| 1 | /* Error handler for noninteractive utilities
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| 2 | Copyright (C) 1990-1998, 2000, 2001, 2002 Free Software Foundation, Inc.
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| 3 | This file is part of the GNU C Library. Its master source is NOT part of
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| 4 | the C library, however. The master source lives in /gd/gnu/lib.
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| 5 |
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| 6 | The GNU C Library is free software; you can redistribute it and/or
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| 7 | modify it under the terms of the GNU Lesser General Public
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| 8 | License as published by the Free Software Foundation; either
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| 9 | version 2.1 of the License, or (at your option) any later version.
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| 10 |
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| 11 | The GNU C Library is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 14 | Lesser General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU Lesser General Public
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| 17 | License along with the GNU C Library; if not, write to the Free
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| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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| 19 | 02111-1307 USA. */
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| 20 |
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| 21 | /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
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| 22 |
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| 23 | #ifdef HAVE_CONFIG_H
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| 24 | # include <config.h>
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| 25 | #endif
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| 26 |
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| 27 | #include <stdio.h>
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| 28 | #include <libintl.h>
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| 29 | #ifdef _LIBC
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| 30 | # include <wchar.h>
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| 31 | # define mbsrtowcs __mbsrtowcs
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| 32 | #endif
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| 33 |
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| 34 | #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
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| 35 | # if __STDC__
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| 36 | # include <stdarg.h>
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| 37 | # define VA_START(args, lastarg) va_start(args, lastarg)
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| 38 | # else
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| 39 | # include <varargs.h>
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| 40 | # define VA_START(args, lastarg) va_start(args)
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| 41 | # endif
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| 42 | #else
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| 43 | # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
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| 44 | # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
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| 45 | #endif
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| 46 |
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| 47 | #if STDC_HEADERS || _LIBC
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| 48 | # include <stdlib.h>
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| 49 | # include <string.h>
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| 50 | #else
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| 51 | void exit ();
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| 52 | #endif
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| 53 |
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| 54 | #include "error.h"
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| 55 |
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| 56 | #ifndef _
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| 57 | # define _(String) String
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| 58 | #endif
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| 59 |
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| 60 | /* If NULL, error will flush stdout, then print on stderr the program
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| 61 | name, a colon and a space. Otherwise, error will call this
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| 62 | function without parameters instead. */
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| 63 | void (*error_print_progname) (
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| 64 | #if __STDC__ - 0
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| 65 | void
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| 66 | #endif
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| 67 | );
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| 68 |
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| 69 | /* This variable is incremented each time `error' is called. */
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| 70 | unsigned int error_message_count;
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| 71 |
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| 72 | #ifdef _LIBC
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| 73 | /* In the GNU C library, there is a predefined variable for this. */
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| 74 |
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| 75 | # define program_name program_invocation_name
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| 76 | # include <errno.h>
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| 77 | # include <libio/libioP.h>
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| 78 |
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| 79 | /* In GNU libc we want do not want to use the common name `error' directly.
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| 80 | Instead make it a weak alias. */
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| 81 | extern void __error (int status, int errnum, const char *message, ...)
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| 82 | __attribute__ ((__format__ (__printf__, 3, 4)));
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| 83 | extern void __error_at_line (int status, int errnum, const char *file_name,
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| 84 | unsigned int line_number, const char *message,
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| 85 | ...)
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| 86 | __attribute__ ((__format__ (__printf__, 5, 6)));;
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| 87 | # define error __error
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| 88 | # define error_at_line __error_at_line
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| 89 |
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| 90 | # include <libio/iolibio.h>
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| 91 | # define fflush(s) INTUSE(_IO_fflush) (s)
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| 92 | # undef putc
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| 93 | # define putc(c, fp) INTUSE(_IO_putc) (c, fp)
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| 94 |
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| 95 | #else /* not _LIBC */
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| 96 |
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| 97 | # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
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| 98 | # ifndef HAVE_DECL_STRERROR_R
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| 99 | "this configure-time declaration test was not run"
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| 100 | # endif
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| 101 | char *strerror_r ();
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| 102 | # endif
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| 103 |
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| 104 | /* The calling program should define program_name and set it to the
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| 105 | name of the executing program. */
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| 106 | extern char *program_name;
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| 107 |
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| 108 | # if HAVE_STRERROR_R || defined strerror_r
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| 109 | # define __strerror_r strerror_r
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| 110 | # else
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| 111 | # if HAVE_STRERROR
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| 112 | # ifndef HAVE_DECL_STRERROR
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| 113 | "this configure-time declaration test was not run"
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| 114 | # endif
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| 115 | # if !HAVE_DECL_STRERROR
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| 116 | char *strerror ();
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| 117 | # endif
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| 118 | # else
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| 119 | static char *
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| 120 | private_strerror (int errnum)
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| 121 | {
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| 122 | extern char *sys_errlist[];
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| 123 | extern int sys_nerr;
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| 124 |
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| 125 | if (errnum > 0 && errnum <= sys_nerr)
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| 126 | return _(sys_errlist[errnum]);
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| 127 | return _("Unknown system error");
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| 128 | }
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| 129 | # define strerror private_strerror
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| 130 | # endif /* HAVE_STRERROR */
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| 131 | # endif /* HAVE_STRERROR_R || defined strerror_r */
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| 132 | #endif /* not _LIBC */
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| 133 |
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| 134 | static void
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| 135 | print_errno_message (int errnum)
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| 136 | {
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| 137 | char const *s;
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| 138 |
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| 139 | #if defined HAVE_STRERROR_R || _LIBC
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| 140 | char errbuf[1024];
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| 141 | # if STRERROR_R_CHAR_P || _LIBC
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| 142 | s = __strerror_r (errnum, errbuf, sizeof errbuf);
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| 143 | # else
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| 144 | if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
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| 145 | s = errbuf;
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| 146 | else
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| 147 | s = 0;
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| 148 | # endif
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| 149 | #else
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| 150 | s = strerror (errnum);
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| 151 | #endif
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| 152 |
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| 153 | #if !_LIBC
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| 154 | if (! s)
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| 155 | s = _("Unknown system error");
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| 156 | #endif
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| 157 |
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| 158 | #if _LIBC
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| 159 | if (_IO_fwide (stderr, 0) > 0)
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| 160 | {
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| 161 | __fwprintf (stderr, L": %s", s);
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| 162 | return;
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| 163 | }
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| 164 | #endif
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| 165 |
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| 166 | fprintf (stderr, ": %s", s);
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| 167 | }
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| 168 |
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| 169 | #ifdef VA_START
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| 170 | static void
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| 171 | error_tail (int status, int errnum, const char *message, va_list args)
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| 172 | {
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| 173 | # if HAVE_VPRINTF || _LIBC
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| 174 | # if _LIBC
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| 175 | if (_IO_fwide (stderr, 0) > 0)
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| 176 | {
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| 177 | # define ALLOCA_LIMIT 2000
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| 178 | size_t len = strlen (message) + 1;
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| 179 | wchar_t *wmessage = NULL;
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| 180 | mbstate_t st;
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| 181 | size_t res;
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| 182 | const char *tmp;
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| 183 |
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| 184 | do
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| 185 | {
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| 186 | if (len < ALLOCA_LIMIT)
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| 187 | wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
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| 188 | else
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| 189 | {
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| 190 | if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
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| 191 | wmessage = NULL;
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| 192 |
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| 193 | wmessage = (wchar_t *) realloc (wmessage,
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| 194 | len * sizeof (wchar_t));
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| 195 |
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| 196 | if (wmessage == NULL)
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| 197 | {
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| 198 | fputws_unlocked (L"out of memory\n", stderr);
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| 199 | return;
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | memset (&st, '\0', sizeof (st));
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| 204 | tmp =message;
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| 205 | }
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| 206 | while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
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| 207 |
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| 208 | if (res == (size_t) -1)
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| 209 | /* The string cannot be converted. */
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| 210 | wmessage = (wchar_t *) L"???";
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| 211 |
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| 212 | __vfwprintf (stderr, wmessage, args);
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| 213 | }
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| 214 | else
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| 215 | # endif
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| 216 | vfprintf (stderr, message, args);
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| 217 | # else
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| 218 | _doprnt (message, args, stderr);
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| 219 | # endif
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| 220 | va_end (args);
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| 221 |
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| 222 | ++error_message_count;
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| 223 | if (errnum)
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| 224 | print_errno_message (errnum);
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| 225 | # if _LIBC
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| 226 | if (_IO_fwide (stderr, 0) > 0)
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| 227 | putwc (L'\n', stderr);
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| 228 | else
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| 229 | # endif
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| 230 | putc ('\n', stderr);
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| 231 | fflush (stderr);
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| 232 | if (status)
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| 233 | exit (status);
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| 234 | }
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| 235 | #endif
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| 236 |
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| 237 |
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| 238 | /* Print the program name and error message MESSAGE, which is a printf-style
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| 239 | format string with optional args.
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| 240 | If ERRNUM is nonzero, print its corresponding system error message.
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| 241 | Exit with status STATUS if it is nonzero. */
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| 242 | /* VARARGS */
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| 243 | void
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| 244 | #if defined VA_START && __STDC__
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| 245 | error (int status, int errnum, const char *message, ...)
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| 246 | #else
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| 247 | error (status, errnum, message, va_alist)
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| 248 | int status;
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| 249 | int errnum;
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| 250 | char *message;
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| 251 | va_dcl
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| 252 | #endif
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| 253 | {
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| 254 | #ifdef VA_START
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| 255 | va_list args;
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| 256 | #endif
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| 257 |
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| 258 | fflush (stdout);
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| 259 | #ifdef _LIBC
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| 260 | _IO_flockfile (stderr);
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| 261 | #endif
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| 262 | if (error_print_progname)
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| 263 | (*error_print_progname) ();
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| 264 | else
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| 265 | {
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| 266 | #if _LIBC
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| 267 | if (_IO_fwide (stderr, 0) > 0)
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| 268 | __fwprintf (stderr, L"%s: ", program_name);
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| 269 | else
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| 270 | #endif
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| 271 | fprintf (stderr, "%s: ", program_name);
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| 272 | }
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| 273 |
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| 274 | #ifdef VA_START
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| 275 | VA_START (args, message);
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| 276 | error_tail (status, errnum, message, args);
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| 277 | #else
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| 278 | fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
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| 279 |
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| 280 | ++error_message_count;
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| 281 | if (errnum)
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| 282 | print_errno_message (errnum);
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| 283 | putc ('\n', stderr);
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| 284 | fflush (stderr);
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| 285 | if (status)
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| 286 | exit (status);
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| 287 | #endif
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| 288 |
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| 289 | #ifdef _LIBC
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| 290 | _IO_funlockfile (stderr);
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| 291 | #endif
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| 292 | }
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| 293 | |
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| 294 |
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| 295 | /* Sometimes we want to have at most one error per line. This
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| 296 | variable controls whether this mode is selected or not. */
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| 297 | int error_one_per_line;
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| 298 |
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| 299 | void
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| 300 | #if defined VA_START && __STDC__
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| 301 | error_at_line (int status, int errnum, const char *file_name,
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| 302 | unsigned int line_number, const char *message, ...)
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| 303 | #else
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| 304 | error_at_line (status, errnum, file_name, line_number, message, va_alist)
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| 305 | int status;
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| 306 | int errnum;
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| 307 | const char *file_name;
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| 308 | unsigned int line_number;
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| 309 | char *message;
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| 310 | va_dcl
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| 311 | #endif
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| 312 | {
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| 313 | #ifdef VA_START
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| 314 | va_list args;
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| 315 | #endif
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| 316 |
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| 317 | if (error_one_per_line)
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| 318 | {
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| 319 | static const char *old_file_name;
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| 320 | static unsigned int old_line_number;
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| 321 |
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| 322 | if (old_line_number == line_number
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| 323 | && (file_name == old_file_name
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| 324 | || strcmp (old_file_name, file_name) == 0))
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| 325 | /* Simply return and print nothing. */
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| 326 | return;
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| 327 |
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| 328 | old_file_name = file_name;
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| 329 | old_line_number = line_number;
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| 330 | }
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| 331 |
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| 332 | fflush (stdout);
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| 333 | #ifdef _LIBC
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| 334 | _IO_flockfile (stderr);
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| 335 | #endif
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| 336 | if (error_print_progname)
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| 337 | (*error_print_progname) ();
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| 338 | else
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| 339 | {
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| 340 | #if _LIBC
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| 341 | if (_IO_fwide (stderr, 0) > 0)
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| 342 | __fwprintf (stderr, L"%s: ", program_name);
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| 343 | else
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| 344 | #endif
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| 345 | fprintf (stderr, "%s:", program_name);
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| 346 | }
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| 347 |
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| 348 | if (file_name != NULL)
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| 349 | {
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| 350 | #if _LIBC
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| 351 | if (_IO_fwide (stderr, 0) > 0)
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| 352 | __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
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| 353 | else
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| 354 | #endif
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| 355 | fprintf (stderr, "%s:%d: ", file_name, line_number);
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| 356 | }
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| 357 |
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| 358 | #ifdef VA_START
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| 359 | VA_START (args, message);
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| 360 | error_tail (status, errnum, message, args);
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| 361 | #else
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| 362 | fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
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| 363 |
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| 364 | ++error_message_count;
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| 365 | if (errnum)
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| 366 | print_errno_message (errnum);
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| 367 | putc ('\n', stderr);
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| 368 | fflush (stderr);
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| 369 | if (status)
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| 370 | exit (status);
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| 371 | #endif
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| 372 |
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| 373 | #ifdef _LIBC
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| 374 | _IO_funlockfile (stderr);
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| 375 | #endif
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| 376 | }
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| 377 |
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| 378 | #ifdef _LIBC
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| 379 | /* Make the weak alias. */
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| 380 | # undef error
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| 381 | # undef error_at_line
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| 382 | weak_alias (__error, error)
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| 383 | weak_alias (__error_at_line, error_at_line)
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| 384 | #endif
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