1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29 /*
30 * Portions of this source code were derived from Berkeley
31 * 4.3 BSD under license from the Regents of the University of
32 * California.
33 */
34
35 /*
36 * rpcdname.c
37 * Gets the default domain name
38 */
39 #include "mt.h"
40 #include "rpc_mt.h"
41 #include <sys/types.h>
42 #include <sys/time.h>
43 #include <string.h>
44 #include <syslog.h>
45
46 extern int getdomainname();
47 extern char *strdup();
48 static char *default_domain = 0;
49
50 static char *
get_default_domain(void)51 get_default_domain(void)
52 {
53 char temp[256];
54 extern mutex_t dname_lock;
55
56 /* VARIABLES PROTECTED BY dname_lock: default_domain */
57
58 (void) mutex_lock(&dname_lock);
59 if (default_domain) {
60 (void) mutex_unlock(&dname_lock);
61 return (default_domain);
62 }
63 if (getdomainname(temp, (size_t)sizeof (temp)) < 0) {
64 (void) mutex_unlock(&dname_lock);
65 return (0);
66 }
67 if ((int)strlen(temp) > 0) {
68 default_domain = strdup(temp);
69 if (default_domain == NULL) {
70 syslog(LOG_ERR, "get_default_domain : strdup failed.");
71 (void) mutex_unlock(&dname_lock);
72 return (0);
73 }
74 }
75 (void) mutex_unlock(&dname_lock);
76 return (default_domain);
77 }
78
79 /*
80 * This is a wrapper for the system call getdomainname which returns a
81 * ypclnt.h error code in the failure case. It also checks to see that
82 * the domain name is non-null, knowing that the null string is going to
83 * get rejected elsewhere in the yp client package.
84 */
85 int
__rpc_get_default_domain(char ** domain)86 __rpc_get_default_domain(char **domain)
87 {
88 if ((*domain = get_default_domain()) != 0)
89 return (0);
90 return (-1);
91 }
92