dlfcn/tstatexit.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <dlfcn.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23
  24 int
  25 main (void)
  26 {
  27   const char fname[] = "modatexit.so";
  28   void *h;
  29   void (*fp) (void *);
  30   int v = 0;
  31
  32   h = dlopen (fname, RTLD_NOW);
  33   if (h == NULL)
  34     {
  35       printf ("cannot open \"%s\": %s\n", fname, dlerror ());
  36       exit (1);
  37     }
  38
  39   fp = dlsym (h, "foo");
  40   if (fp == NULL)
  41     {
  42       printf ("cannot find \"foo\": %s\n", dlerror ());
  43       exit (1);
  44     }
  45
  46   fp (&v);
  47
  48   if (dlclose (h) != 0)
  49     {
  50       printf ("cannot close \"%s\": %s\n", fname, dlerror ());
  51       exit (1);
  52     }
  53
  54   if (v != 1)
  55     {
  56       puts ("module unload didn't change `v'");
  57       exit (1);
  58     }
  59
  60   puts ("finishing now");
  61
  62   return 0;
  63 }