/* $NetBSD: gai_strerror.c,v 1.1.1.1 2009/04/12 15:33:35 christos Exp $ */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 2001 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #ifdef DO_PTHREADS #include #include #endif static const char *gai_errlist[] = { "no error", "address family not supported for name",/*%< EAI_ADDRFAMILY */ "temporary failure", /*%< EAI_AGAIN */ "invalid flags", /*%< EAI_BADFLAGS */ "permanent failure", /*%< EAI_FAIL */ "address family not supported", /*%< EAI_FAMILY */ "memory failure", /*%< EAI_MEMORY */ "no address", /*%< EAI_NODATA */ "unknown name or service", /*%< EAI_NONAME */ "service not supported for socktype", /*%< EAI_SERVICE */ "socktype not supported", /*%< EAI_SOCKTYPE */ "system failure", /*%< EAI_SYSTEM */ "bad hints", /*%< EAI_BADHINTS */ "bad protocol", /*%< EAI_PROTOCOL */ "unknown error" /*%< Must be last. */ }; static const int gai_nerr = (sizeof(gai_errlist)/sizeof(*gai_errlist)); #define EAI_BUFSIZE 128 const char * gai_strerror(int ecode) { #ifndef DO_PTHREADS static char buf[EAI_BUFSIZE]; #else /* DO_PTHREADS */ #ifndef LIBBIND_MUTEX_INITIALIZER #define LIBBIND_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER #endif static pthread_mutex_t lock = LIBBIND_MUTEX_INITIALIZER; static pthread_key_t key; static int once = 0; char *buf; #endif if (ecode >= 0 && ecode < (gai_nerr - 1)) return (gai_errlist[ecode]); #ifdef DO_PTHREADS if (!once) { if (pthread_mutex_lock(&lock) != 0) goto unknown; if (!once) { if (pthread_key_create(&key, free) != 0) { (void)pthread_mutex_unlock(&lock); goto unknown; } once = 1; } if (pthread_mutex_unlock(&lock) != 0) goto unknown; } buf = pthread_getspecific(key); if (buf == NULL) { buf = malloc(EAI_BUFSIZE); if (buf == NULL) goto unknown; if (pthread_setspecific(key, buf) != 0) { free(buf); goto unknown; } } #endif /* * XXX This really should be snprintf(buf, EAI_BUFSIZE, ...). * It is safe until message catalogs are used. */ sprintf(buf, "%s: %d", gai_errlist[gai_nerr - 1], ecode); return (buf); #ifdef DO_PTHREADS unknown: return ("unknown error"); #endif } /*! \file */