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