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2b778ceb | 1 | /* Copyright (C) 2003-2021 Free Software Foundation, Inc. |
0e9d6240 | 2 | This file is part of the GNU C Library. |
0e9d6240 UD |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the 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 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
0e9d6240 UD |
17 | |
18 | /* Test whether _res in glibc 2.1.x and earlier (before __res_state() | |
19 | was introduced) works. Portable programs should never do the | |
20 | dirty things below. */ | |
21 | ||
22 | #include <pthread.h> | |
23 | #include <resolv.h> | |
24 | #include <stdlib.h> | |
25 | #include <stdio.h> | |
26 | ||
27 | void *tf (void *resp) | |
28 | { | |
29 | if (resp == &_res || resp == __res_state ()) | |
30 | abort (); | |
31 | _res.retry = 24; | |
32 | return NULL; | |
33 | } | |
34 | ||
35 | void do_test (struct __res_state *resp) | |
36 | { | |
37 | if (resp != &_res || resp != __res_state ()) | |
38 | abort (); | |
39 | if (_res.retry != 12) | |
40 | abort (); | |
41 | } | |
42 | ||
43 | int main (void) | |
44 | { | |
45 | #undef _res | |
46 | extern struct __res_state _res; | |
47 | pthread_t th; | |
48 | ||
49 | _res.retry = 12; | |
50 | if (pthread_create (&th, NULL, tf, &_res) != 0) | |
51 | { | |
52 | puts ("create failed"); | |
53 | exit (1); | |
54 | } | |
55 | ||
56 | do_test (&_res); | |
57 | ||
58 | if (pthread_join (th, NULL) != 0) | |
59 | { | |
60 | puts ("join failed"); | |
61 | exit (1); | |
62 | } | |
63 | ||
64 | do_test (&_res); | |
65 | ||
66 | exit (0); | |
67 | } |