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"
94 # define SIZE_MAX ((size_t) -1)
97 /* The calling program should define program_name and set it to the
98 name of the executing program. */
99 extern char *program_name;
101 # if HAVE_STRERROR_R || defined strerror_r
102 # define __strerror_r strerror_r
104 #endif /* not _LIBC */
107 print_errno_message (int errnum)
111 #if defined HAVE_STRERROR_R || _LIBC
113 # if STRERROR_R_CHAR_P || _LIBC
114 s = __strerror_r (errnum, errbuf, sizeof errbuf);
116 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
122 s = strerror (errnum);
127 s = _("Unknown system error");
131 if (_IO_fwide (stderr, 0) > 0)
133 __fwprintf (stderr, L": %s", s);
138 fprintf (stderr, ": %s", s);
142 error_tail (int status, int errnum, const char *message, va_list args)
145 if (_IO_fwide (stderr, 0) > 0)
147 # define ALLOCA_LIMIT 2000
148 size_t len = strlen (message) + 1;
149 const wchar_t *wmessage = L"out of memory";
153 wchar_t *wbuf = (len < ALLOCA_LIMIT
154 ? (void *) alloca (len * sizeof *wbuf)
155 : len <= SIZE_MAX / sizeof *wbuf
156 ? malloc (len * sizeof *wbuf)
161 memset (&st, '\0', sizeof (st));
163 res = mbsrtowcs (wbuf, &tmp, len, &st);
164 wmessage = res == (size_t) -1 ? L"???" : wbuf;
167 __vfwprintf (stderr, wmessage, args);
168 if (! (len < ALLOCA_LIMIT))
173 vfprintf (stderr, message, args);
176 ++error_message_count;
178 print_errno_message (errnum);
180 if (_IO_fwide (stderr, 0) > 0)
181 putwc (L'\n', stderr);
191 /* Print the program name and error message MESSAGE, which is a printf-style
192 format string with optional args.
193 If ERRNUM is nonzero, print its corresponding system error message.
194 Exit with status STATUS if it is nonzero. */
196 error (int status, int errnum, const char *message, ...)
200 #if defined _LIBC && defined __libc_ptf_call
201 /* We do not want this call to be cut short by a thread
202 cancellation. Therefore disable cancellation for now. */
203 int state = PTHREAD_CANCEL_ENABLE;
204 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
210 _IO_flockfile (stderr);
212 if (error_print_progname)
213 (*error_print_progname) ();
217 if (_IO_fwide (stderr, 0) > 0)
218 __fwprintf (stderr, L"%s: ", program_name);
221 fprintf (stderr, "%s: ", program_name);
224 va_start (args, message);
225 error_tail (status, errnum, message, args);
228 _IO_funlockfile (stderr);
229 # ifdef __libc_ptf_call
230 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
235 /* Sometimes we want to have at most one error per line. This
236 variable controls whether this mode is selected or not. */
237 int error_one_per_line;
240 error_at_line (int status, int errnum, const char *file_name,
241 unsigned int line_number, const char *message, ...)
245 if (error_one_per_line)
247 static const char *old_file_name;
248 static unsigned int old_line_number;
250 if (old_line_number == line_number
251 && (file_name == old_file_name
252 || strcmp (old_file_name, file_name) == 0))
253 /* Simply return and print nothing. */
256 old_file_name = file_name;
257 old_line_number = line_number;
260 #if defined _LIBC && defined __libc_ptf_call
261 /* We do not want this call to be cut short by a thread
262 cancellation. Therefore disable cancellation for now. */
263 int state = PTHREAD_CANCEL_ENABLE;
264 __libc_ptf_call (pthread_setcancelstate, (PTHREAD_CANCEL_DISABLE, &state),
270 _IO_flockfile (stderr);
272 if (error_print_progname)
273 (*error_print_progname) ();
277 if (_IO_fwide (stderr, 0) > 0)
278 __fwprintf (stderr, L"%s: ", program_name);
281 fprintf (stderr, "%s:", program_name);
284 if (file_name != NULL)
287 if (_IO_fwide (stderr, 0) > 0)
288 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
291 fprintf (stderr, "%s:%d: ", file_name, line_number);
294 va_start (args, message);
295 error_tail (status, errnum, message, args);
298 _IO_funlockfile (stderr);
299 # ifdef __libc_ptf_call
300 __libc_ptf_call (pthread_setcancelstate, (state, NULL), 0);
306 /* Make the weak alias. */
308 # undef error_at_line
309 weak_alias (__error, error)
310 weak_alias (__error_at_line, error_at_line)