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
34static void handle_signal(int no)
35{
36	_exit(128 + no);
37}
38
39int
40main(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