auto import from //depot/cupcake/@135843
diff --git a/toolbox/dd.c b/toolbox/dd.c
new file mode 100644
index 0000000..c6af3ea
--- /dev/null
+++ b/toolbox/dd.c
@@ -0,0 +1,1358 @@
+/* $NetBSD: dd.c,v 1.37 2004/01/17 21:00:16 dbj Exp $ */
+
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Keith Muller of the University of California, San Diego and Lance
+ * Visser of Convex Computer Corporation.
+ *
+ * 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, 1994\n\
+ The Regents of the University of California. All rights reserved.\n");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)dd.c 8.5 (Berkeley) 4/2/94";
+#else
+__RCSID("$NetBSD: dd.c,v 1.37 2004/01/17 21:00:16 dbj Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "dd.h"
+
+#define NO_CONV
+
+//#include "extern.h"
+void block(void);
+void block_close(void);
+void dd_out(int);
+void def(void);
+void def_close(void);
+void jcl(char **);
+void pos_in(void);
+void pos_out(void);
+void summary(void);
+void summaryx(int);
+void terminate(int);
+void unblock(void);
+void unblock_close(void);
+ssize_t bwrite(int, const void *, size_t);
+
+extern IO in, out;
+extern STAT st;
+extern void (*cfunc)(void);
+extern uint64_t cpy_cnt;
+extern uint64_t cbsz;
+extern u_int ddflags;
+extern u_int files_cnt;
+extern int progress;
+extern const u_char *ctab;
+extern const u_char a2e_32V[], a2e_POSIX[];
+extern const u_char e2a_32V[], e2a_POSIX[];
+extern const u_char a2ibm_32V[], a2ibm_POSIX[];
+extern u_char casetab[];
+
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+static void dd_close(void);
+static void dd_in(void);
+static void getfdtype(IO *);
+static int redup_clean_fd(int);
+static void setup(void);
+
+
+IO in, out; /* input/output state */
+STAT st; /* statistics */
+void (*cfunc)(void); /* conversion function */
+uint64_t cpy_cnt; /* # of blocks to copy */
+static off_t pending = 0; /* pending seek if sparse */
+u_int ddflags; /* conversion options */
+uint64_t cbsz; /* conversion block size */
+u_int files_cnt = 1; /* # of files to copy */
+int progress = 0; /* display sign of life */
+const u_char *ctab; /* conversion table */
+sigset_t infoset; /* a set blocking SIGINFO */
+
+int
+dd_main(int argc, char *argv[])
+{
+ int ch;
+
+ while ((ch = getopt(argc, argv, "")) != -1) {
+ switch (ch) {
+ default:
+ fprintf(stderr, "usage: dd [operand ...]\n");
+ exit(1);
+ /* NOTREACHED */
+ }
+ }
+ argc -= (optind - 1);
+ argv += (optind - 1);
+
+ jcl(argv);
+ setup();
+
+// (void)signal(SIGINFO, summaryx);
+ (void)signal(SIGINT, terminate);
+ (void)sigemptyset(&infoset);
+// (void)sigaddset(&infoset, SIGINFO);
+
+ (void)atexit(summary);
+
+ while (files_cnt--)
+ dd_in();
+
+ dd_close();
+ exit(0);
+ /* NOTREACHED */
+}
+
+static void
+setup(void)
+{
+
+ if (in.name == NULL) {
+ in.name = "stdin";
+ in.fd = STDIN_FILENO;
+ } else {
+ in.fd = open(in.name, O_RDONLY, 0);
+ if (in.fd < 0) {
+ fprintf(stderr, "%s: cannot open for read: %s\n",
+ in.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ /* Ensure in.fd is outside the stdio descriptor range */
+ in.fd = redup_clean_fd(in.fd);
+ }
+
+ getfdtype(&in);
+
+ if (files_cnt > 1 && !(in.flags & ISTAPE)) {
+ fprintf(stderr,
+ "files is not supported for non-tape devices\n");
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ if (out.name == NULL) {
+ /* No way to check for read access here. */
+ out.fd = STDOUT_FILENO;
+ out.name = "stdout";
+ } else {
+#define OFLAGS \
+ (O_CREAT | (ddflags & (C_SEEK | C_NOTRUNC) ? 0 : O_TRUNC))
+ out.fd = open(out.name, O_RDWR | OFLAGS /*, DEFFILEMODE */);
+ /*
+ * May not have read access, so try again with write only.
+ * Without read we may have a problem if output also does
+ * not support seeks.
+ */
+ if (out.fd < 0) {
+ out.fd = open(out.name, O_WRONLY | OFLAGS /*, DEFFILEMODE */);
+ out.flags |= NOREAD;
+ }
+ if (out.fd < 0) {
+ fprintf(stderr, "%s: cannot open for write: %s\n",
+ out.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ /* Ensure out.fd is outside the stdio descriptor range */
+ out.fd = redup_clean_fd(out.fd);
+ }
+
+ getfdtype(&out);
+
+ /*
+ * Allocate space for the input and output buffers. If not doing
+ * record oriented I/O, only need a single buffer.
+ */
+ if (!(ddflags & (C_BLOCK|C_UNBLOCK))) {
+ if ((in.db = malloc(out.dbsz + in.dbsz - 1)) == NULL) {
+ exit(1);
+ /* NOTREACHED */
+ }
+ out.db = in.db;
+ } else if ((in.db =
+ malloc((u_int)(MAX(in.dbsz, cbsz) + cbsz))) == NULL ||
+ (out.db = malloc((u_int)(out.dbsz + cbsz))) == NULL) {
+ exit(1);
+ /* NOTREACHED */
+ }
+ in.dbp = in.db;
+ out.dbp = out.db;
+
+ /* Position the input/output streams. */
+ if (in.offset)
+ pos_in();
+ if (out.offset)
+ pos_out();
+
+ /*
+ * Truncate the output file; ignore errors because it fails on some
+ * kinds of output files, tapes, for example.
+ */
+ if ((ddflags & (C_OF | C_SEEK | C_NOTRUNC)) == (C_OF | C_SEEK))
+ (void)ftruncate(out.fd, (off_t)out.offset * out.dbsz);
+
+ /*
+ * If converting case at the same time as another conversion, build a
+ * table that does both at once. If just converting case, use the
+ * built-in tables.
+ */
+ if (ddflags & (C_LCASE|C_UCASE)) {
+#ifdef NO_CONV
+ /* Should not get here, but just in case... */
+ fprintf(stderr, "case conv and -DNO_CONV\n");
+ exit(1);
+ /* NOTREACHED */
+#else /* NO_CONV */
+ u_int cnt;
+
+ if (ddflags & C_ASCII || ddflags & C_EBCDIC) {
+ if (ddflags & C_LCASE) {
+ for (cnt = 0; cnt < 0377; ++cnt)
+ casetab[cnt] = tolower(ctab[cnt]);
+ } else {
+ for (cnt = 0; cnt < 0377; ++cnt)
+ casetab[cnt] = toupper(ctab[cnt]);
+ }
+ } else {
+ if (ddflags & C_LCASE) {
+ for (cnt = 0; cnt < 0377; ++cnt)
+ casetab[cnt] = tolower(cnt);
+ } else {
+ for (cnt = 0; cnt < 0377; ++cnt)
+ casetab[cnt] = toupper(cnt);
+ }
+ }
+
+ ctab = casetab;
+#endif /* NO_CONV */
+ }
+
+ (void)gettimeofday(&st.start, NULL); /* Statistics timestamp. */
+}
+
+static void
+getfdtype(IO *io)
+{
+// struct mtget mt;
+ struct stat sb;
+
+ if (fstat(io->fd, &sb)) {
+ fprintf(stderr, "%s: cannot fstat: %s\n",
+ io->name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+ if (S_ISCHR(sb.st_mode))
+ io->flags |= /*ioctl(io->fd, MTIOCGET, &mt) ? ISCHR : ISTAPE; */ ISCHR;
+ else if (lseek(io->fd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE)
+ io->flags |= ISPIPE; /* XXX fixed in 4.4BSD */
+}
+
+/*
+ * Move the parameter file descriptor to a descriptor that is outside the
+ * stdio descriptor range, if necessary. This is required to avoid
+ * accidentally outputting completion or error messages into the
+ * output file that were intended for the tty.
+ */
+static int
+redup_clean_fd(int fd)
+{
+ int newfd;
+
+ if (fd != STDIN_FILENO && fd != STDOUT_FILENO &&
+ fd != STDERR_FILENO)
+ /* File descriptor is ok, return immediately. */
+ return fd;
+
+ /*
+ * 3 is the first descriptor greater than STD*_FILENO. Any
+ * free descriptor valued 3 or above is acceptable...
+ */
+ newfd = fcntl(fd, F_DUPFD, 3);
+ if (newfd < 0) {
+ fprintf(stderr, "dupfd IO: %s\n", strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ close(fd);
+
+ return newfd;
+}
+
+static void
+dd_in(void)
+{
+ int flags;
+ int64_t n;
+
+ for (flags = ddflags;;) {
+ if (cpy_cnt && (st.in_full + st.in_part) >= cpy_cnt)
+ return;
+
+ /*
+ * Clear the buffer first if doing "sync" on input.
+ * If doing block operations use spaces. This will
+ * affect not only the C_NOERROR case, but also the
+ * last partial input block which should be padded
+ * with zero and not garbage.
+ */
+ if (flags & C_SYNC) {
+ if (flags & (C_BLOCK|C_UNBLOCK))
+ (void)memset(in.dbp, ' ', in.dbsz);
+ else
+ (void)memset(in.dbp, 0, in.dbsz);
+ }
+
+ n = read(in.fd, in.dbp, in.dbsz);
+ if (n == 0) {
+ in.dbrcnt = 0;
+ return;
+ }
+
+ /* Read error. */
+ if (n < 0) {
+
+ /*
+ * If noerror not specified, die. POSIX requires that
+ * the warning message be followed by an I/O display.
+ */
+ fprintf(stderr, "%s: read error: %s\n",
+ in.name, strerror(errno));
+ if (!(flags & C_NOERROR)) {
+ exit(1);
+ /* NOTREACHED */
+ }
+ summary();
+
+ /*
+ * If it's not a tape drive or a pipe, seek past the
+ * error. If your OS doesn't do the right thing for
+ * raw disks this section should be modified to re-read
+ * in sector size chunks.
+ */
+ if (!(in.flags & (ISPIPE|ISTAPE)) &&
+ lseek(in.fd, (off_t)in.dbsz, SEEK_CUR))
+ fprintf(stderr, "%s: seek error: %s\n",
+ in.name, strerror(errno));
+
+ /* If sync not specified, omit block and continue. */
+ if (!(ddflags & C_SYNC))
+ continue;
+
+ /* Read errors count as full blocks. */
+ in.dbcnt += in.dbrcnt = in.dbsz;
+ ++st.in_full;
+
+ /* Handle full input blocks. */
+ } else if (n == in.dbsz) {
+ in.dbcnt += in.dbrcnt = n;
+ ++st.in_full;
+
+ /* Handle partial input blocks. */
+ } else {
+ /* If sync, use the entire block. */
+ if (ddflags & C_SYNC)
+ in.dbcnt += in.dbrcnt = in.dbsz;
+ else
+ in.dbcnt += in.dbrcnt = n;
+ ++st.in_part;
+ }
+
+ /*
+ * POSIX states that if bs is set and no other conversions
+ * than noerror, notrunc or sync are specified, the block
+ * is output without buffering as it is read.
+ */
+ if (ddflags & C_BS) {
+ out.dbcnt = in.dbcnt;
+ dd_out(1);
+ in.dbcnt = 0;
+ continue;
+ }
+
+/* if (ddflags & C_SWAB) {
+ if ((n = in.dbrcnt) & 1) {
+ ++st.swab;
+ --n;
+ }
+ swab(in.dbp, in.dbp, n);
+ }
+*/
+ in.dbp += in.dbrcnt;
+ (*cfunc)();
+ }
+}
+
+/*
+ * Cleanup any remaining I/O and flush output. If necesssary, output file
+ * is truncated.
+ */
+static void
+dd_close(void)
+{
+
+ if (cfunc == def)
+ def_close();
+ else if (cfunc == block)
+ block_close();
+ else if (cfunc == unblock)
+ unblock_close();
+ if (ddflags & C_OSYNC && out.dbcnt < out.dbsz) {
+ (void)memset(out.dbp, 0, out.dbsz - out.dbcnt);
+ out.dbcnt = out.dbsz;
+ }
+ /* If there are pending sparse blocks, make sure
+ * to write out the final block un-sparse
+ */
+ if ((out.dbcnt == 0) && pending) {
+ memset(out.db, 0, out.dbsz);
+ out.dbcnt = out.dbsz;
+ out.dbp = out.db + out.dbcnt;
+ pending -= out.dbsz;
+ }
+ if (out.dbcnt)
+ dd_out(1);
+
+ /*
+ * Reporting nfs write error may be defered until next
+ * write(2) or close(2) system call. So, we need to do an
+ * extra check. If an output is stdout, the file structure
+ * may be shared among with other processes and close(2) just
+ * decreases the reference count.
+ */
+ if (out.fd == STDOUT_FILENO && fsync(out.fd) == -1 && errno != EINVAL) {
+ fprintf(stderr, "fsync stdout: %s\n", strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+ if (close(out.fd) == -1) {
+ fprintf(stderr, "close: %s\n", strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+}
+
+void
+dd_out(int force)
+{
+ static int warned;
+ int64_t cnt, n, nw;
+ u_char *outp;
+
+ /*
+ * Write one or more blocks out. The common case is writing a full
+ * output block in a single write; increment the full block stats.
+ * Otherwise, we're into partial block writes. If a partial write,
+ * and it's a character device, just warn. If a tape device, quit.
+ *
+ * The partial writes represent two cases. 1: Where the input block
+ * was less than expected so the output block was less than expected.
+ * 2: Where the input block was the right size but we were forced to
+ * write the block in multiple chunks. The original versions of dd(1)
+ * never wrote a block in more than a single write, so the latter case
+ * never happened.
+ *
+ * One special case is if we're forced to do the write -- in that case
+ * we play games with the buffer size, and it's usually a partial write.
+ */
+ outp = out.db;
+ for (n = force ? out.dbcnt : out.dbsz;; n = out.dbsz) {
+ for (cnt = n;; cnt -= nw) {
+
+ if (!force && ddflags & C_SPARSE) {
+ int sparse, i;
+ sparse = 1; /* Is buffer sparse? */
+ for (i = 0; i < cnt; i++)
+ if (outp[i] != 0) {
+ sparse = 0;
+ break;
+ }
+ if (sparse) {
+ pending += cnt;
+ outp += cnt;
+ nw = 0;
+ break;
+ }
+ }
+ if (pending != 0) {
+ if (lseek(out.fd, pending, SEEK_CUR) ==
+ -1) {
+ fprintf(stderr,
+ "%s: seek error creating "
+ "sparse file: %s\n",
+ out.name, strerror(errno));
+ exit(1);
+ }
+ }
+ nw = bwrite(out.fd, outp, cnt);
+ if (nw <= 0) {
+ if (nw == 0) {
+ fprintf(stderr, "%s: end of device\n",
+ out.name);
+ exit(1);
+ /* NOTREACHED */
+ }
+ if (errno != EINTR) {
+ fprintf(stderr, "%s: write error: %s\n",
+ out.name, strerror(errno));
+ /* NOTREACHED */
+ exit(1);
+ }
+ nw = 0;
+ }
+ if (pending) {
+ st.bytes += pending;
+ st.sparse += pending/out.dbsz;
+ st.out_full += pending/out.dbsz;
+ pending = 0;
+ }
+ outp += nw;
+ st.bytes += nw;
+ if (nw == n) {
+ if (n != out.dbsz)
+ ++st.out_part;
+ else
+ ++st.out_full;
+ break;
+ }
+ ++st.out_part;
+ if (nw == cnt)
+ break;
+ if (out.flags & ISCHR && !warned) {
+ warned = 1;
+ fprintf(stderr, "%s: short write on character "
+ "device\n", out.name);
+ }
+ if (out.flags & ISTAPE) {
+ fprintf(stderr,
+ "%s: short write on tape device",
+ out.name);
+ exit(1);
+ /* NOTREACHED */
+ }
+ }
+ if ((out.dbcnt -= n) < out.dbsz)
+ break;
+ }
+
+ /* Reassemble the output block. */
+ if (out.dbcnt)
+ (void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt);
+ out.dbp = out.db + out.dbcnt;
+
+ if (progress)
+ (void)write(STDERR_FILENO, ".", 1);
+}
+
+/*
+ * A protected against SIGINFO write
+ */
+ssize_t
+bwrite(int fd, const void *buf, size_t len)
+{
+ sigset_t oset;
+ ssize_t rv;
+ int oerrno;
+
+ (void)sigprocmask(SIG_BLOCK, &infoset, &oset);
+ rv = write(fd, buf, len);
+ oerrno = errno;
+ (void)sigprocmask(SIG_SETMASK, &oset, NULL);
+ errno = oerrno;
+ return (rv);
+}
+
+/*
+ * Position input/output data streams before starting the copy. Device type
+ * dependent. Seekable devices use lseek, and the rest position by reading.
+ * Seeking past the end of file can cause null blocks to be written to the
+ * output.
+ */
+void
+pos_in(void)
+{
+ int bcnt, cnt, nr, warned;
+
+ /* If not a pipe or tape device, try to seek on it. */
+ if (!(in.flags & (ISPIPE|ISTAPE))) {
+ if (lseek(in.fd,
+ (off_t)in.offset * (off_t)in.dbsz, SEEK_CUR) == -1) {
+ fprintf(stderr, "%s: seek error: %s",
+ in.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+ return;
+ /* NOTREACHED */
+ }
+
+ /*
+ * Read the data. If a pipe, read until satisfy the number of bytes
+ * being skipped. No differentiation for reading complete and partial
+ * blocks for other devices.
+ */
+ for (bcnt = in.dbsz, cnt = in.offset, warned = 0; cnt;) {
+ if ((nr = read(in.fd, in.db, bcnt)) > 0) {
+ if (in.flags & ISPIPE) {
+ if (!(bcnt -= nr)) {
+ bcnt = in.dbsz;
+ --cnt;
+ }
+ } else
+ --cnt;
+ continue;
+ }
+
+ if (nr == 0) {
+ if (files_cnt > 1) {
+ --files_cnt;
+ continue;
+ }
+ fprintf(stderr, "skip reached end of input\n");
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ /*
+ * Input error -- either EOF with no more files, or I/O error.
+ * If noerror not set die. POSIX requires that the warning
+ * message be followed by an I/O display.
+ */
+ if (ddflags & C_NOERROR) {
+ if (!warned) {
+
+ fprintf(stderr, "%s: error occurred\n",
+ in.name);
+ warned = 1;
+ summary();
+ }
+ continue;
+ }
+ fprintf(stderr, "%s: read error: %s", in.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+}
+
+void
+pos_out(void)
+{
+// struct mtop t_op;
+ int cnt, n;
+
+ /*
+ * If not a tape, try seeking on the file. Seeking on a pipe is
+ * going to fail, but don't protect the user -- they shouldn't
+ * have specified the seek operand.
+ */
+ if (!(out.flags & ISTAPE)) {
+ if (lseek(out.fd,
+ (off_t)out.offset * (off_t)out.dbsz, SEEK_SET) == -1) {
+ fprintf(stderr, "%s: seek error: %s\n",
+ out.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+ return;
+ }
+
+ /* If no read access, try using mtio. */
+ if (out.flags & NOREAD) {
+/* t_op.mt_op = MTFSR;
+ t_op.mt_count = out.offset;
+
+ if (ioctl(out.fd, MTIOCTOP, &t_op) < 0)*/
+ fprintf(stderr, "%s: cannot read", out.name);
+ exit(1);
+ /* NOTREACHED */
+ return;
+ }
+
+ /* Read it. */
+ for (cnt = 0; cnt < out.offset; ++cnt) {
+ if ((n = read(out.fd, out.db, out.dbsz)) > 0)
+ continue;
+
+ if (n < 0) {
+ fprintf(stderr, "%s: cannot position by reading: %s\n",
+ out.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ /*
+ * If reach EOF, fill with NUL characters; first, back up over
+ * the EOF mark. Note, cnt has not yet been incremented, so
+ * the EOF read does not count as a seek'd block.
+ */
+/* t_op.mt_op = MTBSR;
+ t_op.mt_count = 1;
+ if (ioctl(out.fd, MTIOCTOP, &t_op) == -1) */ {
+ fprintf(stderr, "%s: cannot position\n", out.name);
+ exit(1);
+ /* NOTREACHED */
+ }
+
+ while (cnt++ < out.offset)
+ if ((n = bwrite(out.fd, out.db, out.dbsz)) != out.dbsz) {
+ fprintf(stderr, "%s: cannot position "
+ "by writing: %s\n",
+ out.name, strerror(errno));
+ exit(1);
+ /* NOTREACHED */
+ }
+ break;
+ }
+}
+
+/*
+ * def --
+ * Copy input to output. Input is buffered until reaches obs, and then
+ * output until less than obs remains. Only a single buffer is used.
+ * Worst case buffer calculation is (ibs + obs - 1).
+ */
+void
+def(void)
+{
+ uint64_t cnt;
+ u_char *inp;
+ const u_char *t;
+
+ if ((t = ctab) != NULL)
+ for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
+ *inp = t[*inp];
+
+ /* Make the output buffer look right. */
+ out.dbp = in.dbp;
+ out.dbcnt = in.dbcnt;
+
+ if (in.dbcnt >= out.dbsz) {
+ /* If the output buffer is full, write it. */
+ dd_out(0);
+
+ /*
+ * Ddout copies the leftover output to the beginning of
+ * the buffer and resets the output buffer. Reset the
+ * input buffer to match it.
+ */
+ in.dbp = out.dbp;
+ in.dbcnt = out.dbcnt;
+ }
+}
+
+void
+def_close(void)
+{
+
+ /* Just update the count, everything is already in the buffer. */
+ if (in.dbcnt)
+ out.dbcnt = in.dbcnt;
+}
+
+#ifdef NO_CONV
+/* Build a smaller version (i.e. for a miniroot) */
+/* These can not be called, but just in case... */
+static const char no_block[] = "unblock and -DNO_CONV?\n";
+void block(void) { fprintf(stderr, "%s", no_block + 2); exit(1); }
+void block_close(void) { fprintf(stderr, "%s", no_block + 2); exit(1); }
+void unblock(void) { fprintf(stderr, "%s", no_block); exit(1); }
+void unblock_close(void) { fprintf(stderr, "%s", no_block); exit(1); }
+#else /* NO_CONV */
+
+/*
+ * Copy variable length newline terminated records with a max size cbsz
+ * bytes to output. Records less than cbs are padded with spaces.
+ *
+ * max in buffer: MAX(ibs, cbsz)
+ * max out buffer: obs + cbsz
+ */
+void
+block(void)
+{
+ static int intrunc;
+ int ch = 0; /* pacify gcc */
+ uint64_t cnt, maxlen;
+ u_char *inp, *outp;
+ const u_char *t;
+
+ /*
+ * Record truncation can cross block boundaries. If currently in a
+ * truncation state, keep tossing characters until reach a newline.
+ * Start at the beginning of the buffer, as the input buffer is always
+ * left empty.
+ */
+ if (intrunc) {
+ for (inp = in.db, cnt = in.dbrcnt;
+ cnt && *inp++ != '\n'; --cnt);
+ if (!cnt) {
+ in.dbcnt = 0;
+ in.dbp = in.db;
+ return;
+ }
+ intrunc = 0;
+ /* Adjust the input buffer numbers. */
+ in.dbcnt = cnt - 1;
+ in.dbp = inp + cnt - 1;
+ }
+
+ /*
+ * Copy records (max cbsz size chunks) into the output buffer. The
+ * translation is done as we copy into the output buffer.
+ */
+ for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
+ maxlen = MIN(cbsz, in.dbcnt);
+ if ((t = ctab) != NULL)
+ for (cnt = 0;
+ cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
+ *outp++ = t[ch];
+ else
+ for (cnt = 0;
+ cnt < maxlen && (ch = *inp++) != '\n'; ++cnt)
+ *outp++ = ch;
+ /*
+ * Check for short record without a newline. Reassemble the
+ * input block.
+ */
+ if (ch != '\n' && in.dbcnt < cbsz) {
+ (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
+ break;
+ }
+
+ /* Adjust the input buffer numbers. */
+ in.dbcnt -= cnt;
+ if (ch == '\n')
+ --in.dbcnt;
+
+ /* Pad short records with spaces. */
+ if (cnt < cbsz)
+ (void)memset(outp, ctab ? ctab[' '] : ' ', cbsz - cnt);
+ else {
+ /*
+ * If the next character wouldn't have ended the
+ * block, it's a truncation.
+ */
+ if (!in.dbcnt || *inp != '\n')
+ ++st.trunc;
+
+ /* Toss characters to a newline. */
+ for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
+ if (!in.dbcnt)
+ intrunc = 1;
+ else
+ --in.dbcnt;
+ }
+
+ /* Adjust output buffer numbers. */
+ out.dbp += cbsz;
+ if ((out.dbcnt += cbsz) >= out.dbsz)
+ dd_out(0);
+ outp = out.dbp;
+ }
+ in.dbp = in.db + in.dbcnt;
+}
+
+void
+block_close(void)
+{
+
+ /*
+ * Copy any remaining data into the output buffer and pad to a record.
+ * Don't worry about truncation or translation, the input buffer is
+ * always empty when truncating, and no characters have been added for
+ * translation. The bottom line is that anything left in the input
+ * buffer is a truncated record. Anything left in the output buffer
+ * just wasn't big enough.
+ */
+ if (in.dbcnt) {
+ ++st.trunc;
+ (void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
+ (void)memset(out.dbp + in.dbcnt,
+ ctab ? ctab[' '] : ' ', cbsz - in.dbcnt);
+ out.dbcnt += cbsz;
+ }
+}
+
+/*
+ * Convert fixed length (cbsz) records to variable length. Deletes any
+ * trailing blanks and appends a newline.
+ *
+ * max in buffer: MAX(ibs, cbsz) + cbsz
+ * max out buffer: obs + cbsz
+ */
+void
+unblock(void)
+{
+ uint64_t cnt;
+ u_char *inp;
+ const u_char *t;
+
+ /* Translation and case conversion. */
+ if ((t = ctab) != NULL)
+ for (cnt = in.dbrcnt, inp = in.dbp - 1; cnt--; inp--)
+ *inp = t[*inp];
+ /*
+ * Copy records (max cbsz size chunks) into the output buffer. The
+ * translation has to already be done or we might not recognize the
+ * spaces.
+ */
+ for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
+ for (t = inp + cbsz - 1; t >= inp && *t == ' '; --t);
+ if (t >= inp) {
+ cnt = t - inp + 1;
+ (void)memmove(out.dbp, inp, cnt);
+ out.dbp += cnt;
+ out.dbcnt += cnt;
+ }
+ ++out.dbcnt;
+ *out.dbp++ = '\n';
+ if (out.dbcnt >= out.dbsz)
+ dd_out(0);
+ }
+ if (in.dbcnt)
+ (void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
+ in.dbp = in.db + in.dbcnt;
+}
+
+void
+unblock_close(void)
+{
+ uint64_t cnt;
+ u_char *t;
+
+ if (in.dbcnt) {
+ warnx("%s: short input record", in.name);
+ for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t);
+ if (t >= in.db) {
+ cnt = t - in.db + 1;
+ (void)memmove(out.dbp, in.db, cnt);
+ out.dbp += cnt;
+ out.dbcnt += cnt;
+ }
+ ++out.dbcnt;
+ *out.dbp++ = '\n';
+ }
+}
+
+#endif /* NO_CONV */
+
+#define tv2mS(tv) ((tv).tv_sec * 1000LL + ((tv).tv_usec + 500) / 1000)
+
+void
+summary(void)
+{
+ char buf[100];
+ int64_t mS;
+ struct timeval tv;
+
+ if (progress)
+ (void)write(STDERR_FILENO, "\n", 1);
+
+ (void)gettimeofday(&tv, NULL);
+ mS = tv2mS(tv) - tv2mS(st.start);
+ if (mS == 0)
+ mS = 1;
+ /* Use snprintf(3) so that we don't reenter stdio(3). */
+ (void)snprintf(buf, sizeof(buf),
+ "%llu+%llu records in\n%llu+%llu records out\n",
+ (unsigned long long)st.in_full, (unsigned long long)st.in_part,
+ (unsigned long long)st.out_full, (unsigned long long)st.out_part);
+ (void)write(STDERR_FILENO, buf, strlen(buf));
+ if (st.swab) {
+ (void)snprintf(buf, sizeof(buf), "%llu odd length swab %s\n",
+ (unsigned long long)st.swab,
+ (st.swab == 1) ? "block" : "blocks");
+ (void)write(STDERR_FILENO, buf, strlen(buf));
+ }
+ if (st.trunc) {
+ (void)snprintf(buf, sizeof(buf), "%llu truncated %s\n",
+ (unsigned long long)st.trunc,
+ (st.trunc == 1) ? "block" : "blocks");
+ (void)write(STDERR_FILENO, buf, strlen(buf));
+ }
+ if (st.sparse) {
+ (void)snprintf(buf, sizeof(buf), "%llu sparse output %s\n",
+ (unsigned long long)st.sparse,
+ (st.sparse == 1) ? "block" : "blocks");
+ (void)write(STDERR_FILENO, buf, strlen(buf));
+ }
+ (void)snprintf(buf, sizeof(buf),
+ "%llu bytes transferred in %lu.%03d secs (%llu bytes/sec)\n",
+ (unsigned long long) st.bytes,
+ (long) (mS / 1000),
+ (int) (mS % 1000),
+ (unsigned long long) (st.bytes * 1000LL / mS));
+ (void)write(STDERR_FILENO, buf, strlen(buf));
+}
+
+void
+terminate(int notused)
+{
+
+ exit(0);
+ /* NOTREACHED */
+}
+
+static int c_arg(const void *, const void *);
+#ifndef NO_CONV
+static int c_conv(const void *, const void *);
+#endif
+static void f_bs(char *);
+static void f_cbs(char *);
+static void f_conv(char *);
+static void f_count(char *);
+static void f_files(char *);
+static void f_ibs(char *);
+static void f_if(char *);
+static void f_obs(char *);
+static void f_of(char *);
+static void f_seek(char *);
+static void f_skip(char *);
+static void f_progress(char *);
+
+static const struct arg {
+ const char *name;
+ void (*f)(char *);
+ u_int set, noset;
+} args[] = {
+ /* the array needs to be sorted by the first column so
+ bsearch() can be used to find commands quickly */
+ { "bs", f_bs, C_BS, C_BS|C_IBS|C_OBS|C_OSYNC },
+ { "cbs", f_cbs, C_CBS, C_CBS },
+ { "conv", f_conv, 0, 0 },
+ { "count", f_count, C_COUNT, C_COUNT },
+ { "files", f_files, C_FILES, C_FILES },
+ { "ibs", f_ibs, C_IBS, C_BS|C_IBS },
+ { "if", f_if, C_IF, C_IF },
+ { "obs", f_obs, C_OBS, C_BS|C_OBS },
+ { "of", f_of, C_OF, C_OF },
+ { "progress", f_progress, 0, 0 },
+ { "seek", f_seek, C_SEEK, C_SEEK },
+ { "skip", f_skip, C_SKIP, C_SKIP },
+};
+
+/*
+ * args -- parse JCL syntax of dd.
+ */
+void
+jcl(char **argv)
+{
+ struct arg *ap, tmp;
+ char *oper, *arg;
+
+ in.dbsz = out.dbsz = 512;
+
+ while ((oper = *++argv) != NULL) {
+ if ((arg = strchr(oper, '=')) == NULL) {
+ fprintf(stderr, "unknown operand %s\n", oper);
+ exit(1);
+ /* NOTREACHED */
+ }
+ *arg++ = '\0';
+ if (!*arg) {
+ fprintf(stderr, "no value specified for %s\n", oper);
+ exit(1);
+ /* NOTREACHED */
+ }
+ tmp.name = oper;
+ if (!(ap = (struct arg *)bsearch(&tmp, args,
+ sizeof(args)/sizeof(struct arg), sizeof(struct arg),
+ c_arg))) {
+ fprintf(stderr, "unknown operand %s\n", tmp.name);
+ exit(1);
+ /* NOTREACHED */
+ }
+ if (ddflags & ap->noset) {
+ fprintf(stderr,
+ "%s: illegal argument combination or already set\n",
+ tmp.name);
+ exit(1);
+ /* NOTREACHED */
+ }
+ ddflags |= ap->set;
+ ap->f(arg);
+ }
+
+ /* Final sanity checks. */
+
+ if (ddflags & C_BS) {
+ /*
+ * Bs is turned off by any conversion -- we assume the user
+ * just wanted to set both the input and output block sizes
+ * and didn't want the bs semantics, so we don't warn.
+ */
+ if (ddflags & (C_BLOCK | C_LCASE | C_SWAB | C_UCASE |
+ C_UNBLOCK | C_OSYNC | C_ASCII | C_EBCDIC | C_SPARSE)) {
+ ddflags &= ~C_BS;
+ ddflags |= C_IBS|C_OBS;
+ }
+
+ /* Bs supersedes ibs and obs. */
+ if (ddflags & C_BS && ddflags & (C_IBS|C_OBS))
+ fprintf(stderr, "bs supersedes ibs and obs\n");
+ }
+
+ /*
+ * Ascii/ebcdic and cbs implies block/unblock.
+ * Block/unblock requires cbs and vice-versa.
+ */
+ if (ddflags & (C_BLOCK|C_UNBLOCK)) {
+ if (!(ddflags & C_CBS)) {
+ fprintf(stderr, "record operations require cbs\n");
+ exit(1);
+ /* NOTREACHED */
+ }
+ cfunc = ddflags & C_BLOCK ? block : unblock;
+ } else if (ddflags & C_CBS) {
+ if (ddflags & (C_ASCII|C_EBCDIC)) {
+ if (ddflags & C_ASCII) {
+ ddflags |= C_UNBLOCK;
+ cfunc = unblock;
+ } else {
+ ddflags |= C_BLOCK;
+ cfunc = block;
+ }
+ } else {
+ fprintf(stderr,
+ "cbs meaningless if not doing record operations\n");
+ exit(1);
+ /* NOTREACHED */
+ }
+ } else
+ cfunc = def;
+
+ /* Read, write and seek calls take off_t as arguments.
+ *
+ * The following check is not done because an off_t is a quad
+ * for current NetBSD implementations.
+ *
+ * if (in.offset > INT_MAX/in.dbsz || out.offset > INT_MAX/out.dbsz)
+ * errx(1, "seek offsets cannot be larger than %d", INT_MAX);
+ */
+}
+
+static int
+c_arg(const void *a, const void *b)
+{
+
+ return (strcmp(((const struct arg *)a)->name,
+ ((const struct arg *)b)->name));
+}
+
+static long long strsuftoll(const char* name, const char* arg, int def, unsigned int max)
+{
+ long long result;
+
+ if (sscanf(arg, "%lld", &result) == 0)
+ result = def;
+ return result;
+}
+
+static void
+f_bs(char *arg)
+{
+
+ in.dbsz = out.dbsz = strsuftoll("block size", arg, 1, UINT_MAX);
+}
+
+static void
+f_cbs(char *arg)
+{
+
+ cbsz = strsuftoll("conversion record size", arg, 1, UINT_MAX);
+}
+
+static void
+f_count(char *arg)
+{
+
+ cpy_cnt = strsuftoll("block count", arg, 0, LLONG_MAX);
+ if (!cpy_cnt)
+ terminate(0);
+}
+
+static void
+f_files(char *arg)
+{
+
+ files_cnt = (u_int)strsuftoll("file count", arg, 0, UINT_MAX);
+ if (!files_cnt)
+ terminate(0);
+}
+
+static void
+f_ibs(char *arg)
+{
+
+ if (!(ddflags & C_BS))
+ in.dbsz = strsuftoll("input block size", arg, 1, UINT_MAX);
+}
+
+static void
+f_if(char *arg)
+{
+
+ in.name = arg;
+}
+
+static void
+f_obs(char *arg)
+{
+
+ if (!(ddflags & C_BS))
+ out.dbsz = strsuftoll("output block size", arg, 1, UINT_MAX);
+}
+
+static void
+f_of(char *arg)
+{
+
+ out.name = arg;
+}
+
+static void
+f_seek(char *arg)
+{
+
+ out.offset = strsuftoll("seek blocks", arg, 0, LLONG_MAX);
+}
+
+static void
+f_skip(char *arg)
+{
+
+ in.offset = strsuftoll("skip blocks", arg, 0, LLONG_MAX);
+}
+
+static void
+f_progress(char *arg)
+{
+
+ if (*arg != '0')
+ progress = 1;
+}
+
+#ifdef NO_CONV
+/* Build a small version (i.e. for a ramdisk root) */
+static void
+f_conv(char *arg)
+{
+
+ fprintf(stderr, "conv option disabled\n");
+ exit(1);
+ /* NOTREACHED */
+}
+#else /* NO_CONV */
+
+static const struct conv {
+ const char *name;
+ u_int set, noset;
+ const u_char *ctab;
+} clist[] = {
+ { "ascii", C_ASCII, C_EBCDIC, e2a_POSIX },
+ { "block", C_BLOCK, C_UNBLOCK, NULL },
+ { "ebcdic", C_EBCDIC, C_ASCII, a2e_POSIX },
+ { "ibm", C_EBCDIC, C_ASCII, a2ibm_POSIX },
+ { "lcase", C_LCASE, C_UCASE, NULL },
+ { "noerror", C_NOERROR, 0, NULL },
+ { "notrunc", C_NOTRUNC, 0, NULL },
+ { "oldascii", C_ASCII, C_EBCDIC, e2a_32V },
+ { "oldebcdic", C_EBCDIC, C_ASCII, a2e_32V },
+ { "oldibm", C_EBCDIC, C_ASCII, a2ibm_32V },
+ { "osync", C_OSYNC, C_BS, NULL },
+ { "sparse", C_SPARSE, 0, NULL },
+ { "swab", C_SWAB, 0, NULL },
+ { "sync", C_SYNC, 0, NULL },
+ { "ucase", C_UCASE, C_LCASE, NULL },
+ { "unblock", C_UNBLOCK, C_BLOCK, NULL },
+ /* If you add items to this table, be sure to add the
+ * conversions to the C_BS check in the jcl routine above.
+ */
+};
+
+static void
+f_conv(char *arg)
+{
+ struct conv *cp, tmp;
+
+ while (arg != NULL) {
+ tmp.name = strsep(&arg, ",");
+ if (!(cp = (struct conv *)bsearch(&tmp, clist,
+ sizeof(clist)/sizeof(struct conv), sizeof(struct conv),
+ c_conv))) {
+ errx(EXIT_FAILURE, "unknown conversion %s", tmp.name);
+ /* NOTREACHED */
+ }
+ if (ddflags & cp->noset) {
+ errx(EXIT_FAILURE, "%s: illegal conversion combination", tmp.name);
+ /* NOTREACHED */
+ }
+ ddflags |= cp->set;
+ if (cp->ctab)
+ ctab = cp->ctab;
+ }
+}
+
+static int
+c_conv(const void *a, const void *b)
+{
+
+ return (strcmp(((const struct conv *)a)->name,
+ ((const struct conv *)b)->name));
+}
+
+#endif /* NO_CONV */
+
+