1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. 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 #if defined(LIBC_SCCS) && !defined(lint) 33 static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; 34 #endif /* LIBC_SCCS and not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #if defined(NLS) 39 #include <nl_types.h> 40 #endif 41 42 #include <limits.h> 43 #include <errno.h> 44 #include <string.h> 45 #include <stdio.h> 46 47 #include "errlst.h" 48 #include "../locale/xlocale_private.h" 49 #include "libc_private.h" 50 51 /* 52 * Define buffer big enough to contain delimiter (": ", 2 bytes), 53 * 64-bit signed integer converted to ASCII decimal (19 bytes) with 54 * optional leading sign (1 byte), and a trailing NUL. 55 */ 56 #define EBUFSIZE (2 + 19 + 1 + 1) 57 58 /* 59 * Doing this by hand instead of linking with stdio(3) avoids bloat for 60 * statically linked binaries. 61 */ 62 static void 63 errstr(int num, const char *uprefix, char *buf, size_t len) 64 { 65 char *t; 66 unsigned int uerr; 67 char tmp[EBUFSIZE]; 68 69 t = tmp + sizeof(tmp); 70 *--t = '\0'; 71 uerr = (num >= 0) ? num : -num; 72 do { 73 *--t = "0123456789"[uerr % 10]; 74 } while (uerr /= 10); 75 if (num < 0) 76 *--t = '-'; 77 *--t = ' '; 78 *--t = ':'; 79 strlcpy(buf, uprefix, len); 80 strlcat(buf, t, len); 81 } 82 83 static int 84 strerror_rl(int errnum, char *strerrbuf, size_t buflen, locale_t locale) 85 { 86 int retval = 0; 87 #if defined(NLS) 88 int saved_errno = errno; 89 nl_catd catd; 90 91 catd = __catopen_l("libc", NL_CAT_LOCALE, locale); 92 #endif 93 94 if (errnum < 0 || errnum >= __hidden_sys_nerr) { 95 errstr(errnum, 96 #if defined(NLS) 97 catgets(catd, 1, 0xffff, __uprefix), 98 #else 99 __uprefix, 100 #endif 101 strerrbuf, buflen); 102 retval = EINVAL; 103 } else { 104 if (strlcpy(strerrbuf, 105 #if defined(NLS) 106 catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]), 107 #else 108 __hidden_sys_errlist[errnum], 109 #endif 110 buflen) >= buflen) 111 retval = ERANGE; 112 } 113 114 #if defined(NLS) 115 catclose(catd); 116 errno = saved_errno; 117 #endif 118 119 return (retval); 120 } 121 122 int 123 strerror_r(int errnum, char *strerrbuf, size_t buflen) 124 { 125 return (strerror_rl(errnum, strerrbuf, buflen, __get_locale())); 126 } 127 128 char * 129 strerror_l(int num, locale_t locale) 130 { 131 static _Thread_local char ebuf[NL_TEXTMAX]; 132 133 if (strerror_rl(num, ebuf, sizeof(ebuf), locale) != 0) 134 errno = EINVAL; 135 return (ebuf); 136 } 137 138 char * 139 strerror(int num) 140 { 141 static char ebuf[NL_TEXTMAX]; 142 143 if (strerror_rl(num, ebuf, sizeof(ebuf), __get_locale()) != 0) 144 errno = EINVAL; 145 return (ebuf); 146 } 147