1/* Print a message describing error code.
2   Copyright (C) 2008-2012 Free Software Foundation, Inc.
3   Written by Bruno Haible and Simon Josefsson.
4
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 3 of the License, or
8   (at your option) any later version.
9
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.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include <stdio.h>
22
23#include <errno.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include "strerror-override.h"
28
29/* Use the system functions, not the gnulib overrides in this file.  */
30#undef fprintf
31
32void
33perror (const char *string)
34{
35  char stackbuf[STACKBUF_LEN];
36  int ret;
37
38  /* Our implementation guarantees that this will be a non-empty
39     string, even if it returns EINVAL; and stackbuf should be sized
40     large enough to avoid ERANGE.  */
41  ret = strerror_r (errno, stackbuf, sizeof stackbuf);
42  if (ret == ERANGE)
43    abort ();
44
45  if (string != NULL && *string != '\0')
46    fprintf (stderr, "%s: %s\n", string, stackbuf);
47  else
48    fprintf (stderr, "%s\n", stackbuf);
49}
50