1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2017 Li-Wen Hsu <lwhsu@FreeBSD.org>
24  */
25 
26 #include <signal.h>
27 #include <stdio.h>
28 #include <unistd.h>
29 
30 int
31 main(void)
32 {
33 
34     sigset_t set;
35     siginfo_t info;
36     struct timespec timeout;
37 
38     (void)sigemptyset(&set);
39     (void)sigaddset(&set, SIGHUP);
40     timeout.tv_sec = 1;
41     timeout.tv_nsec = 0;
42 
43     for (;;)
44         (void)sigtimedwait(&set, &info, &timeout);
45 
46     return (0);
47 }
48