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 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