strerror_r.c revision 1.5
1/* $NetBSD: strerror_r.c,v 1.5 2020/03/25 16:15:41 kre 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 1.5 2020/03/25 16:15:41 kre Exp $"); 34 35#include "namespace.h" 36#include <assert.h> 37#include <errno.h> 38#include <stdio.h> 39#include <string.h> 40#include <stdio.h> /* for sys_nerr on FreeBSD */ 41#ifdef NLS 42#include <limits.h> 43#include <nl_types.h> 44#define __SETLOCALE_SOURCE__ 45#include <locale.h> 46#include "setlocale_local.h" 47#endif 48 49#include "extern.h" 50 51__weak_alias(strerror_r, _strerror_r) 52 53int 54_strerror_lr(int num, char *buf, size_t buflen, locale_t loc) 55{ 56#define UPREFIX "Unknown error: %d" 57 unsigned int errnum = num; 58 int retval = 0; 59 size_t slen; 60 int saved_errno = errno; 61#ifdef NLS 62 nl_catd catd; 63 catd = catopen_l("libc", NL_CAT_LOCALE, loc); 64#endif 65 _DIAGASSERT(buf != NULL); 66 67 if (errnum < (unsigned int) sys_nerr) { 68#ifdef NLS 69 slen = strlcpy(buf, catgets(catd, 1, num, 70 sys_errlist[errnum]), buflen); 71#else 72 slen = strlcpy(buf, sys_errlist[errnum], buflen); 73#endif 74 } else { 75#ifdef NLS 76 slen = snprintf_l(buf, buflen, loc, 77 catgets(catd, 1, 0xffff, UPREFIX), num); 78#else 79 slen = snprintf(buf, buflen, UPREFIX, num); 80#endif 81 retval = EINVAL; 82 } 83 84 if (slen >= buflen) 85 retval = ERANGE; 86 87#ifdef NLS 88 catclose(catd); 89#endif 90 errno = saved_errno; 91 92 return retval; 93} 94 95int 96strerror_r(int num, char *buf, size_t buflen) 97{ 98#ifdef NLS 99 return _strerror_lr(num, buf, buflen, _current_locale()); 100#else 101 return _strerror_lr(num, buf, buflen, NULL); 102#endif 103} 104