1/** @file
2    Implementation of perror as declared in <stdio.h>.
3
4    Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
5    This program and the accompanying materials are licensed and made available
6    under the terms and conditions of the BSD License that accompanies this
7    distribution.  The full text of the license may be found at
8    http://opensource.org/licenses/bsd-license.php.
9
10    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13    Portions Copyright (c) 1990, 1993
14    The Regents of the University of California.  All rights reserved.
15
16    Redistribution and use in source and binary forms, with or without
17    modification, are permitted provided that the following conditions
18    are met:
19      - Redistributions of source code must retain the above copyright
20        notice, this list of conditions and the following disclaimer.
21      - Redistributions in binary form must reproduce the above copyright
22        notice, this list of conditions and the following disclaimer in the
23        documentation and/or other materials provided with the distribution.
24      - Neither the name of the University nor the names of its contributors
25        may be used to endorse or promote products derived from this software
26        without specific prior written permission.
27
28    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
29    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31    ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
32    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38    POSSIBILITY OF SUCH DAMAGE.
39
40    NetBSD: perror.c,v 1.24 2006/01/26 11:13:42 kleink Exp
41    perror.c  8.1 (Berkeley) 6/4/93
42**/
43#include  <LibConfig.h>
44
45#include "namespace.h"
46#include <errno.h>
47#include <limits.h>
48#include <stdio.h>
49#include <string.h>
50#include "extern.h"
51
52/*
53 * Since perror() is not allowed to change the contents of strerror()'s
54 * static buffer, both functions supply their own buffers to strerror_r().
55 */
56
57void
58perror(const char *s)
59{
60  static char buf[ASCII_STRING_MAX];
61  const char *separator;
62
63  if (s == NULL)
64    s = "";
65  if (*s == '\0')
66    separator = "";
67  else
68    separator = ": ";
69
70  (void)strerror_r(errno, buf, sizeof(buf));
71  (void)fprintf(stderr, "%s%s%s\n", s, separator, buf);
72}
73