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