Mercurial > hg > octave-nkf > gnulib-hg
annotate lib/error.c @ 4695:4cd5b2420ecf
Assume vprintf.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Fri, 12 Sep 2003 19:47:20 +0000 |
| parents | 0ec32cb1202f |
| children | 04758f7475fd |
| rev | line source |
|---|---|
| 1268 | 1 /* Error handler for noninteractive utilities |
|
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2 Copyright (C) 1990-1998, 2000, 2001, 2002, 2003 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 |
| 4636 | 23 #include "error.h" |
| 24 | |
| 25 #include <stdarg.h> | |
| 9 | 26 #include <stdio.h> |
| 4636 | 27 #include <stdlib.h> |
| 28 #include <string.h> | |
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29 |
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30 #ifdef _LIBC |
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31 # include <libintl.h> |
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32 #else |
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33 # include "gettext.h" |
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34 #endif |
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35 |
| 3446 | 36 #ifdef _LIBC |
| 37 # include <wchar.h> | |
| 38 # define mbsrtowcs __mbsrtowcs | |
| 39 #endif | |
| 9 | 40 |
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41 #if !_LIBC |
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42 # include "unlocked-io.h" |
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43 #endif |
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44 |
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45 #ifndef _ |
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46 # define _(String) String |
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47 #endif |
| 1268 | 48 |
| 398 | 49 /* If NULL, error will flush stdout, then print on stderr the program |
| 50 name, a colon and a space. Otherwise, error will call this | |
| 51 function without parameters instead. */ | |
| 4636 | 52 void (*error_print_progname) (void); |
| 572 | 53 |
| 54 /* This variable is incremented each time `error' is called. */ | |
| 55 unsigned int error_message_count; | |
| 9 | 56 |
| 527 | 57 #ifdef _LIBC |
| 572 | 58 /* In the GNU C library, there is a predefined variable for this. */ |
| 59 | |
| 1289 | 60 # define program_name program_invocation_name |
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61 # include <libio/libioP.h> |
| 572 | 62 |
| 1268 | 63 /* In GNU libc we want do not want to use the common name `error' directly. |
| 64 Instead make it a weak alias. */ | |
| 3446 | 65 extern void __error (int status, int errnum, const char *message, ...) |
| 66 __attribute__ ((__format__ (__printf__, 3, 4))); | |
| 67 extern void __error_at_line (int status, int errnum, const char *file_name, | |
| 68 unsigned int line_number, const char *message, | |
| 69 ...) | |
| 70 __attribute__ ((__format__ (__printf__, 5, 6)));; | |
| 1289 | 71 # define error __error |
| 72 # define error_at_line __error_at_line | |
| 1268 | 73 |
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74 # include <libio/iolibio.h> |
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75 # define fflush(s) INTUSE(_IO_fflush) (s) |
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76 # undef putc |
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77 # define putc(c, fp) INTUSE(_IO_putc) (c, fp) |
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78 |
| 1289 | 79 #else /* not _LIBC */ |
| 527 | 80 |
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81 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P |
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82 # ifndef HAVE_DECL_STRERROR_R |
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83 "this configure-time declaration test was not run" |
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84 # endif |
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85 char *strerror_r (); |
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86 # endif |
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87 |
| 398 | 88 /* The calling program should define program_name and set it to the |
| 89 name of the executing program. */ | |
| 90 extern char *program_name; | |
| 9 | 91 |
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92 # if HAVE_STRERROR_R || defined strerror_r |
| 1289 | 93 # define __strerror_r strerror_r |
| 4636 | 94 # endif |
| 1289 | 95 #endif /* not _LIBC */ |
| 9 | 96 |
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97 static void |
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98 print_errno_message (int errnum) |
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99 { |
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100 char const *s; |
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101 |
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102 #if defined HAVE_STRERROR_R || _LIBC |
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103 char errbuf[1024]; |
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104 # if STRERROR_R_CHAR_P || _LIBC |
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105 s = __strerror_r (errnum, errbuf, sizeof errbuf); |
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106 # else |
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107 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0) |
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108 s = errbuf; |
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109 else |
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110 s = 0; |
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111 # endif |
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112 #else |
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113 s = strerror (errnum); |
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114 #endif |
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115 |
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116 #if !_LIBC |
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117 if (! s) |
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118 s = _("Unknown system error"); |
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119 #endif |
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120 |
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121 #if _LIBC |
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122 if (_IO_fwide (stderr, 0) > 0) |
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123 { |
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124 __fwprintf (stderr, L": %s", s); |
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125 return; |
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126 } |
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127 #endif |
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128 |
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129 fprintf (stderr, ": %s", s); |
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130 } |
| 3446 | 131 |
| 132 static void | |
| 133 error_tail (int status, int errnum, const char *message, va_list args) | |
| 134 { | |
| 4695 | 135 #if _LIBC |
| 3446 | 136 if (_IO_fwide (stderr, 0) > 0) |
| 137 { | |
| 4695 | 138 # define ALLOCA_LIMIT 2000 |
| 3446 | 139 size_t len = strlen (message) + 1; |
| 140 wchar_t *wmessage = NULL; | |
| 141 mbstate_t st; | |
| 142 size_t res; | |
| 143 const char *tmp; | |
| 144 | |
| 145 do | |
| 146 { | |
| 147 if (len < ALLOCA_LIMIT) | |
| 148 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t)); | |
| 149 else | |
| 150 { | |
| 151 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT) | |
| 152 wmessage = NULL; | |
| 153 | |
| 154 wmessage = (wchar_t *) realloc (wmessage, | |
| 155 len * sizeof (wchar_t)); | |
| 156 | |
| 157 if (wmessage == NULL) | |
| 158 { | |
| 159 fputws_unlocked (L"out of memory\n", stderr); | |
| 160 return; | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 memset (&st, '\0', sizeof (st)); | |
| 165 tmp =message; | |
| 166 } | |
| 167 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len); | |
| 168 | |
| 169 if (res == (size_t) -1) | |
| 170 /* The string cannot be converted. */ | |
| 171 wmessage = (wchar_t *) L"???"; | |
| 172 | |
| 173 __vfwprintf (stderr, wmessage, args); | |
| 174 } | |
| 175 else | |
| 4695 | 176 #endif |
| 3446 | 177 vfprintf (stderr, message, args); |
| 178 va_end (args); | |
| 179 | |
| 180 ++error_message_count; | |
| 181 if (errnum) | |
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182 print_errno_message (errnum); |
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183 #if _LIBC |
| 3446 | 184 if (_IO_fwide (stderr, 0) > 0) |
| 185 putwc (L'\n', stderr); | |
| 186 else | |
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187 #endif |
| 3446 | 188 putc ('\n', stderr); |
| 189 fflush (stderr); | |
| 190 if (status) | |
| 191 exit (status); | |
| 192 } | |
| 193 | |
| 194 | |
| 9 | 195 /* Print the program name and error message MESSAGE, which is a printf-style |
| 196 format string with optional args. | |
| 197 If ERRNUM is nonzero, print its corresponding system error message. | |
| 198 Exit with status STATUS if it is nonzero. */ | |
| 199 void | |
| 398 | 200 error (int status, int errnum, const char *message, ...) |
| 9 | 201 { |
| 202 va_list args; | |
| 203 | |
| 3446 | 204 fflush (stdout); |
| 205 #ifdef _LIBC | |
| 206 _IO_flockfile (stderr); | |
| 207 #endif | |
| 398 | 208 if (error_print_progname) |
| 209 (*error_print_progname) (); | |
| 210 else | |
| 211 { | |
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212 #if _LIBC |
| 3446 | 213 if (_IO_fwide (stderr, 0) > 0) |
| 214 __fwprintf (stderr, L"%s: ", program_name); | |
| 215 else | |
| 216 #endif | |
| 217 fprintf (stderr, "%s: ", program_name); | |
| 398 | 218 } |
| 219 | |
| 4636 | 220 va_start (args, message); |
| 3446 | 221 error_tail (status, errnum, message, args); |
| 222 | |
| 223 #ifdef _LIBC | |
| 224 _IO_funlockfile (stderr); | |
| 225 #endif | |
| 9 | 226 } |
| 572 | 227 |
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228 /* Sometimes we want to have at most one error per line. This |
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229 variable controls whether this mode is selected or not. */ |
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230 int error_one_per_line; |
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231 |
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232 void |
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233 error_at_line (int status, int errnum, const char *file_name, |
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234 unsigned int line_number, const char *message, ...) |
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235 { |
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236 va_list args; |
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237 |
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238 if (error_one_per_line) |
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239 { |
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240 static const char *old_file_name; |
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241 static unsigned int old_line_number; |
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242 |
| 3446 | 243 if (old_line_number == line_number |
| 244 && (file_name == old_file_name | |
| 245 || strcmp (old_file_name, file_name) == 0)) | |
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246 /* Simply return and print nothing. */ |
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247 return; |
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248 |
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249 old_file_name = file_name; |
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250 old_line_number = line_number; |
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251 } |
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252 |
| 3446 | 253 fflush (stdout); |
| 254 #ifdef _LIBC | |
| 255 _IO_flockfile (stderr); | |
| 256 #endif | |
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257 if (error_print_progname) |
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258 (*error_print_progname) (); |
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259 else |
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260 { |
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261 #if _LIBC |
| 3446 | 262 if (_IO_fwide (stderr, 0) > 0) |
| 263 __fwprintf (stderr, L"%s: ", program_name); | |
| 264 else | |
| 265 #endif | |
| 266 fprintf (stderr, "%s:", program_name); | |
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267 } |
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268 |
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269 if (file_name != NULL) |
| 3446 | 270 { |
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271 #if _LIBC |
| 3446 | 272 if (_IO_fwide (stderr, 0) > 0) |
| 273 __fwprintf (stderr, L"%s:%d: ", file_name, line_number); | |
| 274 else | |
| 275 #endif | |
| 276 fprintf (stderr, "%s:%d: ", file_name, line_number); | |
| 277 } | |
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278 |
| 4636 | 279 va_start (args, message); |
| 3446 | 280 error_tail (status, errnum, message, args); |
| 281 | |
| 282 #ifdef _LIBC | |
| 283 _IO_funlockfile (stderr); | |
| 284 #endif | |
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285 } |
| 1268 | 286 |
| 287 #ifdef _LIBC | |
| 288 /* Make the weak alias. */ | |
| 1289 | 289 # undef error |
| 290 # undef error_at_line | |
| 1268 | 291 weak_alias (__error, error) |
| 292 weak_alias (__error_at_line, error_at_line) | |
| 293 #endif |