1 /*
2  * List signal numbers that are valid arguments for sigaction syscall.
3  *
4  * Copyright (c) 2017 Dmitry V. Levin <ldv@altlinux.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include "tests.h"
31 
32 #include <signal.h>
33 #include <stdio.h>
34 
35 int
36 main(void)
37 {
38 	unsigned int i;
39 
40 	for (i = 1; i < 32; ++i) {
41 		static const struct sigaction ign = { .sa_handler = SIG_IGN };
42 		static const struct sigaction dfl = { .sa_handler = SIG_DFL };
43 		struct sigaction act;
44 
45 		if (sigaction(i, &ign, NULL) ||
46 		    sigaction(i, NULL, &act) ||
47 		    ign.sa_handler != act.sa_handler ||
48 		    sigaction(i, &dfl, NULL) ||
49 		    sigaction(i, NULL, &act) ||
50 		    dfl.sa_handler != act.sa_handler)
51 			continue;
52 
53 		printf("%u\n", i);
54 	}
55 
56 	return 0;
57 }
58