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 <rpc/rpc.h>
  42 #include "un-namespace.h"
  43
  44 #include "rpc_com.h"
  45
  46 static char *default_domain = NULL;
  47
  48 static char *
  49 get_default_domain(void)
  50 {
  51         char temp[256];
  52
  53         if (default_domain)
  54                 return (default_domain);
  55         if (getdomainname(temp, sizeof(temp)) < 0)
  56                 return (0);
  57         if ((int) strlen(temp) > 0) {
  58                 default_domain = (char *)malloc((strlen(temp)+(unsigned)1));
  59                 if (default_domain == NULL)
  60                         return (0);
  61                 strcpy(default_domain, temp);
  62                 return (default_domain);
  63         }
  64         return (0);
  65 }
  66
  67 /*
  68  * This is a wrapper for the getdomainname function which returns a
  69  * ypclnt.h error code in the failure case.  It also checks to see that
  70  * the domain name is non-null, knowing that the null string is going to
  71  * get rejected elsewhere in the NIS client package.
  72  */
  73 int
  74 __rpc_get_default_domain(char **domain)
  75 {
  76         if ((*domain = get_default_domain()) != NULL)
  77                 return (0);
  78         return (-1);
  79 }