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 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