenodelist(lp)
-	struct nodelist *lp;
-{
-	while (lp) {
-		funcblocksize += SHELL_ALIGN(sizeof(struct nodelist));
-		calcsize(lp->n);
-		lp = lp->next;
-	}
-}
-
-
-
-STATIC union node *
-copynode(n)
-	union node *n;
-{
-	union node *new;
-
-	%COPY
-	return new;
-}
-
-
-STATIC struct nodelist *
-copynodelist(lp)
-	struct nodelist *lp;
-{
-	struct nodelist *start;
-	struct nodelist **lpp;
-
-	lpp = &start;
-	while (lp) {
-		*lpp = funcblock;
-		funcblock = (char *) funcblock +
-		    SHELL_ALIGN(sizeof(struct nodelist));
-		(*lpp)->n = copynode(lp->n);
-		lp = lp->next;
-		lpp = &(*lpp)->next;
-	}
-	*lpp = NULL;
-	return start;
-}
-
-
-
-STATIC char *
-nodesavestr(s)
-	char   *s;
-{
-	register char *p = s;
-	register char *q = funcstring;
-	char   *rtn = funcstring;
-
-	while ((*q++ = *p++) != 0)
-		continue;
-	funcstring = q;
-	return rtn;
-}
-
-
-
-/*
- * Free a parse tree.
- */
-
-void
-freefunc(n)
-	union node *n;
-{
-	if (n)
-		ckfree(n);
-}
diff --git a/sh/nodes.h b/sh/nodes.h
deleted file mode 100644
index aa750ed..0000000
--- a/sh/nodes.h
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * This file was generated by mknodes.sh
- */
-
-#define NSEMI 0
-#define NCMD 1
-#define NPIPE 2
-#define NREDIR 3
-#define NBACKGND 4
-#define NSUBSHELL 5
-#define NAND 6
-#define NOR 7
-#define NIF 8
-#define NWHILE 9
-#define NUNTIL 10
-#define NFOR 11
-#define NCASE 12
-#define NCLIST 13
-#define NDEFUN 14
-#define NARG 15
-#define NTO 16
-#define NCLOBBER 17
-#define NFROM 18
-#define NFROMTO 19
-#define NAPPEND 20
-#define NTOFD 21
-#define NFROMFD 22
-#define NHERE 23
-#define NXHERE 24
-#define NNOT 25
-
-
-
-struct nbinary {
-      int type;
-      union node *ch1;
-      union node *ch2;
-};
-
-
-struct ncmd {
-      int type;
-      int backgnd;
-      union node *args;
-      union node *redirect;
-};
-
-
-struct npipe {
-      int type;
-      int backgnd;
-      struct nodelist *cmdlist;
-};
-
-
-struct nredir {
-      int type;
-      union node *n;
-      union node *redirect;
-};
-
-
-struct nif {
-      int type;
-      union node *test;
-      union node *ifpart;
-      union node *elsepart;
-};
-
-
-struct nfor {
-      int type;
-      union node *args;
-      union node *body;
-      char *var;
-};
-
-
-struct ncase {
-      int type;
-      union node *expr;
-      union node *cases;
-};
-
-
-struct nclist {
-      int type;
-      union node *next;
-      union node *pattern;
-      union node *body;
-};
-
-
-struct narg {
-      int type;
-      union node *next;
-      char *text;
-      struct nodelist *backquote;
-};
-
-
-struct nfile {
-      int type;
-      union node *next;
-      int fd;
-      union node *fname;
-      char *expfname;
-};
-
-
-struct ndup {
-      int type;
-      union node *next;
-      int fd;
-      int dupfd;
-      union node *vname;
-};
-
-
-struct nhere {
-      int type;
-      union node *next;
-      int fd;
-      union node *doc;
-};
-
-
-struct nnot {
-      int type;
-      union node *com;
-};
-
-
-union node {
-      int type;
-      struct nbinary nbinary;
-      struct ncmd ncmd;
-      struct npipe npipe;
-      struct nredir nredir;
-      struct nif nif;
-      struct nfor nfor;
-      struct ncase ncase;
-      struct nclist nclist;
-      struct narg narg;
-      struct nfile nfile;
-      struct ndup ndup;
-      struct nhere nhere;
-      struct nnot nnot;
-};
-
-
-struct nodelist {
-	struct nodelist *next;
-	union node *n;
-};
-
-
-union node *copyfunc(union node *);
-void freefunc(union node *);
diff --git a/sh/nodetypes b/sh/nodetypes
deleted file mode 100644
index 4adebc0..0000000
--- a/sh/nodetypes
+++ /dev/null
@@ -1,143 +0,0 @@
-#	$NetBSD: nodetypes,v 1.12 2003/08/22 11:22:23 agc Exp $
-# Copyright (c) 1991, 1993
-#	The Regents of the University of California.  All rights reserved.
-#
-# This code is derived from software contributed to Berkeley by
-# Kenneth Almquist.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-# 1. Redistributions of source code must retain the above copyright
-#    notice, this list of conditions and the following disclaimer.
-# 2. Redistributions in binary form must reproduce the above copyright
-#    notice, this list of conditions and the following disclaimer in the
-#    documentation and/or other materials provided with the distribution.
-# 3. Neither the name of the University nor the names of its contributors
-#    may be used to endorse or promote products derived from this software
-#    without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-# SUCH DAMAGE.
-#
-#	@(#)nodetypes	8.2 (Berkeley) 5/4/95
-
-# This file describes the nodes used in parse trees.  Unindented lines
-# contain a node type followed by a structure tag.  Subsequent indented
-# lines specify the fields of the structure.  Several node types can share
-# the same structure, in which case the fields of the structure should be
-# specified only once.
-#
-# A field of a structure is described by the name of the field followed
-# by a type.  The currently implemented types are:
-#	nodeptr - a pointer to a node
-#	nodelist - a pointer to a list of nodes
-#	string - a pointer to a nul terminated string
-#	int - an integer
-#	other - any type that can be copied by assignment
-#	temp - a field that doesn't have to be copied when the node is copied
-# The last two types should be followed by the text of a C declaration for
-# the field.
-
-NSEMI nbinary			# two commands separated by a semicolon
-	type	  int
-	ch1	  nodeptr		# the first child
-	ch2	  nodeptr		# the second child
-
-NCMD ncmd			# a simple command
-	type	  int
-	backgnd	  int			# set to run command in background
-	args	  nodeptr		# the arguments
-	redirect  nodeptr		# list of file redirections
-
-NPIPE npipe			# a pipeline
-	type	  int
-	backgnd	  int			# set to run pipeline in background
-	cmdlist	  nodelist		# the commands in the pipeline
-
-NREDIR nredir			# redirection (of a complex command)
-	type	  int
-	n	  nodeptr		# the command
-	redirect  nodeptr		# list of file redirections
-
-NBACKGND nredir			# run command in background
-NSUBSHELL nredir		# run command in a subshell
-
-NAND nbinary			# the && operator
-NOR nbinary			# the || operator
-
-NIF nif				# the if statement.  Elif clauses are handled
-	type	  int		    # using multiple if nodes.
-	test	  nodeptr		# if test
-	ifpart	  nodeptr		# then ifpart
-	elsepart  nodeptr		# else elsepart
-
-NWHILE nbinary			# the while statement.  First child is the test
-NUNTIL nbinary			# the until statement
-
-NFOR nfor			# the for statement
-	type	  int
-	args	  nodeptr		# for var in args
-	body	  nodeptr		# do body; done
-	var	  string		# the for variable
-
-NCASE ncase			# a case statement
-	type	  int
-	expr	  nodeptr		# the word to switch on
-	cases	  nodeptr		# the list of cases (NCLIST nodes)
-
-NCLIST nclist			# a case
-	type	  int
-	next	  nodeptr		# the next case in list
-	pattern	  nodeptr		# list of patterns for this case
-	body	  nodeptr		# code to execute for this case
-
-
-NDEFUN narg			# define a function.  The "next" field contains
-				# the body of the function.
-
-NARG narg			# represents a word
-	type	  int
-	next	  nodeptr		# next word in list
-	text	  string		# the text of the word
-	backquote nodelist		# list of commands in back quotes
-
-NTO nfile			# fd> fname
-NCLOBBER nfile			# fd>| fname
-NFROM nfile			# fd< fname
-NFROMTO nfile			# fd<> fname
-NAPPEND nfile			# fd>> fname
-	type	  int
-	next	  nodeptr		# next redirection in list
-	fd	  int			# file descriptor being redirected
-	fname	  nodeptr		# file name, in a NARG node
-	expfname  temp	char *expfname	# actual file name
-
-NTOFD ndup			# fd<&dupfd
-NFROMFD ndup			# fd>&dupfd
-	type	  int
-	next	  nodeptr		# next redirection in list
-	fd	  int			# file descriptor being redirected
-	dupfd	  int			# file descriptor to duplicate
-	vname	  nodeptr		# file name if fd>&$var
-
-
-NHERE nhere			# fd<<\!
-NXHERE nhere			# fd<<!
-	type	  int
-	next	  nodeptr		# next redirection in list
-	fd	  int			# file descriptor being redirected
-	doc	  nodeptr		# input to command (NARG node)
-
-NNOT nnot			# ! command  (actually pipeline)
-	type	int
-	com	nodeptr
diff --git a/sh/options.c b/sh/options.c
deleted file mode 100644
index bc833c7..0000000
--- a/sh/options.c
+++ /dev/null
@@ -1,530 +0,0 @@
-/*	$NetBSD: options.c,v 1.37 2004/10/30 19:29:27 christos Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)options.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: options.c,v 1.37 2004/10/30 19:29:27 christos Exp $");
-#endif
-#endif /* not lint */
-
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#define DEFINE_OPTIONS
-#include "options.h"
-#undef DEFINE_OPTIONS
-#include "nodes.h"	/* for other header files */
-#include "eval.h"
-#include "jobs.h"
-#include "input.h"
-#include "output.h"
-#include "trap.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-#include "show.h"
-
-char *arg0;			/* value of $0 */
-struct shparam shellparam;	/* current positional parameters */
-char **argptr;			/* argument list for builtin commands */
-char *optionarg;		/* set by nextopt (like getopt) */
-char *optptr;			/* used by nextopt */
-
-char *minusc;			/* argument to -c option */
-
-
-STATIC void options(int);
-STATIC void minus_o(char *, int);
-STATIC void setoption(int, int);
-STATIC int getopts(char *, char *, char **, char ***, char **);
-
-
-/*
- * Process the shell command line arguments.
- */
-
-void
-procargs(int argc, char **argv)
-{
-	int i;
-
-	argptr = argv;
-	if (argc > 0)
-		argptr++;
-	for (i = 0; i < NOPTS; i++)
-		optlist[i].val = 2;
-	options(1);
-	if (*argptr == NULL && minusc == NULL)
-		sflag = 1;
-	if (iflag == 2 && sflag == 1 && isatty(0) && isatty(1))
-		iflag = 1;
-	if (mflag == 2)
-		mflag = iflag;
-	for (i = 0; i < NOPTS; i++)
-		if (optlist[i].val == 2)
-			optlist[i].val = 0;
-#if DEBUG == 2
-	debug = 1;
-#endif
-	arg0 = argv[0];
-	if (sflag == 0 && minusc == NULL) {
-		commandname = argv[0];
-		arg0 = *argptr++;
-		setinputfile(arg0, 0);
-		commandname = arg0;
-	}
-	/* POSIX 1003.2: first arg after -c cmd is $0, remainder $1... */
-	if (minusc != NULL) {
-		if (argptr == NULL || *argptr == NULL)
-			error("Bad -c option");
-		minusc = *argptr++;
-		if (*argptr != 0)
-			arg0 = *argptr++;
-	}
-
-	shellparam.p = argptr;
-	shellparam.reset = 1;
-	/* assert(shellparam.malloc == 0 && shellparam.nparam == 0); */
-	while (*argptr) {
-		shellparam.nparam++;
-		argptr++;
-	}
-	optschanged();
-}
-
-
-void
-optschanged(void)
-{
-	setinteractive(iflag);
-#ifdef WITH_HISTORY
-	histedit();
-#endif
-	setjobctl(mflag);
-}
-
-/*
- * Process shell options.  The global variable argptr contains a pointer
- * to the argument list; we advance it past the options.
- */
-
-STATIC void
-options(int cmdline)
-{
-	static char empty[] = "";
-	char *p;
-	int val;
-	int c;
-
-	if (cmdline)
-		minusc = NULL;
-	while ((p = *argptr) != NULL) {
-		argptr++;
-		if ((c = *p++) == '-') {
-			val = 1;
-                        if (p[0] == '\0' || (p[0] == '-' && p[1] == '\0')) {
-                                if (!cmdline) {
-                                        /* "-" means turn off -x and -v */
-                                        if (p[0] == '\0')
-                                                xflag = vflag = 0;
-                                        /* "--" means reset params */
-                                        else if (*argptr == NULL)
-						setparam(argptr);
-                                }
-				break;	  /* "-" or  "--" terminates options */
-			}
-		} else if (c == '+') {
-			val = 0;
-		} else {
-			argptr--;
-			break;
-		}
-		while ((c = *p++) != '\0') {
-			if (c == 'c' && cmdline) {
-				/* command is after shell args*/
-				minusc = empty;
-			} else if (c == 'o') {
-				minus_o(*argptr, val);
-				if (*argptr)
-					argptr++;
-			} else {
-				setoption(c, val);
-			}
-		}
-	}
-}
-
-static void
-set_opt_val(int i, int val)
-{
-	int j;
-	int flag;
-
-	if (val && (flag = optlist[i].opt_set)) {
-		/* some options (eg vi/emacs) are mutually exclusive */
-		for (j = 0; j < NOPTS; j++)
-		    if (optlist[j].opt_set == flag)
-			optlist[j].val = 0;
-	}
-	optlist[i].val = val;
-#ifdef DEBUG
-	if (&optlist[i].val == &debug)
-		opentrace();
-#endif
-}
-
-STATIC void
-minus_o(char *name, int val)
-{
-	int i;
-
-	if (name == NULL) {
-		out1str("Current option settings\n");
-		for (i = 0; i < NOPTS; i++)
-			out1fmt("%-16s%s\n", optlist[i].name,
-				optlist[i].val ? "on" : "off");
-	} else {
-		for (i = 0; i < NOPTS; i++)
-			if (equal(name, optlist[i].name)) {
-				set_opt_val(i, val);
-				return;
-			}
-		error("Illegal option -o %s", name);
-	}
-}
-
-
-STATIC void
-setoption(int flag, int val)
-{
-	int i;
-
-	for (i = 0; i < NOPTS; i++)
-		if (optlist[i].letter == flag) {
-			set_opt_val( i, val );
-			return;
-		}
-	error("Illegal option -%c", flag);
-	/* NOTREACHED */
-}
-
-
-
-#ifdef mkinit
-INCLUDE "options.h"
-
-SHELLPROC {
-	int i;
-
-	for (i = 0; optlist[i].name; i++)
-		optlist[i].val = 0;
-	optschanged();
-
-}
-#endif
-
-
-/*
- * Set the shell parameters.
- */
-
-void
-setparam(char **argv)
-{
-	char **newparam;
-	char **ap;
-	int nparam;
-
-	for (nparam = 0 ; argv[nparam] ; nparam++);
-	ap = newparam = ckmalloc((nparam + 1) * sizeof *ap);
-	while (*argv) {
-		*ap++ = savestr(*argv++);
-	}
-	*ap = NULL;
-	freeparam(&shellparam);
-	shellparam.malloc = 1;
-	shellparam.nparam = nparam;
-	shellparam.p = newparam;
-	shellparam.optnext = NULL;
-}
-
-
-/*
- * Free the list of positional parameters.
- */
-
-void
-freeparam(volatile struct shparam *param)
-{
-	char **ap;
-
-	if (param->malloc) {
-		for (ap = param->p ; *ap ; ap++)
-			ckfree(*ap);
-		ckfree(param->p);
-	}
-}
-
-
-
-/*
- * The shift builtin command.
- */
-
-int
-shiftcmd(int argc, char **argv)
-{
-	int n;
-	char **ap1, **ap2;
-
-	n = 1;
-	if (argc > 1)
-		n = number(argv[1]);
-	if (n > shellparam.nparam)
-		error("can't shift that many");
-	INTOFF;
-	shellparam.nparam -= n;
-	for (ap1 = shellparam.p ; --n >= 0 ; ap1++) {
-		if (shellparam.malloc)
-			ckfree(*ap1);
-	}
-	ap2 = shellparam.p;
-	while ((*ap2++ = *ap1++) != NULL);
-	shellparam.optnext = NULL;
-	INTON;
-	return 0;
-}
-
-
-
-/*
- * The set command builtin.
- */
-
-int
-setcmd(int argc, char **argv)
-{
-	if (argc == 1)
-		return showvars(0, 0, 1);
-	INTOFF;
-	options(0);
-	optschanged();
-	if (*argptr != NULL) {
-		setparam(argptr);
-	}
-	INTON;
-	return 0;
-}
-
-
-void
-getoptsreset(value)
-	const char *value;
-{
-	if (number(value) == 1) {
-		shellparam.optnext = NULL;
-		shellparam.reset = 1;
-	}
-}
-
-/*
- * The getopts builtin.  Shellparam.optnext points to the next argument
- * to be processed.  Shellparam.optptr points to the next character to
- * be processed in the current argument.  If shellparam.optnext is NULL,
- * then it's the first time getopts has been called.
- */
-
-int
-getoptscmd(int argc, char **argv)
-{
-	char **optbase;
-
-	if (argc < 3)
-		error("usage: getopts optstring var [arg]");
-	else if (argc == 3)
-		optbase = shellparam.p;
-	else
-		optbase = &argv[3];
-
-	if (shellparam.reset == 1) {
-		shellparam.optnext = optbase;
-		shellparam.optptr = NULL;
-		shellparam.reset = 0;
-	}
-
-	return getopts(argv[1], argv[2], optbase, &shellparam.optnext,
-		       &shellparam.optptr);
-}
-
-STATIC int
-getopts(char *optstr, char *optvar, char **optfirst, char ***optnext, char **optpptr)
-{
-	char *p, *q;
-	char c = '?';
-	int done = 0;
-	int ind = 0;
-	int err = 0;
-	char s[12];
-
-	if ((p = *optpptr) == NULL || *p == '\0') {
-		/* Current word is done, advance */
-		if (*optnext == NULL)
-			return 1;
-		p = **optnext;
-		if (p == NULL || *p != '-' || *++p == '\0') {
-atend:
-			ind = *optnext - optfirst + 1;
-			*optnext = NULL;
-			p = NULL;
-			done = 1;
-			goto out;
-		}
-		(*optnext)++;
-		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
-			goto atend;
-	}
-
-	c = *p++;
-	for (q = optstr; *q != c; ) {
-		if (*q == '\0') {
-			if (optstr[0] == ':') {
-				s[0] = c;
-				s[1] = '\0';
-				err |= setvarsafe("OPTARG", s, 0);
-			} else {
-				outfmt(&errout, "Illegal option -%c\n", c);
-				(void) unsetvar("OPTARG", 0);
-			}
-			c = '?';
-			goto bad;
-		}
-		if (*++q == ':')
-			q++;
-	}
-
-	if (*++q == ':') {
-		if (*p == '\0' && (p = **optnext) == NULL) {
-			if (optstr[0] == ':') {
-				s[0] = c;
-				s[1] = '\0';
-				err |= setvarsafe("OPTARG", s, 0);
-				c = ':';
-			} else {
-				outfmt(&errout, "No arg for -%c option\n", c);
-				(void) unsetvar("OPTARG", 0);
-				c = '?';
-			}
-			goto bad;
-		}
-
-		if (p == **optnext)
-			(*optnext)++;
-		err |= setvarsafe("OPTARG", p, 0);
-		p = NULL;
-	} else
-		err |= setvarsafe("OPTARG", "", 0);
-	ind = *optnext - optfirst + 1;
-	goto out;
-
-bad:
-	ind = 1;
-	*optnext = NULL;
-	p = NULL;
-out:
-	*optpptr = p;
-	fmtstr(s, sizeof(s), "%d", ind);
-	err |= setvarsafe("OPTIND", s, VNOFUNC);
-	s[0] = c;
-	s[1] = '\0';
-	err |= setvarsafe(optvar, s, 0);
-	if (err) {
-		*optnext = NULL;
-		*optpptr = NULL;
-		flushall();
-		exraise(EXERROR);
-	}
-	return done;
-}
-
-/*
- * XXX - should get rid of.  have all builtins use getopt(3).  the
- * library getopt must have the BSD extension static variable "optreset"
- * otherwise it can't be used within the shell safely.
- *
- * Standard option processing (a la getopt) for builtin routines.  The
- * only argument that is passed to nextopt is the option string; the
- * other arguments are unnecessary.  It return the character, or '\0' on
- * end of input.
- */
-
-int
-nextopt(const char *optstring)
-{
-	char *p;
-	const char *q;
-	char c;
-
-	if ((p = optptr) == NULL || *p == '\0') {
-		p = *argptr;
-		if (p == NULL || *p != '-' || *++p == '\0')
-			return '\0';
-		argptr++;
-		if (p[0] == '-' && p[1] == '\0')	/* check for "--" */
-			return '\0';
-	}
-	c = *p++;
-	for (q = optstring ; *q != c ; ) {
-		if (*q == '\0')
-			error("Illegal option -%c", c);
-		if (*++q == ':')
-			q++;
-	}
-	if (*++q == ':') {
-		if (*p == '\0' && (p = *argptr++) == NULL)
-			error("No arg for -%c option", c);
-		optionarg = p;
-		p = NULL;
-	}
-	optptr = p;
-	return c;
-}
diff --git a/sh/options.h b/sh/options.h
deleted file mode 100644
index 4cc7dbe..0000000
--- a/sh/options.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/*	$NetBSD: options.h,v 1.17 2003/08/07 09:05:36 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)options.h	8.2 (Berkeley) 5/4/95
- */
-
-struct shparam {
-	int nparam;		/* # of positional parameters (without $0) */
-	unsigned char malloc;	/* if parameter list dynamically allocated */
-	unsigned char reset;	/* if getopts has been reset */
-	char **p;		/* parameter list */
-	char **optnext;		/* next parameter to be processed by getopts */
-	char *optptr;		/* used by getopts */
-};
-
-
-struct optent {
-	const char *name;		/* for set -o <name> */
-	const char letter;		/* set [+/-]<letter> and $- */
-	const char opt_set;		/* mutually exclusive option set */
-	char val;			/* value of <letter>flag */
-};
-
-/* Those marked [U] are required by posix, but have no effect! */
-
-#ifdef DEFINE_OPTIONS
-#define DEF_OPTS(name, letter, opt_set) {name, letter, opt_set, 0},
-struct optent optlist[] = {
-#else
-#define DEF_OPTS(name, letter, opt_set)
-#endif
-#define DEF_OPT(name,letter) DEF_OPTS(name, letter, 0)
-
-DEF_OPT( "errexit",	'e' )	/* exit on error */
-#define eflag optlist[0].val
-DEF_OPT( "noglob",	'f' )	/* no pathname expansion */
-#define fflag optlist[1].val
-DEF_OPT( "ignoreeof",	'I' )	/* do not exit on EOF */
-#define Iflag optlist[2].val
-DEF_OPT( "interactive",'i' )	/* interactive shell */
-#define iflag optlist[3].val
-DEF_OPT( "monitor",	'm' )	/* job control */
-#define mflag optlist[4].val
-DEF_OPT( "noexec",	'n' )	/* [U] do not exec commands */
-#define nflag optlist[5].val
-DEF_OPT( "stdin",	's' )	/* read from stdin */
-#define sflag optlist[6].val
-DEF_OPT( "xtrace",	'x' )	/* trace after expansion */
-#define xflag optlist[7].val
-DEF_OPT( "verbose",	'v' )	/* trace read input */
-#define vflag optlist[8].val
-DEF_OPTS( "vi",		'V', 'V' )	/* vi style editing */
-#define Vflag optlist[9].val
-DEF_OPTS( "emacs",	'E', 'V' )	/* emacs style editing */
-#define	Eflag optlist[10].val
-DEF_OPT( "noclobber",	'C' )	/* do not overwrite files with > */
-#define	Cflag optlist[11].val
-DEF_OPT( "allexport",	'a' )	/* export all variables */
-#define	aflag optlist[12].val
-DEF_OPT( "notify",	'b' )	/* [U] report completion of background jobs */
-#define	bflag optlist[13].val
-DEF_OPT( "nounset",	'u' )	/* error expansion of unset variables */
-#define	uflag optlist[14].val
-DEF_OPT( "quietprofile", 'q' )
-#define	qflag optlist[15].val
-DEF_OPT( "nolog",	0 )	/* [U] no functon defs in command history */
-#define	nolog optlist[16].val
-DEF_OPT( "cdprint",	0 )	/* always print result of cd */
-#define	cdprint optlist[17].val
-#ifdef DEBUG
-DEF_OPT( "debug",	0 )	/* enable debug prints */
-#define	debug optlist[18].val
-#endif
-
-#ifdef DEFINE_OPTIONS
-	{ 0, 0, 0, 0 },
-};
-#define NOPTS (sizeof optlist / sizeof optlist[0] - 1)
-int sizeof_optlist = sizeof optlist;
-#else
-extern struct optent optlist[];
-extern int sizeof_optlist;
-#endif
-
-
-extern char *minusc;		/* argument to -c option */
-extern char *arg0;		/* $0 */
-extern struct shparam shellparam;  /* $@ */
-extern char **argptr;		/* argument list for builtin commands */
-extern char *optionarg;		/* set by nextopt */
-extern char *optptr;		/* used by nextopt */
-
-void procargs(int, char **);
-void optschanged(void);
-void setparam(char **);
-void freeparam(volatile struct shparam *);
-int shiftcmd(int, char **);
-int setcmd(int, char **);
-int getoptscmd(int, char **);
-int nextopt(const char *);
-void getoptsreset(const char *);
diff --git a/sh/output.c b/sh/output.c
deleted file mode 100644
index b0e669e..0000000
--- a/sh/output.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*	$NetBSD: output.c,v 1.28 2003/08/07 09:05:36 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)output.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: output.c,v 1.28 2003/08/07 09:05:36 agc Exp $");
-#endif
-#endif /* not lint */
-
-/*
- * Shell output routines.  We use our own output routines because:
- *	When a builtin command is interrupted we have to discard
- *		any pending output.
- *	When a builtin command appears in back quotes, we want to
- *		save the output of the command in a region obtained
- *		via malloc, rather than doing a fork and reading the
- *		output of the command via a pipe.
- *	Our output routines may be smaller than the stdio routines.
- */
-
-#include <sys/types.h>		/* quad_t */
-#include <sys/param.h>		/* BSD4_4 */
-#include <sys/ioctl.h>
-
-#include <stdio.h>	/* defines BUFSIZ */
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "syntax.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-
-
-#define OUTBUFSIZ BUFSIZ
-#define BLOCK_OUT -2		/* output to a fixed block of memory */
-#define MEM_OUT -3		/* output to dynamically allocated memory */
-#define OUTPUT_ERR 01		/* error occurred on output */
-
-
-struct output output = {NULL, 0, NULL, OUTBUFSIZ, 1, 0};
-struct output errout = {NULL, 0, NULL, 100, 2, 0};
-struct output memout = {NULL, 0, NULL, 0, MEM_OUT, 0};
-struct output *out1 = &output;
-struct output *out2 = &errout;
-
-
-
-#ifdef mkinit
-
-INCLUDE "output.h"
-INCLUDE "memalloc.h"
-
-RESET {
-	out1 = &output;
-	out2 = &errout;
-	if (memout.buf != NULL) {
-		ckfree(memout.buf);
-		memout.buf = NULL;
-	}
-}
-
-#endif
-
-
-#ifdef notdef	/* no longer used */
-/*
- * Set up an output file to write to memory rather than a file.
- */
-
-void
-open_mem(char *block, int length, struct output *file)
-{
-	file->nextc = block;
-	file->nleft = --length;
-	file->fd = BLOCK_OUT;
-	file->flags = 0;
-}
-#endif
-
-
-void
-out1str(const char *p)
-{
-	outstr(p, out1);
-}
-
-
-void
-out2str(const char *p)
-{
-	outstr(p, out2);
-}
-
-
-void
-outstr(const char *p, struct output *file)
-{
-	while (*p)
-		outc(*p++, file);
-	if (file == out2)
-		flushout(file);
-}
-
-
-char out_junk[16];
-
-
-void
-emptyoutbuf(struct output *dest)
-{
-	int offset;
-
-	if (dest->fd == BLOCK_OUT) {
-		dest->nextc = out_junk;
-		dest->nleft = sizeof out_junk;
-		dest->flags |= OUTPUT_ERR;
-	} else if (dest->buf == NULL) {
-		INTOFF;
-		dest->buf = ckmalloc(dest->bufsize);
-		dest->nextc = dest->buf;
-		dest->nleft = dest->bufsize;
-		INTON;
-	} else if (dest->fd == MEM_OUT) {
-		offset = dest->bufsize;
-		INTOFF;
-		dest->bufsize <<= 1;
-		dest->buf = ckrealloc(dest->buf, dest->bufsize);
-		dest->nleft = dest->bufsize - offset;
-		dest->nextc = dest->buf + offset;
-		INTON;
-	} else {
-		flushout(dest);
-	}
-	dest->nleft--;
-}
-
-
-void
-flushall(void)
-{
-	flushout(&output);
-	flushout(&errout);
-}
-
-
-void
-flushout(struct output *dest)
-{
-
-	if (dest->buf == NULL || dest->nextc == dest->buf || dest->fd < 0)
-		return;
-	if (xwrite(dest->fd, dest->buf, dest->nextc - dest->buf) < 0)
-		dest->flags |= OUTPUT_ERR;
-	dest->nextc = dest->buf;
-	dest->nleft = dest->bufsize;
-}
-
-
-void
-freestdout(void)
-{
-	INTOFF;
-	if (output.buf) {
-		ckfree(output.buf);
-		output.buf = NULL;
-		output.nleft = 0;
-	}
-	INTON;
-}
-
-
-void
-outfmt(struct output *file, const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(file, fmt, ap);
-	va_end(ap);
-}
-
-
-void
-out1fmt(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(out1, fmt, ap);
-	va_end(ap);
-}
-
-void
-dprintf(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	doformat(out2, fmt, ap);
-	va_end(ap);
-	flushout(out2);
-}
-
-void
-fmtstr(char *outbuf, size_t length, const char *fmt, ...)
-{
-	va_list ap;
-	struct output strout;
-
-	va_start(ap, fmt);
-	strout.nextc = outbuf;
-	strout.nleft = length;
-	strout.fd = BLOCK_OUT;
-	strout.flags = 0;
-	doformat(&strout, fmt, ap);
-	outc('\0', &strout);
-	if (strout.flags & OUTPUT_ERR)
-		outbuf[length - 1] = '\0';
-	va_end(ap);
-}
-
-/*
- * Formatted output.  This routine handles a subset of the printf formats:
- * - Formats supported: d, u, o, p, X, s, and c.
- * - The x format is also accepted but is treated like X.
- * - The l, ll and q modifiers are accepted.
- * - The - and # flags are accepted; # only works with the o format.
- * - Width and precision may be specified with any format except c.
- * - An * may be given for the width or precision.
- * - The obsolete practice of preceding the width with a zero to get
- *   zero padding is not supported; use the precision field.
- * - A % may be printed by writing %% in the format string.
- */
-
-#define TEMPSIZE 24
-
-#ifdef BSD4_4
-#define HAVE_VASPRINTF 1
-#endif
-
-void
-doformat(struct output *dest, const char *f, va_list ap)
-{
-#if	HAVE_VASPRINTF
-	char *s;
-
-	vasprintf(&s, f, ap);
-	outstr(s, dest);
-	free(s);     
-#else	/* !HAVE_VASPRINTF */
-	static const char digit[] = "0123456789ABCDEF";
-	char c;
-	char temp[TEMPSIZE];
-	int flushleft;
-	int sharp;
-	int width;
-	int prec;
-	int islong;
-	int isquad;
-	char *p;
-	int sign;
-#ifdef BSD4_4
-	quad_t l;
-	u_quad_t num;
-#else
-	long l;
-	u_long num;
-#endif
-	unsigned base;
-	int len;
-	int size;
-	int pad;
-
-	while ((c = *f++) != '\0') {
-		if (c != '%') {
-			outc(c, dest);
-			continue;
-		}
-		flushleft = 0;
-		sharp = 0;
-		width = 0;
-		prec = -1;
-		islong = 0;
-		isquad = 0;
-		for (;;) {
-			if (*f == '-')
-				flushleft++;
-			else if (*f == '#')
-				sharp++;
-			else
-				break;
-			f++;
-		}
-		if (*f == '*') {
-			width = va_arg(ap, int);
-			f++;
-		} else {
-			while (is_digit(*f)) {
-				width = 10 * width + digit_val(*f++);
-			}
-		}
-		if (*f == '.') {
-			if (*++f == '*') {
-				prec = va_arg(ap, int);
-				f++;
-			} else {
-				prec = 0;
-				while (is_digit(*f)) {
-					prec = 10 * prec + digit_val(*f++);
-				}
-			}
-		}
-		if (*f == 'l') {
-			f++;
-			if (*f == 'l') {
-				isquad++;
-				f++;
-			} else
-				islong++;
-		} else if (*f == 'q') {
-			isquad++;
-			f++;
-		}
-		switch (*f) {
-		case 'd':
-#ifdef BSD4_4
-			if (isquad)
-				l = va_arg(ap, quad_t);
-			else
-#endif
-			if (islong)
-				l = va_arg(ap, long);
-			else
-				l = va_arg(ap, int);
-			sign = 0;
-			num = l;
-			if (l < 0) {
-				num = -l;
-				sign = 1;
-			}
-			base = 10;
-			goto number;
-		case 'u':
-			base = 10;
-			goto uns_number;
-		case 'o':
-			base = 8;
-			goto uns_number;
-		case 'p':
-			outc('0', dest);
-			outc('x', dest);
-			/*FALLTHROUGH*/
-		case 'x':
-			/* we don't implement 'x'; treat like 'X' */
-		case 'X':
-			base = 16;
-uns_number:	  /* an unsigned number */
-			sign = 0;
-#ifdef BSD4_4
-			if (isquad)
-				num = va_arg(ap, u_quad_t);
-			else
-#endif
-			if (islong)
-				num = va_arg(ap, unsigned long);
-			else
-				num = va_arg(ap, unsigned int);
-number:		  /* process a number */
-			p = temp + TEMPSIZE - 1;
-			*p = '\0';
-			while (num) {
-				*--p = digit[num % base];
-				num /= base;
-			}
-			len = (temp + TEMPSIZE - 1) - p;
-			if (prec < 0)
-				prec = 1;
-			if (sharp && *f == 'o' && prec <= len)
-				prec = len + 1;
-			pad = 0;
-			if (width) {
-				size = len;
-				if (size < prec)
-					size = prec;
-				size += sign;
-				pad = width - size;
-				if (flushleft == 0) {
-					while (--pad >= 0)
-						outc(' ', dest);
-				}
-			}
-			if (sign)
-				outc('-', dest);
-			prec -= len;
-			while (--prec >= 0)
-				outc('0', dest);
-			while (*p)
-				outc(*p++, dest);
-			while (--pad >= 0)
-				outc(' ', dest);
-			break;
-		case 's':
-			p = va_arg(ap, char *);
-			pad = 0;
-			if (width) {
-				len = strlen(p);
-				if (prec >= 0 && len > prec)
-					len = prec;
-				pad = width - len;
-				if (flushleft == 0) {
-					while (--pad >= 0)
-						outc(' ', dest);
-				}
-			}
-			prec++;
-			while (--prec != 0 && *p)
-				outc(*p++, dest);
-			while (--pad >= 0)
-				outc(' ', dest);
-			break;
-		case 'c':
-			c = va_arg(ap, int);
-			outc(c, dest);
-			break;
-		default:
-			outc(*f, dest);
-			break;
-		}
-		f++;
-	}
-#endif	/* !HAVE_VASPRINTF */
-}
-
-
-
-/*
- * Version of write which resumes after a signal is caught.
- */
-
-int
-xwrite(int fd, char *buf, int nbytes)
-{
-	int ntry;
-	int i;
-	int n;
-
-	n = nbytes;
-	ntry = 0;
-	for (;;) {
-		i = write(fd, buf, n);
-		if (i > 0) {
-			if ((n -= i) <= 0)
-				return nbytes;
-			buf += i;
-			ntry = 0;
-		} else if (i == 0) {
-			if (++ntry > 10)
-				return nbytes - n;
-		} else if (errno != EINTR) {
-			return -1;
-		}
-	}
-}
-
-
-/*
- * Version of ioctl that retries after a signal is caught.
- * XXX unused function
- */
-
-int
-xioctl(int fd, unsigned long request, char *arg)
-{
-	int i;
-
-	while ((i = ioctl(fd, request, arg)) == -1 && errno == EINTR);
-	return i;
-}
diff --git a/sh/output.h b/sh/output.h
deleted file mode 100644
index 9a199a0..0000000
--- a/sh/output.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*	$NetBSD: output.h,v 1.17 2003/08/07 09:05:36 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)output.h	8.2 (Berkeley) 5/4/95
- */
-
-#ifndef OUTPUT_INCL
-
-#include <stdarg.h>
-
-struct output {
-	char *nextc;
-	int nleft;
-	char *buf;
-	int bufsize;
-	short fd;
-	short flags;
-};
-
-extern struct output output;
-extern struct output errout;
-extern struct output memout;
-extern struct output *out1;
-extern struct output *out2;
-
-void open_mem(char *, int, struct output *);
-void out1str(const char *);
-void out2str(const char *);
-void outstr(const char *, struct output *);
-void emptyoutbuf(struct output *);
-void flushall(void);
-void flushout(struct output *);
-void freestdout(void);
-void outfmt(struct output *, const char *, ...)
-    __attribute__((__format__(__printf__,2,3)));
-void out1fmt(const char *, ...)
-    __attribute__((__format__(__printf__,1,2)));
-void dprintf(const char *, ...)
-    __attribute__((__format__(__printf__,1,2)));
-void fmtstr(char *, size_t, const char *, ...)
-    __attribute__((__format__(__printf__,3,4)));
-void doformat(struct output *, const char *, va_list);
-int xwrite(int, char *, int);
-int xioctl(int, unsigned long, char *);
-
-#define outc(c, file)	(--(file)->nleft < 0? (emptyoutbuf(file), *(file)->nextc++ = (c)) : (*(file)->nextc++ = (c)))
-#define out1c(c)	outc(c, out1);
-#define out2c(c)	outc(c, out2);
-
-#define OUTPUT_INCL
-#endif
diff --git a/sh/parser.c b/sh/parser.c
deleted file mode 100644
index faf0268..0000000
--- a/sh/parser.c
+++ /dev/null
@@ -1,1654 +0,0 @@
-/*	$NetBSD: parser.c,v 1.57 2004/06/27 10:27:57 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)parser.c	8.7 (Berkeley) 5/16/95";
-#else
-__RCSID("$NetBSD: parser.c,v 1.57 2004/06/27 10:27:57 dsl Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdlib.h>
-
-#include "shell.h"
-#include "parser.h"
-#include "nodes.h"
-#include "expand.h"	/* defines rmescapes() */
-#include "eval.h"	/* defines commandname */
-#include "redir.h"	/* defines copyfd() */
-#include "syntax.h"
-#include "options.h"
-#include "input.h"
-#include "output.h"
-#include "var.h"
-#include "error.h"
-#include "memalloc.h"
-#include "mystring.h"
-#include "alias.h"
-#include "show.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-
-/*
- * Shell command parser.
- */
-
-#define EOFMARKLEN 79
-
-/* values returned by readtoken */
-#include "token.h"
-
-#define OPENBRACE '{'
-#define CLOSEBRACE '}'
-
-
-struct heredoc {
-	struct heredoc *next;	/* next here document in list */
-	union node *here;		/* redirection node */
-	char *eofmark;		/* string indicating end of input */
-	int striptabs;		/* if set, strip leading tabs */
-};
-
-
-
-static int noalias = 0;		/* when set, don't handle aliases */
-struct heredoc *heredoclist;	/* list of here documents to read */
-int parsebackquote;		/* nonzero if we are inside backquotes */
-int doprompt;			/* if set, prompt the user */
-int needprompt;			/* true if interactive and at start of line */
-int lasttoken;			/* last token read */
-MKINIT int tokpushback;		/* last token pushed back */
-char *wordtext;			/* text of last word returned by readtoken */
-MKINIT int checkkwd;            /* 1 == check for kwds, 2 == also eat newlines */
-struct nodelist *backquotelist;
-union node *redirnode;
-struct heredoc *heredoc;
-int quoteflag;			/* set if (part of) last token was quoted */
-int startlinno;			/* line # where last token started */
-
-
-STATIC union node *list(int);
-STATIC union node *andor(void);
-STATIC union node *pipeline(void);
-STATIC union node *command(void);
-STATIC union node *simplecmd(union node **, union node *);
-STATIC union node *makename(void);
-STATIC void parsefname(void);
-STATIC void parseheredoc(void);
-STATIC int peektoken(void);
-STATIC int readtoken(void);
-STATIC int xxreadtoken(void);
-STATIC int readtoken1(int, char const *, char *, int);
-STATIC int noexpand(char *);
-STATIC void synexpect(int) __attribute__((__noreturn__));
-STATIC void synerror(const char *) __attribute__((__noreturn__));
-STATIC void setprompt(int);
-
-
-/*
- * Read and parse a command.  Returns NEOF on end of file.  (NULL is a
- * valid parse tree indicating a blank line.)
- */
-
-union node *
-parsecmd(int interact)
-{
-	int t;
-
-	tokpushback = 0;
-	doprompt = interact;
-	if (doprompt)
-		setprompt(1);
-	else
-		setprompt(0);
-	needprompt = 0;
-	t = readtoken();
-	if (t == TEOF)
-		return NEOF;
-	if (t == TNL)
-		return NULL;
-	tokpushback++;
-	return list(1);
-}
-
-
-STATIC union node *
-list(int nlflag)
-{
-	union node *n1, *n2, *n3;
-	int tok;
-
-	checkkwd = 2;
-	if (nlflag == 0 && tokendlist[peektoken()])
-		return NULL;
-	n1 = NULL;
-	for (;;) {
-		n2 = andor();
-		tok = readtoken();
-		if (tok == TBACKGND) {
-			if (n2->type == NCMD || n2->type == NPIPE) {
-				n2->ncmd.backgnd = 1;
-			} else if (n2->type == NREDIR) {
-				n2->type = NBACKGND;
-			} else {
-				n3 = (union node *)stalloc(sizeof (struct nredir));
-				n3->type = NBACKGND;
-				n3->nredir.n = n2;
-				n3->nredir.redirect = NULL;
-				n2 = n3;
-			}
-		}
-		if (n1 == NULL) {
-			n1 = n2;
-		}
-		else {
-			n3 = (union node *)stalloc(sizeof (struct nbinary));
-			n3->type = NSEMI;
-			n3->nbinary.ch1 = n1;
-			n3->nbinary.ch2 = n2;
-			n1 = n3;
-		}
-		switch (tok) {
-		case TBACKGND:
-		case TSEMI:
-			tok = readtoken();
-			/* fall through */
-		case TNL:
-			if (tok == TNL) {
-				parseheredoc();
-				if (nlflag)
-					return n1;
-			} else {
-				tokpushback++;
-			}
-			checkkwd = 2;
-			if (tokendlist[peektoken()])
-				return n1;
-			break;
-		case TEOF:
-			if (heredoclist)
-				parseheredoc();
-			else
-				pungetc();		/* push back EOF on input */
-			return n1;
-		default:
-			if (nlflag)
-				synexpect(-1);
-			tokpushback++;
-			return n1;
-		}
-	}
-}
-
-
-
-STATIC union node *
-andor(void)
-{
-	union node *n1, *n2, *n3;
-	int t;
-
-	n1 = pipeline();
-	for (;;) {
-		if ((t = readtoken()) == TAND) {
-			t = NAND;
-		} else if (t == TOR) {
-			t = NOR;
-		} else {
-			tokpushback++;
-			return n1;
-		}
-		n2 = pipeline();
-		n3 = (union node *)stalloc(sizeof (struct nbinary));
-		n3->type = t;
-		n3->nbinary.ch1 = n1;
-		n3->nbinary.ch2 = n2;
-		n1 = n3;
-	}
-}
-
-
-
-STATIC union node *
-pipeline(void)
-{
-	union node *n1, *n2, *pipenode;
-	struct nodelist *lp, *prev;
-	int negate;
-
-	negate = 0;
-	TRACE(("pipeline: entered\n"));
-	while (readtoken() == TNOT)
-		negate = !negate;
-	tokpushback++;
-	n1 = command();
-	if (readtoken() == TPIPE) {
-		pipenode = (union node *)stalloc(sizeof (struct npipe));
-		pipenode->type = NPIPE;
-		pipenode->npipe.backgnd = 0;
-		lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-		pipenode->npipe.cmdlist = lp;
-		lp->n = n1;
-		do {
-			prev = lp;
-			lp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-			lp->n = command();
-			prev->next = lp;
-		} while (readtoken() == TPIPE);
-		lp->next = NULL;
-		n1 = pipenode;
-	}
-	tokpushback++;
-	if (negate) {
-		n2 = (union node *)stalloc(sizeof (struct nnot));
-		n2->type = NNOT;
-		n2->nnot.com = n1;
-		return n2;
-	} else
-		return n1;
-}
-
-
-
-STATIC union node *
-command(void)
-{
-	union node *n1, *n2;
-	union node *ap, **app;
-	union node *cp, **cpp;
-	union node *redir, **rpp;
-	int t, negate = 0;
-
-	checkkwd = 2;
-	redir = NULL;
-	n1 = NULL;
-	rpp = &redir;
-
-	/* Check for redirection which may precede command */
-	while (readtoken() == TREDIR) {
-		*rpp = n2 = redirnode;
-		rpp = &n2->nfile.next;
-		parsefname();
-	}
-	tokpushback++;
-
-	while (readtoken() == TNOT) {
-		TRACE(("command: TNOT recognized\n"));
-		negate = !negate;
-	}
-	tokpushback++;
-
-	switch (readtoken()) {
-	case TIF:
-		n1 = (union node *)stalloc(sizeof (struct nif));
-		n1->type = NIF;
-		n1->nif.test = list(0);
-		if (readtoken() != TTHEN)
-			synexpect(TTHEN);
-		n1->nif.ifpart = list(0);
-		n2 = n1;
-		while (readtoken() == TELIF) {
-			n2->nif.elsepart = (union node *)stalloc(sizeof (struct nif));
-			n2 = n2->nif.elsepart;
-			n2->type = NIF;
-			n2->nif.test = list(0);
-			if (readtoken() != TTHEN)
-				synexpect(TTHEN);
-			n2->nif.ifpart = list(0);
-		}
-		if (lasttoken == TELSE)
-			n2->nif.elsepart = list(0);
-		else {
-			n2->nif.elsepart = NULL;
-			tokpushback++;
-		}
-		if (readtoken() != TFI)
-			synexpect(TFI);
-		checkkwd = 1;
-		break;
-	case TWHILE:
-	case TUNTIL: {
-		int got;
-		n1 = (union node *)stalloc(sizeof (struct nbinary));
-		n1->type = (lasttoken == TWHILE)? NWHILE : NUNTIL;
-		n1->nbinary.ch1 = list(0);
-		if ((got=readtoken()) != TDO) {
-TRACE(("expecting DO got %s %s\n", tokname[got], got == TWORD ? wordtext : ""));
-			synexpect(TDO);
-		}
-		n1->nbinary.ch2 = list(0);
-		if (readtoken() != TDONE)
-			synexpect(TDONE);
-		checkkwd = 1;
-		break;
-	}
-	case TFOR:
-		if (readtoken() != TWORD || quoteflag || ! goodname(wordtext))
-			synerror("Bad for loop variable");
-		n1 = (union node *)stalloc(sizeof (struct nfor));
-		n1->type = NFOR;
-		n1->nfor.var = wordtext;
-		if (readtoken() == TWORD && ! quoteflag && equal(wordtext, "in")) {
-			app = &ap;
-			while (readtoken() == TWORD) {
-				n2 = (union node *)stalloc(sizeof (struct narg));
-				n2->type = NARG;
-				n2->narg.text = wordtext;
-				n2->narg.backquote = backquotelist;
-				*app = n2;
-				app = &n2->narg.next;
-			}
-			*app = NULL;
-			n1->nfor.args = ap;
-			if (lasttoken != TNL && lasttoken != TSEMI)
-				synexpect(-1);
-		} else {
-			static char argvars[5] = {CTLVAR, VSNORMAL|VSQUOTE,
-								   '@', '=', '\0'};
-			n2 = (union node *)stalloc(sizeof (struct narg));
-			n2->type = NARG;
-			n2->narg.text = argvars;
-			n2->narg.backquote = NULL;
-			n2->narg.next = NULL;
-			n1->nfor.args = n2;
-			/*
-			 * Newline or semicolon here is optional (but note
-			 * that the original Bourne shell only allowed NL).
-			 */
-			if (lasttoken != TNL && lasttoken != TSEMI)
-				tokpushback++;
-		}
-		checkkwd = 2;
-		if ((t = readtoken()) == TDO)
-			t = TDONE;
-		else if (t == TBEGIN)
-			t = TEND;
-		else
-			synexpect(-1);
-		n1->nfor.body = list(0);
-		if (readtoken() != t)
-			synexpect(t);
-		checkkwd = 1;
-		break;
-	case TCASE:
-		n1 = (union node *)stalloc(sizeof (struct ncase));
-		n1->type = NCASE;
-		if (readtoken() != TWORD)
-			synexpect(TWORD);
-		n1->ncase.expr = n2 = (union node *)stalloc(sizeof (struct narg));
-		n2->type = NARG;
-		n2->narg.text = wordtext;
-		n2->narg.backquote = backquotelist;
-		n2->narg.next = NULL;
-		while (readtoken() == TNL);
-		if (lasttoken != TWORD || ! equal(wordtext, "in"))
-			synerror("expecting \"in\"");
-		cpp = &n1->ncase.cases;
-		noalias = 1;
-		checkkwd = 2, readtoken();
-		do {
-			*cpp = cp = (union node *)stalloc(sizeof (struct nclist));
-			cp->type = NCLIST;
-			app = &cp->nclist.pattern;
-			for (;;) {
-				*app = ap = (union node *)stalloc(sizeof (struct narg));
-				ap->type = NARG;
-				ap->narg.text = wordtext;
-				ap->narg.backquote = backquotelist;
-				if (checkkwd = 2, readtoken() != TPIPE)
-					break;
-				app = &ap->narg.next;
-				readtoken();
-			}
-			ap->narg.next = NULL;
-			noalias = 0;
-			if (lasttoken != TRP) {
-				synexpect(TRP);
-			}
-			cp->nclist.body = list(0);
-
-			checkkwd = 2;
-			if ((t = readtoken()) != TESAC) {
-				if (t != TENDCASE) {
-					noalias = 0;
-					synexpect(TENDCASE);
-				} else {
-					noalias = 1;
-					checkkwd = 2;
-					readtoken();
-				}
-			}
-			cpp = &cp->nclist.next;
-		} while(lasttoken != TESAC);
-		noalias = 0;
-		*cpp = NULL;
-		checkkwd = 1;
-		break;
-	case TLP:
-		n1 = (union node *)stalloc(sizeof (struct nredir));
-		n1->type = NSUBSHELL;
-		n1->nredir.n = list(0);
-		n1->nredir.redirect = NULL;
-		if (readtoken() != TRP)
-			synexpect(TRP);
-		checkkwd = 1;
-		break;
-	case TBEGIN:
-		n1 = list(0);
-		if (readtoken() != TEND)
-			synexpect(TEND);
-		checkkwd = 1;
-		break;
-	/* Handle an empty command like other simple commands.  */
-	case TSEMI:
-		/*
-		 * An empty command before a ; doesn't make much sense, and
-		 * should certainly be disallowed in the case of `if ;'.
-		 */
-		if (!redir)
-			synexpect(-1);
-	case TAND:
-	case TOR:
-	case TNL:
-	case TEOF:
-	case TWORD:
-	case TRP:
-		tokpushback++;
-		n1 = simplecmd(rpp, redir);
-		goto checkneg;
-	default:
-		synexpect(-1);
-		/* NOTREACHED */
-	}
-
-	/* Now check for redirection which may follow command */
-	while (readtoken() == TREDIR) {
-		*rpp = n2 = redirnode;
-		rpp = &n2->nfile.next;
-		parsefname();
-	}
-	tokpushback++;
-	*rpp = NULL;
-	if (redir) {
-		if (n1->type != NSUBSHELL) {
-			n2 = (union node *)stalloc(sizeof (struct nredir));
-			n2->type = NREDIR;
-			n2->nredir.n = n1;
-			n1 = n2;
-		}
-		n1->nredir.redirect = redir;
-	}
-
-checkneg:
-	if (negate) {
-		n2 = (union node *)stalloc(sizeof (struct nnot));
-		n2->type = NNOT;
-		n2->nnot.com = n1;
-		return n2;
-	}
-	else
-		return n1;
-}
-
-
-STATIC union node *
-simplecmd(union node **rpp, union node *redir)
-{
-	union node *args, **app;
-	union node **orig_rpp = rpp;
-	union node *n = NULL, *n2;
-	int negate = 0;
-
-	/* If we don't have any redirections already, then we must reset */
-	/* rpp to be the address of the local redir variable.  */
-	if (redir == 0)
-		rpp = &redir;
-
-	args = NULL;
-	app = &args;
-	/*
-	 * We save the incoming value, because we need this for shell
-	 * functions.  There can not be a redirect or an argument between
-	 * the function name and the open parenthesis.
-	 */
-	orig_rpp = rpp;
-
-	while (readtoken() == TNOT) {
-		TRACE(("command: TNOT recognized\n"));
-		negate = !negate;
-	}
-	tokpushback++;
-
-	for (;;) {
-		if (readtoken() == TWORD) {
-			n = (union node *)stalloc(sizeof (struct narg));
-			n->type = NARG;
-			n->narg.text = wordtext;
-			n->narg.backquote = backquotelist;
-			*app = n;
-			app = &n->narg.next;
-		} else if (lasttoken == TREDIR) {
-			*rpp = n = redirnode;
-			rpp = &n->nfile.next;
-			parsefname();	/* read name of redirection file */
-		} else if (lasttoken == TLP && app == &args->narg.next
-					    && rpp == orig_rpp) {
-			/* We have a function */
-			if (readtoken() != TRP)
-				synexpect(TRP);
-#ifdef notdef
-			if (! goodname(n->narg.text))
-				synerror("Bad function name");
-#endif
-			n->type = NDEFUN;
-			n->narg.next = command();
-			goto checkneg;
-		} else {
-			tokpushback++;
-			break;
-		}
-	}
-	*app = NULL;
-	*rpp = NULL;
-	n = (union node *)stalloc(sizeof (struct ncmd));
-	n->type = NCMD;
-	n->ncmd.backgnd = 0;
-	n->ncmd.args = args;
-	n->ncmd.redirect = redir;
-
-checkneg:
-	if (negate) {
-		n2 = (union node *)stalloc(sizeof (struct nnot));
-		n2->type = NNOT;
-		n2->nnot.com = n;
-		return n2;
-	}
-	else
-		return n;
-}
-
-STATIC union node *
-makename(void)
-{
-	union node *n;
-
-	n = (union node *)stalloc(sizeof (struct narg));
-	n->type = NARG;
-	n->narg.next = NULL;
-	n->narg.text = wordtext;
-	n->narg.backquote = backquotelist;
-	return n;
-}
-
-void fixredir(union node *n, const char *text, int err)
-	{
-	TRACE(("Fix redir %s %d\n", text, err));
-	if (!err)
-		n->ndup.vname = NULL;
-
-	if (is_digit(text[0]) && text[1] == '\0')
-		n->ndup.dupfd = digit_val(text[0]);
-	else if (text[0] == '-' && text[1] == '\0')
-		n->ndup.dupfd = -1;
-	else {
-
-		if (err)
-			synerror("Bad fd number");
-		else
-			n->ndup.vname = makename();
-	}
-}
-
-
-STATIC void
-parsefname(void)
-{
-	union node *n = redirnode;
-
-	if (readtoken() != TWORD)
-		synexpect(-1);
-	if (n->type == NHERE) {
-		struct heredoc *here = heredoc;
-		struct heredoc *p;
-		int i;
-
-		if (quoteflag == 0)
-			n->type = NXHERE;
-		TRACE(("Here document %d\n", n->type));
-		if (here->striptabs) {
-			while (*wordtext == '\t')
-				wordtext++;
-		}
-		if (! noexpand(wordtext) || (i = strlen(wordtext)) == 0 || i > EOFMARKLEN)
-			synerror("Illegal eof marker for << redirection");
-		rmescapes(wordtext);
-		here->eofmark = wordtext;
-		here->next = NULL;
-		if (heredoclist == NULL)
-			heredoclist = here;
-		else {
-			for (p = heredoclist ; p->next ; p = p->next);
-			p->next = here;
-		}
-	} else if (n->type == NTOFD || n->type == NFROMFD) {
-		fixredir(n, wordtext, 0);
-	} else {
-		n->nfile.fname = makename();
-	}
-}
-
-
-/*
- * Input any here documents.
- */
-
-STATIC void
-parseheredoc(void)
-{
-	struct heredoc *here;
-	union node *n;
-
-	while (heredoclist) {
-		here = heredoclist;
-		heredoclist = here->next;
-		if (needprompt) {
-			setprompt(2);
-			needprompt = 0;
-		}
-		readtoken1(pgetc(), here->here->type == NHERE? SQSYNTAX : DQSYNTAX,
-				here->eofmark, here->striptabs);
-		n = (union node *)stalloc(sizeof (struct narg));
-		n->narg.type = NARG;
-		n->narg.next = NULL;
-		n->narg.text = wordtext;
-		n->narg.backquote = backquotelist;
-		here->here->nhere.doc = n;
-	}
-}
-
-STATIC int
-peektoken(void)
-{
-	int t;
-
-	t = readtoken();
-	tokpushback++;
-	return (t);
-}
-
-STATIC int
-readtoken(void)
-{
-	int t;
-	int savecheckkwd = checkkwd;
-#ifdef DEBUG
-	int alreadyseen = tokpushback;
-#endif
-	struct alias *ap;
-
-	top:
-	t = xxreadtoken();
-
-	if (checkkwd) {
-		/*
-		 * eat newlines
-		 */
-		if (checkkwd == 2) {
-			checkkwd = 0;
-			while (t == TNL) {
-				parseheredoc();
-				t = xxreadtoken();
-			}
-		} else
-			checkkwd = 0;
-		/*
-		 * check for keywords and aliases
-		 */
-		if (t == TWORD && !quoteflag)
-		{
-			const char *const *pp;
-
-			for (pp = parsekwd; *pp; pp++) {
-				if (**pp == *wordtext && equal(*pp, wordtext))
-				{
-					lasttoken = t = pp - 
-					    parsekwd + KWDOFFSET;
-					TRACE(("keyword %s recognized\n", tokname[t]));
-					goto out;
-				}
-			}
-			if(!noalias &&
-			    (ap = lookupalias(wordtext, 1)) != NULL) {
-				pushstring(ap->val, strlen(ap->val), ap);
-				checkkwd = savecheckkwd;
-				goto top;
-			}
-		}
-out:
-		checkkwd = (t == TNOT) ? savecheckkwd : 0;
-	}
-#ifdef DEBUG
-	if (!alreadyseen)
-	    TRACE(("token %s %s\n", tokname[t], t == TWORD ? wordtext : ""));
-	else
-	    TRACE(("reread token %s %s\n", tokname[t], t == TWORD ? wordtext : ""));
-#endif
-	return (t);
-}
-
-
-/*
- * Read the next input token.
- * If the token is a word, we set backquotelist to the list of cmds in
- *	backquotes.  We set quoteflag to true if any part of the word was
- *	quoted.
- * If the token is TREDIR, then we set redirnode to a structure containing
- *	the redirection.
- * In all cases, the variable startlinno is set to the number of the line
- *	on which the token starts.
- *
- * [Change comment:  here documents and internal procedures]
- * [Readtoken shouldn't have any arguments.  Perhaps we should make the
- *  word parsing code into a separate routine.  In this case, readtoken
- *  doesn't need to have any internal procedures, but parseword does.
- *  We could also make parseoperator in essence the main routine, and
- *  have parseword (readtoken1?) handle both words and redirection.]
- */
-
-#define RETURN(token)	return lasttoken = token
-
-STATIC int
-xxreadtoken(void)
-{
-	int c;
-
-	if (tokpushback) {
-		tokpushback = 0;
-		return lasttoken;
-	}
-	if (needprompt) {
-		setprompt(2);
-		needprompt = 0;
-	}
-	startlinno = plinno;
-	for (;;) {	/* until token or start of word found */
-		c = pgetc_macro();
-		if (c == ' ' || c == '\t')
-			continue;		/* quick check for white space first */
-		switch (c) {
-		case ' ': case '\t':
-			continue;
-		case '#':
-			while ((c = pgetc()) != '\n' && c != PEOF);
-			pungetc();
-			continue;
-		case '\\':
-			if (pgetc() == '\n') {
-				startlinno = ++plinno;
-				if (doprompt)
-					setprompt(2);
-				else
-					setprompt(0);
-				continue;
-			}
-			pungetc();
-			goto breakloop;
-		case '\n':
-			plinno++;
-			needprompt = doprompt;
-			RETURN(TNL);
-		case PEOF:
-			RETURN(TEOF);
-		case '&':
-			if (pgetc() == '&')
-				RETURN(TAND);
-			pungetc();
-			RETURN(TBACKGND);
-		case '|':
-			if (pgetc() == '|')
-				RETURN(TOR);
-			pungetc();
-			RETURN(TPIPE);
-		case ';':
-			if (pgetc() == ';')
-				RETURN(TENDCASE);
-			pungetc();
-			RETURN(TSEMI);
-		case '(':
-			RETURN(TLP);
-		case ')':
-			RETURN(TRP);
-		default:
-			goto breakloop;
-		}
-	}
-breakloop:
-	return readtoken1(c, BASESYNTAX, (char *)NULL, 0);
-#undef RETURN
-}
-
-
-
-/*
- * If eofmark is NULL, read a word or a redirection symbol.  If eofmark
- * is not NULL, read a here document.  In the latter case, eofmark is the
- * word which marks the end of the document and striptabs is true if
- * leading tabs should be stripped from the document.  The argument firstc
- * is the first character of the input token or document.
- *
- * Because C does not have internal subroutines, I have simulated them
- * using goto's to implement the subroutine linkage.  The following macros
- * will run code that appears at the end of readtoken1.
- */
-
-#define CHECKEND()	{goto checkend; checkend_return:;}
-#define PARSEREDIR()	{goto parseredir; parseredir_return:;}
-#define PARSESUB()	{goto parsesub; parsesub_return:;}
-#define PARSEBACKQOLD()	{oldstyle = 1; goto parsebackq; parsebackq_oldreturn:;}
-#define PARSEBACKQNEW()	{oldstyle = 0; goto parsebackq; parsebackq_newreturn:;}
-#define	PARSEARITH()	{goto parsearith; parsearith_return:;}
-
-/*
- * Keep track of nested doublequotes in dblquote and doublequotep.
- * We use dblquote for the first 32 levels, and we expand to a malloc'ed
- * region for levels above that. Usually we never need to malloc.
- * This code assumes that an int is 32 bits. We don't use uint32_t,
- * because the rest of the code does not.
- */
-#define ISDBLQUOTE() ((varnest < 32) ? (dblquote & (1 << varnest)) : \
-    (dblquotep[(varnest / 32) - 1] & (1 << (varnest % 32))))
-
-#define SETDBLQUOTE() \
-    if (varnest < 32) \
-	dblquote |= (1 << varnest); \
-    else \
-	dblquotep[(varnest / 32) - 1] |= (1 << (varnest % 32))
-
-#define CLRDBLQUOTE() \
-    if (varnest < 32) \
-	dblquote &= ~(1 << varnest); \
-    else \
-	dblquotep[(varnest / 32) - 1] &= ~(1 << (varnest % 32))
-
-STATIC int
-readtoken1(int firstc, char const *syntax, char *eofmark, int striptabs)
-{
-	int c = firstc;
-	char *out;
-	int len;
-	char line[EOFMARKLEN + 1];
-	struct nodelist *bqlist;
-	int quotef;
-	int *dblquotep = NULL;
-	size_t maxnest = 32;
-	int dblquote;
-	int varnest;	/* levels of variables expansion */
-	int arinest;	/* levels of arithmetic expansion */
-	int parenlevel;	/* levels of parens in arithmetic */
-	int oldstyle;
-	char const *prevsyntax = NULL;	/* syntax before arithmetic */
-#if __GNUC__
-	/* Avoid longjmp clobbering */
-	(void) &maxnest;
-	(void) &dblquotep;
-	(void) &out;
-	(void) &quotef;
-	(void) &dblquote;
-	(void) &varnest;
-	(void) &arinest;
-	(void) &parenlevel;
-	(void) &oldstyle;
-	(void) &prevsyntax;
-	(void) &syntax;
-#endif
-
-	startlinno = plinno;
-	dblquote = 0;
-	varnest = 0;
-	if (syntax == DQSYNTAX) {
-		SETDBLQUOTE();
-	}
-	quotef = 0;
-	bqlist = NULL;
-	arinest = 0;
-	parenlevel = 0;
-
-	STARTSTACKSTR(out);
-	loop: {	/* for each line, until end of word */
-#if ATTY
-		if (c == '\034' && doprompt
-		 && attyset() && ! equal(termval(), "emacs")) {
-			attyline();
-			if (syntax == BASESYNTAX)
-				return readtoken();
-			c = pgetc();
-			goto loop;
-		}
-#endif
-		CHECKEND();	/* set c to PEOF if at end of here document */
-		for (;;) {	/* until end of line or end of word */
-			CHECKSTRSPACE(4, out);	/* permit 4 calls to USTPUTC */
-			switch(syntax[c]) {
-			case CNL:	/* '\n' */
-				if (syntax == BASESYNTAX)
-					goto endword;	/* exit outer loop */
-				USTPUTC(c, out);
-				plinno++;
-				if (doprompt)
-					setprompt(2);
-				else
-					setprompt(0);
-				c = pgetc();
-				goto loop;		/* continue outer loop */
-			case CWORD:
-				USTPUTC(c, out);
-				break;
-			case CCTL:
-				if (eofmark == NULL || ISDBLQUOTE())
-					USTPUTC(CTLESC, out);
-				USTPUTC(c, out);
-				break;
-			case CBACK:	/* backslash */
-				c = pgetc();
-				if (c == PEOF) {
-					USTPUTC('\\', out);
-					pungetc();
-					break;
-				}
-				if (c == '\n') {
-					if (doprompt)
-						setprompt(2);
-					else
-						setprompt(0);
-					break;
-				}
-				quotef = 1;
-				if (ISDBLQUOTE() && c != '\\' &&
-				    c != '`' && c != '$' &&
-				    (c != '"' || eofmark != NULL))
-					USTPUTC('\\', out);
-				if (SQSYNTAX[c] == CCTL)
-					USTPUTC(CTLESC, out);
-				else if (eofmark == NULL) {
-					USTPUTC(CTLQUOTEMARK, out);
-					USTPUTC(c, out);
-					if (varnest != 0)
-						USTPUTC(CTLQUOTEEND, out);
-					break;
-				}
-				USTPUTC(c, out);
-				break;
-			case CSQUOTE:
-				if (syntax != SQSYNTAX) {
-					if (eofmark == NULL)
-						USTPUTC(CTLQUOTEMARK, out);
-					quotef = 1;
-					syntax = SQSYNTAX;
-					break;
-				}
-				if (eofmark != NULL && arinest == 0 &&
-				    varnest == 0) {
-					/* Ignore inside quoted here document */
-					USTPUTC(c, out);
-					break;
-				}
-				/* End of single quotes... */
-				if (arinest)
-					syntax = ARISYNTAX;
-				else {
-					syntax = BASESYNTAX;
-					if (varnest != 0)
-						USTPUTC(CTLQUOTEEND, out);
-				}
-				break;
-			case CDQUOTE:
-				if (eofmark != NULL && arinest == 0 &&
-				    varnest == 0) {
-					/* Ignore inside here document */
-					USTPUTC(c, out);
-					break;
-				}
-				quotef = 1;
-				if (arinest) {
-					if (ISDBLQUOTE()) {
-						syntax = ARISYNTAX;
-						CLRDBLQUOTE();
-					} else {
-						syntax = DQSYNTAX;
-						SETDBLQUOTE();
-						USTPUTC(CTLQUOTEMARK, out);
-					}
-					break;
-				}
-				if (eofmark != NULL)
-					break;
-				if (ISDBLQUOTE()) {
-					if (varnest != 0)
-						USTPUTC(CTLQUOTEEND, out);
-					syntax = BASESYNTAX;
-					CLRDBLQUOTE();
-				} else {
-					syntax = DQSYNTAX;
-					SETDBLQUOTE();
-					USTPUTC(CTLQUOTEMARK, out);
-				}
-				break;
-			case CVAR:	/* '$' */
-				PARSESUB();		/* parse substitution */
-				break;
-			case CENDVAR:	/* CLOSEBRACE */
-				if (varnest > 0 && !ISDBLQUOTE()) {
-					varnest--;
-					USTPUTC(CTLENDVAR, out);
-				} else {
-					USTPUTC(c, out);
-				}
-				break;
-			case CLP:	/* '(' in arithmetic */
-				parenlevel++;
-				USTPUTC(c, out);
-				break;
-			case CRP:	/* ')' in arithmetic */
-				if (parenlevel > 0) {
-					USTPUTC(c, out);
-					--parenlevel;
-				} else {
-					if (pgetc() == ')') {
-						if (--arinest == 0) {
-							USTPUTC(CTLENDARI, out);
-							syntax = prevsyntax;
-							if (syntax == DQSYNTAX)
-								SETDBLQUOTE();
-							else
-								CLRDBLQUOTE();
-						} else
-							USTPUTC(')', out);
-					} else {
-						/*
-						 * unbalanced parens
-						 *  (don't 2nd guess - no error)
-						 */
-						pungetc();
-						USTPUTC(')', out);
-					}
-				}
-				break;
-			case CBQUOTE:	/* '`' */
-				PARSEBACKQOLD();
-				break;
-			case CEOF:
-				goto endword;		/* exit outer loop */
-			default:
-				if (varnest == 0)
-					goto endword;	/* exit outer loop */
-				USTPUTC(c, out);
-			}
-			c = pgetc_macro();
-		}
-	}
-endword:
-	if (syntax == ARISYNTAX)
-		synerror("Missing '))'");
-	if (syntax != BASESYNTAX && ! parsebackquote && eofmark == NULL)
-		synerror("Unterminated quoted string");
-	if (varnest != 0) {
-		startlinno = plinno;
-		/* { */
-		synerror("Missing '}'");
-	}
-	USTPUTC('\0', out);
-	len = out - stackblock();
-	out = stackblock();
-	if (eofmark == NULL) {
-		if ((c == '>' || c == '<')
-		 && quotef == 0
-		 && len <= 2
-		 && (*out == '\0' || is_digit(*out))) {
-			PARSEREDIR();
-			return lasttoken = TREDIR;
-		} else {
-			pungetc();
-		}
-	}
-	quoteflag = quotef;
-	backquotelist = bqlist;
-	grabstackblock(len);
-	wordtext = out;
-	if (dblquotep != NULL)
-	    ckfree(dblquotep);
-	return lasttoken = TWORD;
-/* end of readtoken routine */
-
-
-
-/*
- * Check to see whether we are at the end of the here document.  When this
- * is called, c is set to the first character of the next input line.  If
- * we are at the end of the here document, this routine sets the c to PEOF.
- */
-
-checkend: {
-	if (eofmark) {
-		if (striptabs) {
-			while (c == '\t')
-				c = pgetc();
-		}
-		if (c == *eofmark) {
-			if (pfgets(line, sizeof line) != NULL) {
-				char *p, *q;
-
-				p = line;
-				for (q = eofmark + 1 ; *q && *p == *q ; p++, q++);
-				if (*p == '\n' && *q == '\0') {
-					c = PEOF;
-					plinno++;
-					needprompt = doprompt;
-				} else {
-					pushstring(line, strlen(line), NULL);
-				}
-			}
-		}
-	}
-	goto checkend_return;
-}
-
-
-/*
- * Parse a redirection operator.  The variable "out" points to a string
- * specifying the fd to be redirected.  The variable "c" contains the
- * first character of the redirection operator.
- */
-
-parseredir: {
-	char fd = *out;
-	union node *np;
-
-	np = (union node *)stalloc(sizeof (struct nfile));
-	if (c == '>') {
-		np->nfile.fd = 1;
-		c = pgetc();
-		if (c == '>')
-			np->type = NAPPEND;
-		else if (c == '|')
-			np->type = NCLOBBER;
-		else if (c == '&')
-			np->type = NTOFD;
-		else {
-			np->type = NTO;
-			pungetc();
-		}
-	} else {	/* c == '<' */
-		np->nfile.fd = 0;
-		switch (c = pgetc()) {
-		case '<':
-			if (sizeof (struct nfile) != sizeof (struct nhere)) {
-				np = (union node *)stalloc(sizeof (struct nhere));
-				np->nfile.fd = 0;
-			}
-			np->type = NHERE;
-			heredoc = (struct heredoc *)stalloc(sizeof (struct heredoc));
-			heredoc->here = np;
-			if ((c = pgetc()) == '-') {
-				heredoc->striptabs = 1;
-			} else {
-				heredoc->striptabs = 0;
-				pungetc();
-			}
-			break;
-
-		case '&':
-			np->type = NFROMFD;
-			break;
-
-		case '>':
-			np->type = NFROMTO;
-			break;
-
-		default:
-			np->type = NFROM;
-			pungetc();
-			break;
-		}
-	}
-	if (fd != '\0')
-		np->nfile.fd = digit_val(fd);
-	redirnode = np;
-	goto parseredir_return;
-}
-
-
-/*
- * Parse a substitution.  At this point, we have read the dollar sign
- * and nothing else.
- */
-
-parsesub: {
-	int subtype;
-	int typeloc;
-	int flags;
-	char *p;
-	static const char types[] = "}-+?=";
-
-	c = pgetc();
-	if (c != '(' && c != OPENBRACE && !is_name(c) && !is_special(c)) {
-		USTPUTC('$', out);
-		pungetc();
-	} else if (c == '(') {	/* $(command) or $((arith)) */
-		if (pgetc() == '(') {
-			PARSEARITH();
-		} else {
-			pungetc();
-			PARSEBACKQNEW();
-		}
-	} else {
-		USTPUTC(CTLVAR, out);
-		typeloc = out - stackblock();
-		USTPUTC(VSNORMAL, out);
-		subtype = VSNORMAL;
-		if (c == OPENBRACE) {
-			c = pgetc();
-			if (c == '#') {
-				if ((c = pgetc()) == CLOSEBRACE)
-					c = '#';
-				else
-					subtype = VSLENGTH;
-			}
-			else
-				subtype = 0;
-		}
-		if (is_name(c)) {
-			do {
-				STPUTC(c, out);
-				c = pgetc();
-			} while (is_in_name(c));
-		} else if (is_digit(c)) {
-			do {
-				USTPUTC(c, out);
-				c = pgetc();
-			} while (is_digit(c));
-		}
-		else if (is_special(c)) {
-			USTPUTC(c, out);
-			c = pgetc();
-		}
-		else
-badsub:			synerror("Bad substitution");
-
-		STPUTC('=', out);
-		flags = 0;
-		if (subtype == 0) {
-			switch (c) {
-			case ':':
-				flags = VSNUL;
-				c = pgetc();
-				/*FALLTHROUGH*/
-			default:
-				p = strchr(types, c);
-				if (p == NULL)
-					goto badsub;
-				subtype = p - types + VSNORMAL;
-				break;
-			case '%':
-			case '#':
-				{
-					int cc = c;
-					subtype = c == '#' ? VSTRIMLEFT :
-							     VSTRIMRIGHT;
-					c = pgetc();
-					if (c == cc)
-						subtype++;
-					else
-						pungetc();
-					break;
-				}
-			}
-		} else {
-			pungetc();
-		}
-		if (ISDBLQUOTE() || arinest)
-			flags |= VSQUOTE;
-		*(stackblock() + typeloc) = subtype | flags;
-		if (subtype != VSNORMAL) {
-			varnest++;
-			if (varnest >= maxnest) {
-				dblquotep = ckrealloc(dblquotep, maxnest / 8);
-				dblquotep[(maxnest / 32) - 1] = 0;
-				maxnest += 32;
-			}
-		}
-	}
-	goto parsesub_return;
-}
-
-
-/*
- * Called to parse command substitutions.  Newstyle is set if the command
- * is enclosed inside $(...); nlpp is a pointer to the head of the linked
- * list of commands (passed by reference), and savelen is the number of
- * characters on the top of the stack which must be preserved.
- */
-
-parsebackq: {
-	struct nodelist **nlpp;
-	int savepbq;
-	union node *n;
-	char *volatile str;
-	struct jmploc jmploc;
-	struct jmploc *volatile savehandler;
-	int savelen;
-	int saveprompt;
-#ifdef __GNUC__
-	(void) &saveprompt;
-#endif
-
-	savepbq = parsebackquote;
-	if (setjmp(jmploc.loc)) {
-		if (str)
-			ckfree(str);
-		parsebackquote = 0;
-		handler = savehandler;
-		longjmp(handler->loc, 1);
-	}
-	INTOFF;
-	str = NULL;
-	savelen = out - stackblock();
-	if (savelen > 0) {
-		str = ckmalloc(savelen);
-		memcpy(str, stackblock(), savelen);
-	}
-	savehandler = handler;
-	handler = &jmploc;
-	INTON;
-        if (oldstyle) {
-                /* We must read until the closing backquote, giving special
-                   treatment to some slashes, and then push the string and
-                   reread it as input, interpreting it normally.  */
-                char *pout;
-                int pc;
-                int psavelen;
-                char *pstr;
-
-
-                STARTSTACKSTR(pout);
-		for (;;) {
-			if (needprompt) {
-				setprompt(2);
-				needprompt = 0;
-			}
-			switch (pc = pgetc()) {
-			case '`':
-				goto done;
-
-			case '\\':
-                                if ((pc = pgetc()) == '\n') {
-					plinno++;
-					if (doprompt)
-						setprompt(2);
-					else
-						setprompt(0);
-					/*
-					 * If eating a newline, avoid putting
-					 * the newline into the new character
-					 * stream (via the STPUTC after the
-					 * switch).
-					 */
-					continue;
-				}
-                                if (pc != '\\' && pc != '`' && pc != '$'
-                                    && (!ISDBLQUOTE() || pc != '"'))
-                                        STPUTC('\\', pout);
-				break;
-
-			case '\n':
-				plinno++;
-				needprompt = doprompt;
-				break;
-
-			case PEOF:
-			        startlinno = plinno;
-				synerror("EOF in backquote substitution");
- 				break;
-
-			default:
-				break;
-			}
-			STPUTC(pc, pout);
-                }
-done:
-                STPUTC('\0', pout);
-                psavelen = pout - stackblock();
-                if (psavelen > 0) {
-			pstr = grabstackstr(pout);
-			setinputstring(pstr, 1);
-                }
-        }
-	nlpp = &bqlist;
-	while (*nlpp)
-		nlpp = &(*nlpp)->next;
-	*nlpp = (struct nodelist *)stalloc(sizeof (struct nodelist));
-	(*nlpp)->next = NULL;
-	parsebackquote = oldstyle;
-
-	if (oldstyle) {
-		saveprompt = doprompt;
-		doprompt = 0;
-	}
-
-	n = list(0);
-
-	if (oldstyle)
-		doprompt = saveprompt;
-	else {
-		if (readtoken() != TRP)
-			synexpect(TRP);
-	}
-
-	(*nlpp)->n = n;
-        if (oldstyle) {
-		/*
-		 * Start reading from old file again, ignoring any pushed back
-		 * tokens left from the backquote parsing
-		 */
-                popfile();
-		tokpushback = 0;
-	}
-	while (stackblocksize() <= savelen)
-		growstackblock();
-	STARTSTACKSTR(out);
-	if (str) {
-		memcpy(out, str, savelen);
-		STADJUST(savelen, out);
-		INTOFF;
-		ckfree(str);
-		str = NULL;
-		INTON;
-	}
-	parsebackquote = savepbq;
-	handler = savehandler;
-	if (arinest || ISDBLQUOTE())
-		USTPUTC(CTLBACKQ | CTLQUOTE, out);
-	else
-		USTPUTC(CTLBACKQ, out);
-	if (oldstyle)
-		goto parsebackq_oldreturn;
-	else
-		goto parsebackq_newreturn;
-}
-
-/*
- * Parse an arithmetic expansion (indicate start of one and set state)
- */
-parsearith: {
-
-	if (++arinest == 1) {
-		prevsyntax = syntax;
-		syntax = ARISYNTAX;
-		USTPUTC(CTLARI, out);
-		if (ISDBLQUOTE())
-			USTPUTC('"',out);
-		else
-			USTPUTC(' ',out);
-	} else {
-		/*
-		 * we collapse embedded arithmetic expansion to
-		 * parenthesis, which should be equivalent
-		 */
-		USTPUTC('(', out);
-	}
-	goto parsearith_return;
-}
-
-} /* end of readtoken */
-
-
-
-#ifdef mkinit
-RESET {
-	tokpushback = 0;
-	checkkwd = 0;
-}
-#endif
-
-/*
- * Returns true if the text contains nothing to expand (no dollar signs
- * or backquotes).
- */
-
-STATIC int
-noexpand(char *text)
-{
-	char *p;
-	char c;
-
-	p = text;
-	while ((c = *p++) != '\0') {
-		if (c == CTLQUOTEMARK)
-			continue;
-		if (c == CTLESC)
-			p++;
-		else if (BASESYNTAX[(int)c] == CCTL)
-			return 0;
-	}
-	return 1;
-}
-
-
-/*
- * Return true if the argument is a legal variable name (a letter or
- * underscore followed by zero or more letters, underscores, and digits).
- */
-
-int
-goodname(char *name)
-	{
-	char *p;
-
-	p = name;
-	if (! is_name(*p))
-		return 0;
-	while (*++p) {
-		if (! is_in_name(*p))
-			return 0;
-	}
-	return 1;
-}
-
-
-/*
- * Called when an unexpected token is read during the parse.  The argument
- * is the token that is expected, or -1 if more than one type of token can
- * occur at this point.
- */
-
-STATIC void
-synexpect(int token)
-{
-	char msg[64];
-
-	if (token >= 0) {
-		fmtstr(msg, 64, "%s unexpected (expecting %s)",
-			tokname[lasttoken], tokname[token]);
-	} else {
-		fmtstr(msg, 64, "%s unexpected", tokname[lasttoken]);
-	}
-	synerror(msg);
-	/* NOTREACHED */
-}
-
-
-STATIC void
-synerror(const char *msg)
-{
-	if (commandname)
-		outfmt(&errout, "%s: %d: ", commandname, startlinno);
-	outfmt(&errout, "Syntax error: %s\n", msg);
-	error((char *)NULL);
-	/* NOTREACHED */
-}
-
-STATIC void
-setprompt(int which)
-{
-	whichprompt = which;
-
-#ifdef WITH_HISTORY
-	if (!el)
-#endif
-#ifdef WITH_LINENOISE
-        if (! in_interactive_mode() )
-#endif
-		out2str(getprompt(NULL));
-}
-
-/*
- * called by editline -- any expansions to the prompt
- *    should be added here.
- */
-const char *
-getprompt(void *unused)
-	{
-	switch (whichprompt) {
-	case 0:
-		return "";
-	case 1:
-		return ps1val();
-	case 2:
-		return ps2val();
-	default:
-		return "<internal prompt error>";
-	}
-}
diff --git a/sh/parser.h b/sh/parser.h
deleted file mode 100644
index b343c71..0000000
--- a/sh/parser.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*	$NetBSD: parser.h,v 1.17 2004/06/26 22:09:49 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)parser.h	8.3 (Berkeley) 5/4/95
- */
-
-/* control characters in argument strings */
-#define CTL_FIRST '\201'	/* first 'special' character */
-#define CTLESC '\201'		/* escape next character */
-#define CTLVAR '\202'		/* variable defn */
-#define CTLENDVAR '\203'
-#define CTLBACKQ '\204'
-#define CTLQUOTE 01		/* ored with CTLBACKQ code if in quotes */
-/*	CTLBACKQ | CTLQUOTE == '\205' */
-#define	CTLARI	'\206'		/* arithmetic expression */
-#define	CTLENDARI '\207'
-#define	CTLQUOTEMARK '\210'
-#define	CTLQUOTEEND '\211'	/* only inside ${...} */
-#define	CTL_LAST '\211'		/* last 'special' character */
-
-/* variable substitution byte (follows CTLVAR) */
-#define VSTYPE	0x0f		/* type of variable substitution */
-#define VSNUL	0x10		/* colon--treat the empty string as unset */
-#define VSQUOTE 0x80		/* inside double quotes--suppress splitting */
-
-/* values of VSTYPE field */
-#define VSNORMAL	0x1		/* normal variable:  $var or ${var} */
-#define VSMINUS		0x2		/* ${var-text} */
-#define VSPLUS		0x3		/* ${var+text} */
-#define VSQUESTION	0x4		/* ${var?message} */
-#define VSASSIGN	0x5		/* ${var=text} */
-#define VSTRIMLEFT	0x6		/* ${var#pattern} */
-#define VSTRIMLEFTMAX	0x7		/* ${var##pattern} */
-#define VSTRIMRIGHT	0x8		/* ${var%pattern} */
-#define VSTRIMRIGHTMAX 	0x9		/* ${var%%pattern} */
-#define VSLENGTH	0xa		/* ${#var} */
-
-
-/*
- * NEOF is returned by parsecmd when it encounters an end of file.  It
- * must be distinct from NULL, so we use the address of a variable that
- * happens to be handy.
- */
-extern int tokpushback;
-#define NEOF ((union node *)&tokpushback)
-extern int whichprompt;		/* 1 == PS1, 2 == PS2 */
-
-
-union node *parsecmd(int);
-void fixredir(union node *, const char *, int);
-int goodname(char *);
-const char *getprompt(void *);
diff --git a/sh/redir.c b/sh/redir.c
deleted file mode 100644
index 5c4c286..0000000
--- a/sh/redir.c
+++ /dev/null
@@ -1,389 +0,0 @@
-/*	$NetBSD: redir.c,v 1.29 2004/07/08 03:57:33 christos Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)redir.c	8.2 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: redir.c,v 1.29 2004/07/08 03:57:33 christos Exp $");
-#endif
-#endif /* not lint */
-
-#include <sys/types.h>
-#include <sys/param.h>	/* PIPE_BUF */
-#include <signal.h>
-#include <string.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-/*
- * Code for dealing with input/output redirection.
- */
-
-#include "main.h"
-#include "shell.h"
-#include "nodes.h"
-#include "jobs.h"
-#include "options.h"
-#include "expand.h"
-#include "redir.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-
-
-#define EMPTY -2		/* marks an unused slot in redirtab */
-#ifndef PIPE_BUF
-# define PIPESIZE 4096		/* amount of buffering in a pipe */
-#else
-# define PIPESIZE PIPE_BUF
-#endif
-
-#define signal bsd_signal
-
-MKINIT
-struct redirtab {
-	struct redirtab *next;
-	short renamed[10];
-};
-
-
-MKINIT struct redirtab *redirlist;
-
-/*
- * We keep track of whether or not fd0 has been redirected.  This is for
- * background commands, where we want to redirect fd0 to /dev/null only
- * if it hasn't already been redirected.
-*/
-int fd0_redirected = 0;
-
-STATIC void openredirect(union node *, char[10], int);
-STATIC int openhere(union node *);
-
-
-/*
- * Process a list of redirection commands.  If the REDIR_PUSH flag is set,
- * old file descriptors are stashed away so that the redirection can be
- * undone by calling popredir.  If the REDIR_BACKQ flag is set, then the
- * standard output, and the standard error if it becomes a duplicate of
- * stdout, is saved in memory.
- */
-
-void
-redirect(union node *redir, int flags)
-{
-	union node *n;
-	struct redirtab *sv = NULL;
-	int i;
-	int fd;
-	int try;
-	char memory[10];	/* file descriptors to write to memory */
-
-	for (i = 10 ; --i >= 0 ; )
-		memory[i] = 0;
-	memory[1] = flags & REDIR_BACKQ;
-	if (flags & REDIR_PUSH) {
-		/* We don't have to worry about REDIR_VFORK here, as
-		 * flags & REDIR_PUSH is never true if REDIR_VFORK is set.
-		 */
-		sv = ckmalloc(sizeof (struct redirtab));
-		for (i = 0 ; i < 10 ; i++)
-			sv->renamed[i] = EMPTY;
-		sv->next = redirlist;
-		redirlist = sv;
-	}
-	for (n = redir ; n ; n = n->nfile.next) {
-		fd = n->nfile.fd;
-		try = 0;
-		if ((n->nfile.type == NTOFD || n->nfile.type == NFROMFD) &&
-		    n->ndup.dupfd == fd)
-			continue; /* redirect from/to same file descriptor */
-
-		if ((flags & REDIR_PUSH) && sv->renamed[fd] == EMPTY) {
-			INTOFF;
-again:
-			if ((i = fcntl(fd, F_DUPFD, 10)) == -1) {
-				switch (errno) {
-				case EBADF:
-					if (!try) {
-						openredirect(n, memory, flags);
-						try++;
-						goto again;
-					}
-					/* FALLTHROUGH*/
-				default:
-					INTON;
-					error("%d: %s", fd, strerror(errno));
-					/* NOTREACHED */
-				}
-			}
-			if (!try) {
-				sv->renamed[fd] = i;
-				close(fd);
-			}
-			INTON;
-		} else {
-			close(fd);
-		}
-                if (fd == 0)
-                        fd0_redirected++;
-		if (!try)
-			openredirect(n, memory, flags);
-	}
-	if (memory[1])
-		out1 = &memout;
-	if (memory[2])
-		out2 = &memout;
-}
-
-
-STATIC void
-openredirect(union node *redir, char memory[10], int flags)
-{
-	int fd = redir->nfile.fd;
-	char *fname;
-	int f;
-	int oflags = O_WRONLY|O_CREAT|O_TRUNC, eflags;
-
-	/*
-	 * We suppress interrupts so that we won't leave open file
-	 * descriptors around.  This may not be such a good idea because
-	 * an open of a device or a fifo can block indefinitely.
-	 */
-	INTOFF;
-	memory[fd] = 0;
-	switch (redir->nfile.type) {
-	case NFROM:
-		fname = redir->nfile.expfname;
-		if (flags & REDIR_VFORK)
-			eflags = O_NONBLOCK;
-		else
-			eflags = 0;
-		if ((f = open(fname, O_RDONLY|eflags)) < 0)
-			goto eopen;
-		if (eflags)
-			(void)fcntl(f, F_SETFL, fcntl(f, F_GETFL, 0) & ~eflags);
-		break;
-	case NFROMTO:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_RDWR|O_CREAT|O_TRUNC, 0666)) < 0)
-			goto ecreate;
-		break;
-	case NTO:
-		if (Cflag)
-			oflags |= O_EXCL;
-		/* FALLTHROUGH */
-	case NCLOBBER:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, oflags, 0666)) < 0)
-			goto ecreate;
-		break;
-	case NAPPEND:
-		fname = redir->nfile.expfname;
-		if ((f = open(fname, O_WRONLY|O_CREAT|O_APPEND, 0666)) < 0)
-			goto ecreate;
-		break;
-	case NTOFD:
-	case NFROMFD:
-		if (redir->ndup.dupfd >= 0) {	/* if not ">&-" */
-			if (memory[redir->ndup.dupfd])
-				memory[fd] = 1;
-			else
-				copyfd(redir->ndup.dupfd, fd);
-		}
-		INTON;
-		return;
-	case NHERE:
-	case NXHERE:
-		f = openhere(redir);
-		break;
-	default:
-		abort();
-	}
-
-	if (f != fd) {
-		copyfd(f, fd);
-		close(f);
-	}
-	INTON;
-	return;
-ecreate:
-	error("cannot create %s: %s", fname, errmsg(errno, E_CREAT));
-eopen:
-	error("cannot open %s: %s", fname, errmsg(errno, E_OPEN));
-}
-
-
-/*
- * Handle here documents.  Normally we fork off a process to write the
- * data to a pipe.  If the document is short, we can stuff the data in
- * the pipe without forking.
- */
-
-STATIC int
-openhere(union node *redir)
-{
-	int pip[2];
-	int len = 0;
-
-	if (pipe(pip) < 0)
-		error("Pipe call failed");
-	if (redir->type == NHERE) {
-		len = strlen(redir->nhere.doc->narg.text);
-		if (len <= PIPESIZE) {
-			xwrite(pip[1], redir->nhere.doc->narg.text, len);
-			goto out;
-		}
-	}
-	if (forkshell((struct job *)NULL, (union node *)NULL, FORK_NOJOB) == 0) {
-		close(pip[0]);
-		signal(SIGINT, SIG_IGN);
-		signal(SIGQUIT, SIG_IGN);
-		signal(SIGHUP, SIG_IGN);
-#ifdef SIGTSTP
-		signal(SIGTSTP, SIG_IGN);
-#endif
-		signal(SIGPIPE, SIG_DFL);
-		if (redir->type == NHERE)
-			xwrite(pip[1], redir->nhere.doc->narg.text, len);
-		else
-			expandhere(redir->nhere.doc, pip[1]);
-		_exit(0);
-	}
-out:
-	close(pip[1]);
-	return pip[0];
-}
-
-
-
-/*
- * Undo the effects of the last redirection.
- */
-
-void
-popredir(void)
-{
-	struct redirtab *rp = redirlist;
-	int i;
-
-	for (i = 0 ; i < 10 ; i++) {
-		if (rp->renamed[i] != EMPTY) {
-                        if (i == 0)
-                                fd0_redirected--;
-			close(i);
-			if (rp->renamed[i] >= 0) {
-				copyfd(rp->renamed[i], i);
-				close(rp->renamed[i]);
-			}
-		}
-	}
-	INTOFF;
-	redirlist = rp->next;
-	ckfree(rp);
-	INTON;
-}
-
-/*
- * Undo all redirections.  Called on error or interrupt.
- */
-
-#ifdef mkinit
-
-INCLUDE "redir.h"
-
-RESET {
-	while (redirlist)
-		popredir();
-}
-
-SHELLPROC {
-	clearredir(0);
-}
-
-#endif
-
-/* Return true if fd 0 has already been redirected at least once.  */
-int
-fd0_redirected_p () {
-        return fd0_redirected != 0;
-}
-
-/*
- * Discard all saved file descriptors.
- */
-
-void
-clearredir(vforked)
-	int vforked;
-{
-	struct redirtab *rp;
-	int i;
-
-	for (rp = redirlist ; rp ; rp = rp->next) {
-		for (i = 0 ; i < 10 ; i++) {
-			if (rp->renamed[i] >= 0) {
-				close(rp->renamed[i]);
-			}
-			if (!vforked)
-				rp->renamed[i] = EMPTY;
-		}
-	}
-}
-
-
-
-/*
- * Copy a file descriptor to be >= to.  Returns -1
- * if the source file descriptor is closed, EMPTY if there are no unused
- * file descriptors left.
- */
-
-int
-copyfd(int from, int to)
-{
-	int newfd;
-
-	newfd = fcntl(from, F_DUPFD, to);
-	if (newfd < 0) {
-		if (errno == EMFILE)
-			return EMPTY;
-		else
-			error("%d: %s", from, strerror(errno));
-	}
-	return newfd;
-}
diff --git a/sh/redir.h b/sh/redir.h
deleted file mode 100644
index c9709e9..0000000
--- a/sh/redir.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*	$NetBSD: redir.h,v 1.15 2003/08/07 09:05:37 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)redir.h	8.2 (Berkeley) 5/4/95
- */
-
-/* flags passed to redirect */
-#define REDIR_PUSH 01		/* save previous values of file descriptors */
-#define REDIR_BACKQ 02		/* save the command output in memory */
-#define REDIR_VFORK 04		/* running under vfork(2), be careful */
-
-union node;
-void redirect(union node *, int);
-void popredir(void);
-int fd0_redirected_p(void);
-void clearredir(int);
-int copyfd(int, int);
-
diff --git a/sh/sh.1 b/sh/sh.1
deleted file mode 100644
index 3ef55b4..0000000
--- a/sh/sh.1
+++ /dev/null
@@ -1,1928 +0,0 @@
-.\"	$NetBSD: sh.1,v 1.78 2004/06/03 19:54:37 hubertf Exp $
-.\" Copyright (c) 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Kenneth Almquist.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)sh.1	8.6 (Berkeley) 5/4/95
-.\"
-.Dd April 17, 2004
-.Os
-.Dt SH 1
-.Sh NAME
-.Nm sh
-.Nd command interpreter (shell)
-.Sh SYNOPSIS
-.Nm
-.Bk -words
-.Op Fl aCefnuvxIimqVEb
-.Op Cm +aCefnuvxIimqVEb
-.Ek
-.Bk -words
-.Op Fl o Ar option_name
-.Op Cm +o Ar option_name
-.Ek
-.Bk -words
-.Op Ar command_file Oo Ar argument ... Oc
-.Ek
-.Nm
-.Fl c
-.Bk -words
-.Op Fl aCefnuvxIimqVEb
-.Op Cm +aCefnuvxIimqVEb
-.Ek
-.Bk -words
-.Op Fl o Ar option_name
-.Op Cm +o Ar option_name
-.Ek
-.Bk -words
-.Ar command_string
-.Op Ar command_name Oo Ar argument ... Oc
-.Ek
-.Nm
-.Fl s
-.Bk -words
-.Op Fl aCefnuvxIimqVEb
-.Op Cm +aCefnuvxIimqVEb
-.Ek
-.Bk -words
-.Op Fl o Ar option_name
-.Op Cm +o Ar option_name
-.Ek
-.Bk -words
-.Op Ar argument ...
-.Ek
-.Sh DESCRIPTION
-.Nm
-is the standard command interpreter for the system.
-The current version of
-.Nm
-is in the process of being changed to conform with the
-.Tn POSIX
-1003.2 and 1003.2a specifications for the shell.
-This version has many
-features which make it appear similar in some respects to the Korn shell,
-but it is not a Korn shell clone (see
-.Xr ksh 1 ) .
-Only features designated by
-.Tn POSIX ,
-plus a few Berkeley extensions, are being incorporated into this shell.
-.\" We expect
-.\" .Tn POSIX
-.\" conformance by the time 4.4 BSD is released.
-This man page is not intended
-to be a tutorial or a complete specification of the shell.
-.Ss Overview
-The shell is a command that reads lines from either a file or the
-terminal, interprets them, and generally executes other commands.
-It is the program that is running when a user logs into the system
-(although a user can select a different shell with the
-.Xr chsh 1
-command).
-The shell implements a language that has flow control
-constructs, a macro facility that provides a variety of features in
-addition to data storage, along with built in history and line editing
-capabilities.
-It incorporates many features to aid interactive use and
-has the advantage that the interpretative language is common to both
-interactive and non-interactive use (shell scripts).
-That is, commands
-can be typed directly to the running shell or can be put into a file and
-the file can be executed directly by the shell.
-.Ss Invocation
-If no args are present and if the standard input of the shell
-is connected to a terminal (or if the
-.Fl i
-flag is set),
-and the
-.Fl c
-option is not present, the shell is considered an interactive shell.
-An interactive shell generally prompts before each command and handles
-programming and command errors differently (as described below).
-When first starting,
-the shell inspects argument 0, and if it begins with a dash
-.Sq - ,
-the shell is also considered
-a login shell.
-This is normally done automatically by the system
-when the user first logs in.
-A login shell first reads commands
-from the files
-.Pa /etc/profile
-and
-.Pa .profile
-if they exist.
-If the environment variable
-.Ev ENV
-is set on entry to a shell, or is set in the
-.Pa .profile
-of a login shell, the shell next reads
-commands from the file named in
-.Ev ENV .
-Therefore, a user should place commands that are to be executed only at
-login time in the
-.Pa .profile
-file, and commands that are executed for every shell inside the
-.Ev ENV
-file.
-To set the
-.Ev ENV
-variable to some file, place the following line in your
-.Pa .profile
-of your home directory
-.Pp
-.Dl ENV=$HOME/.shinit; export ENV
-.Pp
-substituting for
-.Dq .shinit
-any filename you wish.
-Since the
-.Ev ENV
-file is read for every invocation of the shell, including shell scripts
-and non-interactive shells, the following paradigm is useful for
-restricting commands in the
-.Ev ENV
-file to interactive invocations.
-Place commands within the
-.Dq case
-and
-.Dq esac
-below (these commands are described later):
-.Pp
-.Bl -item -compact -offset indent
-.It
-.Li case $- in *i*)
-.Bl -item -compact -offset indent
-.It
-.Li # commands for interactive use only
-.It
-.Li ...
-.El
-.It
-.Li esac
-.El
-.Pp
-If command line arguments besides the options have been specified, then
-the shell treats the first argument as the name of a file from which to
-read commands (a shell script), and the remaining arguments are set as the
-positional parameters of the shell ($1, $2, etc).
-Otherwise, the shell
-reads commands from its standard input.
-.Ss Argument List Processing
-All of the single letter options have a corresponding name that can be
-used as an argument to the
-.Fl o
-option.
-The set
-.Fl o
-name is provided next to the single letter option in
-the description below.
-Specifying a dash
-.Dq -
-turns the option on, while using a plus
-.Dq +
-disables the option.
-The following options can be set from the command line or
-with the
-.Ic set
-builtin (described later).
-.Bl -tag -width aaaallexportfoo -offset indent
-.It Fl a Em allexport
-Export all variables assigned to.
-.It Fl c
-Read commands from the
-.Ar command_string
-operand instead of from the standard input.
-Special parameter 0 will be set from the
-.Ar command_name
-operand and the positional parameters ($1, $2, etc.)
-set from the remaining argument operands.
-.It Fl C Em noclobber
-Don't overwrite existing files with
-.Dq \*[Gt] .
-.It Fl e Em errexit
-If not interactive, exit immediately if any untested command fails.
-The exit status of a command is considered to be
-explicitly tested if the command is used to control an
-.Ic if ,
-.Ic elif ,
-.Ic while ,
-or
-.Ic until ;
-or if the command is the left hand operand of an
-.Dq \*[Am]\*[Am]
-or
-.Dq ||
-operator.
-.It Fl f Em noglob
-Disable pathname expansion.
-.It Fl n Em noexec
-If not interactive, read commands but do not execute them.
-This is useful for checking the syntax of shell scripts.
-.It Fl u Em nounset
-Write a message to standard error when attempting to expand a variable
-that is not set, and if the shell is not interactive, exit immediately.
-.It Fl v Em verbose
-The shell writes its input to standard error as it is read.
-Useful for debugging.
-.It Fl x Em xtrace
-Write each command to standard error (preceded by a
-.Sq +\  )
-before it is executed.
-Useful for debugging.
-.It Fl q Em quietprofile
-If the
-.Fl v
-or
-.Fl x
-options have been set, do not apply them when reading
-initialization files, these being
-.Pa /etc/profile ,
-.Pa .profile ,
-and the file specified by the
-.Ev ENV
-environment variable.
-.It Fl I Em ignoreeof
-Ignore EOF's from input when interactive.
-.It Fl i Em interactive
-Force the shell to behave interactively.
-.It Fl m Em monitor
-Turn on job control (set automatically when interactive).
-.It Fl s Em stdin
-Read commands from standard input (set automatically if no file arguments
-are present).
-This option has no effect when set after the shell has
-already started running (i.e. with
-.Ic set ) .
-.It Fl V Em vi
-Enable the built-in
-.Xr vi 1
-command line editor (disables
-.Fl E
-if it has been set).
-(See the
-.Sx Command Line Editing
-section below.)
-.It Fl E Em emacs
-Enable the built-in emacs style
-command line editor (disables
-.Fl V
-if it has been set).
-(See the
-.Sx Command Line Editing
-section below.)
-.It Fl b Em notify
-Enable asynchronous notification of background job completion.
-(UNIMPLEMENTED for 4.4alpha)
-.It "\ \ " Em cdprint
-Make an interactive shell always print the new directory name when
-changed by the
-.Ic cd
-command.
-.El
-.Ss Lexical Structure
-The shell reads input in terms of lines from a file and breaks it up into
-words at whitespace (blanks and tabs), and at certain sequences of
-characters that are special to the shell called
-.Dq operators .
-There are two types of operators: control operators and redirection
-operators (their meaning is discussed later).
-Following is a list of operators:
-.Bl -ohang -offset indent
-.It "Control operators:"
-.Dl \*[Am]  \*[Am]\*[Am]  \&(  \&)  \&;  ;; | || \*[Lt]newline\*[Gt]
-.It "Redirection operators:"
-.Dl \*[Lt]  \*[Gt]  \*[Gt]|  \*[Lt]\*[Lt]  \*[Gt]\*[Gt]  \*[Lt]\*[Am]  \*[Gt]\*[Am]  \*[Lt]\*[Lt]-  \*[Lt]\*[Gt]
-.El
-.Ss Quoting
-Quoting is used to remove the special meaning of certain characters or
-words to the shell, such as operators, whitespace, or keywords.
-There are three types of quoting: matched single quotes,
-matched double quotes, and backslash.
-.Ss Backslash
-A backslash preserves the literal meaning of the following
-character, with the exception of
-.Aq newline .
-A backslash preceding a
-.Aq newline
-is treated as a line continuation.
-.Ss Single Quotes
-Enclosing characters in single quotes preserves the literal meaning of all
-the characters (except single quotes, making it impossible to put
-single-quotes in a single-quoted string).
-.Ss Double Quotes
-Enclosing characters within double quotes preserves the literal
-meaning of all characters except dollarsign
-.Pq $ ,
-backquote
-.Pq ` ,
-and backslash
-.Pq \e .
-The backslash inside double quotes is historically weird, and serves to
-quote only the following characters:
-.Dl $  `  \*q  \e  \*[Lt]newline\*[Gt] .
-Otherwise it remains literal.
-.Ss Reserved Words
-Reserved words are words that have special meaning to the
-shell and are recognized at the beginning of a line and
-after a control operator.
-The following are reserved words:
-.Bl -column while while while while while -offset indent
-.It ! Ta elif Ta fi Ta while Ta case
-.It else Ta for Ta then Ta { Ta }
-.It do Ta done Ta until Ta if Ta esac
-.El
-.Pp
-Their meaning is discussed later.
-.Ss Aliases
-An alias is a name and corresponding value set using the
-.Ic alias
-builtin command.
-Whenever a reserved word may occur (see above),
-and after checking for reserved words, the shell
-checks the word to see if it matches an alias.
-If it does, it replaces it in the input stream with its value.
-For example, if there is an alias called
-.Dq lf
-with the value
-.Dq "ls -F" ,
-then the input:
-.Pp
-.Dl lf foobar Aq return
-.Pp
-would become
-.Pp
-.Dl ls -F foobar Aq return
-.Pp
-Aliases provide a convenient way for naive users to create shorthands for
-commands without having to learn how to create functions with arguments.
-They can also be used to create lexically obscure code.
-This use is discouraged.
-.Ss Commands
-The shell interprets the words it reads according to a language, the
-specification of which is outside the scope of this man page (refer to the
-BNF in the
-.Tn POSIX
-1003.2 document).
-Essentially though, a line is read and if the first
-word of the line (or after a control operator) is not a reserved word,
-then the shell has recognized a simple command.
-Otherwise, a complex
-command or some other special construct may have been recognized.
-.Ss Simple Commands
-If a simple command has been recognized, the shell performs
-the following actions:
-.Bl -enum -offset indent
-.It
-Leading words of the form
-.Dq name=value
-are stripped off and assigned to the environment of the simple command.
-Redirection operators and their arguments (as described below) are
-stripped off and saved for processing.
-.It
-The remaining words are expanded as described in
-the section called
-.Dq Expansions ,
-and the first remaining word is considered the command name and the
-command is located.
-The remaining words are considered the arguments of the command.
-If no command name resulted, then the
-.Dq name=value
-variable assignments recognized in item 1 affect the current shell.
-.It
-Redirections are performed as described in the next section.
-.El
-.Ss Redirections
-Redirections are used to change where a command reads its input or sends
-its output.
-In general, redirections open, close, or duplicate an
-existing reference to a file.
-The overall format used for redirection is:
-.Pp
-.Dl [n] Va redir-op Ar file
-.Pp
-where
-.Va redir-op
-is one of the redirection operators mentioned previously.
-Following is a list of the possible redirections.
-The
-.Bq n
-is an optional number, as in
-.Sq 3
-(not
-.Sq Bq 3 ) ,
-that refers to a file descriptor.
-.Bl -tag -width aaabsfiles -offset indent
-.It [n] Ns \*[Gt] file
-Redirect standard output (or n) to file.
-.It [n] Ns \*[Gt]| file
-Same, but override the
-.Fl C
-option.
-.It [n] Ns \*[Gt]\*[Gt] file
-Append standard output (or n) to file.
-.It [n] Ns \*[Lt] file
-Redirect standard input (or n) from file.
-.It [n1] Ns \*[Lt]\*[Am] Ns n2
-Duplicate standard input (or n1) from file descriptor n2.
-.It [n] Ns \*[Lt]\*[Am]-
-Close standard input (or n).
-.It [n1] Ns \*[Gt]\*[Am] Ns n2
-Duplicate standard output (or n1) to n2.
-.It [n] Ns \*[Gt]\*[Am]-
-Close standard output (or n).
-.It [n] Ns \*[Lt]\*[Gt] file
-Open file for reading and writing on standard input (or n).
-.El
-.Pp
-The following redirection is often called a
-.Dq here-document .
-.Bl -item -offset indent
-.It
-.Li [n]\*[Lt]\*[Lt] delimiter
-.Dl here-doc-text ...
-.Li delimiter
-.El
-.Pp
-All the text on successive lines up to the delimiter is saved away and
-made available to the command on standard input, or file descriptor n if
-it is specified.
-If the delimiter as specified on the initial line is
-quoted, then the here-doc-text is treated literally, otherwise the text is
-subjected to parameter expansion, command substitution, and arithmetic
-expansion (as described in the section on
-.Dq Expansions ) .
-If the operator is
-.Dq \*[Lt]\*[Lt]-
-instead of
-.Dq \*[Lt]\*[Lt] ,
-then leading tabs in the here-doc-text are stripped.
-.Ss Search and Execution
-There are three types of commands: shell functions, builtin commands, and
-normal programs -- and the command is searched for (by name) in that order.
-They each are executed in a different way.
-.Pp
-When a shell function is executed, all of the shell positional parameters
-(except $0, which remains unchanged) are set to the arguments of the shell
-function.
-The variables which are explicitly placed in the environment of
-the command (by placing assignments to them before the function name) are
-made local to the function and are set to the values given.
-Then the command given in the function definition is executed.
-The positional parameters are restored to their original values
-when the command completes.
-This all occurs within the current shell.
-.Pp
-Shell builtins are executed internally to the shell, without spawning a
-new process.
-.Pp
-Otherwise, if the command name doesn't match a function or builtin, the
-command is searched for as a normal program in the file system (as
-described in the next section).
-When a normal program is executed, the shell runs the program,
-passing the arguments and the environment to the program.
-If the program is not a normal executable file (i.e., if it does
-not begin with the "magic number" whose
-.Tn ASCII
-representation is "#!", so
-.Xr execve 2
-returns
-.Er ENOEXEC
-then) the shell will interpret the program in a subshell.
-The child shell will reinitialize itself in this case,
-so that the effect will be as if a
-new shell had been invoked to handle the ad-hoc shell script, except that
-the location of hashed commands located in the parent shell will be
-remembered by the child.
-.Pp
-Note that previous versions of this document and the source code itself
-misleadingly and sporadically refer to a shell script without a magic
-number as a "shell procedure".
-.Ss Path Search
-When locating a command, the shell first looks to see if it has a shell
-function by that name.
-Then it looks for a builtin command by that name.
-If a builtin command is not found, one of two things happen:
-.Bl -enum
-.It
-Command names containing a slash are simply executed without performing
-any searches.
-.It
-The shell searches each entry in
-.Ev PATH
-in turn for the command.
-The value of the
-.Ev PATH
-variable should be a series of entries separated by colons.
-Each entry consists of a directory name.
-The current directory may be indicated
-implicitly by an empty directory name, or explicitly by a single period.
-.El
-.Ss Command Exit Status
-Each command has an exit status that can influence the behavior
-of other shell commands.
-The paradigm is that a command exits
-with zero for normal or success, and non-zero for failure,
-error, or a false indication.
-The man page for each command
-should indicate the various exit codes and what they mean.
-Additionally, the builtin commands return exit codes, as does
-an executed shell function.
-.Pp
-If a command consists entirely of variable assignments then the
-exit status of the command is that of the last command substitution
-if any, otherwise 0.
-.Ss Complex Commands
-Complex commands are combinations of simple commands with control
-operators or reserved words, together creating a larger complex command.
-More generally, a command is one of the following:
-.Bl -bullet
-.It
-simple command
-.It
-pipeline
-.It
-list or compound-list
-.It
-compound command
-.It
-function definition
-.El
-.Pp
-Unless otherwise stated, the exit status of a command is that of the last
-simple command executed by the command.
-.Ss Pipelines
-A pipeline is a sequence of one or more commands separated
-by the control operator |.
-The standard output of all but
-the last command is connected to the standard input
-of the next command.
-The standard output of the last
-command is inherited from the shell, as usual.
-.Pp
-The format for a pipeline is:
-.Pp
-.Dl [!] command1 [ | command2 ...]
-.Pp
-The standard output of command1 is connected to the standard input of
-command2.
-The standard input, standard output, or both of a command is
-considered to be assigned by the pipeline before any redirection specified
-by redirection operators that are part of the command.
-.Pp
-If the pipeline is not in the background (discussed later), the shell
-waits for all commands to complete.
-.Pp
-If the reserved word ! does not precede the pipeline, the exit status is
-the exit status of the last command specified in the pipeline.
-Otherwise, the exit status is the logical NOT of the exit status of the
-last command.
-That is, if the last command returns zero, the exit status
-is 1; if the last command returns greater than zero, the exit status is
-zero.
-.Pp
-Because pipeline assignment of standard input or standard output or both
-takes place before redirection, it can be modified by redirection.
-For example:
-.Pp
-.Dl $ command1 2\*[Gt]\*[Am]1 | command2
-.Pp
-sends both the standard output and standard error of command1
-to the standard input of command2.
-.Pp
-A ; or
-.Aq newline
-terminator causes the preceding AND-OR-list (described
-next) to be executed sequentially; a \*[Am] causes asynchronous execution of
-the preceding AND-OR-list.
-.Pp
-Note that unlike some other shells, each process in the pipeline is a
-child of the invoking shell (unless it is a shell builtin, in which case
-it executes in the current shell -- but any effect it has on the
-environment is wiped).
-.Ss Background Commands -- \*[Am]
-If a command is terminated by the control operator ampersand (\*[Am]), the
-shell executes the command asynchronously -- that is, the shell does not
-wait for the command to finish before executing the next command.
-.Pp
-The format for running a command in background is:
-.Pp
-.Dl command1 \*[Am] [command2 \*[Am] ...]
-.Pp
-If the shell is not interactive, the standard input of an asynchronous
-command is set to
-.Pa /dev/null .
-.Ss Lists -- Generally Speaking
-A list is a sequence of zero or more commands separated by newlines,
-semicolons, or ampersands, and optionally terminated by one of these three
-characters.
-The commands in a list are executed in the order they are written.
-If command is followed by an ampersand, the shell starts the
-command and immediately proceed onto the next command; otherwise it waits
-for the command to terminate before proceeding to the next one.
-.Ss Short-Circuit List Operators
-.Dq \*[Am]\*[Am]
-and
-.Dq ||
-are AND-OR list operators.
-.Dq \*[Am]\*[Am]
-executes the first command, and then executes the second command if and only
-if the exit status of the first command is zero.
-.Dq ||
-is similar, but executes the second command if and only if the exit status
-of the first command is nonzero.
-.Dq \*[Am]\*[Am]
-and
-.Dq ||
-both have the same priority.
-Note that these operators are left-associative, so
-.Dq true || echo bar && echo baz
-writes
-.Dq baz
-and nothing else.
-This is not the way it works in C.
-.Ss Flow-Control Constructs -- if, while, for, case
-The syntax of the if command is
-.Bd -literal -offset indent
-if list
-then list
-[ elif list
-then    list ] ...
-[ else list ]
-fi
-.Ed
-.Pp
-The syntax of the while command is
-.Bd -literal -offset indent
-while list
-do   list
-done
-.Ed
-.Pp
-The two lists are executed repeatedly while the exit status of the
-first list is zero.
-The until command is similar, but has the word
-until in place of while, which causes it to
-repeat until the exit status of the first list is zero.
-.Pp
-The syntax of the for command is
-.Bd -literal -offset indent
-for variable in word ...
-do   list
-done
-.Ed
-.Pp
-The words are expanded, and then the list is executed repeatedly with the
-variable set to each word in turn.
-do and done may be replaced with
-.Dq {
-and
-.Dq } .
-.Pp
-The syntax of the break and continue command is
-.Bd -literal -offset indent
-break [ num ]
-continue [ num ]
-.Ed
-.Pp
-Break terminates the num innermost for or while loops.
-Continue continues with the next iteration of the innermost loop.
-These are implemented as builtin commands.
-.Pp
-The syntax of the case command is
-.Bd -literal -offset indent
-case word in
-pattern) list ;;
-\&...
-esac
-.Ed
-.Pp
-The pattern can actually be one or more patterns (see
-.Sx Shell Patterns
-described later), separated by
-.Dq \*(Ba
-characters.
-.Ss Grouping Commands Together
-Commands may be grouped by writing either
-.Pp
-.Dl (list)
-.Pp
-or
-.Pp
-.Dl { list; }
-.Pp
-The first of these executes the commands in a subshell.
-Builtin commands grouped into a (list) will not affect the current shell.
-The second form does not fork another shell so is slightly more efficient.
-Grouping commands together this way allows you to redirect
-their output as though they were one program:
-.Pp
-.Bd -literal -offset indent
-{ echo -n \*q hello \*q ; echo \*q world" ; } \*[Gt] greeting
-.Ed
-.Pp
-Note that
-.Dq }
-must follow a control operator (here,
-.Dq \&; )
-so that it is recognized as a reserved word and not as another command argument.
-.Ss Functions
-The syntax of a function definition is
-.Pp
-.Dl name ( ) command
-.Pp
-A function definition is an executable statement; when executed it
-installs a function named name and returns an exit status of zero.
-The command is normally a list enclosed between
-.Dq {
-and
-.Dq } .
-.Pp
-Variables may be declared to be local to a function by using a local
-command.
-This should appear as the first statement of a function, and the syntax is
-.Pp
-.Dl local [ variable | - ] ...
-.Pp
-Local is implemented as a builtin command.
-.Pp
-When a variable is made local, it inherits the initial value and exported
-and readonly flags from the variable with the same name in the surrounding
-scope, if there is one.
-Otherwise, the variable is initially unset.
-The shell uses dynamic scoping, so that if you make the variable x local to
-function f, which then calls function g, references to the variable x made
-inside g will refer to the variable x declared inside f, not to the global
-variable named x.
-.Pp
-The only special parameter that can be made local is
-.Dq - .
-Making
-.Dq -
-local any shell options that are changed via the set command inside the
-function to be restored to their original values when the function
-returns.
-.Pp
-The syntax of the return command is
-.Pp
-.Dl return [ exitstatus ]
-.Pp
-It terminates the currently executing function.
-Return is implemented as a builtin command.
-.Ss Variables and Parameters
-The shell maintains a set of parameters.
-A parameter denoted by a name is called a variable.
-When starting up, the shell turns all the environment
-variables into shell variables.
-New variables can be set using the form
-.Pp
-.Dl name=value
-.Pp
-Variables set by the user must have a name consisting solely of
-alphabetics, numerics, and underscores - the first of which must not be
-numeric.
-A parameter can also be denoted by a number or a special
-character as explained below.
-.Ss Positional Parameters
-A positional parameter is a parameter denoted by a number (n \*[Gt] 0).
-The shell sets these initially to the values of its command line arguments
-that follow the name of the shell script.
-The
-.Ic set
-builtin can also be used to set or reset them.
-.Ss Special Parameters
-A special parameter is a parameter denoted by one of the following special
-characters.
-The value of the parameter is listed next to its character.
-.Bl -tag -width thinhyphena
-.It *
-Expands to the positional parameters, starting from one.
-When the
-expansion occurs within a double-quoted string it expands to a single
-field with the value of each parameter separated by the first character of
-the
-.Ev IFS
-variable, or by a
-.Aq space
-if
-.Ev IFS
-is unset.
-.It @
-Expands to the positional parameters, starting from one.
-When the expansion occurs within double-quotes, each positional
-parameter expands as a separate argument.
-If there are no positional parameters, the
-expansion of @ generates zero arguments, even when @ is
-double-quoted.
-What this basically means, for example, is
-if $1 is
-.Dq abc
-and $2 is
-.Dq def ghi ,
-then
-.Qq $@
-expands to
-the two arguments:
-.Pp
-.Sm off
-.Dl \*q abc \*q \  \*q def\ ghi \*q
-.Sm on
-.It #
-Expands to the number of positional parameters.
-.It \&?
-Expands to the exit status of the most recent pipeline.
-.It - (Hyphen.)
-Expands to the current option flags (the single-letter
-option names concatenated into a string) as specified on
-invocation, by the set builtin command, or implicitly
-by the shell.
-.It $
-Expands to the process ID of the invoked shell.
-A subshell retains the same value of $ as its parent.
-.It \&!
-Expands to the process ID of the most recent background
-command executed from the current shell.
-For a pipeline, the process ID is that of the last command in the pipeline.
-.It 0 (Zero.)
-Expands to the name of the shell or shell script.
-.El
-.Ss Word Expansions
-This clause describes the various expansions that are performed on words.
-Not all expansions are performed on every word, as explained later.
-.Pp
-Tilde expansions, parameter expansions, command substitutions, arithmetic
-expansions, and quote removals that occur within a single word expand to a
-single field.
-It is only field splitting or pathname expansion that can
-create multiple fields from a single word.
-The single exception to this
-rule is the expansion of the special parameter @ within double-quotes, as
-was described above.
-.Pp
-The order of word expansion is:
-.Bl -enum
-.It
-Tilde Expansion, Parameter Expansion, Command Substitution,
-Arithmetic Expansion (these all occur at the same time).
-.It
-Field Splitting is performed on fields
-generated by step (1) unless the
-.Ev IFS
-variable is null.
-.It
-Pathname Expansion (unless set
-.Fl f
-is in effect).
-.It
-Quote Removal.
-.El
-.Pp
-The $ character is used to introduce parameter expansion, command
-substitution, or arithmetic evaluation.
-.Ss Tilde Expansion (substituting a user's home directory)
-A word beginning with an unquoted tilde character (~) is
-subjected to tilde expansion.
-All the characters up to
-a slash (/) or the end of the word are treated as a username
-and are replaced with the user's home directory.
-If the username is missing (as in
-.Pa ~/foobar ) ,
-the tilde is replaced with the value of the
-.Va HOME
-variable (the current user's home directory).
-.Ss Parameter Expansion
-The format for parameter expansion is as follows:
-.Pp
-.Dl ${expression}
-.Pp
-where expression consists of all characters until the matching
-.Dq } .
-Any
-.Dq }
-escaped by a backslash or within a quoted string, and characters in
-embedded arithmetic expansions, command substitutions, and variable
-expansions, are not examined in determining the matching
-.Dq } .
-.Pp
-The simplest form for parameter expansion is:
-.Pp
-.Dl ${parameter}
-.Pp
-The value, if any, of parameter is substituted.
-.Pp
-The parameter name or symbol can be enclosed in braces, which are
-optional except for positional parameters with more than one digit or
-when parameter is followed by a character that could be interpreted as
-part of the name.
-If a parameter expansion occurs inside double-quotes:
-.Bl -enum
-.It
-Pathname expansion is not performed on the results of the expansion.
-.It
-Field splitting is not performed on the results of the
-expansion, with the exception of @.
-.El
-.Pp
-In addition, a parameter expansion can be modified by using one of the
-following formats.
-.Bl -tag -width aaparameterwordaaaaa
-.It ${parameter:-word}
-Use Default Values.
-If parameter is unset or null, the expansion of word
-is substituted; otherwise, the value of parameter is substituted.
-.It ${parameter:=word}
-Assign Default Values.
-If parameter is unset or null, the expansion of
-word is assigned to parameter.
-In all cases, the final value of parameter is substituted.
-Only variables, not positional parameters or special
-parameters, can be assigned in this way.
-.It ${parameter:?[word]}
-Indicate Error if Null or Unset.
-If parameter is unset or null, the
-expansion of word (or a message indicating it is unset if word is omitted)
-is written to standard error and the shell exits with a nonzero exit status.
-Otherwise, the value of parameter is substituted.
-An interactive shell need not exit.
-.It ${parameter:+word}
-Use Alternative Value.
-If parameter is unset or null, null is
-substituted; otherwise, the expansion of word is substituted.
-.El
-.Pp
-In the parameter expansions shown previously, use of the colon in the
-format results in a test for a parameter that is unset or null; omission
-of the colon results in a test for a parameter that is only unset.
-.Bl -tag -width aaparameterwordaaaaa
-.It ${#parameter}
-String Length.
-The length in characters of the value of parameter.
-.El
-.Pp
-The following four varieties of parameter expansion provide for substring
-processing.
-In each case, pattern matching notation (see
-.Sx Shell Patterns ) ,
-rather than regular expression notation, is used to evaluate the patterns.
-If parameter is * or @, the result of the expansion is unspecified.
-Enclosing the full parameter expansion string in double-quotes does not
-cause the following four varieties of pattern characters to be quoted,
-whereas quoting characters within the braces has this effect.
-.Bl -tag -width aaparameterwordaaaaa
-.It ${parameter%word}
-Remove Smallest Suffix Pattern.
-The word is expanded to produce a pattern.
-The parameter expansion then results in parameter, with the
-smallest portion of the suffix matched by the pattern deleted.
-.It ${parameter%%word}
-Remove Largest Suffix Pattern.
-The word is expanded to produce a pattern.
-The parameter expansion then results in parameter, with the largest
-portion of the suffix matched by the pattern deleted.
-.It ${parameter#word}
-Remove Smallest Prefix Pattern.
-The word is expanded to produce a pattern.
-The parameter expansion then results in parameter, with the
-smallest portion of the prefix matched by the pattern deleted.
-.It ${parameter##word}
-Remove Largest Prefix Pattern.
-The word is expanded to produce a pattern.
-The parameter expansion then results in parameter, with the largest
-portion of the prefix matched by the pattern deleted.
-.El
-.Ss Command Substitution
-Command substitution allows the output of a command to be substituted in
-place of the command name itself.
-Command substitution occurs when the command is enclosed as follows:
-.Pp
-.Dl $(command)
-.Pp
-or
-.Po
-.Dq backquoted
-version
-.Pc :
-.Pp
-.Dl `command`
-.Pp
-The shell expands the command substitution by executing command in a
-subshell environment and replacing the command substitution with the
-standard output of the command, removing sequences of one or more
-.Ao newline Ac Ns s
-at the end of the substitution.
-(Embedded
-.Ao newline Ac Ns s
-before
-the end of the output are not removed; however, during field splitting,
-they may be translated into
-.Ao space Ac Ns s ,
-depending on the value of
-.Ev IFS
-and quoting that is in effect.)
-.Ss Arithmetic Expansion
-Arithmetic expansion provides a mechanism for evaluating an arithmetic
-expression and substituting its value.
-The format for arithmetic expansion is as follows:
-.Pp
-.Dl $((expression))
-.Pp
-The expression is treated as if it were in double-quotes, except
-that a double-quote inside the expression is not treated specially.
-The shell expands all tokens in the expression for parameter expansion,
-command substitution, and quote removal.
-.Pp
-Next, the shell treats this as an arithmetic expression and
-substitutes the value of the expression.
-.Ss White Space Splitting (Field Splitting)
-After parameter expansion, command substitution, and
-arithmetic expansion the shell scans the results of
-expansions and substitutions that did not occur in double-quotes for
-field splitting and multiple fields can result.
-.Pp
-The shell treats each character of the
-.Ev IFS
-as a delimiter and use the delimiters to split the results of parameter
-expansion and command substitution into fields.
-.Ss Pathname Expansion (File Name Generation)
-Unless the
-.Fl f
-flag is set, file name generation is performed after word splitting is
-complete.
-Each word is viewed as a series of patterns, separated by slashes.
-The process of expansion replaces the word with the names of all
-existing files whose names can be formed by replacing each pattern with a
-string that matches the specified pattern.
-There are two restrictions on
-this: first, a pattern cannot match a string containing a slash, and
-second, a pattern cannot match a string starting with a period unless the
-first character of the pattern is a period.
-The next section describes the
-patterns used for both Pathname Expansion and the
-.Ic case
-command.
-.Ss Shell Patterns
-A pattern consists of normal characters, which match themselves,
-and meta-characters.
-The meta-characters are
-.Dq \&! ,
-.Dq * ,
-.Dq \&? ,
-and
-.Dq \&[ .
-These characters lose their special meanings if they are quoted.
-When command or variable substitution is performed
-and the dollar sign or back quotes are not double quoted,
-the value of the variable or the output of
-the command is scanned for these characters and they are turned into
-meta-characters.
-.Pp
-An asterisk
-.Pq Dq *
-matches any string of characters.
-A question mark matches any single character.
-A left bracket
-.Pq Dq \&[
-introduces a character class.
-The end of the character class is indicated by a
-.Pq Dq \&] ;
-if the
-.Dq \&]
-is missing then the
-.Dq \&[
-matches a
-.Dq \&[
-rather than introducing a character class.
-A character class matches any of the characters between the square brackets.
-A range of characters may be specified using a minus sign.
-The character class may be complemented
-by making an exclamation point the first character of the character class.
-.Pp
-To include a
-.Dq \&]
-in a character class, make it the first character listed (after the
-.Dq \&! ,
-if any).
-To include a minus sign, make it the first or last character listed.
-.Ss Builtins
-This section lists the builtin commands which are builtin because they
-need to perform some operation that can't be performed by a separate
-process.
-In addition to these, there are several other commands that may
-be builtin for efficiency (e.g.
-.Xr printf 1 ,
-.Xr echo 1 ,
-.Xr test 1 ,
-etc).
-.Bl -tag -width 5n
-.It :
-A null command that returns a 0 (true) exit value.
-.It \&. file
-The commands in the specified file are read and executed by the shell.
-.It alias Op Ar name Ns Op Ar "=string ..."
-If
-.Ar name=string
-is specified, the shell defines the alias
-.Ar name
-with value
-.Ar string .
-If just
-.Ar name
-is specified, the value of the alias
-.Ar name
-is printed.
-With no arguments, the
-.Ic alias
-builtin prints the
-names and values of all defined aliases (see
-.Ic unalias ) .
-.It bg [ Ar job ] ...
-Continue the specified jobs (or the current job if no
-jobs are given) in the background.
-.It Xo command
-.Op Fl p
-.Op Fl v
-.Op Fl V
-.Ar command
-.Op Ar arg ...
-.Xc
-Execute the specified command but ignore shell functions when searching
-for it.
-(This is useful when you
-have a shell function with the same name as a builtin command.)
-.Bl -tag -width 5n
-.It Fl p
-search for command using a
-.Ev PATH
-that guarantees to find all the standard utilities.
-.It Fl V
-Do not execute the command but
-search for the command and print the resolution of the
-command search.
-This is the same as the type builtin.
-.It Fl v
-Do not execute the command but
-search for the command and print the absolute pathname
-of utilities, the name for builtins or the expansion of aliases.
-.El
-.It cd Op Ar directory Op Ar replace
-Switch to the specified directory (default
-.Ev $HOME ) .
-If
-.Ar replace
-is specified, then the new directory name is generated by replacing
-the first occurrence of
-.Ar directory
-in the current directory name with
-.Ar replace .
-Otherwise if an entry for
-.Ev CDPATH
-appears in the environment of the
-.Ic cd
-command or the shell variable
-.Ev CDPATH
-is set and the directory name does not begin with a slash, then the
-directories listed in
-.Ev CDPATH
-will be searched for the specified directory.
-The format of
-.Ev CDPATH
-is the same as that of
-.Ev PATH .
-In an interactive shell, the
-.Ic cd
-command will print out the name of the
-directory that it actually switched to if this is different from the name
-that the user gave.
-These may be different either because the
-.Ev CDPATH
-mechanism was used or because a symbolic link was crossed.
-.It eval Ar string ...
-Concatenate all the arguments with spaces.
-Then re-parse and execute the command.
-.It exec Op Ar command arg ...
-Unless command is omitted, the shell process is replaced with the
-specified program (which must be a real program, not a shell builtin or
-function).
-Any redirections on the
-.Ic exec
-command are marked as permanent, so that they are not undone when the
-.Ic exec
-command finishes.
-.It exit Op Ar exitstatus
-Terminate the shell process.
-If
-.Ar exitstatus
-is given it is used as the exit status of the shell; otherwise the
-exit status of the preceding command is used.
-.It export Ar name ...
-.It export Fl p
-The specified names are exported so that they will appear in the
-environment of subsequent commands.
-The only way to un-export a variable is to unset it.
-The shell allows the value of a variable to be set at the
-same time it is exported by writing
-.Pp
-.Dl export name=value
-.Pp
-With no arguments the export command lists the names of all exported variables.
-With the
-.Fl p
-option specified the output will be formatted suitably for non-interactive use.
-.It Xo fc Op Fl e Ar editor
-.Op Ar first Op Ar last
-.Xc
-.It Xo fc Fl l
-.Op Fl nr
-.Op Ar first Op Ar last
-.Xc
-.It Xo fc Fl s Op Ar old=new
-.Op Ar first
-.Xc
-The
-.Ic fc
-builtin lists, or edits and re-executes, commands previously entered
-to an interactive shell.
-.Bl -tag -width 5n
-.It Fl e No editor
-Use the editor named by editor to edit the commands.
-The editor string is a command name, subject to search via the
-.Ev PATH
-variable.
-The value in the
-.Ev FCEDIT
-variable is used as a default when
-.Fl e
-is not specified.
-If
-.Ev FCEDIT
-is null or unset, the value of the
-.Ev EDITOR
-variable is used.
-If
-.Ev EDITOR
-is null or unset,
-.Xr ed 1
-is used as the editor.
-.It Fl l No (ell)
-List the commands rather than invoking an editor on them.
-The commands are written in the sequence indicated by
-the first and last operands, as affected by
-.Fl r ,
-with each command preceded by the command number.
-.It Fl n
-Suppress command numbers when listing with -l.
-.It Fl r
-Reverse the order of the commands listed (with
-.Fl l )
-or edited (with neither
-.Fl l
-nor
-.Fl s ) .
-.It Fl s
-Re-execute the command without invoking an editor.
-.It first
-.It last
-Select the commands to list or edit.
-The number of previous commands that
-can be accessed are determined by the value of the
-.Ev HISTSIZE
-variable.
-The value of first or last or both are one of the following:
-.Bl -tag -width 5n
-.It [+]number
-A positive number representing a command number; command numbers can be
-displayed with the
-.Fl l
-option.
-.It Fl number
-A negative decimal number representing the command that was executed
-number of commands previously.
-For example, \-1 is the immediately previous command.
-.El
-.It string
-A string indicating the most recently entered command that begins with
-that string.
-If the old=new operand is not also specified with
-.Fl s ,
-the string form of the first operand cannot contain an embedded equal sign.
-.El
-.Pp
-The following environment variables affect the execution of fc:
-.Bl -tag -width HISTSIZE
-.It Ev FCEDIT
-Name of the editor to use.
-.It Ev HISTSIZE
-The number of previous commands that are accessible.
-.El
-.It fg Op Ar job
-Move the specified job or the current job to the foreground.
-.It getopts Ar optstring var
-The
-.Tn POSIX
-.Ic getopts
-command, not to be confused with the
-.Em Bell Labs
--derived
-.Xr getopt 1 .
-.Pp
-The first argument should be a series of letters, each of which may be
-optionally followed by a colon to indicate that the option requires an
-argument.
-The variable specified is set to the parsed option.
-.Pp
-The
-.Ic getopts
-command deprecates the older
-.Xr getopt 1
-utility due to its handling of arguments containing whitespace.
-.Pp
-The
-.Ic getopts
-builtin may be used to obtain options and their arguments
-from a list of parameters.
-When invoked,
-.Ic getopts
-places the value of the next option from the option string in the list in
-the shell variable specified by
-.Va var
-and its index in the shell variable
-.Ev OPTIND .
-When the shell is invoked,
-.Ev OPTIND
-is initialized to 1.
-For each option that requires an argument, the
-.Ic getopts
-builtin will place it in the shell variable
-.Ev OPTARG .
-If an option is not allowed for in the
-.Va optstring ,
-then
-.Ev OPTARG
-will be unset.
-.Pp
-.Va optstring
-is a string of recognized option letters (see
-.Xr getopt 3 ) .
-If a letter is followed by a colon, the option is expected to have an
-argument which may or may not be separated from it by white space.
-If an option character is not found where expected,
-.Ic getopts
-will set the variable
-.Va var
-to a
-.Dq \&? ;
-.Ic getopts
-will then unset
-.Ev OPTARG
-and write output to standard error.
-By specifying a colon as the first character of
-.Va optstring
-all errors will be ignored.
-.Pp
-A nonzero value is returned when the last option is reached.
-If there are no remaining arguments,
-.Ic getopts
-will set
-.Va var
-to the special option,
-.Dq -- ,
-otherwise, it will set
-.Va var
-to
-.Dq \&? .
-.Pp
-The following code fragment shows how one might process the arguments
-for a command that can take the options
-.Op a
-and
-.Op b ,
-and the option
-.Op c ,
-which requires an argument.
-.Pp
-.Bd -literal -offset indent
-while getopts abc: f
-do
-	case $f in
-	a | b)	flag=$f;;
-	c)	carg=$OPTARG;;
-	\\?)	echo $USAGE; exit 1;;
-	esac
-done
-shift `expr $OPTIND - 1`
-.Ed
-.Pp
-This code will accept any of the following as equivalent:
-.Pp
-.Bd -literal -offset indent
-cmd \-acarg file file
-cmd \-a \-c arg file file
-cmd \-carg -a file file
-cmd \-a \-carg \-\- file file
-.Ed
-.It hash Fl rv Ar command ...
-The shell maintains a hash table which remembers the
-locations of commands.
-With no arguments whatsoever,
-the
-.Ic hash
-command prints out the contents of this table.
-Entries which have not been looked at since the last
-.Ic cd
-command are marked with an asterisk; it is possible for these entries
-to be invalid.
-.Pp
-With arguments, the
-.Ic hash
-command removes the specified commands from the hash table (unless
-they are functions) and then locates them.
-With the
-.Fl v
-option, hash prints the locations of the commands as it finds them.
-The
-.Fl r
-option causes the hash command to delete all the entries in the hash table
-except for functions.
-.It inputrc Ar file
-Read the
-.Va file
-to set keybindings as defined by
-.Xr editrc 5 .
-.It jobid Op Ar job
-Print the process id's of the processes in the job.
-If the
-.Ar job
-argument is omitted, the current job is used.
-.It jobs
-This command lists out all the background processes
-which are children of the current shell process.
-.It pwd Op Fl LP
-Print the current directory.
-If 
-.Fl L
-is specified the cached value (initially set from
-.Ev PWD )
-is checked to see if it refers to the current directory, if it does
-the value is printed.
-Otherwise the current directory name is found using
-.Xr getcwd(3) .
-The environment variable
-.Ev PWD
-is set to printed value.
-.Pp
-The default is
-.Ic pwd
-.Fl L ,
-but note that the builtin
-.Ic cd
-command doesn't currently support
-.Fl L
-or
-.Fl P
-and will cache (almost) the absolute path.
-If
-.Ic cd
-is changed,
-.Ic pwd
-may be changed to default to
-.Ic pwd
-.Fl P .
-.Pp
-If the current directory is renamed and replaced by a symlink to the
-same directory, or the initial
-.Ev PWD
-value followed a symbolic link, then the cached value may not
-be the absolute path.
-.Pp
-The builtin command may differ from the program of the same name because
-the program will use
-.Ev PWD
-and the builtin uses a separately cached value.
-.It Xo read Op Fl p Ar prompt
-.Op Fl r
-.Ar variable
-.Op Ar ...
-.Xc
-The prompt is printed if the
-.Fl p
-option is specified and the standard input is a terminal.
-Then a line is read from the standard input.
-The trailing newline is deleted from the
-line and the line is split as described in the section on word splitting
-above, and the pieces are assigned to the variables in order.
-If there are more pieces than variables, the remaining pieces
-(along with the characters in
-.Ev IFS
-that separated them) are assigned to the last variable.
-If there are more variables than pieces,
-the remaining variables are assigned the null string.
-The
-.Ic read
-builtin will indicate success unless EOF is encountered on input, in
-which case failure is returned.
-.Pp
-By default, unless the
-.Fl r
-option is specified, the backslash
-.Dq \e
-acts as an escape character, causing the following character to be treated
-literally.
-If a backslash is followed by a newline, the backslash and the
-newline will be deleted.
-.It readonly Ar name ...
-.It readonly Fl p
-The specified names are marked as read only, so that they cannot be
-subsequently modified or unset.
-The shell allows the value of a variable
-to be set at the same time it is marked read only by writing
-.Pp
-.Dl readonly name=value
-.Pp
-With no arguments the readonly command lists the names of all read only
-variables.
-With the
-.Fl p
-option specified the output will be formatted suitably for non-interactive use.
-.Pp
-.It Xo set
-.Oo {
-.Fl options | Cm +options | Cm -- }
-.Oc Ar arg ...
-.Xc
-The
-.Ic set
-command performs three different functions.
-.Pp
-With no arguments, it lists the values of all shell variables.
-.Pp
-If options are given, it sets the specified option
-flags, or clears them as described in the section called
-.Sx Argument List Processing .
-.Pp
-The third use of the set command is to set the values of the shell's
-positional parameters to the specified args.
-To change the positional
-parameters without changing any options, use
-.Dq --
-as the first argument to set.
-If no args are present, the set command
-will clear all the positional parameters (equivalent to executing
-.Dq shift $# . )
-.It setvar Ar variable Ar value
-Assigns value to variable.
-(In general it is better to write
-variable=value rather than using
-.Ic setvar .
-.Ic setvar
-is intended to be used in
-functions that assign values to variables whose names are passed as
-parameters.)
-.It shift Op Ar n
-Shift the positional parameters n times.
-A
-.Ic shift
-sets the value of
-.Va $1
-to the value of
-.Va $2 ,
-the value of
-.Va $2
-to the value of
-.Va $3 ,
-and so on, decreasing
-the value of
-.Va $#
-by one.
-If there are zero positional parameters,
-.Ic shift
-does nothing.
-.It Xo trap
-.Op Fl l
-.Xc
-.It Xo trap
-.Op Ar action
-.Ar signal ...
-.Xc
-Cause the shell to parse and execute action when any of the specified
-signals are received.
-The signals are specified by signal number or as the name of the signal.
-If
-.Ar signal
-is
-.Li 0 ,
-the action is executed when the shell exits.
-.Ar action
-may be null, which cause the specified signals to be ignored.
-With
-.Ar action
-omitted or set to `-' the specified signals are set to their default action.
-When the shell forks off a subshell, it resets trapped (but not ignored)
-signals to the default action.
-The
-.Ic trap
-command has no effect on signals that were
-ignored on entry to the shell.
-Issuing
-.Ic trap
-with option
-.Ar -l
-will print a list of valid signal names.
-.Ic trap
-without any arguments cause it to write a list of signals and their
-associated action to the standard output in a format that is suitable
-as an input to the shell that achieves the same trapping results.
-.Pp
-Examples:
-.Pp
-.Dl trap
-.Pp
-List trapped signals and their corresponding action
-.Pp
-.Dl trap -l
-.Pp
-Print a list of valid signals
-.Pp
-.Dl trap '' INT QUIT tstp 30
-.Pp
-Ignore signals INT QUIT TSTP USR1
-.Pp
-.Dl trap date INT
-.Pp
-Print date upon receiving signal INT
-.It type Op Ar name ...
-Interpret each name as a command and print the resolution of the command
-search.
-Possible resolutions are:
-shell keyword, alias, shell builtin,
-command, tracked alias and not found.
-For aliases the alias expansion is
-printed; for commands and tracked aliases the complete pathname of the
-command is printed.
-.It ulimit Xo
-.Op Fl H \*(Ba Fl S
-.Op Fl a \*(Ba Fl tfdscmlpn Op Ar value
-.Xc
-Inquire about or set the hard or soft limits on processes or set new
-limits.
-The choice between hard limit (which no process is allowed to
-violate, and which may not be raised once it has been lowered) and soft
-limit (which causes processes to be signaled but not necessarily killed,
-and which may be raised) is made with these flags:
-.Bl -tag -width Fl
-.It Fl H
-set or inquire about hard limits
-.It Fl S
-set or inquire about soft limits.
-If neither
-.Fl H
-nor
-.Fl S
-is specified, the soft limit is displayed or both limits are set.
-If both are specified, the last one wins.
-.El
-.Pp
-.Bl -tag -width Fl
-The limit to be interrogated or set, then, is chosen by specifying
-any one of these flags:
-.It Fl a
-show all the current limits
-.It Fl b
-show or set the limit on the socket buffer size of a process (in bytes)
-.It Fl t
-show or set the limit on CPU time (in seconds)
-.It Fl f
-show or set the limit on the largest file that can be created
-(in 512-byte blocks)
-.It Fl d
-show or set the limit on the data segment size of a process (in kilobytes)
-.It Fl s
-show or set the limit on the stack size of a process (in kilobytes)
-.It Fl c
-show or set the limit on the largest core dump size that can be produced
-(in 512-byte blocks)
-.It Fl m
-show or set the limit on the total physical memory that can be
-in use by a process (in kilobytes)
-.It Fl l
-show or set the limit on how much memory a process can lock with
-.Xr mlock 2
-(in kilobytes)
-.It Fl p
-show or set the limit on the number of processes this user can
-have at one time
-.It Fl n
-show or set the limit on the number of files a process can have open at once
-.El
-.Pp
-If none of these is specified, it is the limit on file size that is shown
-or set.
-If value is specified, the limit is set to that number; otherwise
-the current limit is displayed.
-.Pp
-Limits of an arbitrary process can be displayed or set using the
-.Xr sysctl 8
-utility.
-.Pp
-.It umask Op Ar mask
-Set the value of umask (see
-.Xr umask 2 )
-to the specified octal value.
-If the argument is omitted, the umask value is printed.
-.It unalias Xo
-.Op Fl a
-.Op Ar name
-.Xc
-If
-.Ar name
-is specified, the shell removes that alias.
-If
-.Fl a
-is specified, all aliases are removed.
-.It unset Ar name ...
-The specified variables and functions are unset and unexported.
-If a given name corresponds to both a variable and a function, both
-the variable and the function are unset.
-.It wait Op Ar job
-Wait for the specified job to complete and return the exit status of the
-last process in the job.
-If the argument is omitted, wait for all jobs to
-complete and then return an exit status of zero.
-.El
-.Ss Command Line Editing
-When
-.Nm
-is being used interactively from a terminal, the current command
-and the command history (see
-.Ic fc
-in
-.Sx Builtins )
-can be edited using emacs-mode or vi-mode command-line editing.
-The command
-.Ql set -o emacs
-enables emacs-mode editing.
-The command
-.Ql set -o vi
-enables vi-mode editing and places sh into vi insert mode.
-(See the
-.Sx Argument List Processing
-section above.)
-.Pp
-The vi mode uses commands similar to a subset of those described in the
-.Xr vi 1
-man page.
-With vi-mode
-enabled, sh can be switched between insert mode and command mode.
-It's similar to vi: typing
-.Aq ESC
-will throw you into command VI command mode.
-Hitting
-.Aq return
-while in command mode will pass the line to the shell.
-.Pp
-The emacs mode uses commands similar to a subset available in
-the emacs editor.
-With emacs-mode enabled, special keys can be used to modify the text
-in the buffer using the control key.
-.Pp
-.Nm
-uses the
-.Xr editline 3
-library.
-.Sh EXIT STATUS
-Errors that are detected by the shell, such as a syntax error, will cause the
-shell to exit with a non-zero exit status.
-If the shell is not an
-interactive shell, the execution of the shell file will be aborted.
-Otherwise
-the shell will return the exit status of the last command executed, or
-if the exit builtin is used with a numeric argument, it will return the
-argument.
-.Sh ENVIRONMENT
-.Bl -tag -width MAILCHECK
-.It Ev HOME
-Set automatically by
-.Xr login 1
-from the user's login directory in the password file
-.Pq Xr passwd 5 .
-This environment variable also functions as the default argument for the
-cd builtin.
-.It Ev PATH
-The default search path for executables.
-See the above section
-.Sx Path Search .
-.It Ev CDPATH
-The search path used with the cd builtin.
-.It Ev LANG
-The string used to specify localization information that allows users
-to work with different culture-specific and language conventions.
-See
-.Xr nls 7 .
-.It Ev MAIL
-The name of a mail file, that will be checked for the arrival of new mail.
-Overridden by
-.Ev MAILPATH .
-.It Ev MAILCHECK
-The frequency in seconds that the shell checks for the arrival of mail
-in the files specified by the
-.Ev MAILPATH
-or the
-.Ev MAIL
-file.
-If set to 0, the check will occur at each prompt.
-.It Ev MAILPATH
-A colon
-.Dq \&:
-separated list of file names, for the shell to check for incoming mail.
-This environment setting overrides the
-.Ev MAIL
-setting.
-There is a maximum of 10 mailboxes that can be monitored at once.
-.It Ev PS1
-The primary prompt string, which defaults to
-.Dq $ \  ,
-unless you are the superuser, in which case it defaults to
-.Dq # \  .
-.It Ev PS2
-The secondary prompt string, which defaults to
-.Dq \*[Gt] \  .
-.It Ev PS4
-Output before each line when execution trace (set -x) is enabled,
-defaults to
-.Dq + \  .
-.It Ev IFS
-Input Field Separators.
-This is normally set to
-.Aq space ,
-.Aq tab ,
-and
-.Aq newline .
-See the
-.Sx White Space Splitting
-section for more details.
-.It Ev TERM
-The default terminal setting for the shell.
-This is inherited by
-children of the shell, and is used in the history editing modes.
-.It Ev HISTSIZE
-The number of lines in the history buffer for the shell.
-.El
-.Sh FILES
-.Bl -item -width HOMEprofilexxxx
-.It
-.Pa $HOME/.profile
-.It
-.Pa /etc/profile
-.El
-.Sh SEE ALSO
-.Xr csh 1 ,
-.Xr echo 1 ,
-.Xr getopt 1 ,
-.Xr ksh 1 ,
-.Xr login 1 ,
-.Xr printf 1 ,
-.Xr test 1 ,
-.Xr editline 3 ,
-.Xr getopt 3 ,
-.\" .Xr profile 4 ,
-.Xr editrc 5 ,
-.Xr passwd 5 ,
-.Xr environ 7 ,
-.Xr nls 7 ,
-.Xr sysctl 8
-.Sh HISTORY
-A
-.Nm
-command appeared in
-.At v1 .
-It was, however, unmaintainable so we wrote this one.
-.Sh BUGS
-Setuid shell scripts should be avoided at all costs, as they are a
-significant security risk.
-.Pp
-PS1, PS2, and PS4 should be subject to parameter expansion before
-being displayed.
diff --git a/sh/shell.h b/sh/shell.h
deleted file mode 100644
index 94be27a..0000000
--- a/sh/shell.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*	$NetBSD: shell.h,v 1.17 2003/08/07 09:05:38 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)shell.h	8.2 (Berkeley) 5/4/95
- */
-
-/*
- * The follow should be set to reflect the type of system you have:
- *	JOBS -> 1 if you have Berkeley job control, 0 otherwise.
- *	SHORTNAMES -> 1 if your linker cannot handle long names.
- *	define BSD if you are running 4.2 BSD or later.
- *	define SYSV if you are running under System V.
- *	define DEBUG=1 to compile in debugging ('set -o debug' to turn on)
- *	define DEBUG=2 to compile in and turn on debugging.
- *	define DO_SHAREDVFORK to indicate that vfork(2) shares its address
- *	       with its parent.
- *
- * When debugging is on, debugging info will be written to ./trace and
- * a quit signal will generate a core dump.
- */
-
-#include <sys/param.h>
-
-#define JOBS 1
-#ifndef BSD
-#define BSD 1
-#endif
-
-#ifndef DO_SHAREDVFORK
-#if __NetBSD_Version__ >= 104000000
-#define DO_SHAREDVFORK
-#endif
-#endif
-
-typedef void *pointer;
-#ifndef NULL
-#define NULL (void *)0
-#endif
-#define STATIC	/* empty */
-#define MKINIT	/* empty */
-
-#include <sys/cdefs.h>
-
-extern char nullstr[1];		/* null string */
-
-
-#ifdef DEBUG
-#define TRACE(param)	trace param
-#define TRACEV(param)	tracev param
-#else
-#define TRACE(param)
-#define TRACEV(param)
-#endif
diff --git a/sh/show.c b/sh/show.c
deleted file mode 100644
index e92aa51..0000000
--- a/sh/show.c
+++ /dev/null
@@ -1,425 +0,0 @@
-/*	$NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)show.c	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: show.c,v 1.26 2003/11/14 10:46:13 dsl Exp $");
-#endif
-#endif /* not lint */
-
-#include <stdio.h>
-#include <stdarg.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "parser.h"
-#include "nodes.h"
-#include "mystring.h"
-#include "show.h"
-#include "options.h"
-
-
-#ifdef DEBUG
-static void shtree(union node *, int, char *, FILE*);
-static void shcmd(union node *, FILE *);
-static void sharg(union node *, FILE *);
-static void indent(int, char *, FILE *);
-static void trstring(char *);
-
-
-void
-showtree(union node *n)
-{
-	trputs("showtree called\n");
-	shtree(n, 1, NULL, stdout);
-}
-
-
-static void
-shtree(union node *n, int ind, char *pfx, FILE *fp)
-{
-	struct nodelist *lp;
-	const char *s;
-
-	if (n == NULL)
-		return;
-
-	indent(ind, pfx, fp);
-	switch(n->type) {
-	case NSEMI:
-		s = "; ";
-		goto binop;
-	case NAND:
-		s = " && ";
-		goto binop;
-	case NOR:
-		s = " || ";
-binop:
-		shtree(n->nbinary.ch1, ind, NULL, fp);
-	   /*    if (ind < 0) */
-			fputs(s, fp);
-		shtree(n->nbinary.ch2, ind, NULL, fp);
-		break;
-	case NCMD:
-		shcmd(n, fp);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	case NPIPE:
-		for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-			shcmd(lp->n, fp);
-			if (lp->next)
-				fputs(" | ", fp);
-		}
-		if (n->npipe.backgnd)
-			fputs(" &", fp);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	default:
-		fprintf(fp, "<node type %d>", n->type);
-		if (ind >= 0)
-			putc('\n', fp);
-		break;
-	}
-}
-
-
-
-static void
-shcmd(union node *cmd, FILE *fp)
-{
-	union node *np;
-	int first;
-	const char *s;
-	int dftfd;
-
-	first = 1;
-	for (np = cmd->ncmd.args ; np ; np = np->narg.next) {
-		if (! first)
-			putchar(' ');
-		sharg(np, fp);
-		first = 0;
-	}
-	for (np = cmd->ncmd.redirect ; np ; np = np->nfile.next) {
-		if (! first)
-			putchar(' ');
-		switch (np->nfile.type) {
-			case NTO:	s = ">";  dftfd = 1; break;
-			case NCLOBBER:	s = ">|"; dftfd = 1; break;
-			case NAPPEND:	s = ">>"; dftfd = 1; break;
-			case NTOFD:	s = ">&"; dftfd = 1; break;
-			case NFROM:	s = "<";  dftfd = 0; break;
-			case NFROMFD:	s = "<&"; dftfd = 0; break;
-			case NFROMTO:	s = "<>"; dftfd = 0; break;
-			default:  	s = "*error*"; dftfd = 0; break;
-		}
-		if (np->nfile.fd != dftfd)
-			fprintf(fp, "%d", np->nfile.fd);
-		fputs(s, fp);
-		if (np->nfile.type == NTOFD || np->nfile.type == NFROMFD) {
-			fprintf(fp, "%d", np->ndup.dupfd);
-		} else {
-			sharg(np->nfile.fname, fp);
-		}
-		first = 0;
-	}
-}
-
-
-
-static void
-sharg(union node *arg, FILE *fp)
-{
-	char *p;
-	struct nodelist *bqlist;
-	int subtype;
-
-	if (arg->type != NARG) {
-		printf("<node type %d>\n", arg->type);
-		abort();
-	}
-	bqlist = arg->narg.backquote;
-	for (p = arg->narg.text ; *p ; p++) {
-		switch (*p) {
-		case CTLESC:
-			putc(*++p, fp);
-			break;
-		case CTLVAR:
-			putc('$', fp);
-			putc('{', fp);
-			subtype = *++p;
-			if (subtype == VSLENGTH)
-				putc('#', fp);
-
-			while (*p != '=')
-				putc(*p++, fp);
-
-			if (subtype & VSNUL)
-				putc(':', fp);
-
-			switch (subtype & VSTYPE) {
-			case VSNORMAL:
-				putc('}', fp);
-				break;
-			case VSMINUS:
-				putc('-', fp);
-				break;
-			case VSPLUS:
-				putc('+', fp);
-				break;
-			case VSQUESTION:
-				putc('?', fp);
-				break;
-			case VSASSIGN:
-				putc('=', fp);
-				break;
-			case VSTRIMLEFT:
-				putc('#', fp);
-				break;
-			case VSTRIMLEFTMAX:
-				putc('#', fp);
-				putc('#', fp);
-				break;
-			case VSTRIMRIGHT:
-				putc('%', fp);
-				break;
-			case VSTRIMRIGHTMAX:
-				putc('%', fp);
-				putc('%', fp);
-				break;
-			case VSLENGTH:
-				break;
-			default:
-				printf("<subtype %d>", subtype);
-			}
-			break;
-		case CTLENDVAR:
-		     putc('}', fp);
-		     break;
-		case CTLBACKQ:
-		case CTLBACKQ|CTLQUOTE:
-			putc('$', fp);
-			putc('(', fp);
-			shtree(bqlist->n, -1, NULL, fp);
-			putc(')', fp);
-			break;
-		default:
-			putc(*p, fp);
-			break;
-		}
-	}
-}
-
-
-static void
-indent(int amount, char *pfx, FILE *fp)
-{
-	int i;
-
-	for (i = 0 ; i < amount ; i++) {
-		if (pfx && i == amount - 1)
-			fputs(pfx, fp);
-		putc('\t', fp);
-	}
-}
-#endif
-
-
-
-/*
- * Debugging stuff.
- */
-
-
-FILE *tracefile;
-
-
-#ifdef DEBUG
-void
-trputc(int c)
-{
-	if (debug != 1)
-		return;
-	putc(c, tracefile);
-}
-#endif
-
-void
-trace(const char *fmt, ...)
-{
-#ifdef DEBUG
-	va_list va;
-
-	if (debug != 1)
-		return;
-	va_start(va, fmt);
-	(void) vfprintf(tracefile, fmt, va);
-	va_end(va);
-#endif
-}
-
-void
-tracev(const char *fmt, va_list va)
-{
-#ifdef DEBUG
-	if (debug != 1)
-		return;
-	(void) vfprintf(tracefile, fmt, va);
-#endif
-}
-
-
-#ifdef DEBUG
-void
-trputs(const char *s)
-{
-	if (debug != 1)
-		return;
-	fputs(s, tracefile);
-}
-
-
-static void
-trstring(char *s)
-{
-	char *p;
-	char c;
-
-	if (debug != 1)
-		return;
-	putc('"', tracefile);
-	for (p = s ; *p ; p++) {
-		switch (*p) {
-		case '\n':  c = 'n';  goto backslash;
-		case '\t':  c = 't';  goto backslash;
-		case '\r':  c = 'r';  goto backslash;
-		case '"':  c = '"';  goto backslash;
-		case '\\':  c = '\\';  goto backslash;
-		case CTLESC:  c = 'e';  goto backslash;
-		case CTLVAR:  c = 'v';  goto backslash;
-		case CTLVAR+CTLQUOTE:  c = 'V';  goto backslash;
-		case CTLBACKQ:  c = 'q';  goto backslash;
-		case CTLBACKQ+CTLQUOTE:  c = 'Q';  goto backslash;
-backslash:	  putc('\\', tracefile);
-			putc(c, tracefile);
-			break;
-		default:
-			if (*p >= ' ' && *p <= '~')
-				putc(*p, tracefile);
-			else {
-				putc('\\', tracefile);
-				putc(*p >> 6 & 03, tracefile);
-				putc(*p >> 3 & 07, tracefile);
-				putc(*p & 07, tracefile);
-			}
-			break;
-		}
-	}
-	putc('"', tracefile);
-}
-#endif
-
-
-void
-trargs(char **ap)
-{
-#ifdef DEBUG
-	if (debug != 1)
-		return;
-	while (*ap) {
-		trstring(*ap++);
-		if (*ap)
-			putc(' ', tracefile);
-		else
-			putc('\n', tracefile);
-	}
-#endif
-}
-
-
-#ifdef DEBUG
-void
-opentrace(void)
-{
-	char s[100];
-#ifdef O_APPEND
-	int flags;
-#endif
-
-	if (debug != 1) {
-		if (tracefile)
-			fflush(tracefile);
-		/* leave open because libedit might be using it */
-		return;
-	}
-#ifdef not_this_way
-	{
-		char *p;
-		if ((p = getenv("HOME")) == NULL) {
-			if (geteuid() == 0)
-				p = "/";
-			else
-				p = "/tmp";
-		}
-		scopy(p, s);
-		strcat(s, "/trace");
-	}
-#else
-	scopy("./trace", s);
-#endif /* not_this_way */
-	if (tracefile) {
-		if (!freopen(s, "a", tracefile)) {
-			fprintf(stderr, "Can't re-open %s\n", s);
-			debug = 0;
-			return;
-		}
-	} else {
-		if ((tracefile = fopen(s, "a")) == NULL) {
-			fprintf(stderr, "Can't open %s\n", s);
-			debug = 0;
-			return;
-		}
-	}
-#ifdef O_APPEND
-	if ((flags = fcntl(fileno(tracefile), F_GETFL, 0)) >= 0)
-		fcntl(fileno(tracefile), F_SETFL, flags | O_APPEND);
-#endif
-	setlinebuf(tracefile);
-	fputs("\nTracing started.\n", tracefile);
-}
-#endif /* DEBUG */
diff --git a/sh/show.h b/sh/show.h
deleted file mode 100644
index 3152ff2..0000000
--- a/sh/show.h
+++ /dev/null
@@ -1,45 +0,0 @@
-/*	$NetBSD: show.h,v 1.7 2003/08/07 09:05:38 agc Exp $	*/
-
-/*-
- * Copyright (c) 1995
- *      The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)show.h	1.1 (Berkeley) 5/4/95
- */
-
-#include <stdarg.h>
-
-union node;
-void showtree(union node *);
-void trace(const char *, ...);
-void tracev(const char *, va_list);
-void trargs(char **);
-#ifdef DEBUG
-void trputc(int);
-void trputs(const char *);
-void opentrace(void);
-#endif
diff --git a/sh/syntax.c b/sh/syntax.c
deleted file mode 100644
index 094f674..0000000
--- a/sh/syntax.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/*	$NetBSD: syntax.c,v 1.1 2004/01/17 17:38:12 dsl Exp $	*/
-
-#include "shell.h"
-#include "syntax.h"
-#include "parser.h"
-#include <limits.h>
-
-#if CWORD != 0
-#error initialisation assumes 'CWORD' is zero
-#endif
-
-#define ndx(ch) (ch + 1 - CHAR_MIN)
-#define set(ch, val) [ndx(ch)] = val,
-#define set_range(s, e, val) [ndx(s) ... ndx(e)] = val,
-
-/* syntax table used when not in quotes */
-const char basesyntax[257] = { CEOF,
-    set_range(CTL_FIRST, CTL_LAST, CCTL)
-    set('\n', CNL)
-    set('\\', CBACK)
-    set('\'', CSQUOTE)
-    set('"', CDQUOTE)
-    set('`', CBQUOTE)
-    set('$', CVAR)
-    set('}', CENDVAR)
-    set('<', CSPCL)
-    set('>', CSPCL)
-    set('(', CSPCL)
-    set(')', CSPCL)
-    set(';', CSPCL)
-    set('&', CSPCL)
-    set('|', CSPCL)
-    set(' ', CSPCL)
-    set('\t', CSPCL)
-};
-
-/* syntax table used when in double quotes */
-const char dqsyntax[257] = { CEOF,
-    set_range(CTL_FIRST, CTL_LAST, CCTL)
-    set('\n', CNL)
-    set('\\', CBACK)
-    set('"', CDQUOTE)
-    set('`', CBQUOTE)
-    set('$', CVAR)
-    set('}', CENDVAR)
-    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
-    set('!', CCTL)
-    set('*', CCTL)
-    set('?', CCTL)
-    set('[', CCTL)
-    set('=', CCTL)
-    set('~', CCTL)
-    set(':', CCTL)
-    set('/', CCTL)
-    set('-', CCTL)
-};
-
-/* syntax table used when in single quotes */
-const char sqsyntax[257] = { CEOF,
-    set_range(CTL_FIRST, CTL_LAST, CCTL)
-    set('\n', CNL)
-    set('\'', CSQUOTE)
-    /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */
-    set('!', CCTL)
-    set('*', CCTL)
-    set('?', CCTL)
-    set('[', CCTL)
-    set('=', CCTL)
-    set('~', CCTL)
-    set(':', CCTL)
-    set('/', CCTL)
-    set('-', CCTL)
-};
-
-/* syntax table used when in arithmetic */
-const char arisyntax[257] = { CEOF,
-    set_range(CTL_FIRST, CTL_LAST, CCTL)
-    set('\n', CNL)
-    set('\\', CBACK)
-    set('`', CBQUOTE)
-    set('\'', CSQUOTE)
-    set('"', CDQUOTE)
-    set('$', CVAR)
-    set('}', CENDVAR)
-    set('(', CLP)
-    set(')', CRP)
-};
-
-/* character classification table */
-const char is_type[257] = { 0,
-    set_range('0', '9', ISDIGIT)
-    set_range('a', 'z', ISLOWER)
-    set_range('A', 'Z', ISUPPER)
-    set('_', ISUNDER)
-    set('#', ISSPECL)
-    set('?', ISSPECL)
-    set('$', ISSPECL)
-    set('!', ISSPECL)
-    set('-', ISSPECL)
-    set('*', ISSPECL)
-    set('@', ISSPECL)
-};
diff --git a/sh/syntax.h b/sh/syntax.h
deleted file mode 100644
index 89a32dc..0000000
--- a/sh/syntax.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*	$NetBSD: syntax.h,v 1.2 2004/01/17 17:38:12 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#include <ctype.h>
-
-/* Syntax classes */
-#define CWORD 0			/* character is nothing special */
-#define CNL 1			/* newline character */
-#define CBACK 2			/* a backslash character */
-#define CSQUOTE 3		/* single quote */
-#define CDQUOTE 4		/* double quote */
-#define CBQUOTE 5		/* backwards single quote */
-#define CVAR 6			/* a dollar sign */
-#define CENDVAR 7		/* a '}' character */
-#define CLP 8			/* a left paren in arithmetic */
-#define CRP 9			/* a right paren in arithmetic */
-#define CEOF 10			/* end of file */
-#define CCTL 11			/* like CWORD, except it must be escaped */
-#define CSPCL 12		/* these terminate a word */
-
-/* Syntax classes for is_ functions */
-#define ISDIGIT 01		/* a digit */
-#define ISUPPER 02		/* an upper case letter */
-#define ISLOWER 04		/* a lower case letter */
-#define ISUNDER 010		/* an underscore */
-#define ISSPECL 020		/* the name of a special parameter */
-
-#define PEOF (CHAR_MIN - 1)
-#define SYNBASE (-PEOF)
-/* XXX UPEOF is CHAR_MAX, so is a valid 'char' value... */
-#define UPEOF ((char)PEOF)
-
-
-#define BASESYNTAX (basesyntax + SYNBASE)
-#define DQSYNTAX (dqsyntax + SYNBASE)
-#define SQSYNTAX (sqsyntax + SYNBASE)
-#define ARISYNTAX (arisyntax + SYNBASE)
-
-/* These defines assume that the digits are contiguous */
-#define is_digit(c)	((unsigned)((c) - '0') <= 9)
-#define is_alpha(c)	(((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && isalpha((unsigned char)(c)))
-#define is_name(c)	(((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalpha((unsigned char)(c))))
-#define is_in_name(c)	(((char)(c)) != UPEOF && ((c) < CTL_FIRST || (c) > CTL_LAST) && ((c) == '_' || isalnum((unsigned char)(c))))
-#define is_special(c)	((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))
-#define digit_val(c)	((c) - '0')
-
-extern const char basesyntax[];
-extern const char dqsyntax[];
-extern const char sqsyntax[];
-extern const char arisyntax[];
-extern const char is_type[];
diff --git a/sh/token.h b/sh/token.h
deleted file mode 100644
index c961f01..0000000
--- a/sh/token.h
+++ /dev/null
@@ -1,112 +0,0 @@
-#define TEOF 0
-#define TNL 1
-#define TSEMI 2
-#define TBACKGND 3
-#define TAND 4
-#define TOR 5
-#define TPIPE 6
-#define TLP 7
-#define TRP 8
-#define TENDCASE 9
-#define TENDBQUOTE 10
-#define TREDIR 11
-#define TWORD 12
-#define TIF 13
-#define TTHEN 14
-#define TELSE 15
-#define TELIF 16
-#define TFI 17
-#define TWHILE 18
-#define TUNTIL 19
-#define TFOR 20
-#define TDO 21
-#define TDONE 22
-#define TBEGIN 23
-#define TEND 24
-#define TCASE 25
-#define TESAC 26
-#define TNOT 27
-
-/* Array indicating which tokens mark the end of a list */
-const char tokendlist[] = {
-	1,
-	0,
-	0,
-	0,
-	0,
-	0,
-	0,
-	0,
-	1,
-	1,
-	1,
-	0,
-	0,
-	0,
-	1,
-	1,
-	1,
-	1,
-	0,
-	0,
-	0,
-	1,
-	1,
-	0,
-	1,
-	0,
-	1,
-	0,
-};
-
-const char *const tokname[] = {
-	"end of file",
-	"newline",
-	"\";\"",
-	"\"&\"",
-	"\"&&\"",
-	"\"||\"",
-	"\"|\"",
-	"\"(\"",
-	"\")\"",
-	"\";;\"",
-	"\"`\"",
-	"redirection",
-	"word",
-	"\"if\"",
-	"\"then\"",
-	"\"else\"",
-	"\"elif\"",
-	"\"fi\"",
-	"\"while\"",
-	"\"until\"",
-	"\"for\"",
-	"\"do\"",
-	"\"done\"",
-	"\"{\"",
-	"\"}\"",
-	"\"case\"",
-	"\"esac\"",
-	"\"!\"",
-};
-
-#define KWDOFFSET 13
-
-const char *const parsekwd[] = {
-	"if",
-	"then",
-	"else",
-	"elif",
-	"fi",
-	"while",
-	"until",
-	"for",
-	"do",
-	"done",
-	"{",
-	"}",
-	"case",
-	"esac",
-	"!",
-	0
-};
diff --git a/sh/trap.c b/sh/trap.c
deleted file mode 100644
index dcd76ac..0000000
--- a/sh/trap.c
+++ /dev/null
@@ -1,456 +0,0 @@
-/*	$NetBSD: trap.c,v 1.31 2005/01/11 19:38:57 christos Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)trap.c	8.5 (Berkeley) 6/5/95";
-#else
-__RCSID("$NetBSD: trap.c,v 1.31 2005/01/11 19:38:57 christos Exp $");
-#endif
-#endif /* not lint */
-
-#include <signal.h>
-#include <unistd.h>
-#include <stdlib.h>
-
-#include "shell.h"
-#include "main.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"
-#include "jobs.h"
-#include "show.h"
-#include "options.h"
-#include "syntax.h"
-#include "output.h"
-#include "memalloc.h"
-#include "error.h"
-#include "trap.h"
-#include "mystring.h"
-#include "var.h"
-
-/*
- * Sigmode records the current value of the signal handlers for the various
- * modes.  A value of zero means that the current handler is not known.
- * S_HARD_IGN indicates that the signal was ignored on entry to the shell,
- */
-
-#define S_DFL 1			/* default signal handling (SIG_DFL) */
-#define S_CATCH 2		/* signal is caught */
-#define S_IGN 3			/* signal is ignored (SIG_IGN) */
-#define S_HARD_IGN 4		/* signal is ignored permenantly */
-#define S_RESET 5		/* temporary - to reset a hard ignored sig */
-
-
-char *trap[NSIG+1];		/* trap handler commands */
-MKINIT char sigmode[NSIG];	/* current value of signal */
-char gotsig[NSIG];		/* indicates specified signal received */
-int pendingsigs;		/* indicates some signal received */
-
-static int getsigaction(int, sig_t *);
-
-/*
- * return the signal number described by `p' (as a number or a name)
- * or -1 if it isn't one
- */
-
-static int
-signame_to_signum(const char *p)
-{
-	int i;
-
-	if (is_number(p))
-		return number(p);
-
-	if (strcasecmp(p, "exit") == 0 )
-		return 0;
-	
-	if (strncasecmp(p, "sig", 3) == 0)
-		p += 3;
-
-	for (i = 0; i < NSIG; ++i)
-		if (sys_signame[i] && (strcasecmp (p, sys_signame[i]) == 0))
-			return i;
-	return -1;
-}
-
-/*
- * Print a list of valid signal names
- */
-static void
-printsignals(void)
-{
-	int n;
-
-	out1str("EXIT ");
-
-	for (n = 1; n < NSIG; n++) {
-		out1fmt("%s", sys_signame[n]);
-		if ((n == NSIG/2) ||  n == (NSIG - 1))
-			out1str("\n");
-		else
-			out1c(' ');
-	}
-}
-
-/*
- * The trap builtin.
- */
-
-int
-trapcmd(int argc, char **argv)
-{
-	char *action;
-	char **ap;
-	int signo;
-
-	if (argc <= 1) {
-		for (signo = 0 ; signo <= NSIG ; signo++)
-			if (trap[signo] != NULL) {
-				out1fmt("trap -- ");
-				print_quoted(trap[signo]);
-				out1fmt(" %s\n",
-				    (signo) ? sys_signame[signo] : "EXIT");
-			}
-		return 0;
-	}
-	ap = argv + 1;
-
-	action = NULL;
-
-	if (strcmp(*ap, "--") == 0)
-		if (*++ap == NULL)
-			return 0;
-
-	if (signame_to_signum(*ap) == -1) {
-		if ((*ap)[0] == '-') {
-			if ((*ap)[1] == '\0')
-				ap++;
-			else if ((*ap)[1] == 'l' && (*ap)[2] == '\0') {
-				printsignals();
-				return 0;
-			}
-			else
-				error("bad option %s\n", *ap);
-		}
-		else
-			action = *ap++;
-	}
-
-	while (*ap) {
-		if (is_number(*ap))
-			signo = number(*ap);
-		else
-			signo = signame_to_signum(*ap);
-
-		if (signo < 0 || signo > NSIG)
-			error("%s: bad trap", *ap);
-
-		INTOFF;
-		if (action)
-			action = savestr(action);
-
-		if (trap[signo])
-			ckfree(trap[signo]);
-
-		trap[signo] = action;
-
-		if (signo != 0)
-			setsignal(signo, 0);
-		INTON;
-		ap++;
-	}
-	return 0;
-}
-
-
-
-/*
- * Clear traps on a fork or vfork.
- * Takes one arg vfork, to tell it to not be destructive of
- * the parents variables.
- */
-
-void
-clear_traps(int vforked)
-{
-	char **tp;
-
-	for (tp = trap ; tp <= &trap[NSIG] ; tp++) {
-		if (*tp && **tp) {	/* trap not NULL or SIG_IGN */
-			INTOFF;
-			if (!vforked) {
-				ckfree(*tp);
-				*tp = NULL;
-			}
-			if (tp != &trap[0])
-				setsignal(tp - trap, vforked);
-			INTON;
-		}
-	}
-}
-
-
-
-/*
- * Set the signal handler for the specified signal.  The routine figures
- * out what it should be set to.
- */
-
-long
-setsignal(int signo, int vforked)
-{
-	int action;
-	sig_t sigact = SIG_DFL;
-	struct sigaction act, oact;
-	char *t, tsig;
-
-	if ((t = trap[signo]) == NULL)
-		action = S_DFL;
-	else if (*t != '\0')
-		action = S_CATCH;
-	else
-		action = S_IGN;
-	if (rootshell && !vforked && action == S_DFL) {
-		switch (signo) {
-		case SIGINT:
-			if (iflag || minusc || sflag == 0)
-				action = S_CATCH;
-			break;
-		case SIGQUIT:
-#ifdef DEBUG
-			if (debug)
-				break;
-#endif
-			/* FALLTHROUGH */
-		case SIGTERM:
-			if (iflag)
-				action = S_IGN;
-			break;
-#if JOBS
-		case SIGTSTP:
-		case SIGTTOU:
-			if (mflag)
-				action = S_IGN;
-			break;
-#endif
-		}
-	}
-
-	t = &sigmode[signo - 1];
-	tsig = *t;
-	if (tsig == 0) {
-		/*
-		 * current setting unknown
-		 */
-		if (!getsigaction(signo, &sigact)) {
-			/*
-			 * Pretend it worked; maybe we should give a warning
-			 * here, but other shells don't. We don't alter
-			 * sigmode, so that we retry every time.
-			 */
-			return 0;
-		}
-		if (sigact == SIG_IGN) {
-			if (mflag && (signo == SIGTSTP ||
-			     signo == SIGTTIN || signo == SIGTTOU)) {
-				tsig = S_IGN;	/* don't hard ignore these */
-			} else
-				tsig = S_HARD_IGN;
-		} else {
-			tsig = S_RESET;	/* force to be set */
-		}
-	}
-	if (tsig == S_HARD_IGN || tsig == action)
-		return 0;
-	switch (action) {
-		case S_DFL:	sigact = SIG_DFL;	break;
-		case S_CATCH:  	sigact = onsig;		break;
-		case S_IGN:	sigact = SIG_IGN;	break;
-	}
-	if (!vforked)
-		*t = action;
-    act.sa_handler = sigact;
-    sigemptyset(&act.sa_mask);
-    act.sa_flags = 0;
-#ifdef SA_INTERRUPT
-    act.sa_flags |= SA_INTERRUPT;
-#endif
-    if(sigaction(signo, &act, &oact) < 0)
-        return (long) SIG_ERR;
-    return (long) oact.sa_handler;
-}
-
-/*
- * Return the current setting for sig w/o changing it.
- */
-static int
-getsigaction(int signo, sig_t *sigact)
-{
-	struct sigaction sa;
-
-	if (sigaction(signo, (struct sigaction *)0, &sa) == -1)
-		return 0;
-	*sigact = (sig_t) sa.sa_handler;
-	return 1;
-}
-
-/*
- * Ignore a signal.
- */
-
-void
-ignoresig(int signo, int vforked)
-{
-	if (sigmode[signo - 1] != S_IGN && sigmode[signo - 1] != S_HARD_IGN)
-		bsd_signal(signo, SIG_IGN);
-	if (!vforked)
-		sigmode[signo - 1] = S_HARD_IGN;
-}
-
-
-#ifdef mkinit
-INCLUDE <signal.h>
-INCLUDE "trap.h"
-
-SHELLPROC {
-	char *sm;
-
-	clear_traps(0);
-	for (sm = sigmode ; sm < sigmode + NSIG ; sm++) {
-		if (*sm == S_IGN)
-			*sm = S_HARD_IGN;
-	}
-}
-#endif
-
-
-
-/*
- * Signal handler.
- */
-
-void
-onsig(int signo)
-{
-	bsd_signal(signo, onsig);
-	if (signo == SIGINT && trap[SIGINT] == NULL) {
-		onint();
-		return;
-	}
-	gotsig[signo - 1] = 1;
-	pendingsigs++;
-}
-
-
-
-/*
- * Called to execute a trap.  Perhaps we should avoid entering new trap
- * handlers while we are executing a trap handler.
- */
-
-void
-dotrap(void)
-{
-	int i;
-	int savestatus;
-
-	for (;;) {
-		for (i = 1 ; ; i++) {
-			if (gotsig[i - 1])
-				break;
-			if (i >= NSIG)
-				goto done;
-		}
-		gotsig[i - 1] = 0;
-		savestatus=exitstatus;
-		evalstring(trap[i], 0);
-		exitstatus=savestatus;
-	}
-done:
-	pendingsigs = 0;
-}
-
-
-
-/*
- * Controls whether the shell is interactive or not.
- */
-
-
-void
-setinteractive(int on)
-{
-	static int is_interactive;
-
-	if (on == is_interactive)
-		return;
-	setsignal(SIGINT, 0);
-	setsignal(SIGQUIT, 0);
-	setsignal(SIGTERM, 0);
-	is_interactive = on;
-}
-
-
-
-/*
- * Called to exit the shell.
- */
-
-void
-exitshell(int status)
-{
-	struct jmploc loc1, loc2;
-	char *p;
-
-	TRACE(("pid %d, exitshell(%d)\n", getpid(), status));
-	if (setjmp(loc1.loc)) {
-		goto l1;
-	}
-	if (setjmp(loc2.loc)) {
-		goto l2;
-	}
-	handler = &loc1;
-	if ((p = trap[0]) != NULL && *p != '\0') {
-		trap[0] = NULL;
-		evalstring(p, 0);
-	}
-l1:   handler = &loc2;			/* probably unnecessary */
-	flushall();
-#if JOBS
-	setjobctl(0);
-#endif
-l2:   _exit(status);
-	/* NOTREACHED */
-}
diff --git a/sh/trap.h b/sh/trap.h
deleted file mode 100644
index 125ef40..0000000
--- a/sh/trap.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*	$NetBSD: trap.h,v 1.17 2003/08/07 09:05:39 agc Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)trap.h	8.3 (Berkeley) 6/5/95
- */
-
-extern int pendingsigs;
-
-int trapcmd(int, char **);
-void clear_traps(int);
-long setsignal(int, int);
-void ignoresig(int, int);
-void onsig(int);
-void dotrap(void);
-void setinteractive(int);
-void exitshell(int) __attribute__((__noreturn__));
diff --git a/sh/var.c b/sh/var.c
deleted file mode 100644
index a1f1689..0000000
--- a/sh/var.c
+++ /dev/null
@@ -1,825 +0,0 @@
-/*	$NetBSD: var.c,v 1.36 2004/10/06 10:23:43 enami Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-#ifndef lint
-#if 0
-static char sccsid[] = "@(#)var.c	8.3 (Berkeley) 5/4/95";
-#else
-__RCSID("$NetBSD: var.c,v 1.36 2004/10/06 10:23:43 enami Exp $");
-#endif
-#endif /* not lint */
-
-#include <unistd.h>
-#include <stdlib.h>
-#include <paths.h>
-
-/*
- * Shell variables.
- */
-
-#include "shell.h"
-#include "output.h"
-#include "expand.h"
-#include "nodes.h"	/* for other headers */
-#include "eval.h"	/* defines cmdenviron */
-#include "exec.h"
-#include "syntax.h"
-#include "options.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "mystring.h"
-#include "parser.h"
-#include "show.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-
-#ifdef SMALL
-#define VTABSIZE 39
-#else
-#define VTABSIZE 517
-#endif
-
-
-struct varinit {
-	struct var *var;
-	int flags;
-	const char *text;
-	void (*func)(const char *);
-};
-
-
-#if ATTY
-struct var vatty;
-#endif
-#ifdef WITH_HISTORY
-struct var vhistsize;
-struct var vterm;
-#endif
-struct var vifs;
-struct var vmpath;
-struct var vpath;
-struct var vps1;
-struct var vps2;
-struct var vps4;
-struct var vvers;
-struct var voptind;
-
-const struct varinit varinit[] = {
-#if ATTY
-	{ &vatty,	VSTRFIXED|VTEXTFIXED|VUNSET,	"ATTY=",
-	  NULL },
-#endif
-#ifdef WITH_HISTORY
-	{ &vhistsize,	VSTRFIXED|VTEXTFIXED|VUNSET,	"HISTSIZE=",
-	  sethistsize },
-#endif
-	{ &vifs,	VSTRFIXED|VTEXTFIXED,		"IFS= \t\n",
-	  NULL },
-	{ &vmpath,	VSTRFIXED|VTEXTFIXED|VUNSET,	"MAILPATH=",
-	  NULL },
-	{ &vpath,	VSTRFIXED|VTEXTFIXED,		"PATH=" _PATH_DEFPATH,
-	  changepath },
-	/*
-	 * vps1 depends on uid
-	 */
-	{ &vps2,	VSTRFIXED|VTEXTFIXED,		"PS2=> ",
-	  NULL },
-	{ &vps4,	VSTRFIXED|VTEXTFIXED,		"PS4=+ ",
-	  NULL },
-#ifdef WITH_HISTORY
-	{ &vterm,	VSTRFIXED|VTEXTFIXED|VUNSET,	"TERM=",
-	  setterm },
-#endif
-	{ &voptind,	VSTRFIXED|VTEXTFIXED|VNOFUNC,	"OPTIND=1",
-	  getoptsreset },
-	{ NULL,	0,				NULL,
-	  NULL }
-};
-
-struct var *vartab[VTABSIZE];
-
-STATIC int strequal(const char *, const char *);
-STATIC struct var *find_var(const char *, struct var ***, int *);
-
-/*
- * Initialize the varable symbol tables and import the environment
- */
-
-#ifdef mkinit
-INCLUDE "var.h"
-MKINIT char **environ;
-INIT {
-	char **envp;
-
-	initvar();
-	for (envp = environ ; *envp ; envp++) {
-		if (strchr(*envp, '=')) {
-			setvareq(*envp, VEXPORT|VTEXTFIXED);
-		}
-	}
-}
-#endif
-
-
-/*
- * This routine initializes the builtin variables.  It is called when the
- * shell is initialized and again when a shell procedure is spawned.
- */
-
-void
-initvar(void)
-{
-	const struct varinit *ip;
-	struct var *vp;
-	struct var **vpp;
-
-	for (ip = varinit ; (vp = ip->var) != NULL ; ip++) {
-		if (find_var(ip->text, &vpp, &vp->name_len) != NULL)
-			continue;
-		vp->next = *vpp;
-		*vpp = vp;
-		vp->text = strdup(ip->text);
-		vp->flags = ip->flags;
-		vp->func = ip->func;
-	}
-	/*
-	 * PS1 depends on uid
-	 */
-	if (find_var("PS1", &vpp, &vps1.name_len) == NULL) {
-		vps1.next = *vpp;
-		*vpp = &vps1;
-		vps1.text = strdup(geteuid() ? "PS1=$ " : "PS1=# ");
-		vps1.flags = VSTRFIXED|VTEXTFIXED;
-	}
-}
-
-/*
- * Safe version of setvar, returns 1 on success 0 on failure.
- */
-
-int
-setvarsafe(const char *name, const char *val, int flags)
-{
-	struct jmploc jmploc;
-	struct jmploc *volatile savehandler = handler;
-	int err = 0;
-#ifdef __GNUC__
-	(void) &err;
-#endif
-
-	if (setjmp(jmploc.loc))
-		err = 1;
-	else {
-		handler = &jmploc;
-		setvar(name, val, flags);
-	}
-	handler = savehandler;
-	return err;
-}
-
-/*
- * Set the value of a variable.  The flags argument is ored with the
- * flags of the variable.  If val is NULL, the variable is unset.
- */
-
-void
-setvar(const char *name, const char *val, int flags)
-{
-	const char *p;
-	const char *q;
-	char *d;
-	int len;
-	int namelen;
-	char *nameeq;
-	int isbad;
-
-	isbad = 0;
-	p = name;
-	if (! is_name(*p))
-		isbad = 1;
-	p++;
-	for (;;) {
-		if (! is_in_name(*p)) {
-			if (*p == '\0' || *p == '=')
-				break;
-			isbad = 1;
-		}
-		p++;
-	}
-	namelen = p - name;
-	if (isbad)
-		error("%.*s: bad variable name", namelen, name);
-	len = namelen + 2;		/* 2 is space for '=' and '\0' */
-	if (val == NULL) {
-		flags |= VUNSET;
-	} else {
-		len += strlen(val);
-	}
-	d = nameeq = ckmalloc(len);
-	q = name;
-	while (--namelen >= 0)
-		*d++ = *q++;
-	*d++ = '=';
-	*d = '\0';
-	if (val)
-		scopy(val, d);
-	setvareq(nameeq, flags);
-}
-
-
-
-/*
- * Same as setvar except that the variable and value are passed in
- * the first argument as name=value.  Since the first argument will
- * be actually stored in the table, it should not be a string that
- * will go away.
- */
-
-void
-setvareq(char *s, int flags)
-{
-	struct var *vp, **vpp;
-	int nlen;
-
-	if (aflag)
-		flags |= VEXPORT;
-	vp = find_var(s, &vpp, &nlen);
-	if (vp != NULL) {
-		if (vp->flags & VREADONLY)
-			error("%.*s: is read only", vp->name_len, s);
-		if (flags & VNOSET)
-			return;
-		INTOFF;
-
-		if (vp->func && (flags & VNOFUNC) == 0)
-			(*vp->func)(s + vp->name_len + 1);
-
-		if ((vp->flags & (VTEXTFIXED|VSTACK)) == 0)
-			ckfree(vp->text);
-
-		vp->flags &= ~(VTEXTFIXED|VSTACK|VUNSET);
-		vp->flags |= flags & ~VNOFUNC;
-		vp->text = s;
-
-		INTON;
-		return;
-	}
-	/* not found */
-	if (flags & VNOSET)
-		return;
-	vp = ckmalloc(sizeof (*vp));
-	vp->flags = flags & ~VNOFUNC;
-	vp->text = s;
-	vp->name_len = nlen;
-	vp->next = *vpp;
-	vp->func = NULL;
-	*vpp = vp;
-}
-
-
-
-/*
- * Process a linked list of variable assignments.
- */
-
-void
-listsetvar(struct strlist *list, int flags)
-{
-	struct strlist *lp;
-
-	INTOFF;
-	for (lp = list ; lp ; lp = lp->next) {
-		setvareq(savestr(lp->text), flags);
-	}
-	INTON;
-}
-
-void
-listmklocal(struct strlist *list, int flags)
-{
-	struct strlist *lp;
-
-	for (lp = list ; lp ; lp = lp->next)
-		mklocal(lp->text, flags);
-}
-
-
-/*
- * Find the value of a variable.  Returns NULL if not set.
- */
-
-char *
-lookupvar(const char *name)
-{
-	struct var *v;
-
-	v = find_var(name, NULL, NULL);
-	if (v == NULL || v->flags & VUNSET)
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-
-/*
- * Search the environment of a builtin command.  If the second argument
- * is nonzero, return the value of a variable even if it hasn't been
- * exported.
- */
-
-char *
-bltinlookup(const char *name, int doall)
-{
-	struct strlist *sp;
-	struct var *v;
-
-	for (sp = cmdenviron ; sp ; sp = sp->next) {
-		if (strequal(sp->text, name))
-			return strchr(sp->text, '=') + 1;
-	}
-
-	v = find_var(name, NULL, NULL);
-
-	if (v == NULL || v->flags & VUNSET || (!doall && !(v->flags & VEXPORT)))
-		return NULL;
-	return v->text + v->name_len + 1;
-}
-
-
-
-/*
- * Generate a list of exported variables.  This routine is used to construct
- * the third argument to execve when executing a program.
- */
-
-char **
-environment(void)
-{
-	int nenv;
-	struct var **vpp;
-	struct var *vp;
-	char **env;
-	char **ep;
-
-	nenv = 0;
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				nenv++;
-	}
-	ep = env = stalloc((nenv + 1) * sizeof *env);
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next)
-			if (vp->flags & VEXPORT)
-				*ep++ = vp->text;
-	}
-	*ep = NULL;
-	return env;
-}
-
-
-/*
- * Called when a shell procedure is invoked to clear out nonexported
- * variables.  It is also necessary to reallocate variables of with
- * VSTACK set since these are currently allocated on the stack.
- */
-
-#ifdef mkinit
-void shprocvar(void);
-
-SHELLPROC {
-	shprocvar();
-}
-#endif
-
-void
-shprocvar(void)
-{
-	struct var **vpp;
-	struct var *vp, **prev;
-
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (prev = vpp ; (vp = *prev) != NULL ; ) {
-			if ((vp->flags & VEXPORT) == 0) {
-				*prev = vp->next;
-				if ((vp->flags & VTEXTFIXED) == 0)
-					ckfree(vp->text);
-				if ((vp->flags & VSTRFIXED) == 0)
-					ckfree(vp);
-			} else {
-				if (vp->flags & VSTACK) {
-					vp->text = savestr(vp->text);
-					vp->flags &=~ VSTACK;
-				}
-				prev = &vp->next;
-			}
-		}
-	}
-	initvar();
-}
-
-
-
-/*
- * Command to list all variables which are set.  Currently this command
- * is invoked from the set command when the set command is called without
- * any variables.
- */
-
-void
-print_quoted(const char *p)
-{
-	const char *q;
-
-	if (strcspn(p, "|&;<>()$`\\\"' \t\n*?[]#~=%") == strlen(p)) {
-		out1fmt("%s", p);
-		return;
-	}
-	while (*p) {
-		if (*p == '\'') {
-			out1fmt("\\'");
-			p++;
-			continue;
-		}
-		q = index(p, '\'');
-		if (!q) {
-			out1fmt("'%s'", p );
-			return;
-		}
-		out1fmt("'%.*s'", (int)(q - p), p );
-		p = q;
-	}
-}
-
-static int
-sort_var(const void *v_v1, const void *v_v2)
-{
-	const struct var * const *v1 = v_v1;
-	const struct var * const *v2 = v_v2;
-
-	/* XXX Will anyone notice we include the '=' of the shorter name? */
-	return strcmp((*v1)->text, (*v2)->text);
-}
-
-/*
- * POSIX requires that 'set' (but not export or readonly) output the
- * variables in lexicographic order - by the locale's collating order (sigh).
- * Maybe we could keep them in an ordered balanced binary tree
- * instead of hashed lists.
- * For now just roll 'em through qsort for printing...
- */
-
-int
-showvars(const char *name, int flag, int show_value)
-{
-	struct var **vpp;
-	struct var *vp;
-	const char *p;
-
-	static struct var **list;	/* static in case we are interrupted */
-	static int list_len;
-	int count = 0;
-
-	if (!list) {
-		list_len = 32;
-		list = ckmalloc(list_len * sizeof *list);
-	}
-
-	for (vpp = vartab ; vpp < vartab + VTABSIZE ; vpp++) {
-		for (vp = *vpp ; vp ; vp = vp->next) {
-			if (flag && !(vp->flags & flag))
-				continue;
-			if (vp->flags & VUNSET && !(show_value & 2))
-				continue;
-			if (count >= list_len) {
-				list = ckrealloc(list,
-					(list_len << 1) * sizeof *list);
-				list_len <<= 1;
-			}
-			list[count++] = vp;
-		}
-	}
-
-	qsort(list, count, sizeof *list, sort_var);
-
-	for (vpp = list; count--; vpp++) {
-		vp = *vpp;
-		if (name)
-			out1fmt("%s ", name);
-		for (p = vp->text ; *p != '=' ; p++)
-			out1c(*p);
-		if (!(vp->flags & VUNSET) && show_value) {
-			out1fmt("=");
-			print_quoted(++p);
-		}
-		out1c('\n');
-	}
-	return 0;
-}
-
-
-
-/*
- * The export and readonly commands.
- */
-
-int
-exportcmd(int argc, char **argv)
-{
-	struct var *vp;
-	char *name;
-	const char *p;
-	int flag = argv[0][0] == 'r'? VREADONLY : VEXPORT;
-	int pflag;
-
-	pflag = nextopt("p") == 'p' ? 3 : 0;
-	if (argc <= 1 || pflag) {
-		showvars( pflag ? argv[0] : 0, flag, pflag );
-		return 0;
-	}
-
-	while ((name = *argptr++) != NULL) {
-		if ((p = strchr(name, '=')) != NULL) {
-			p++;
-		} else {
-			vp = find_var(name, NULL, NULL);
-			if (vp != NULL) {
-				vp->flags |= flag;
-				continue;
-			}
-		}
-		setvar(name, p, flag);
-	}
-	return 0;
-}
-
-
-/*
- * The "local" command.
- */
-
-int
-localcmd(int argc, char **argv)
-{
-	char *name;
-
-	if (! in_function())
-		error("Not in a function");
-	while ((name = *argptr++) != NULL) {
-		mklocal(name, 0);
-	}
-	return 0;
-}
-
-
-/*
- * Make a variable a local variable.  When a variable is made local, it's
- * value and flags are saved in a localvar structure.  The saved values
- * will be restored when the shell function returns.  We handle the name
- * "-" as a special case.
- */
-
-void
-mklocal(const char *name, int flags)
-{
-	struct localvar *lvp;
-	struct var **vpp;
-	struct var *vp;
-
-	INTOFF;
-	lvp = ckmalloc(sizeof (struct localvar));
-	if (name[0] == '-' && name[1] == '\0') {
-		char *p;
-		p = ckmalloc(sizeof_optlist);
-		lvp->text = memcpy(p, optlist, sizeof_optlist);
-		vp = NULL;
-	} else {
-		vp = find_var(name, &vpp, NULL);
-		if (vp == NULL) {
-			if (strchr(name, '='))
-				setvareq(savestr(name), VSTRFIXED|flags);
-			else
-				setvar(name, NULL, VSTRFIXED|flags);
-			vp = *vpp;	/* the new variable */
-			lvp->text = NULL;
-			lvp->flags = VUNSET;
-		} else {
-			lvp->text = vp->text;
-			lvp->flags = vp->flags;
-			vp->flags |= VSTRFIXED|VTEXTFIXED;
-			if (name[vp->name_len] == '=')
-				setvareq(savestr(name), flags);
-		}
-	}
-	lvp->vp = vp;
-	lvp->next = localvars;
-	localvars = lvp;
-	INTON;
-}
-
-
-/*
- * Called after a function returns.
- */
-
-void
-poplocalvars(void)
-{
-	struct localvar *lvp;
-	struct var *vp;
-
-	while ((lvp = localvars) != NULL) {
-		localvars = lvp->next;
-		vp = lvp->vp;
-		TRACE(("poplocalvar %s", vp ? vp->text : "-"));
-		if (vp == NULL) {	/* $- saved */
-			memcpy(optlist, lvp->text, sizeof_optlist);
-			ckfree(lvp->text);
-		} else if ((lvp->flags & (VUNSET|VSTRFIXED)) == VUNSET) {
-			(void)unsetvar(vp->text, 0);
-		} else {
-			if (vp->func && (vp->flags & VNOFUNC) == 0)
-				(*vp->func)(lvp->text + vp->name_len + 1);
-			if ((vp->flags & VTEXTFIXED) == 0)
-				ckfree(vp->text);
-			vp->flags = lvp->flags;
-			vp->text = lvp->text;
-		}
-		ckfree(lvp);
-	}
-}
-
-
-int
-setvarcmd(int argc, char **argv)
-{
-	if (argc <= 2)
-		return unsetcmd(argc, argv);
-	else if (argc == 3)
-		setvar(argv[1], argv[2], 0);
-	else
-		error("List assignment not implemented");
-	return 0;
-}
-
-
-/*
- * The unset builtin command.  We unset the function before we unset the
- * variable to allow a function to be unset when there is a readonly variable
- * with the same name.
- */
-
-int
-unsetcmd(int argc, char **argv)
-{
-	char **ap;
-	int i;
-	int flg_func = 0;
-	int flg_var = 0;
-	int ret = 0;
-
-	while ((i = nextopt("evf")) != '\0') {
-		if (i == 'f')
-			flg_func = 1;
-		else
-			flg_var = i;
-	}
-	if (flg_func == 0 && flg_var == 0)
-		flg_var = 1;
-
-	for (ap = argptr; *ap ; ap++) {
-		if (flg_func)
-			ret |= unsetfunc(*ap);
-		if (flg_var)
-			ret |= unsetvar(*ap, flg_var == 'e');
-	}
-	return ret;
-}
-
-
-/*
- * Unset the specified variable.
- */
-
-int
-unsetvar(const char *s, int unexport)
-{
-	struct var **vpp;
-	struct var *vp;
-
-	vp = find_var(s, &vpp, NULL);
-	if (vp == NULL)
-		return 1;
-
-	if (vp->flags & VREADONLY)
-		return (1);
-
-	INTOFF;
-	if (unexport) {
-		vp->flags &= ~VEXPORT;
-	} else {
-		if (vp->text[vp->name_len + 1] != '\0')
-			setvar(s, nullstr, 0);
-		vp->flags &= ~VEXPORT;
-		vp->flags |= VUNSET;
-		if ((vp->flags & VSTRFIXED) == 0) {
-			if ((vp->flags & VTEXTFIXED) == 0)
-				ckfree(vp->text);
-			*vpp = vp->next;
-			ckfree(vp);
-		}
-	}
-	INTON;
-	return 0;
-}
-
-
-/*
- * Returns true if the two strings specify the same varable.  The first
- * variable name is terminated by '='; the second may be terminated by
- * either '=' or '\0'.
- */
-
-STATIC int
-strequal(const char *p, const char *q)
-{
-	while (*p == *q++) {
-		if (*p++ == '=')
-			return 1;
-	}
-	if (*p == '=' && *(q - 1) == '\0')
-		return 1;
-	return 0;
-}
-
-/*
- * Search for a variable.
- * 'name' may be terminated by '=' or a NUL.
- * vppp is set to the pointer to vp, or the list head if vp isn't found
- * lenp is set to the number of charactets in 'name'
- */
-
-STATIC struct var *
-find_var(const char *name, struct var ***vppp, int *lenp)
-{
-	unsigned int hashval;
-	int len;
-	struct var *vp, **vpp;
-	const char *p = name;
-
-	hashval = 0;
-	while (*p && *p != '=')
-		hashval = 2 * hashval + (unsigned char)*p++;
-	len = p - name;
-
-	if (lenp)
-		*lenp = len;
-	vpp = &vartab[hashval % VTABSIZE];
-	if (vppp)
-		*vppp = vpp;
-
-	for (vp = *vpp ; vp ; vpp = &vp->next, vp = *vpp) {
-		if (vp->name_len != len)
-			continue;
-		if (memcmp(vp->text, name, len) != 0)
-			continue;
-		if (vppp)
-			*vppp = vpp;
-		return vp;
-	}
-	return NULL;
-}
diff --git a/sh/var.h b/sh/var.h
deleted file mode 100644
index b7b7db8..0000000
--- a/sh/var.h
+++ /dev/null
@@ -1,131 +0,0 @@
-/*	$NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl Exp $	*/
-
-/*-
- * Copyright (c) 1991, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- *	@(#)var.h	8.2 (Berkeley) 5/4/95
- */
-
-/*
- * Shell variables.
- */
-
-/* flags */
-#define VEXPORT		0x01	/* variable is exported */
-#define VREADONLY	0x02	/* variable cannot be modified */
-#define VSTRFIXED	0x04	/* variable struct is statically allocated */
-#define VTEXTFIXED	0x08	/* text is statically allocated */
-#define VSTACK		0x10	/* text is allocated on the stack */
-#define VUNSET		0x20	/* the variable is not set */
-#define VNOFUNC		0x40	/* don't call the callback function */
-#define VNOSET		0x80	/* do not set variable - just readonly test */
-
-
-struct var {
-	struct var *next;		/* next entry in hash list */
-	int flags;			/* flags are defined above */
-	char *text;			/* name=value */
-	int name_len;			/* length of name */
-	void (*func)(const char *);
-					/* function to be called when  */
-					/* the variable gets set/unset */
-};
-
-
-struct localvar {
-	struct localvar *next;		/* next local variable in list */
-	struct var *vp;			/* the variable that was made local */
-	int flags;			/* saved flags */
-	char *text;			/* saved text */
-};
-
-
-struct localvar *localvars;
-
-#if ATTY
-extern struct var vatty;
-#endif
-extern struct var vifs;
-extern struct var vmpath;
-extern struct var vpath;
-extern struct var vps1;
-extern struct var vps2;
-extern struct var vps4;
-#ifdef WITH_HISTORY 
-extern struct var vterm;
-extern struct var vtermcap;
-extern struct var vhistsize;
-#endif
-
-/*
- * The following macros access the values of the above variables.
- * They have to skip over the name.  They return the null string
- * for unset variables.
- */
-
-#define ifsval()	(vifs.text + 4)
-#define ifsset()	((vifs.flags & VUNSET) == 0)
-#define mpathval()	(vmpath.text + 9)
-#define pathval()	(vpath.text + 5)
-#define ps1val()	(vps1.text + 4)
-#define ps2val()	(vps2.text + 4)
-#define ps4val()	(vps4.text + 4)
-#define optindval()	(voptind.text + 7)
-#ifdef WITH_HISTORY
-#define histsizeval()	(vhistsize.text + 9)
-#define termval()	(vterm.text + 5)
-#endif
-
-#if ATTY
-#define attyset()	((vatty.flags & VUNSET) == 0)
-#endif
-#define mpathset()	((vmpath.flags & VUNSET) == 0)
-
-void initvar(void);
-void setvar(const char *, const char *, int);
-void setvareq(char *, int);
-struct strlist;
-void listsetvar(struct strlist *, int);
-char *lookupvar(const char *);
-char *bltinlookup(const char *, int);
-char **environment(void);
-void shprocvar(void);
-int showvars(const char *, int, int);
-int exportcmd(int, char **);
-int localcmd(int, char **);
-void mklocal(const char *, int);
-void listmklocal(struct strlist *, int);
-void poplocalvars(void);
-int setvarcmd(int, char **);
-int unsetcmd(int, char **);
-int unsetvar(const char *, int);
-int setvarsafe(const char *, const char *, int);
-void print_quoted(const char *);