1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/*
2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2014-2015 Dmitry V. Levin <ldv@altlinux.org>
3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved.
4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *
5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without
6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions
7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met:
8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright
9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *    notice, this list of conditions and the following disclaimer.
10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright
11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *    notice, this list of conditions and the following disclaimer in the
12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *    documentation and/or other materials provided with the distribution.
13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products
14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *    derived from this software without specific prior written permission.
15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes *
16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */
27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <assert.h>
29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <stdlib.h>
30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <unistd.h>
31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include <signal.h>
32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesstatic void handle_signal(int no)
34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{
35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	_exit(128 + no);
36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes}
37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint
39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesmain(void)
40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{
41d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	struct sigaction sa, sa0;
42d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
43d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_handler = SIG_IGN;
44d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigemptyset(&sa.sa_mask);
45d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigaddset(&sa.sa_mask, SIGHUP);
46d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigaddset(&sa.sa_mask, SIGINT);
47d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_flags = SA_RESTART;
48d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	assert(!sigaction(SIGUSR2, &sa, &sa0));
49d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
50d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_handler = handle_signal;
51d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigemptyset(&sa.sa_mask);
52d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigaddset(&sa.sa_mask, SIGQUIT);
53d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigaddset(&sa.sa_mask, SIGTERM);
54d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_flags = SA_SIGINFO;
55d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	assert(!sigaction(SIGUSR2, &sa, &sa0));
56d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
57d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_handler = SIG_DFL;
58d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigemptyset(&sa.sa_mask);
59d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sa.sa_flags = 0;
60d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	assert(!sigaction(SIGUSR2, &sa, &sa0));
61d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
62d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigfillset(&sa.sa_mask);
63d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	sigdelset(&sa.sa_mask, SIGHUP);
64d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	assert(!sigaction(SIGUSR2, &sa, &sa0));
65d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes
66d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes	return 0;
67d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes}
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