1 | /* Copyright (C) 2003-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
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 |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <error.h> |
20 | #include <signal.h> |
21 | #include <stdlib.h> |
22 | #include <stdio.h> |
23 | |
24 | volatile int count; |
25 | |
26 | void |
27 | sh (int sig) |
28 | { |
29 | ++count; |
30 | } |
31 | |
32 | int |
33 | main (void) |
34 | { |
35 | struct sigaction sa; |
36 | sa.sa_handler = sh; |
37 | sigemptyset (&sa.sa_mask); |
38 | sa.sa_flags = 0; |
39 | if (sigaction (SIGUSR1, act: &sa, NULL) < 0) |
40 | { |
41 | printf (format: "sigaction failed: %m\n" ); |
42 | exit (1); |
43 | } |
44 | if (raise (SIGUSR1) < 0) |
45 | { |
46 | printf (format: "first raise failed: %m\n" ); |
47 | exit (1); |
48 | } |
49 | if (raise (SIGUSR1) < 0) |
50 | { |
51 | printf (format: "second raise failed: %m\n" ); |
52 | exit (1); |
53 | } |
54 | if (count != 2) |
55 | { |
56 | printf (format: "signal handler not called 2 times\n" ); |
57 | exit (1); |
58 | } |
59 | exit (0); |
60 | } |
61 | |