assert-perr.c

一个C源代码分析器

/* Copyright (C) 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <sysdep.h>


extern const char *__assert_program_name; /* In assert.c.  */

/* This function, when passed an error number, a filename, and a line
   number, prints a message on the standard error stream of the form:
   	a.c:10: foobar: Unexpected error: Computer bought the farm
   It then aborts program execution via a call to `abort'.  */

__NORETURN int
__assert_perror_fail (int errnum,
		      const char *file, unsigned int line,
		      const char *function)
{
#ifdef FATAL_PREPARE
  FATAL_PREPARE;
#endif

  /* Print the message.  */
  (void) fprintf (stderr, "%s%s%s:%u: %s%sUnexpected error: %s.\n",
		  __assert_program_name ? __assert_program_name : "",
		  __assert_program_name ? ": " : "",
		  file, line,
		  function ? function : "", function ? ": " : "",
		  strerror (errnum));
  (void) fflush (stderr);

  abort ();

  /* This function never returns, so making it void would make sense,
     but returning something makes the assert macro easier to write.  */
  return 0;
}