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/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* 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.
* 3. Neither the name of the project 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 PROJECT 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 PROJECT 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <netdb.h>
#if defined(NLS)
#include <nl_types.h>
#include <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "reentrant.h"
#endif
#include "un-namespace.h"
/* Entries EAI_ADDRFAMILY (1) and EAI_NODATA (7) are obsoleted, but left */
/* for backward compatibility with userland code prior to 2553bis-02 */
static const char *ai_errlist[] = {
"Success", /* 0 */
"Address family for hostname not supported", /* 1 */
"Temporary failure in name resolution", /* EAI_AGAIN */
"Invalid value for ai_flags", /* EAI_BADFLAGS */
"Non-recoverable failure in name resolution", /* EAI_FAIL */
"ai_family not supported", /* EAI_FAMILY */
"Memory allocation failure", /* EAI_MEMORY */
"No address associated with hostname", /* 7 */
"hostname nor servname provided, or not known", /* EAI_NONAME */
"servname not supported for ai_socktype", /* EAI_SERVICE */
"ai_socktype not supported", /* EAI_SOCKTYPE */
"System error returned in errno", /* EAI_SYSTEM */
"Invalid value for hints", /* EAI_BADHINTS */
"Resolved protocol is unknown", /* EAI_PROTOCOL */
"Argument buffer overflow" /* EAI_OVERFLOW */
};
#if defined(NLS)
static char gai_buf[NL_TEXTMAX];
static once_t gai_init_once = ONCE_INITIALIZER;
static thread_key_t gai_key;
static int gai_keycreated = 0;
static void
gai_keycreate(void)
{
gai_keycreated = (thr_keycreate(&gai_key, free) == 0);
}
#endif
const char *
gai_strerror(int ecode)
{
#if defined(NLS)
nl_catd catd;
char *buf;
if (thr_main() != 0)
buf = gai_buf;
else {
if (thr_once(&gai_init_once, gai_keycreate) != 0 ||
!gai_keycreated)
goto thr_err;
if ((buf = thr_getspecific(gai_key)) == NULL) {
if ((buf = malloc(sizeof(gai_buf))) == NULL)
goto thr_err;
if (thr_setspecific(gai_key, buf) != 0) {
free(buf);
goto thr_err;
}
}
}
catd = catopen("libc", NL_CAT_LOCALE);
if (ecode > 0 && ecode < EAI_MAX)
strlcpy(buf, catgets(catd, 3, ecode, ai_errlist[ecode]),
sizeof(gai_buf));
else if (ecode == 0)
strlcpy(buf, catgets(catd, 3, NL_MSGMAX - 1, "Success"),
sizeof(gai_buf));
else
strlcpy(buf, catgets(catd, 3, NL_MSGMAX, "Unknown error"),
sizeof(gai_buf));
catclose(catd);
return buf;
thr_err:
#endif
if (ecode >= 0 && ecode < EAI_MAX)
return ai_errlist[ecode];
return "Unknown error";
}
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