Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/error.c @ 4020:7158a1db8695
change license to gpl.
| author | Karl Berry <karl@freefriends.org> |
|---|---|
| date | Mon, 25 Nov 2002 00:17:33 +0000 |
| parents | 6f613df1e6f0 |
| children | 925594d77a99 |
| rev | line source |
|---|---|
| 1268 | 1 /* Error handler for noninteractive utilities |
|
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2 Copyright (C) 1990-1998, 2000, 2001, 2002 Free Software Foundation, Inc. |
| 4020 | 3 This program is free software; you can redistribute it and/or modify |
| 4 it under the terms of the GNU General Public License as published by | |
| 5 the Free Software Foundation; either version 2, or (at your option) | |
| 6 any later version. | |
| 9 | 7 |
| 4020 | 8 This program is distributed in the hope that it will be useful, |
|
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9 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 4020 | 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 GNU General Public License for more details. | |
| 572 | 12 |
| 4020 | 13 You should have received a copy of the GNU General Public License along |
| 14 with this program; if not, write to the Free Software Foundation, | |
| 15 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
| 9 | 16 |
| 398 | 17 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ |
| 18 | |
| 1268 | 19 #ifdef HAVE_CONFIG_H |
| 1289 | 20 # include <config.h> |
| 398 | 21 #endif |
| 9 | 22 |
| 23 #include <stdio.h> | |
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24 |
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25 #ifdef _LIBC |
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26 # include <libintl.h> |
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27 #else |
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28 # include "gettext.h" |
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29 #endif |
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30 #define _(msgid) gettext (msgid) |
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31 |
| 3446 | 32 #ifdef _LIBC |
| 33 # include <wchar.h> | |
| 34 # define mbsrtowcs __mbsrtowcs | |
| 35 #endif | |
| 9 | 36 |
| 527 | 37 #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC |
| 398 | 38 # if __STDC__ |
| 39 # include <stdarg.h> | |
| 40 # define VA_START(args, lastarg) va_start(args, lastarg) | |
| 41 # else | |
| 42 # include <varargs.h> | |
| 43 # define VA_START(args, lastarg) va_start(args) | |
| 44 # endif | |
| 45 #else | |
| 46 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8 | |
| 47 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; | |
| 48 #endif | |
| 9 | 49 |
| 527 | 50 #if STDC_HEADERS || _LIBC |
| 398 | 51 # include <stdlib.h> |
| 52 # include <string.h> | |
| 53 #else | |
| 54 void exit (); | |
| 55 #endif | |
| 9 | 56 |
| 1268 | 57 #include "error.h" |
| 3618 | 58 #include "unlocked-io.h" |
| 1268 | 59 |
| 398 | 60 /* If NULL, error will flush stdout, then print on stderr the program |
| 61 name, a colon and a space. Otherwise, error will call this | |
| 62 function without parameters instead. */ | |
| 572 | 63 void (*error_print_progname) ( |
| 64 #if __STDC__ - 0 | |
| 65 void | |
| 66 #endif | |
| 67 ); | |
| 68 | |
| 69 /* This variable is incremented each time `error' is called. */ | |
| 70 unsigned int error_message_count; | |
| 9 | 71 |
| 527 | 72 #ifdef _LIBC |
| 572 | 73 /* In the GNU C library, there is a predefined variable for this. */ |
| 74 | |
| 1289 | 75 # define program_name program_invocation_name |
| 76 # include <errno.h> | |
| 572 | 77 |
| 1268 | 78 /* In GNU libc we want do not want to use the common name `error' directly. |
| 79 Instead make it a weak alias. */ | |
| 3446 | 80 extern void __error (int status, int errnum, const char *message, ...) |
| 81 __attribute__ ((__format__ (__printf__, 3, 4))); | |
| 82 extern void __error_at_line (int status, int errnum, const char *file_name, | |
| 83 unsigned int line_number, const char *message, | |
| 84 ...) | |
| 85 __attribute__ ((__format__ (__printf__, 5, 6)));; | |
| 1289 | 86 # define error __error |
| 87 # define error_at_line __error_at_line | |
| 1268 | 88 |
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89 # ifdef USE_IN_LIBIO |
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90 # include <libio/iolibio.h> |
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91 # define fflush(s) _IO_fflush (s) |
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92 # endif |
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93 |
| 1289 | 94 #else /* not _LIBC */ |
| 527 | 95 |
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96 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P |
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97 # ifndef HAVE_DECL_STRERROR_R |
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98 "this configure-time declaration test was not run" |
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99 # endif |
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100 char *strerror_r (); |
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101 # endif |
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102 |
| 398 | 103 /* The calling program should define program_name and set it to the |
| 104 name of the executing program. */ | |
| 105 extern char *program_name; | |
| 9 | 106 |
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107 # if HAVE_STRERROR_R || defined strerror_r |
| 1289 | 108 # define __strerror_r strerror_r |
| 109 # else | |
| 110 # if HAVE_STRERROR | |
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111 # ifndef HAVE_DECL_STRERROR |
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112 "this configure-time declaration test was not run" |
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113 # endif |
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114 # if !HAVE_DECL_STRERROR |
| 398 | 115 char *strerror (); |
| 1289 | 116 # endif |
| 117 # else | |
| 9 | 118 static char * |
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119 private_strerror (int errnum) |
| 9 | 120 { |
| 121 extern char *sys_errlist[]; | |
| 122 extern int sys_nerr; | |
| 123 | |
| 124 if (errnum > 0 && errnum <= sys_nerr) | |
| 1268 | 125 return _(sys_errlist[errnum]); |
| 572 | 126 return _("Unknown system error"); |
| 9 | 127 } |
| 1289 | 128 # define strerror private_strerror |
| 129 # endif /* HAVE_STRERROR */ | |
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130 # endif /* HAVE_STRERROR_R || defined strerror_r */ |
| 1289 | 131 #endif /* not _LIBC */ |
| 9 | 132 |
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133 static void |
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134 print_errno_message (int errnum) |
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135 { |
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136 char const *s; |
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137 |
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138 #if defined HAVE_STRERROR_R || _LIBC |
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139 char errbuf[1024]; |
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140 # if STRERROR_R_CHAR_P || _LIBC |
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141 s = __strerror_r (errnum, errbuf, sizeof errbuf); |
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142 # else |
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143 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0) |
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144 s = errbuf; |
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145 else |
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146 s = 0; |
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147 # endif |
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148 #else |
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149 s = strerror (errnum); |
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150 #endif |
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151 |
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152 #if !_LIBC |
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153 if (! s) |
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154 s = _("Unknown system error"); |
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155 #endif |
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156 |
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157 #if _LIBC && USE_IN_LIBIO |
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158 if (_IO_fwide (stderr, 0) > 0) |
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159 { |
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160 __fwprintf (stderr, L": %s", s); |
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161 return; |
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162 } |
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163 #endif |
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164 |
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165 fprintf (stderr, ": %s", s); |
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166 } |
| 3446 | 167 |
| 168 #ifdef VA_START | |
| 169 static void | |
| 170 error_tail (int status, int errnum, const char *message, va_list args) | |
| 171 { | |
| 172 # if HAVE_VPRINTF || _LIBC | |
| 173 # if _LIBC && USE_IN_LIBIO | |
| 174 if (_IO_fwide (stderr, 0) > 0) | |
| 175 { | |
| 176 # define ALLOCA_LIMIT 2000 | |
| 177 size_t len = strlen (message) + 1; | |
| 178 wchar_t *wmessage = NULL; | |
| 179 mbstate_t st; | |
| 180 size_t res; | |
| 181 const char *tmp; | |
| 182 | |
| 183 do | |
| 184 { | |
| 185 if (len < ALLOCA_LIMIT) | |
| 186 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t)); | |
| 187 else | |
| 188 { | |
| 189 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT) | |
| 190 wmessage = NULL; | |
| 191 | |
| 192 wmessage = (wchar_t *) realloc (wmessage, | |
| 193 len * sizeof (wchar_t)); | |
| 194 | |
| 195 if (wmessage == NULL) | |
| 196 { | |
| 197 fputws_unlocked (L"out of memory\n", stderr); | |
| 198 return; | |
| 199 } | |
| 200 } | |
| 201 | |
| 202 memset (&st, '\0', sizeof (st)); | |
| 203 tmp =message; | |
| 204 } | |
| 205 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len); | |
| 206 | |
| 207 if (res == (size_t) -1) | |
| 208 /* The string cannot be converted. */ | |
| 209 wmessage = (wchar_t *) L"???"; | |
| 210 | |
| 211 __vfwprintf (stderr, wmessage, args); | |
| 212 } | |
| 213 else | |
| 214 # endif | |
| 215 vfprintf (stderr, message, args); | |
| 216 # else | |
| 217 _doprnt (message, args, stderr); | |
| 218 # endif | |
| 219 va_end (args); | |
| 220 | |
| 221 ++error_message_count; | |
| 222 if (errnum) | |
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223 print_errno_message (errnum); |
| 3446 | 224 # if _LIBC && USE_IN_LIBIO |
| 225 if (_IO_fwide (stderr, 0) > 0) | |
| 226 putwc (L'\n', stderr); | |
| 227 else | |
| 228 # endif | |
| 229 putc ('\n', stderr); | |
| 230 fflush (stderr); | |
| 231 if (status) | |
| 232 exit (status); | |
| 233 } | |
| 234 #endif | |
| 235 | |
| 236 | |
| 9 | 237 /* Print the program name and error message MESSAGE, which is a printf-style |
| 238 format string with optional args. | |
| 239 If ERRNUM is nonzero, print its corresponding system error message. | |
| 240 Exit with status STATUS if it is nonzero. */ | |
| 241 /* VARARGS */ | |
| 242 void | |
| 1289 | 243 #if defined VA_START && __STDC__ |
| 398 | 244 error (int status, int errnum, const char *message, ...) |
| 245 #else | |
| 9 | 246 error (status, errnum, message, va_alist) |
| 247 int status; | |
| 248 int errnum; | |
| 249 char *message; | |
| 250 va_dcl | |
| 398 | 251 #endif |
| 9 | 252 { |
| 398 | 253 #ifdef VA_START |
| 9 | 254 va_list args; |
| 398 | 255 #endif |
| 9 | 256 |
| 3446 | 257 fflush (stdout); |
| 258 #ifdef _LIBC | |
| 259 # ifdef USE_IN_LIBIO | |
| 260 _IO_flockfile (stderr); | |
| 261 # else | |
| 262 __flockfile (stderr); | |
| 263 # endif | |
| 264 #endif | |
| 398 | 265 if (error_print_progname) |
| 266 (*error_print_progname) (); | |
| 267 else | |
| 268 { | |
| 3446 | 269 #if _LIBC && USE_IN_LIBIO |
| 270 if (_IO_fwide (stderr, 0) > 0) | |
| 271 __fwprintf (stderr, L"%s: ", program_name); | |
| 272 else | |
| 273 #endif | |
| 274 fprintf (stderr, "%s: ", program_name); | |
| 398 | 275 } |
| 276 | |
| 277 #ifdef VA_START | |
| 9 | 278 VA_START (args, message); |
| 3446 | 279 error_tail (status, errnum, message, args); |
| 398 | 280 #else |
| 9 | 281 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
| 398 | 282 |
| 440 | 283 ++error_message_count; |
| 9 | 284 if (errnum) |
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285 print_errno_message (errnum); |
| 9 | 286 putc ('\n', stderr); |
| 287 fflush (stderr); | |
| 288 if (status) | |
| 289 exit (status); | |
| 3446 | 290 #endif |
| 291 | |
| 292 #ifdef _LIBC | |
| 293 # ifdef USE_IN_LIBIO | |
| 294 _IO_funlockfile (stderr); | |
| 295 # else | |
| 296 __funlockfile (stderr); | |
| 297 # endif | |
| 298 #endif | |
| 9 | 299 } |
| 572 | 300 |
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301 /* Sometimes we want to have at most one error per line. This |
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302 variable controls whether this mode is selected or not. */ |
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303 int error_one_per_line; |
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304 |
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305 void |
| 1289 | 306 #if defined VA_START && __STDC__ |
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307 error_at_line (int status, int errnum, const char *file_name, |
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308 unsigned int line_number, const char *message, ...) |
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309 #else |
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310 error_at_line (status, errnum, file_name, line_number, message, va_alist) |
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311 int status; |
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312 int errnum; |
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313 const char *file_name; |
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314 unsigned int line_number; |
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315 char *message; |
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316 va_dcl |
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317 #endif |
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318 { |
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319 #ifdef VA_START |
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320 va_list args; |
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321 #endif |
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322 |
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323 if (error_one_per_line) |
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324 { |
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325 static const char *old_file_name; |
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326 static unsigned int old_line_number; |
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327 |
| 3446 | 328 if (old_line_number == line_number |
| 329 && (file_name == old_file_name | |
| 330 || strcmp (old_file_name, file_name) == 0)) | |
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331 /* Simply return and print nothing. */ |
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332 return; |
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333 |
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334 old_file_name = file_name; |
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335 old_line_number = line_number; |
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336 } |
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337 |
| 3446 | 338 fflush (stdout); |
| 339 #ifdef _LIBC | |
| 340 # ifdef USE_IN_LIBIO | |
| 341 _IO_flockfile (stderr); | |
| 342 # else | |
| 343 __flockfile (stderr); | |
| 344 # endif | |
| 345 #endif | |
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346 if (error_print_progname) |
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347 (*error_print_progname) (); |
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348 else |
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349 { |
| 3446 | 350 #if _LIBC && USE_IN_LIBIO |
| 351 if (_IO_fwide (stderr, 0) > 0) | |
| 352 __fwprintf (stderr, L"%s: ", program_name); | |
| 353 else | |
| 354 #endif | |
| 355 fprintf (stderr, "%s:", program_name); | |
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356 } |
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357 |
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358 if (file_name != NULL) |
| 3446 | 359 { |
| 360 #if _LIBC && USE_IN_LIBIO | |
| 361 if (_IO_fwide (stderr, 0) > 0) | |
| 362 __fwprintf (stderr, L"%s:%d: ", file_name, line_number); | |
| 363 else | |
| 364 #endif | |
| 365 fprintf (stderr, "%s:%d: ", file_name, line_number); | |
| 366 } | |
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367 |
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368 #ifdef VA_START |
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369 VA_START (args, message); |
| 3446 | 370 error_tail (status, errnum, message, args); |
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371 #else |
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372 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
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373 |
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374 ++error_message_count; |
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375 if (errnum) |
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376 print_errno_message (errnum); |
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377 putc ('\n', stderr); |
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378 fflush (stderr); |
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379 if (status) |
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380 exit (status); |
| 3446 | 381 #endif |
| 382 | |
| 383 #ifdef _LIBC | |
| 384 # ifdef USE_IN_LIBIO | |
| 385 _IO_funlockfile (stderr); | |
| 386 # else | |
| 387 __funlockfile (stderr); | |
| 388 # endif | |
| 389 #endif | |
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390 } |
| 1268 | 391 |
| 392 #ifdef _LIBC | |
| 393 /* Make the weak alias. */ | |
| 1289 | 394 # undef error |
| 395 # undef error_at_line | |
| 1268 | 396 weak_alias (__error, error) |
| 397 weak_alias (__error_at_line, error_at_line) | |
| 398 #endif |