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/*
* 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 <port_before.h>
#include <netdb.h>
#include <port_after.h>
#ifdef DO_PTHREADS
#include <pthread.h>
#include <stdlib.h>
#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) {
pthread_mutex_lock(&lock);
if (!once++)
pthread_key_create(&key, free);
pthread_mutex_unlock(&lock);
}
buf = pthread_getspecific(key);
if (buf == NULL) {
buf = malloc(EAI_BUFSIZE);
if (buf == NULL)
return ("unknown error");
pthread_setspecific(key, buf);
}
#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);
}
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