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