108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/* $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 <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) {
|
|
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 */
|