1 /*- 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #if defined(NLS) 37 #include <nl_types.h> 38 #endif 39 40 #include <limits.h> 41 #include <errno.h> 42 #include <string.h> 43 #include <stdio.h> 44 45 #include "errlst.h" 46 47 #define UPREFIX "Unknown error" 48 49 /* 50 * Define a buffer size big enough to describe a 64-bit signed integer 51 * converted to ASCII decimal (19 bytes), with an optional leading sign 52 * (1 byte); finally, we get the prefix, delimiter (": ") and a trailing 53 * NUL from UPREFIX. 54 */ 55 #define EBUFSIZE (20 + 2 + sizeof(UPREFIX)) 56 57 /* 58 * Doing this by hand instead of linking with stdio(3) avoids bloat for 59 * statically linked binaries. 60 */ 61 static void 62 errstr(int num, char *uprefix, char *buf, size_t len) 63 { 64 char *t; 65 unsigned int uerr; 66 char tmp[EBUFSIZE]; 67 68 t = tmp + sizeof(tmp); 69 *--t = '\0'; 70 uerr = (num >= 0) ? num : -num; 71 do { 72 *--t = "0123456789"[uerr % 10]; 73 } while (uerr /= 10); 74 if (num < 0) 75 *--t = '-'; 76 *--t = ' '; 77 *--t = ':'; 78 strlcpy(buf, uprefix, len); 79 strlcat(buf, t, len); 80 } 81 82 int 83 strerror_r(int errnum, char *strerrbuf, size_t buflen) 84 { 85 int retval = 0; 86 #if defined(NLS) 87 int saved_errno = errno; 88 nl_catd catd; 89 catd = catopen("libc", NL_CAT_LOCALE); 90 #endif 91 92 if (errnum < 0 || errnum >= __hidden_sys_nerr) { 93 errstr(errnum, 94 #if defined(NLS) 95 catgets(catd, 1, 0xffff, UPREFIX), 96 #else 97 UPREFIX, 98 #endif 99 strerrbuf, buflen); 100 retval = EINVAL; 101 } else { 102 if (strlcpy(strerrbuf, 103 #if defined(NLS) 104 catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]), 105 #else 106 __hidden_sys_errlist[errnum], 107 #endif 108 buflen) >= buflen) 109 retval = ERANGE; 110 } 111 112 #if defined(NLS) 113 catclose(catd); 114 errno = saved_errno; 115 #endif 116 117 return (retval); 118 } 119 120 char * 121 strerror(int num) 122 { 123 static char ebuf[NL_TEXTMAX]; 124 125 if (strerror_r(num, ebuf, sizeof(ebuf)) != 0) 126 errno = EINVAL; 127 return (ebuf); 128 } 129