/* Copyright (C) 2003-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.

   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/>.  */

/* Test whether _res in glibc 2.1.x and earlier (before __res_state()

   was introduced) works.  Portable programs should never do the

   dirty things below.  */

#include <pthread.h>

#include <resolv.h>

#include <stdlib.h>

#include <stdio.h>

void *tf (void *resp)

{

  if (resp == &_res || resp == __res_state ())

    abort ();

  _res.retry = 24;

  return NULL;

}

void do_test (struct __res_state *resp)

{

  if (resp != &_res || resp != __res_state ())

    abort ();

  if (_res.retry != 12)

    abort ();

}

int main (void)

{

#undef _res

  extern struct __res_state _res;

  pthread_t th;

  _res.retry = 12;

  if (pthread_create (&th, NULL, tf, &_res) != 0)

    {

      puts ("create failed");

      exit (1);

    }

  do_test (&_res);

  if (pthread_join (th, NULL) != 0)

    {

      puts ("join failed");

      exit (1);

    }

  do_test (&_res);

  exit (0);

}