/*- * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)strerror.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: src/lib/libc/string/strerror.c,v 1.16 2007/01/09 00:28:12 imp Exp $"); #if defined(NLS) #include <nl_types.h> #endif #include <limits.h> #include <errno.h> #include <string.h> #include <stdio.h> #define UPREFIX "Unknown error" /* * Define a buffer size big enough to describe a 64-bit signed integer * converted to ASCII decimal (19 bytes), with an optional leading sign * (1 byte); finally, we get the prefix, delimiter (": ") and a trailing * NUL from UPREFIX. */ #define EBUFSIZE (20 + 2 + sizeof(UPREFIX)) #ifndef BUILDING_VARIANT /* * Doing this by hand instead of linking with stdio(3) avoids bloat for * statically linked binaries. */ __private_extern__ void __errstr(int num, char *uprefix, char *buf, size_t len) { char *t; unsigned int uerr; char tmp[EBUFSIZE]; t = tmp + sizeof(tmp); *--t = '\0'; uerr = (num >= 0) ? num : -num; do { *--t = "0123456789"[uerr % 10]; } while (uerr /= 10); if (num < 0) *--t = '-'; *--t = ' '; *--t = ':'; strlcpy(buf, uprefix, len); strlcat(buf, t, len); } int strerror_r(int errnum, char *strerrbuf, size_t buflen) { int retval = 0; #if defined(NLS) int saved_errno = errno; nl_catd catd; catd = catopen("libc", NL_CAT_LOCALE); #endif if (errnum < 0 || errnum >= sys_nerr) { __errstr(errnum, #if defined(NLS) catgets(catd, 1, 0xffff, UPREFIX), #else UPREFIX, #endif strerrbuf, buflen); retval = EINVAL; } else { if (strlcpy(strerrbuf, #if defined(NLS) catgets(catd, 1, errnum, sys_errlist[errnum]), #else sys_errlist[errnum], #endif buflen) >= buflen) retval = ERANGE; } #if defined(NLS) catclose(catd); errno = saved_errno; #endif return (retval); } #else /* BUILDING_VARIANT */ __private_extern__ void __errstr(int, char *, size_t); #endif /* !BUILDING_VARIANT */ char * strerror(int num) { static char ebuf[NL_TEXTMAX]; #if !__DARWIN_UNIX03 if (strerror_r(num, ebuf, sizeof(ebuf)) != 0) errno = EINVAL; #else (void)strerror_r(num, ebuf, sizeof(ebuf)); #endif return (ebuf); }