1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-1998, 2000-2002, 2003 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation,
17 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
40 # define mbsrtowcs __mbsrtowcs
44 # include "unlocked-io.h"
48 # define _(String) String
51 /* If NULL, error will flush stdout, then print on stderr the program
52 name, a colon and a space. Otherwise, error will call this
53 function without parameters instead. */
54 void (*error_print_progname) (void);
56 /* This variable is incremented each time `error' is called. */
57 unsigned int error_message_count;
60 /* In the GNU C library, there is a predefined variable for this. */
62 # define program_name program_invocation_name
64 # include <libio/libioP.h>
66 /* In GNU libc we want do not want to use the common name `error' directly.
67 Instead make it a weak alias. */
68 extern void __error (int status, int errnum, const char *message, ...)
69 __attribute__ ((__format__ (__printf__, 3, 4)));
70 extern void __error_at_line (int status, int errnum, const char *file_name,
71 unsigned int line_number, const char *message,
73 __attribute__ ((__format__ (__printf__, 5, 6)));;
74 # define error __error
75 # define error_at_line __error_at_line
77 # include <libio/iolibio.h>
78 # define fflush(s) INTUSE(_IO_fflush) (s)
80 # define putc(c, fp) INTUSE(_IO_putc) (c, fp)
82 # include <bits/libc-lock.h>
86 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
87 # ifndef HAVE_DECL_STRERROR_R
88 "this configure-time declaration test was not run"
93 /* The calling program should define program_name and set it to the
94 name of the executing program. */
95 extern char *program_name;
97 # if HAVE_STRERROR_R || defined strerror_r
98 # define __strerror_r strerror_r
100 #endif /* not _LIBC */
103 print_errno_message (int errnum)
107 #if defined HAVE_STRERROR_R || _LIBC
109 # if STRERROR_R_CHAR_P || _LIBC
110 s = __strerror_r (errnum, errbuf, sizeof errbuf);
112 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
118 s = strerror (errnum);
123 s = _("Unknown system error");
127 if (_IO_fwide (stderr, 0) > 0)
129 __fwprintf (stderr, L": %s", s);
134 fprintf (stderr, ": %s", s);
138 error_tail (int status, int errnum, const char *message, va_list args)
141 if (_IO_fwide (stderr, 0) > 0)
143 # define ALLOCA_LIMIT 2000
144 size_t len = strlen (message) + 1;
145 wchar_t *wmessage = NULL;
152 if (len < ALLOCA_LIMIT)
153 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
156 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
159 wmessage = (wchar_t *) realloc (wmessage,
160 len * sizeof (wchar_t));
162 if (wmessage == NULL)
164 fputws_unlocked (L"out of memory\n", stderr);
169 memset (&st, '\0', sizeof (st));
172 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
174 if (res == (size_t) -1)
175 /* The string cannot be converted. */
176 wmessage = (wchar_t *) L"???";
178 __vfwprintf (stderr, wmessage, args);
182 vfprintf (stderr, message, args);
185 ++error_message_count;
187 print_errno_message (errnum);
189 if (_IO_fwide (stderr, 0) > 0)
190 putwc (L'\n', stderr);
200 /* Print the program name and error message MESSAGE, which is a printf-style
201 format string with optional args.
202 If ERRNUM is nonzero, print its corresponding system error message.
203 Exit with status STATUS if it is nonzero. */
205 error (int status, int errnum, const char *message, ...)
209 #if defined _LIBC && defined __libc_ptf_call
210 /* We do not want this call to be cut short by a thread
211 cancellation. Therefore disable cancellation for now. */
212 int state = PTHREAD_CANCEL_ENABLE;
213 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
219 _IO_flockfile (stderr);
221 if (error_print_progname)
222 (*error_print_progname) ();
226 if (_IO_fwide (stderr, 0) > 0)
227 __fwprintf (stderr, L"%s: ", program_name);
230 fprintf (stderr, "%s: ", program_name);
233 va_start (args, message);
234 error_tail (status, errnum, message, args);
237 _IO_funlockfile (stderr);
238 # ifdef __libc_ptf_call
239 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
244 /* Sometimes we want to have at most one error per line. This
245 variable controls whether this mode is selected or not. */
246 int error_one_per_line;
249 error_at_line (int status, int errnum, const char *file_name,
250 unsigned int line_number, const char *message, ...)
254 if (error_one_per_line)
256 static const char *old_file_name;
257 static unsigned int old_line_number;
259 if (old_line_number == line_number
260 && (file_name == old_file_name
261 || strcmp (old_file_name, file_name) == 0))
262 /* Simply return and print nothing. */
265 old_file_name = file_name;
266 old_line_number = line_number;
269 #if defined _LIBC && defined __libc_ptf_call
270 /* We do not want this call to be cut short by a thread
271 cancellation. Therefore disable cancellation for now. */
272 int state = PTHREAD_CANCEL_ENABLE;
273 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
279 _IO_flockfile (stderr);
281 if (error_print_progname)
282 (*error_print_progname) ();
286 if (_IO_fwide (stderr, 0) > 0)
287 __fwprintf (stderr, L"%s: ", program_name);
290 fprintf (stderr, "%s:", program_name);
293 if (file_name != NULL)
296 if (_IO_fwide (stderr, 0) > 0)
297 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
300 fprintf (stderr, "%s:%d: ", file_name, line_number);
303 va_start (args, message);
304 error_tail (status, errnum, message, args);
307 _IO_funlockfile (stderr);
308 # ifdef __libc_ptf_call
309 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
315 /* Make the weak alias. */
317 # undef error_at_line
318 weak_alias (__error, error)
319 weak_alias (__error_at_line, error_at_line)