1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 * Copyright (C) 2017 Cyril Hrubis <chrubis@suse.cz>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Test Description:
22 * Check the functionality of the Alarm system call when the time input
23 * parameter is zero.
24 *
25 * Expected Result:
26 * The previously specified alarm request should be cancelled and the
27 * SIGALRM should not be received.
28 *
29 * HISTORY
30 * 07/2001 Ported by Wayne Boyer
31 */
32
33 #include <stdio.h>
34 #include <unistd.h>
35 #include <sys/types.h>
36 #include <errno.h>
37 #include <string.h>
38 #include <signal.h>
39
40 #include "tst_test.h"
41
42 static volatile int alarms_received = 0;
43
sigproc(int sig)44 static void sigproc(int sig)
45 {
46 if (sig == SIGALRM)
47 alarms_received++;
48 }
49
setup(void)50 static void setup(void)
51 {
52 SAFE_SIGNAL(SIGALRM, sigproc);
53 }
54
verify_alarm(void)55 static void verify_alarm(void)
56 {
57 int ret;
58
59 alarm(2);
60 sleep(1);
61
62 ret = alarm(0);
63
64 /* Wait for signal SIGALRM */
65 sleep(2);
66
67 if (alarms_received)
68 tst_res(TFAIL, "Received %i alarms", alarms_received);
69 else
70 tst_res(TPASS, "Received 0 alarms");
71
72 if (ret == 1)
73 tst_res(TPASS, "alarm(0) returned 1");
74 else
75 tst_res(TFAIL, "alarm(0) returned %i, expected 1", ret);
76 }
77
78 static struct tst_test test = {
79 .tid = "alarm06",
80 .setup = setup,
81 .test_all = verify_alarm,
82 };
83