| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* $NetBSD: error.h,v 1.16 2003/08/07 09:05:30 agc Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1991, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Kenneth Almquist. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * @(#)error.h 8.2 (Berkeley) 5/4/95 |
| 35 | */ |
| 36 | |
| 37 | #include <stdarg.h> |
| 38 | |
| 39 | /* |
| 40 | * Types of operations (passed to the errmsg routine). |
| 41 | */ |
| 42 | |
| 43 | #define E_OPEN 01 /* opening a file */ |
| 44 | #define E_CREAT 02 /* creating a file */ |
| 45 | #define E_EXEC 04 /* executing a program */ |
| 46 | |
| 47 | |
| 48 | /* |
| 49 | * We enclose jmp_buf in a structure so that we can declare pointers to |
| 50 | * jump locations. The global variable handler contains the location to |
| 51 | * jump to when an exception occurs, and the global variable exception |
| 52 | * contains a code identifying the exeception. To implement nested |
| 53 | * exception handlers, the user should save the value of handler on entry |
| 54 | * to an inner scope, set handler to point to a jmploc structure for the |
| 55 | * inner scope, and restore handler on exit from the scope. |
| 56 | */ |
| 57 | |
| 58 | #include <setjmp.h> |
| 59 | |
| 60 | struct jmploc { |
| 61 | jmp_buf loc; |
| 62 | }; |
| 63 | |
| 64 | extern struct jmploc *handler; |
| 65 | extern int exception; |
| 66 | extern int exerrno; /* error for EXEXEC */ |
| 67 | |
| 68 | /* exceptions */ |
| 69 | #define EXINT 0 /* SIGINT received */ |
| 70 | #define EXERROR 1 /* a generic error */ |
| 71 | #define EXSHELLPROC 2 /* execute a shell procedure */ |
| 72 | #define EXEXEC 3 /* command execution failed */ |
| 73 | |
| 74 | |
| 75 | /* |
| 76 | * These macros allow the user to suspend the handling of interrupt signals |
| 77 | * over a period of time. This is similar to SIGHOLD to or sigblock, but |
| 78 | * much more efficient and portable. (But hacking the kernel is so much |
| 79 | * more fun than worrying about efficiency and portability. :-)) |
| 80 | */ |
| 81 | |
| 82 | extern volatile int suppressint; |
| 83 | extern volatile int intpending; |
| 84 | |
| 85 | #define INTOFF suppressint++ |
| 86 | #define INTON { if (--suppressint == 0 && intpending) onint(); } |
| 87 | #define FORCEINTON {suppressint = 0; if (intpending) onint();} |
| 88 | #define CLEAR_PENDING_INT intpending = 0 |
| 89 | #define int_pending() intpending |
| 90 | |
| 91 | void exraise(int) __attribute__((__noreturn__)); |
| 92 | void onint(void); |
| 93 | void error(const char *, ...) __attribute__((__noreturn__)); |
| 94 | void exerror(int, const char *, ...) __attribute__((__noreturn__)); |
| 95 | const char *errmsg(int, int); |
| 96 | |
| 97 | void sh_err(int, const char *, ...) __attribute__((__noreturn__)); |
| 98 | void sh_verr(int, const char *, va_list) __attribute__((__noreturn__)); |
| 99 | void sh_errx(int, const char *, ...) __attribute__((__noreturn__)); |
| 100 | void sh_verrx(int, const char *, va_list) __attribute__((__noreturn__)); |
| 101 | void sh_warn(const char *, ...); |
| 102 | void sh_vwarn(const char *, va_list); |
| 103 | void sh_warnx(const char *, ...); |
| 104 | void sh_vwarnx(const char *, va_list); |
| 105 | |
| 106 | void sh_exit(int) __attribute__((__noreturn__)); |
| 107 | |
| 108 | |
| 109 | /* |
| 110 | * BSD setjmp saves the signal mask, which violates ANSI C and takes time, |
| 111 | * so we use _setjmp instead. |
| 112 | */ |
| 113 | |
| 114 | #if defined(BSD) && !defined(__SVR4) && !defined(__linux__) |
| 115 | #define setjmp(jmploc) _setjmp(jmploc) |
| 116 | #define longjmp(jmploc, val) _longjmp(jmploc, val) |
| 117 | #endif |