strerror_r.c revision 1.2
1/* $NetBSD: strerror_r.c,v 1.2 2005/07/30 15:21:21 christos 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#if defined(LIBC_SCCS) && !defined(lint) 34#if 0 35static char *sccsid = "@(#)strerror.c 5.6 (Berkeley) 5/4/91"; 36#else 37__RCSID("$NetBSD: strerror_r.c,v 1.2 2005/07/30 15:21:21 christos Exp $"); 38#endif 39#endif /* LIBC_SCCS and not lint */ 40 41#include "namespace.h" 42#ifdef NLS 43#include <limits.h> 44#include <nl_types.h> 45#endif 46 47#include <assert.h> 48#include <errno.h> 49#include <stdio.h> 50#include <string.h> 51#include "extern.h" 52 53#ifdef _LIBC 54# ifdef __weak_alias 55__weak_alias(strerror_r, _strerror_r) 56# endif 57#endif 58 59int 60#ifdef _LIBC 61_strerror_r(int num, char *buf, size_t buflen) 62#else 63strerror_r(int num, char *buf, size_t buflen) 64#endif 65{ 66#define UPREFIX "Unknown error: %u" 67 unsigned int errnum = num; 68 int retval = 0; 69 size_t slen; 70#ifdef NLS 71 int saved_errno = errno; 72 nl_catd catd; 73 catd = catopen("libc", NL_CAT_LOCALE); 74#endif 75 _DIAGASSERT(buf != NULL); 76 77 if (errnum < (unsigned int) sys_nerr) { 78#ifdef NLS 79 slen = strlcpy(buf, catgets(catd, 1, (int)errnum, 80 sys_errlist[errnum]), buflen); 81#else 82 slen = strlcpy(buf, sys_errlist[errnum], buflen); 83#endif 84 } else { 85#ifdef NLS 86 slen = snprintf(buf, buflen, 87 catgets(catd, 1, 0xffff, UPREFIX), errnum); 88#else 89 slen = snprintf(buf, buflen, UPREFIX, errnum); 90#endif 91 retval = EINVAL; 92 } 93 94 if (slen >= buflen) 95 retval = ERANGE; 96 97#ifdef NLS 98 catclose(catd); 99 errno = saved_errno; 100#endif 101 102 return retval; 103} 104