1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-1998, 2000, 2001 Free Software Foundation, Inc.
3 This file is part of the GNU C Library. Its master source is NOT part of
4 the C library, however. The master source lives in /gd/gnu/lib.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
33 # define mbsrtowcs __mbsrtowcs
36 #if HAVE_VPRINTF || HAVE_DOPRNT || _LIBC
39 # define VA_START(args, lastarg) va_start(args, lastarg)
42 # define VA_START(args, lastarg) va_start(args)
45 # define va_alist a1, a2, a3, a4, a5, a6, a7, a8
46 # define va_dcl char *a1, *a2, *a3, *a4, *a5, *a6, *a7, *a8;
49 #if STDC_HEADERS || _LIBC
59 # define _(String) String
62 /* If NULL, error will flush stdout, then print on stderr the program
63 name, a colon and a space. Otherwise, error will call this
64 function without parameters instead. */
65 void (*error_print_progname) (
71 /* This variable is incremented each time `error' is called. */
72 unsigned int error_message_count;
75 /* In the GNU C library, there is a predefined variable for this. */
77 # define program_name program_invocation_name
80 /* In GNU libc we want do not want to use the common name `error' directly.
81 Instead make it a weak alias. */
82 extern void __error (int status, int errnum, const char *message, ...)
83 __attribute__ ((__format__ (__printf__, 3, 4)));
84 extern void __error_at_line (int status, int errnum, const char *file_name,
85 unsigned int line_number, const char *message,
87 __attribute__ ((__format__ (__printf__, 5, 6)));;
88 # define error __error
89 # define error_at_line __error_at_line
92 # include <libio/iolibio.h>
93 # define fflush(s) _IO_fflush (s)
98 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
99 # ifndef HAVE_DECL_STRERROR_R
100 "this configure-time declaration test was not run"
105 /* The calling program should define program_name and set it to the
106 name of the executing program. */
107 extern char *program_name;
109 # if HAVE_STRERROR_R || defined strerror_r
110 # define __strerror_r strerror_r
113 # ifndef HAVE_DECL_STRERROR
114 "this configure-time declaration test was not run"
116 # if !HAVE_DECL_STRERROR
121 private_strerror (int errnum)
123 extern char *sys_errlist[];
126 if (errnum > 0 && errnum <= sys_nerr)
127 return _(sys_errlist[errnum]);
128 return _("Unknown system error");
130 # define strerror private_strerror
131 # endif /* HAVE_STRERROR */
132 # endif /* HAVE_STRERROR_R || defined strerror_r */
133 #endif /* not _LIBC */
136 print_errno_message (int errnum)
140 #if defined HAVE_STRERROR_R || _LIBC
142 # if STRERROR_R_CHAR_P || _LIBC
143 s = __strerror_r (errnum, errbuf, sizeof errbuf);
145 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
151 s = strerror (errnum);
156 s = _("Unknown system error");
159 #if _LIBC && USE_IN_LIBIO
160 if (_IO_fwide (stderr, 0) > 0)
162 __fwprintf (stderr, L": %s", s);
167 fprintf (stderr, ": %s", s);
172 error_tail (int status, int errnum, const char *message, va_list args)
174 # if HAVE_VPRINTF || _LIBC
175 # if _LIBC && USE_IN_LIBIO
176 if (_IO_fwide (stderr, 0) > 0)
178 # define ALLOCA_LIMIT 2000
179 size_t len = strlen (message) + 1;
180 wchar_t *wmessage = NULL;
187 if (len < ALLOCA_LIMIT)
188 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
191 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
194 wmessage = (wchar_t *) realloc (wmessage,
195 len * sizeof (wchar_t));
197 if (wmessage == NULL)
199 fputws_unlocked (L"out of memory\n", stderr);
204 memset (&st, '\0', sizeof (st));
207 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
209 if (res == (size_t) -1)
210 /* The string cannot be converted. */
211 wmessage = (wchar_t *) L"???";
213 __vfwprintf (stderr, wmessage, args);
217 vfprintf (stderr, message, args);
219 _doprnt (message, args, stderr);
223 ++error_message_count;
225 print_errno_message (errnum);
226 # if _LIBC && USE_IN_LIBIO
227 if (_IO_fwide (stderr, 0) > 0)
228 putwc (L'\n', stderr);
239 /* Print the program name and error message MESSAGE, which is a printf-style
240 format string with optional args.
241 If ERRNUM is nonzero, print its corresponding system error message.
242 Exit with status STATUS if it is nonzero. */
245 #if defined VA_START && __STDC__
246 error (int status, int errnum, const char *message, ...)
248 error (status, errnum, message, va_alist)
262 _IO_flockfile (stderr);
264 __flockfile (stderr);
267 if (error_print_progname)
268 (*error_print_progname) ();
271 #if _LIBC && USE_IN_LIBIO
272 if (_IO_fwide (stderr, 0) > 0)
273 __fwprintf (stderr, L"%s: ", program_name);
276 fprintf (stderr, "%s: ", program_name);
280 VA_START (args, message);
281 error_tail (status, errnum, message, args);
283 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
285 ++error_message_count;
287 print_errno_message (errnum);
296 _IO_funlockfile (stderr);
298 __funlockfile (stderr);
303 /* Sometimes we want to have at most one error per line. This
304 variable controls whether this mode is selected or not. */
305 int error_one_per_line;
308 #if defined VA_START && __STDC__
309 error_at_line (int status, int errnum, const char *file_name,
310 unsigned int line_number, const char *message, ...)
312 error_at_line (status, errnum, file_name, line_number, message, va_alist)
315 const char *file_name;
316 unsigned int line_number;
325 if (error_one_per_line)
327 static const char *old_file_name;
328 static unsigned int old_line_number;
330 if (old_line_number == line_number
331 && (file_name == old_file_name
332 || strcmp (old_file_name, file_name) == 0))
333 /* Simply return and print nothing. */
336 old_file_name = file_name;
337 old_line_number = line_number;
343 _IO_flockfile (stderr);
345 __flockfile (stderr);
348 if (error_print_progname)
349 (*error_print_progname) ();
352 #if _LIBC && USE_IN_LIBIO
353 if (_IO_fwide (stderr, 0) > 0)
354 __fwprintf (stderr, L"%s: ", program_name);
357 fprintf (stderr, "%s:", program_name);
360 if (file_name != NULL)
362 #if _LIBC && USE_IN_LIBIO
363 if (_IO_fwide (stderr, 0) > 0)
364 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
367 fprintf (stderr, "%s:%d: ", file_name, line_number);
371 VA_START (args, message);
372 error_tail (status, errnum, message, args);
374 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
376 ++error_message_count;
378 print_errno_message (errnum);
387 _IO_funlockfile (stderr);
389 __funlockfile (stderr);
395 /* Make the weak alias. */
397 # undef error_at_line
398 weak_alias (__error, error)
399 weak_alias (__error_at_line, error_at_line)