/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <dlfcn.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int

main (void)

{

  void *h;

  const char *s;

  /* Test that dlerror works initially.  */

  s = dlerror ();

  printf ("dlerror() without prior dl*() call returned: %s\n", s);

  if (s != NULL)

    return 1;

  h = dlopen ("errmsg1mod.so", RTLD_NOW);

  if (h != NULL)

    {

      dlclose (h);

      puts ("errmsg1mod.so could be loaded !?");

      exit (1);

    }

  s = dlerror ();

  puts (s);

  return strstr (s, "errmsg1mod.so") == NULL;

}