• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
handle_signal(int no)33 static void handle_signal(int no)
34 {
35 	_exit(128 + no);
36 }
37 
38 int
main(void)39 main(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