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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 /*
  28  * derive_domain_dl.c
  29  *    This program uses dlopen() to load libmapid library and
  30  *    call mapid_derive_domain() to get mapid domain.
  31  *
  32  * Return value:
  33  *    On success, outputs domain value and returns 0;
  34  *    on error, returns 1.
  35  *
  36  * Usage:
  37  *    ./derive_domain_dl
  38  */
  39 
  40 #include <stdio.h>
  41 #include <dlfcn.h>
  42 #include <link.h>
  43 #include <nfs/mapid.h>
  44 
  45 #define LIB     "/usr/lib/nfs/libmapid.so"
  46 typedef char *(*DeriveDomain)(void);
  47 
  48 int
  49 main(int argc, char **argv)
  50 {
  51         void * dlh;
  52         DeriveDomain derive_domain;
  53 
  54         dlh = dlopen(LIB, RTLD_LAZY);
  55         if (dlh == (void *)0) {
  56                 fprintf(stderr, LIB" not found\n%s\n", dlerror());
  57                 exit(1);
  58         }
  59 
  60         derive_domain = (DeriveDomain)dlsym(dlh, "mapid_derive_domain");
  61         if (derive_domain == (DeriveDomain)0) {
  62                 fprintf(stderr, "mapid_derive_domain() not found\n");
  63                 perror("dlsym");
  64                 exit(1);
  65         }
  66 
  67         printf("%s\n", derive_domain());
  68 
  69         exit(0);
  70 }