rpcdname.c revision 61961e0f20c7637a3846bb39786bb9dffa91dfb9
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley
* 4.3 BSD under license from the Regents of the University of
* California.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* rpcdname.c
* Gets the default domain name
*/
#include "mt.h"
#include "rpc_mt.h"
#include <sys/types.h>
#include <sys/time.h>
#include <string.h>
#include <syslog.h>
extern int getdomainname();
extern char *strdup();
static char *default_domain = 0;
static char *
get_default_domain(void)
{
char temp[256];
extern mutex_t dname_lock;
/* VARIABLES PROTECTED BY dname_lock: default_domain */
(void) mutex_lock(&dname_lock);
if (default_domain) {
(void) mutex_unlock(&dname_lock);
return (default_domain);
}
if (getdomainname(temp, (size_t)sizeof (temp)) < 0) {
(void) mutex_unlock(&dname_lock);
return (0);
}
if ((int)strlen(temp) > 0) {
default_domain = strdup(temp);
if (default_domain == NULL) {
syslog(LOG_ERR, "get_default_domain : strdup failed.");
(void) mutex_unlock(&dname_lock);
return (0);
}
}
(void) mutex_unlock(&dname_lock);
return (default_domain);
}
/*
* This is a wrapper for the system call getdomainname which returns a
* ypclnt.h error code in the failure case. It also checks to see that
* the domain name is non-null, knowing that the null string is going to
* get rejected elsewhere in the yp client package.
*/
int
__rpc_get_default_domain(char **domain)
{
if ((*domain = get_default_domain()) != 0)
return (0);
return (-1);
}