lib/libc/rpc/rpcdname.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)rpcdname.c 1.7 91/03/11 Copyr 1989 Sun Micro
  29  * $FreeBSD: src/lib/libc/rpc/rpcdname.c,v 1.5 2004/10/16 06:11:35 obrien Exp $
  30  */
  31
  32 /*
  33  * rpcdname.c
  34  * Gets the default domain name
  35  */
  36
  37 #include "namespace.h"
  38 #include <stdlib.h>
  39 #include <unistd.h>
  40 #include <string.h>
  41 #include "un-namespace.h"
  42
  43 static char *default_domain = NULL;
  44
  45 static char *
  46 get_default_domain(void)
  47 {
  48         char temp[256];
  49
  50         if (default_domain)
  51                 return (default_domain);
  52         if (getdomainname(temp, sizeof(temp)) < 0)
  53                 return (0);
  54         if ((int) strlen(temp) > 0) {
  55                 default_domain = (char *)malloc((strlen(temp)+(unsigned)1));
  56                 if (default_domain == NULL)
  57                         return (0);
  58                 strcpy(default_domain, temp);
  59                 return (default_domain);
  60         }
  61         return (0);
  62 }
  63
  64 /*
  65  * This is a wrapper for the system call getdomainname which returns a
  66  * ypclnt.h error code in the failure case.  It also checks to see that
  67  * the domain name is non-null, knowing that the null string is going to
  68  * get rejected elsewhere in the NIS client package.
  69  */
  70 int
  71 __rpc_get_default_domain(char **domain)
  72 {
  73         if ((*domain = get_default_domain()) != NULL)
  74                 return (0);
  75         return (-1);
  76 }