1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-1998, 2000, 2001, 2002 Free Software Foundation, Inc.
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)
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
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. */
17 /* 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 # include "unlocked-io.h"
63 # define _(String) String
66 /* If NULL, error will flush stdout, then print on stderr the program
67 name, a colon and a space. Otherwise, error will call this
68 function without parameters instead. */
69 void (*error_print_progname) (
75 /* This variable is incremented each time `error' is called. */
76 unsigned int error_message_count;
79 /* In the GNU C library, there is a predefined variable for this. */
81 # define program_name program_invocation_name
83 # include <libio/libioP.h>
85 /* In GNU libc we want do not want to use the common name `error' directly.
86 Instead make it a weak alias. */
87 extern void __error (int status, int errnum, const char *message, ...)
88 __attribute__ ((__format__ (__printf__, 3, 4)));
89 extern void __error_at_line (int status, int errnum, const char *file_name,
90 unsigned int line_number, const char *message,
92 __attribute__ ((__format__ (__printf__, 5, 6)));;
93 # define error __error
94 # define error_at_line __error_at_line
97 # include <libio/iolibio.h>
98 # define fflush(s) INTUSE(_IO_fflush) (s)
100 # define putc(c, fp) INTUSE(_IO_putc) (c, fp)
103 #else /* not _LIBC */
105 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
106 # ifndef HAVE_DECL_STRERROR_R
107 "this configure-time declaration test was not run"
112 /* The calling program should define program_name and set it to the
113 name of the executing program. */
114 extern char *program_name;
116 # if HAVE_STRERROR_R || defined strerror_r
117 # define __strerror_r strerror_r
120 # ifndef HAVE_DECL_STRERROR
121 "this configure-time declaration test was not run"
123 # if !HAVE_DECL_STRERROR
128 private_strerror (int errnum)
130 extern char *sys_errlist[];
133 if (errnum > 0 && errnum <= sys_nerr)
134 return _(sys_errlist[errnum]);
135 return _("Unknown system error");
137 # define strerror private_strerror
138 # endif /* HAVE_STRERROR */
139 # endif /* HAVE_STRERROR_R || defined strerror_r */
140 #endif /* not _LIBC */
143 print_errno_message (int errnum)
147 #if defined HAVE_STRERROR_R || _LIBC
149 # if STRERROR_R_CHAR_P || _LIBC
150 s = __strerror_r (errnum, errbuf, sizeof errbuf);
152 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
158 s = strerror (errnum);
163 s = _("Unknown system error");
166 #if _LIBC && USE_IN_LIBIO
167 if (_IO_fwide (stderr, 0) > 0)
169 __fwprintf (stderr, L": %s", s);
174 fprintf (stderr, ": %s", s);
179 error_tail (int status, int errnum, const char *message, va_list args)
181 # if HAVE_VPRINTF || _LIBC
182 # if _LIBC && USE_IN_LIBIO
183 if (_IO_fwide (stderr, 0) > 0)
185 # define ALLOCA_LIMIT 2000
186 size_t len = strlen (message) + 1;
187 wchar_t *wmessage = NULL;
194 if (len < ALLOCA_LIMIT)
195 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
198 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
201 wmessage = (wchar_t *) realloc (wmessage,
202 len * sizeof (wchar_t));
204 if (wmessage == NULL)
206 fputws_unlocked (L"out of memory\n", stderr);
211 memset (&st, '\0', sizeof (st));
214 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
216 if (res == (size_t) -1)
217 /* The string cannot be converted. */
218 wmessage = (wchar_t *) L"???";
220 __vfwprintf (stderr, wmessage, args);
224 vfprintf (stderr, message, args);
226 _doprnt (message, args, stderr);
230 ++error_message_count;
232 print_errno_message (errnum);
233 # if _LIBC && USE_IN_LIBIO
234 if (_IO_fwide (stderr, 0) > 0)
235 putwc (L'\n', stderr);
246 /* Print the program name and error message MESSAGE, which is a printf-style
247 format string with optional args.
248 If ERRNUM is nonzero, print its corresponding system error message.
249 Exit with status STATUS if it is nonzero. */
252 #if defined VA_START && __STDC__
253 error (int status, int errnum, const char *message, ...)
255 error (status, errnum, message, va_alist)
269 _IO_flockfile (stderr);
271 __flockfile (stderr);
274 if (error_print_progname)
275 (*error_print_progname) ();
278 #if _LIBC && USE_IN_LIBIO
279 if (_IO_fwide (stderr, 0) > 0)
280 __fwprintf (stderr, L"%s: ", program_name);
283 fprintf (stderr, "%s: ", program_name);
287 VA_START (args, message);
288 error_tail (status, errnum, message, args);
290 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
292 ++error_message_count;
294 print_errno_message (errnum);
303 _IO_funlockfile (stderr);
305 __funlockfile (stderr);
310 /* Sometimes we want to have at most one error per line. This
311 variable controls whether this mode is selected or not. */
312 int error_one_per_line;
315 #if defined VA_START && __STDC__
316 error_at_line (int status, int errnum, const char *file_name,
317 unsigned int line_number, const char *message, ...)
319 error_at_line (status, errnum, file_name, line_number, message, va_alist)
322 const char *file_name;
323 unsigned int line_number;
332 if (error_one_per_line)
334 static const char *old_file_name;
335 static unsigned int old_line_number;
337 if (old_line_number == line_number
338 && (file_name == old_file_name
339 || strcmp (old_file_name, file_name) == 0))
340 /* Simply return and print nothing. */
343 old_file_name = file_name;
344 old_line_number = line_number;
350 _IO_flockfile (stderr);
352 __flockfile (stderr);
355 if (error_print_progname)
356 (*error_print_progname) ();
359 #if _LIBC && USE_IN_LIBIO
360 if (_IO_fwide (stderr, 0) > 0)
361 __fwprintf (stderr, L"%s: ", program_name);
364 fprintf (stderr, "%s:", program_name);
367 if (file_name != NULL)
369 #if _LIBC && USE_IN_LIBIO
370 if (_IO_fwide (stderr, 0) > 0)
371 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
374 fprintf (stderr, "%s:%d: ", file_name, line_number);
378 VA_START (args, message);
379 error_tail (status, errnum, message, args);
381 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
383 ++error_message_count;
385 print_errno_message (errnum);
394 _IO_funlockfile (stderr);
396 __funlockfile (stderr);
402 /* Make the weak alias. */
404 # undef error_at_line
405 weak_alias (__error, error)
406 weak_alias (__error_at_line, error_at_line)