strerror_r.c revision 1.3 
1/*	$NetBSD: strerror_r.c,v 1.3 2013/08/19 13:03:12 joerg Exp $	*/
2
3/*
4 * Copyright (c) 1988 Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__RCSID("$NetBSD: strerror_r.c,v 1.3 2013/08/19 13:03:12 joerg Exp $");
34
35#include "namespace.h"
36#include <assert.h>
37#include <errno.h>
38#include <stdio.h>
39#include <string.h>
40#ifdef NLS
41#include <limits.h>
42#include <nl_types.h>
43#define __SETLOCALE_SOURCE__
44#include <locale.h>
45#include "setlocale_local.h"
46#endif
47
48#include "extern.h"
49
50__weak_alias(strerror_r, _strerror_r)
51
52int
53_strerror_lr(int num, char *buf, size_t buflen, locale_t loc)
54{
55#define	UPREFIX	"Unknown error: %u"
56	unsigned int errnum = num;
57	int retval = 0;
58	size_t slen;
59#ifdef NLS
60	int saved_errno = errno;
61	nl_catd catd;
62	catd = catopen_l("libc", NL_CAT_LOCALE, loc);
63#endif
64	_DIAGASSERT(buf != NULL);
65
66	if (errnum < (unsigned int) sys_nerr) {
67#ifdef NLS
68		slen = strlcpy(buf, catgets(catd, 1, (int)errnum,
69		    sys_errlist[errnum]), buflen);
70#else
71		slen = strlcpy(buf, sys_errlist[errnum], buflen);
72#endif
73	} else {
74#ifdef NLS
75		slen = snprintf_l(buf, buflen, loc,
76		    catgets(catd, 1, 0xffff, UPREFIX), errnum);
77#else
78		slen = snprintf(buf, buflen, UPREFIX, errnum);
79#endif
80		retval = EINVAL;
81	}
82
83	if (slen >= buflen)
84		retval = ERANGE;
85
86#ifdef NLS
87	catclose(catd);
88	errno = saved_errno;
89#endif
90
91	return retval;
92}
93
94int
95strerror_r(int num, char *buf, size_t buflen)
96{
97#ifdef NLS
98	return _strerror_lr(num, buf, buflen, _current_locale());
99#else
100	return _strerror_lr(num, buf, buflen, NULL);
101#endif
102}
103