1139825Simp/*- 2112899Sjeff * Copyright (c) 1988, 1993 3112899Sjeff * The Regents of the University of California. All rights reserved. 4112899Sjeff * 5112899Sjeff * Redistribution and use in source and binary forms, with or without 6112899Sjeff * modification, are permitted provided that the following conditions 7112899Sjeff * are met: 8112899Sjeff * 1. Redistributions of source code must retain the above copyright 9112899Sjeff * notice, this list of conditions and the following disclaimer. 10112899Sjeff * 2. Redistributions in binary form must reproduce the above copyright 11112899Sjeff * notice, this list of conditions and the following disclaimer in the 12112899Sjeff * documentation and/or other materials provided with the distribution. 13112899Sjeff * 3. Neither the name of the University nor the names of its contributors 14112899Sjeff * may be used to endorse or promote products derived from this software 15112899Sjeff * without specific prior written permission. 16112899Sjeff * 17112899Sjeff * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18112899Sjeff * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19112899Sjeff * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20112899Sjeff * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21112899Sjeff * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22112899Sjeff * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23112899Sjeff * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24112899Sjeff * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25112899Sjeff * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26112899Sjeff * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27112899Sjeff * SUCH DAMAGE. 28112899Sjeff */ 29112899Sjeff 30112899Sjeff#if defined(LIBC_SCCS) && !defined(lint) 31112899Sjeffstatic char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; 32112899Sjeff#endif /* LIBC_SCCS and not lint */ 33160254Sdavidxu#include <sys/cdefs.h> 34160254Sdavidxu__FBSDID("$FreeBSD: releng/10.3/lib/libc/string/strerror.c 255108 2013-08-31 22:32:42Z jilles $"); 35145434Sdavidxu 36145434Sdavidxu#if defined(NLS) 37145434Sdavidxu#include <nl_types.h> 38145434Sdavidxu#endif 39112899Sjeff 40145434Sdavidxu#include <limits.h> 41145434Sdavidxu#include <errno.h> 42145434Sdavidxu#include <string.h> 43145434Sdavidxu#include <stdio.h> 44145434Sdavidxu 45145434Sdavidxu#include "errlst.h" 46145434Sdavidxu 47145434Sdavidxu#define UPREFIX "Unknown error" 48145434Sdavidxu 49145434Sdavidxu/* 50162497Sdavidxu * Define a buffer size big enough to describe a 64-bit signed integer 51162497Sdavidxu * converted to ASCII decimal (19 bytes), with an optional leading sign 52145434Sdavidxu * (1 byte); finally, we get the prefix, delimiter (": ") and a trailing 53145434Sdavidxu * NUL from UPREFIX. 54112899Sjeff */ 55112899Sjeff#define EBUFSIZE (20 + 2 + sizeof(UPREFIX)) 56112899Sjeff 57112899Sjeff/* 58112899Sjeff * Doing this by hand instead of linking with stdio(3) avoids bloat for 59131431Smarcel * statically linked binaries. 60145434Sdavidxu */ 61131431Smarcelstatic void 62136192Smtmerrstr(int num, char *uprefix, char *buf, size_t len) 63131431Smarcel{ 64127482Smtm char *t; 65131431Smarcel unsigned int uerr; 66155327Sdavidxu char tmp[EBUFSIZE]; 67112899Sjeff 68112899Sjeff t = tmp + sizeof(tmp); 69112899Sjeff *--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 82int 83strerror_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 120char * 121strerror(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