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