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
57 #include "unlocked-io.h"
60 # define _(String) String
63 /* If NULL, error will flush stdout, then print on stderr the program
64 name, a colon and a space. Otherwise, error will call this
65 function without parameters instead. */
66 void (*error_print_progname) (
72 /* This variable is incremented each time `error' is called. */
73 unsigned int error_message_count;
76 /* In the GNU C library, there is a predefined variable for this. */
78 # define program_name program_invocation_name
81 /* In GNU libc we want do not want to use the common name `error' directly.
82 Instead make it a weak alias. */
83 extern void __error (int status, int errnum, const char *message, ...)
84 __attribute__ ((__format__ (__printf__, 3, 4)));
85 extern void __error_at_line (int status, int errnum, const char *file_name,
86 unsigned int line_number, const char *message,
88 __attribute__ ((__format__ (__printf__, 5, 6)));;
89 # define error __error
90 # define error_at_line __error_at_line
93 # include <libio/iolibio.h>
94 # define fflush(s) _IO_fflush (s)
99 # if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
100 # ifndef HAVE_DECL_STRERROR_R
101 "this configure-time declaration test was not run"
106 /* The calling program should define program_name and set it to the
107 name of the executing program. */
108 extern char *program_name;
110 # if HAVE_STRERROR_R || defined strerror_r
111 # define __strerror_r strerror_r
114 # ifndef HAVE_DECL_STRERROR
115 "this configure-time declaration test was not run"
117 # if !HAVE_DECL_STRERROR
122 private_strerror (int errnum)
124 extern char *sys_errlist[];
127 if (errnum > 0 && errnum <= sys_nerr)
128 return _(sys_errlist[errnum]);
129 return _("Unknown system error");
131 # define strerror private_strerror
132 # endif /* HAVE_STRERROR */
133 # endif /* HAVE_STRERROR_R || defined strerror_r */
134 #endif /* not _LIBC */
137 print_errno_message (int errnum)
141 #if defined HAVE_STRERROR_R || _LIBC
143 # if STRERROR_R_CHAR_P || _LIBC
144 s = __strerror_r (errnum, errbuf, sizeof errbuf);
146 if (__strerror_r (errnum, errbuf, sizeof errbuf) == 0)
152 s = strerror (errnum);
157 s = _("Unknown system error");
160 #if _LIBC && USE_IN_LIBIO
161 if (_IO_fwide (stderr, 0) > 0)
163 __fwprintf (stderr, L": %s", s);
168 fprintf (stderr, ": %s", s);
173 error_tail (int status, int errnum, const char *message, va_list args)
175 # if HAVE_VPRINTF || _LIBC
176 # if _LIBC && USE_IN_LIBIO
177 if (_IO_fwide (stderr, 0) > 0)
179 # define ALLOCA_LIMIT 2000
180 size_t len = strlen (message) + 1;
181 wchar_t *wmessage = NULL;
188 if (len < ALLOCA_LIMIT)
189 wmessage = (wchar_t *) alloca (len * sizeof (wchar_t));
192 if (wmessage != NULL && len / 2 < ALLOCA_LIMIT)
195 wmessage = (wchar_t *) realloc (wmessage,
196 len * sizeof (wchar_t));
198 if (wmessage == NULL)
200 fputws_unlocked (L"out of memory\n", stderr);
205 memset (&st, '\0', sizeof (st));
208 while ((res = mbsrtowcs (wmessage, &tmp, len, &st)) == len);
210 if (res == (size_t) -1)
211 /* The string cannot be converted. */
212 wmessage = (wchar_t *) L"???";
214 __vfwprintf (stderr, wmessage, args);
218 vfprintf (stderr, message, args);
220 _doprnt (message, args, stderr);
224 ++error_message_count;
226 print_errno_message (errnum);
227 # if _LIBC && USE_IN_LIBIO
228 if (_IO_fwide (stderr, 0) > 0)
229 putwc (L'\n', stderr);
240 /* Print the program name and error message MESSAGE, which is a printf-style
241 format string with optional args.
242 If ERRNUM is nonzero, print its corresponding system error message.
243 Exit with status STATUS if it is nonzero. */
246 #if defined VA_START && __STDC__
247 error (int status, int errnum, const char *message, ...)
249 error (status, errnum, message, va_alist)
263 _IO_flockfile (stderr);
265 __flockfile (stderr);
268 if (error_print_progname)
269 (*error_print_progname) ();
272 #if _LIBC && USE_IN_LIBIO
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);
297 _IO_funlockfile (stderr);
299 __funlockfile (stderr);
304 /* Sometimes we want to have at most one error per line. This
305 variable controls whether this mode is selected or not. */
306 int error_one_per_line;
309 #if defined VA_START && __STDC__
310 error_at_line (int status, int errnum, const char *file_name,
311 unsigned int line_number, const char *message, ...)
313 error_at_line (status, errnum, file_name, line_number, message, va_alist)
316 const char *file_name;
317 unsigned int line_number;
326 if (error_one_per_line)
328 static const char *old_file_name;
329 static unsigned int old_line_number;
331 if (old_line_number == line_number
332 && (file_name == old_file_name
333 || strcmp (old_file_name, file_name) == 0))
334 /* Simply return and print nothing. */
337 old_file_name = file_name;
338 old_line_number = line_number;
344 _IO_flockfile (stderr);
346 __flockfile (stderr);
349 if (error_print_progname)
350 (*error_print_progname) ();
353 #if _LIBC && USE_IN_LIBIO
354 if (_IO_fwide (stderr, 0) > 0)
355 __fwprintf (stderr, L"%s: ", program_name);
358 fprintf (stderr, "%s:", program_name);
361 if (file_name != NULL)
363 #if _LIBC && USE_IN_LIBIO
364 if (_IO_fwide (stderr, 0) > 0)
365 __fwprintf (stderr, L"%s:%d: ", file_name, line_number);
368 fprintf (stderr, "%s:%d: ", file_name, line_number);
372 VA_START (args, message);
373 error_tail (status, errnum, message, args);
375 fprintf (stderr, message, a1, a2, a3, a4, a5, a6, a7, a8);
377 ++error_message_count;
379 print_errno_message (errnum);
388 _IO_funlockfile (stderr);
390 __funlockfile (stderr);
396 /* Make the weak alias. */
398 # undef error_at_line
399 weak_alias (__error, error)
400 weak_alias (__error_at_line, error_at_line)