89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/* $NetBSD: gai_strerror.c,v 1.2 2002/06/20 11:43:04 itojun Exp $ */
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/*
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* Copyright (c) 2001 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#include <port_before.h>
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#include <netdb.h>
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#include <port_after.h>
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#ifdef DO_PTHREADS
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#include <pthread.h>
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#include <stdlib.h>
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#endif
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static const char *gai_errlist[] = {
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"no error",
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"address family not supported for name",/* EAI_ADDRFAMILY */
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"temporary failure", /* EAI_AGAIN */
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"invalid flags", /* EAI_BADFLAGS */
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"permanent failure", /* EAI_FAIL */
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"address family not supported", /* EAI_FAMILY */
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"memory failure", /* EAI_MEMORY */
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"no address", /* EAI_NODATA */
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"unknown name or service", /* EAI_NONAME */
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"service not supported for socktype", /* EAI_SERVICE */
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"socktype not supported", /* EAI_SOCKTYPE */
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"system failure", /* EAI_SYSTEM */
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"bad hints", /* EAI_BADHINTS */
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"bad protocol", /* EAI_PROTOCOL */
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"unknown error" /* Must be last. */
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};
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static const int gai_nerr = (sizeof(gai_errlist)/sizeof(*gai_errlist));
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#define EAI_BUFSIZE 128
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const char *
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gai_strerror(int ecode) {
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#ifndef DO_PTHREADS
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static char buf[EAI_BUFSIZE];
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#else /* DO_PTHREADS */
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static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_key_t key;
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static int once = 0;
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char *buf;
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#endif
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if (ecode >= 0 && ecode < (gai_nerr - 1))
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return (gai_errlist[ecode]);
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#ifdef DO_PTHREADS
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if (!once) {
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pthread_mutex_lock(&lock);
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if (!once++)
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pthread_key_create(&key, free);
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pthread_mutex_unlock(&lock);
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}
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buf = pthread_getspecific(key);
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if (buf == NULL) {
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buf = malloc(EAI_BUFSIZE);
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if (buf == NULL)
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return ("unknown error");
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pthread_setspecific(key, buf);
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}
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#endif
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/*
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* XXX This really should be snprintf(buf, EAI_BUFSIZE, ...).
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* It is safe until message catalogs are used.
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*/
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sprintf(buf, "%s: %d", gai_errlist[gai_nerr - 1], ecode);
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return (buf);
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}
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