1/*
2* Copyright (c) 2005, Bull S.A..  All rights reserved.
3* Created by: Sebastien Decugis
4* Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
5*
6* This program is free software; you can redistribute it and/or modify it
7* under the terms of version 2 of the GNU General Public License as
8* published by the Free Software Foundation.
9*
10* This program is distributed in the hope that it would be useful, but
11* WITHOUT ANY WARRANTY; without even the implied warranty of
12* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13*
14* You should have received a copy of the GNU General Public License along
15* with this program; if not, write the Free Software Foundation, Inc.,
16* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17*
18* This sample test aims to check the following assertions:
19*
20* If the signal action was set with the signal() function, getting it into oact
21* then reinstalling it with act must be valid.
22*
23* The steps are:
24* -> register a signal handler for SIGXFSZ with signal().
25* -> check this signal handler works.
26* -> change the signal handler with sigaction, saving old handler in oact.
27* -> check the new signal handler works.
28* -> set the old signal handler back
29* -> check the old signal handler still works.
30*
31* The test fails if a signal handler does not work as expected.
32*/
33
34/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
35#define _POSIX_C_SOURCE 200112L
36
37#include <stdarg.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42#include <signal.h>
43#include <errno.h>
44
45#include "posixtest.h"
46
47static volatile sig_atomic_t called = 1;
48
49static void handler_1()
50{
51	called++;
52}
53
54static void handler_2()
55{
56	called--;
57}
58
59int main(void)
60{
61	int ret;
62
63	struct sigaction sa, save;
64
65	if (signal(SIGXFSZ, handler_1) == SIG_ERR) {
66		perror("Failed to register signal handler");
67		return PTS_UNRESOLVED;
68	}
69
70	/* As whether signal handler is restored to default when executed
71	is implementation defined, we cannot check it was registered here. */
72
73	/* Set the new signal handler with sigaction*/
74	sa.sa_flags = 0;
75
76	sa.sa_handler = handler_2;
77
78	ret = sigemptyset(&sa.sa_mask);
79
80	if (ret != 0) {
81		perror("Failed to empty signal set");
82		return PTS_UNRESOLVED;
83	}
84
85	ret = sigaction(SIGXFSZ, &sa, &save);
86
87	if (ret != 0) {
88		perror("Failed to register signal handler");
89		return PTS_UNRESOLVED;
90	}
91
92	/* Check the signal handler has been set up */
93	ret = raise(SIGXFSZ);
94
95	if (ret != 0) {
96		perror("Failed to raise signal");
97		return PTS_UNRESOLVED;
98	}
99
100	if (called != 0) {
101		fprintf(stderr, "Handler was not executed\n");
102		return PTS_FAIL;
103	}
104
105	/* Restore the first signal handler */
106	ret = sigaction(SIGXFSZ, &save, 0);
107
108	if (ret != 0) {
109		perror("Failed to restore signal handler");
110		return PTS_UNRESOLVED;
111	}
112
113	/* Check the signal handler has been set up */
114	ret = raise(SIGXFSZ);
115
116	if (ret != 0) {
117		perror("Failed to raise signal");
118		return PTS_UNRESOLVED;
119	}
120
121	if (called != 1) {
122		fprintf(stderr, "Handler was not executed\n");
123		return PTS_FAIL;
124	}
125
126	printf("Test PASSED\n");
127	return PTS_PASS;
128}
129