assert/assert-perr.c

   1 /* Copyright (C) 1994,1995,1996,1997,1998,2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <assert.h>
  20 #include <libintl.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <sysdep.h>
  25
  26
  27 extern const char *__progname;
  28
  29 #ifdef USE_IN_LIBIO
  30 # include <wchar.h>
  31 # include <libio/iolibio.h>
  32 # define fflush(s) _IO_fflush (s)
  33 #endif
  34
  35 /* This function, when passed an error number, a filename, and a line
  36    number, prints a message on the standard error stream of the form:
  37         a.c:10: foobar: Unexpected error: Computer bought the farm
  38    It then aborts program execution via a call to `abort'.  */
  39
  40 #ifdef FATAL_PREPARE_INCLUDE
  41 # include FATAL_PREPARE_INCLUDE
  42 #endif
  43
  44 void
  45 __assert_perror_fail (int errnum,
  46                       const char *file, unsigned int line,
  47                       const char *function)
  48 {
  49   char errbuf[1024];
  50   char *buf;
  51
  52 #ifdef FATAL_PREPARE
  53   FATAL_PREPARE;
  54 #endif
  55
  56   (void) __asprintf (&buf, _("%s%s%s:%u: %s%sUnexpected error: %s.\n"),
  57                      __progname, __progname[0] ? ": " : "",
  58                      file, line,
  59                      function ? function : "", function ? ": " : "",
  60                      __strerror_r (errnum, errbuf, sizeof errbuf));
  61
  62   /* Print the message.  */
  63 #ifdef USE_IN_LIBIO
  64   if (_IO_fwide (stderr, 0) > 0)
  65     (void) __fwprintf (stderr, L"%s", buf);
  66   else
  67 #endif
  68     (void) fputs (buf, stderr);
  69
  70   (void) fflush (stderr);
  71
  72   /* We have to free the buffer since the appplication might catch the
  73      SIGABRT.  */
  74   free (buf);
  75
  76   abort ();
  77 }