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