Mercurial > hg > octave-jordi > gnulib-hg
annotate lib/error.c @ 2099:910892507841
(error): Use __strerror_r's return value only if HAVE_WORKING_STRERROR_R.
(error_at_line): Likewise.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Sat, 08 Jan 2000 16:44:19 +0000 |
| parents | ff7525910d7b |
| children | 4c34c8e77805 |
| rev | line source |
|---|---|
| 1268 | 1 /* Error handler for noninteractive utilities |
|
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2 Copyright (C) 1990-2000 Free Software Foundation, Inc. |
| 1268 | 3 |
| 1289 | 4 This file is part of the GNU C Library. Its master source is NOT part of |
| 5 the C library, however. The master source lives in /gd/gnu/lib. | |
| 1268 | 6 |
| 1289 | 7 The GNU C Library is free software; you can redistribute it and/or |
| 8 modify it under the terms of the GNU Library General Public License as | |
| 9 published by the Free Software Foundation; either version 2 of the | |
| 10 License, or (at your option) any later version. | |
| 9 | 11 |
| 1289 | 12 The GNU C Library is distributed in the hope that it will be useful, |
|
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 1289 | 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 Library General Public License for more details. | |
| 572 | 16 |
| 1289 | 17 You should have received a copy of the GNU Library General Public |
| 18 License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 9 | 21 |
| 398 | 22 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */ |
| 23 | |
| 1268 | 24 #ifdef HAVE_CONFIG_H |
| 1289 | 25 # include <config.h> |
| 398 | 26 #endif |
| 9 | 27 |
| 28 #include <stdio.h> | |
| 29 | |
| 527 | 30 #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC |
| 398 | 31 # if __STDC__ |
| 32 # include <stdarg.h> | |
| 33 # define VA_START(args, lastarg) va_start(args, lastarg) | |
| 34 # else | |
| 35 # include <varargs.h> | |
| 36 # define VA_START(args, lastarg) va_start(args) | |
| 37 # endif | |
| 38 #else | |
| 39 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8 | |
| 40 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8; | |
| 41 #endif | |
| 9 | 42 |
| 527 | 43 #if STDC_HEADERS || _LIBC |
| 398 | 44 # include <stdlib.h> |
| 45 # include <string.h> | |
| 46 #else | |
| 47 void exit (); | |
| 48 #endif | |
| 9 | 49 |
| 1268 | 50 #include "error.h" |
| 51 | |
| 572 | 52 #ifndef _ |
| 1289 | 53 # define _(String) String |
| 572 | 54 #endif |
| 440 | 55 |
| 398 | 56 /* If NULL, error will flush stdout, then print on stderr the program |
| 57 name, a colon and a space. Otherwise, error will call this | |
| 58 function without parameters instead. */ | |
| 572 | 59 void (*error_print_progname) ( |
| 60 #if __STDC__ - 0 | |
| 61 void | |
| 62 #endif | |
| 63 ); | |
| 64 | |
| 65 /* This variable is incremented each time `error' is called. */ | |
| 66 unsigned int error_message_count; | |
| 9 | 67 |
| 527 | 68 #ifdef _LIBC |
| 572 | 69 /* In the GNU C library, there is a predefined variable for this. */ |
| 70 | |
| 1289 | 71 # define program_name program_invocation_name |
| 72 # include <errno.h> | |
| 572 | 73 |
| 1268 | 74 /* In GNU libc we want do not want to use the common name `error' directly. |
| 75 Instead make it a weak alias. */ | |
| 1289 | 76 # define error __error |
| 77 # define error_at_line __error_at_line | |
| 1268 | 78 |
| 1289 | 79 #else /* not _LIBC */ |
| 527 | 80 |
| 398 | 81 /* The calling program should define program_name and set it to the |
| 82 name of the executing program. */ | |
| 83 extern char *program_name; | |
| 9 | 84 |
| 1289 | 85 # ifdef HAVE_STRERROR_R |
| 86 # define __strerror_r strerror_r | |
| 87 # else | |
| 88 # if HAVE_STRERROR | |
| 89 # ifndef strerror /* On some systems, strerror is a macro */ | |
| 398 | 90 char *strerror (); |
| 1289 | 91 # endif |
| 92 # else | |
| 9 | 93 static char * |
| 94 private_strerror (errnum) | |
| 95 int errnum; | |
| 96 { | |
| 97 extern char *sys_errlist[]; | |
| 98 extern int sys_nerr; | |
| 99 | |
| 100 if (errnum > 0 && errnum <= sys_nerr) | |
| 1268 | 101 return _(sys_errlist[errnum]); |
| 572 | 102 return _("Unknown system error"); |
| 9 | 103 } |
| 1289 | 104 # define strerror private_strerror |
| 105 # endif /* HAVE_STRERROR */ | |
| 106 # endif /* HAVE_STRERROR_R */ | |
| 107 #endif /* not _LIBC */ | |
| 9 | 108 |
| 109 /* Print the program name and error message MESSAGE, which is a printf-style | |
| 110 format string with optional args. | |
| 111 If ERRNUM is nonzero, print its corresponding system error message. | |
| 112 Exit with status STATUS if it is nonzero. */ | |
| 113 /* VARARGS */ | |
| 398 | 114 |
| 9 | 115 void |
| 1289 | 116 #if defined VA_START && __STDC__ |
| 398 | 117 error (int status, int errnum, const char *message, ...) |
| 118 #else | |
| 9 | 119 error (status, errnum, message, va_alist) |
| 120 int status; | |
| 121 int errnum; | |
| 122 char *message; | |
| 123 va_dcl | |
| 398 | 124 #endif |
| 9 | 125 { |
| 398 | 126 #ifdef VA_START |
| 9 | 127 va_list args; |
| 398 | 128 #endif |
| 9 | 129 |
| 398 | 130 if (error_print_progname) |
| 131 (*error_print_progname) (); | |
| 132 else | |
| 133 { | |
| 134 fflush (stdout); | |
| 135 fprintf (stderr, "%s: ", program_name); | |
| 136 } | |
| 137 | |
| 138 #ifdef VA_START | |
| 9 | 139 VA_START (args, message); |
| 527 | 140 # if HAVE_VPRINTF || _LIBC |
| 9 | 141 vfprintf (stderr, message, args); |
| 398 | 142 # else |
| 143 _doprnt (message, args, stderr); | |
| 144 # endif | |
| 9 | 145 va_end (args); |
| 398 | 146 #else |
| 9 | 147 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
| 398 | 148 #endif |
| 149 | |
| 440 | 150 ++error_message_count; |
| 9 | 151 if (errnum) |
| 1268 | 152 { |
|
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(error): Use __strerror_r's return value only if HAVE_WORKING_STRERROR_R.
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153 #if defined HAVE_STRERROR_R || _LIBC |
| 1268 | 154 char errbuf[1024]; |
|
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155 # if HAVE_WORKING_STRERROR_R || _LIBC |
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156 fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf)); |
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157 # else |
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158 /* Don't use __strerror_r's return value because on some systems |
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159 (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */ |
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160 __strerror_r (errnum, errbuf, sizeof errbuf); |
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161 fprintf (stderr, ": %s", errbuf); |
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162 # endif |
| 1268 | 163 #else |
| 164 fprintf (stderr, ": %s", strerror (errnum)); | |
| 165 #endif | |
| 166 } | |
| 9 | 167 putc ('\n', stderr); |
| 168 fflush (stderr); | |
| 169 if (status) | |
| 170 exit (status); | |
| 171 } | |
| 572 | 172 |
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173 /* Sometimes we want to have at most one error per line. This |
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174 variable controls whether this mode is selected or not. */ |
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175 int error_one_per_line; |
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176 |
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177 void |
| 1289 | 178 #if defined VA_START && __STDC__ |
|
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179 error_at_line (int status, int errnum, const char *file_name, |
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180 unsigned int line_number, const char *message, ...) |
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181 #else |
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182 error_at_line (status, errnum, file_name, line_number, message, va_alist) |
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183 int status; |
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184 int errnum; |
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185 const char *file_name; |
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186 unsigned int line_number; |
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187 char *message; |
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188 va_dcl |
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189 #endif |
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190 { |
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191 #ifdef VA_START |
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192 va_list args; |
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193 #endif |
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194 |
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195 if (error_one_per_line) |
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196 { |
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197 static const char *old_file_name; |
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198 static unsigned int old_line_number; |
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199 |
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200 if (old_line_number == line_number && |
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201 (file_name == old_file_name || !strcmp (old_file_name, file_name))) |
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202 /* Simply return and print nothing. */ |
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203 return; |
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204 |
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205 old_file_name = file_name; |
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206 old_line_number = line_number; |
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207 } |
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208 |
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209 if (error_print_progname) |
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210 (*error_print_progname) (); |
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211 else |
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212 { |
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213 fflush (stdout); |
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214 fprintf (stderr, "%s:", program_name); |
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215 } |
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216 |
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217 if (file_name != NULL) |
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218 fprintf (stderr, "%s:%d: ", file_name, line_number); |
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219 |
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220 #ifdef VA_START |
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221 VA_START (args, message); |
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222 # if HAVE_VPRINTF || _LIBC |
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223 vfprintf (stderr, message, args); |
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224 # else |
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225 _doprnt (message, args, stderr); |
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226 # endif |
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227 va_end (args); |
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228 #else |
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229 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8); |
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230 #endif |
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231 |
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232 ++error_message_count; |
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233 if (errnum) |
| 1268 | 234 { |
| 235 #if defined HAVE_STRERROR_R || defined _LIBC | |
| 236 char errbuf[1024]; | |
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237 # if HAVE_WORKING_STRERROR_R || _LIBC |
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238 fprintf (stderr, ": %s", __strerror_r (errnum, errbuf, sizeof errbuf)); |
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239 # else |
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240 /* Don't use __strerror_r's return value because on some systems |
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241 (at least DEC UNIX 4.0[A-D]) strerror_r returns `int'. */ |
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242 __strerror_r (errnum, errbuf, sizeof errbuf); |
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243 fprintf (stderr, ": %s", errbuf); |
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244 # endif |
| 1268 | 245 #else |
| 246 fprintf (stderr, ": %s", strerror (errnum)); | |
| 247 #endif | |
| 248 } | |
|
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249 putc ('\n', stderr); |
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250 fflush (stderr); |
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251 if (status) |
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252 exit (status); |
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253 } |
| 1268 | 254 |
| 255 #ifdef _LIBC | |
| 256 /* Make the weak alias. */ | |
| 1289 | 257 # undef error |
| 258 # undef error_at_line | |
| 1268 | 259 weak_alias (__error, error) |
| 260 weak_alias (__error_at_line, error_at_line) | |
| 261 #endif |