/* Copyright (C) 2003-2015 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); }