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 * 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 86 __rpc_get_default_domain(char **domain) 87 { 88 if ((*domain = get_default_domain()) != 0) 89 return (0); 90 return (-1); 91 } 92