1 /* Error handler for noninteractive utilities
2 Copyright (C) 1990-1998, 2000, 2001, 2002, 2003 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
96 # include <libio/iolibio.h>
97 # define fflush(s) INTUSE(_IO_fflush) (s)
99 # define putc(c, fp) INTUSE(_IO_putc) (c, fp)
101 #else /* not _LIBC */
103 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
104 # ifndef HAVE_DECL_STRERROR_R
105 "this configure-time declaration test was not run"
110 /* The calling program should define program_name and set it to the
111 name of the executing program. */
112 extern char *program_name;
114 # if HAVE_STRERROR_R || defined strerror_r
115 # define __strerror_r strerror_r
118 # ifndef HAVE_DECL_STRERROR
119 "this configure-time declaration test was not run"
121 # if !HAVE_DECL_STRERROR
126 private_strerror (int errnum)
128 extern char *sys_errlist[];
131 if (errnum > 0 && errnum <= sys_nerr)
132 return _(sys_errlist[errnum]);
133 return _("Unknown system error");
135 # define strerror private_strerror
136 # endif /* HAVE_STRERROR */
137 # endif /* HAVE_STRERROR_R || defined strerror_r */
138 #endif /* not _LIBC */
141 print_errno_message (int errnum)
145 #if defined HAVE_STRERROR_R || _LIBC
147 # if STRERROR_R_CHAR_P || _LIBC
148 s = __strerror_r (errnum, errbuf, sizeof errbuf);
150 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
156 s = strerror (errnum);
161 s = _("Unknown system error");
165 if (_IO_fwide (stderr, 0) > 0)
167 __fwprintf (stderr, L": %s", s);
172 fprintf (stderr, ": %s", s);
177 error_tail (int status, int errnum, const char *message, va_list args)
179 # if HAVE_VPRINTF || _LIBC
181 if (_IO_fwide (stderr, 0) > 0)
183 # define ALLOCA_LIMIT 2000
184 size_t len = strlen (message) + 1;
185 wchar_t *wmessage = NULL;
192 if (len < ALLOCA_LIMIT)
193 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
196 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
199 wmessage = (wchar_t *) realloc (wmessage,
200 len * sizeof (wchar_t));
202 if (wmessage == NULL)
204 fputws_unlocked (L"out of memory\n", stderr);
209 memset (&st, '\0', sizeof (st));
212 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
214 if (res == (size_t) -1)
215 /* The string cannot be converted. */
216 wmessage = (wchar_t *) L"???";
218 __vfwprintf (stderr, wmessage, args);
222 vfprintf (stderr, message, args);
224 _doprnt (message, args, stderr);
228 ++error_message_count;
230 print_errno_message (errnum);
232 if (_IO_fwide (stderr, 0) > 0)
233 putwc (L'\n', stderr);
244 /* Print the program name and error message MESSAGE, which is a printf-style
245 format string with optional args.
246 If ERRNUM is nonzero, print its corresponding system error message.
247 Exit with status STATUS if it is nonzero. */
250 #if defined VA_START && __STDC__
251 error (int status, int errnum, const char *message, ...)
253 error (status, errnum, message, va_alist)
266 _IO_flockfile (stderr);
268 if (error_print_progname)
269 (*error_print_progname) ();
273 if (_IO_fwide (stderr, 0) > 0)
274 __fwprintf (stderr, L"%s: ", program_name);
277 fprintf (stderr, "%s: ", program_name);
281 VA_START (args, message);
282 error_tail (status, errnum, message, args);
284 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
286 ++error_message_count;
288 print_errno_message (errnum);
296 _IO_funlockfile (stderr);
300 /* Sometimes we want to have at most one error per line. This
301 variable controls whether this mode is selected or not. */
302 int error_one_per_line;
305 #if defined VA_START && __STDC__
306 error_at_line (int status, int errnum, const char *file_name,
307 unsigned int line_number, const char *message, ...)
309 error_at_line (status, errnum, file_name, line_number, message, va_alist)
312 const char *file_name;
313 unsigned int line_number;
322 if (error_one_per_line)
324 static const char *old_file_name;
325 static unsigned int old_line_number;
327 if (old_line_number == line_number
328 && (file_name == old_file_name
329 || strcmp (old_file_name, file_name) == 0))
330 /* Simply return and print nothing. */
333 old_file_name = file_name;
334 old_line_number = line_number;
339 _IO_flockfile (stderr);
341 if (error_print_progname)
342 (*error_print_progname) ();
346 if (_IO_fwide (stderr, 0) > 0)
347 __fwprintf (stderr, L"%s: ", program_name);
350 fprintf (stderr, "%s:", program_name);
353 if (file_name != NULL)
356 if (_IO_fwide (stderr, 0) > 0)
357 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
360 fprintf (stderr, "%s:%d: ", file_name, line_number);
364 VA_START (args, message);
365 error_tail (status, errnum, message, args);
367 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
369 ++error_message_count;
371 print_errno_message (errnum);
379 _IO_funlockfile (stderr);
384 /* Make the weak alias. */
386 # undef error_at_line
387 weak_alias (__error, error)
388 weak_alias (__error_at_line, error_at_line)