File: tst-_res1.c

package info (click to toggle)
glibc 2.28-8
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 271,788 kB
  • sloc: ansic: 1,008,637; asm: 259,607; makefile: 11,271; sh: 10,477; python: 6,910; cpp: 4,992; perl: 2,258; awk: 2,005; yacc: 290; pascal: 182; sed: 73
file content (68 lines) | stat: -rw-r--r-- 1,713 bytes parent folder | download | duplicates (33)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
/* Copyright (C) 2003-2013 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);
}