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
38 int
main(int argc,char ** argv)39 main(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