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 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <signal.h>
30#include <time.h>
31#include <stdlib.h>
32#include <stdio.h>
33#include <errno.h>
34#include <string.h>
35
36#define NANOSEC	1000000000
37
38int
39main(int argc, char **argv)
40{
41	struct sigevent ev;
42	struct itimerspec ts;
43	sigset_t set;
44	timer_t tid;
45	char *cmd = argv[0];
46	int sig;
47
48	ev.sigev_notify = SIGEV_SIGNAL;
49	ev.sigev_signo = SIGUSR1;
50
51	if (timer_create(CLOCK_REALTIME, &ev, &tid) == -1) {
52		(void) fprintf(stderr, "%s: cannot create CLOCK_HIGHRES "
53		    "timer: %s\n", cmd, strerror(errno));
54		exit(EXIT_FAILURE);
55	}
56
57	(void) sigemptyset(&set);
58	(void) sigaddset(&set, SIGUSR1);
59	(void) sigprocmask(SIG_BLOCK, &set, NULL);
60
61	ts.it_value.tv_sec = 1;
62	ts.it_value.tv_nsec = 0;
63	ts.it_interval.tv_sec = 0;
64	ts.it_interval.tv_nsec = NANOSEC / 2;
65
66	if (timer_settime(tid, TIMER_RELTIME, &ts, NULL) == -1) {
67		(void) fprintf(stderr, "%s: timer_settime() failed: %s\n",
68		    cmd, strerror(errno));
69		exit(EXIT_FAILURE);
70	}
71
72	do {
73		(void) sigwait(&set, &sig);
74	} while(sig != SIGUSR1);
75
76	/*NOTREACHED*/
77	return (0);
78}
79