1 /*
2 * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2015-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <assert.h>
30 #include <stdlib.h>
31 #include <unistd.h>
32 #include <signal.h>
33
handle_signal(int no)34 static void handle_signal(int no)
35 {
36 _exit(128 + no);
37 }
38
39 int
main(void)40 main(void)
41 {
42 struct sigaction sa, sa0;
43
44 sa.sa_handler = SIG_IGN;
45 sigemptyset(&sa.sa_mask);
46 sigaddset(&sa.sa_mask, SIGHUP);
47 sigaddset(&sa.sa_mask, SIGINT);
48 sa.sa_flags = SA_RESTART;
49 assert(!sigaction(SIGUSR2, &sa, &sa0));
50
51 sa.sa_handler = handle_signal;
52 sigemptyset(&sa.sa_mask);
53 sigaddset(&sa.sa_mask, SIGQUIT);
54 sigaddset(&sa.sa_mask, SIGTERM);
55 sa.sa_flags = SA_SIGINFO;
56 assert(!sigaction(SIGUSR2, &sa, &sa0));
57
58 sa.sa_handler = SIG_DFL;
59 sigemptyset(&sa.sa_mask);
60 sa.sa_flags = 0;
61 assert(!sigaction(SIGUSR2, &sa, &sa0));
62
63 sigfillset(&sa.sa_mask);
64 sigdelset(&sa.sa_mask, SIGHUP);
65 assert(!sigaction(SIGUSR2, &sa, &sa0));
66
67 return 0;
68 }
69