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