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 2006 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 void 37 main(int argc, 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 45 ev.sigev_notify = SIGEV_SIGNAL; 46 ev.sigev_signo = SIGUSR1; 47 48 if (timer_create(CLOCK_REALTIME, &ev, &tid) == -1) { 49 (void) fprintf(stderr, "%s: cannot create CLOCK_HIGHRES " 50 "timer: %s\n", cmd, strerror(errno)); 51 exit(EXIT_FAILURE); 52 } 53 54 (void) sigemptyset(&set); 55 (void) sigaddset(&set, SIGUSR1); 56 (void) sigprocmask(SIG_BLOCK, &set, NULL); 57 58 ts.it_value.tv_sec = 1; 59 ts.it_value.tv_nsec = 0; 60 ts.it_interval.tv_sec = 0; 61 ts.it_interval.tv_nsec = NANOSEC / 2; 62 63 if (timer_settime(tid, TIMER_RELTIME, &ts, NULL) == -1) { 64 (void) fprintf(stderr, "%s: timer_settime() failed: %s\n", 65 cmd, strerror(errno)); 66 exit(EXIT_FAILURE); 67 } 68 69 for (;;) { 70 (void) sigwait(&set); 71 } 72 } 73