1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Created by: julie.n.fleischer REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 * 8 * Test that only a single timer expiration signal can be sent to 9 * the process at a time. 10 * 11 * - Block signal SIGTOTEST. 12 * - Set up a repeating timer to expire with signal SIGTOTEST. 13 * - Sleep for enough time for > 2 signals to be sent. 14 * - After the signals are unblocked, ensure only one signal is sent. 15 */ 16 17 #include <signal.h> 18 #include <time.h> 19 #include <unistd.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include "posixtest.h" 23 24 #define SIGTOTEST SIGALRM 25 #define TIMERVAL 2 26 #define TIMERINTERVAL 3 27 28 int madeit = 0; 29 30 void handler(int signo) 31 { 32 madeit++; 33 if (madeit > 1) { 34 printf(">1 signal made it through\n"); 35 exit(PTS_FAIL); 36 } 37 } 38 39 int main(void) 40 { 41 struct sigevent ev; 42 struct sigaction act; 43 timer_t tid; 44 struct itimerspec its; 45 int overruns; 46 sigset_t set; 47 48 ev.sigev_notify = SIGEV_SIGNAL; 49 ev.sigev_signo = SIGTOTEST; 50 51 act.sa_handler = handler; 52 act.sa_flags = 0; 53 54 /* 55 * set up handler for SIGTOTEST 56 */ 57 if (sigemptyset(&act.sa_mask) != 0) { 58 perror("sigemptyset() did not return success\n"); 59 return PTS_UNRESOLVED; 60 } 61 if (sigaction(SIGTOTEST, &act, 0) != 0) { 62 perror("sigaction() did not return success\n"); 63 return PTS_UNRESOLVED; 64 } 65 66 /* 67 * set up timer to send SIGTOTEST 68 */ 69 70 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { 71 perror("timer_create() did not return success\n"); 72 return PTS_UNRESOLVED; 73 } 74 its.it_interval.tv_sec = TIMERINTERVAL; 75 its.it_interval.tv_nsec = 0; 76 its.it_value.tv_sec = TIMERVAL; 77 its.it_value.tv_nsec = 0; 78 79 if (timer_settime(tid, 0, &its, NULL) != 0) { 80 perror("timer_settime() did not return success\n"); 81 return PTS_UNRESOLVED; 82 } 83 84 /* 85 * block signal SIGTOTEST 86 */ 87 if (sigemptyset(&set) != 0) { 88 perror("sigemptyset() did not return success\n"); 89 return PTS_UNRESOLVED; 90 } 91 if (sigaddset(&set, SIGTOTEST) != 0) { 92 perror("sigaddset() did not return success\n"); 93 return PTS_UNRESOLVED; 94 } 95 if (sigprocmask(SIG_SETMASK, &set, NULL) != 0) { 96 perror("sigprocmask() did not return success\n"); 97 return PTS_UNRESOLVED; 98 } 99 100 if (sleep(2 * TIMERINTERVAL + TIMERVAL) != 0) { 101 perror("Could not sleep for correct amount of time\n"); 102 return PTS_UNRESOLVED; 103 } 104 105 if (sigprocmask(SIG_UNBLOCK, &set, NULL) != 0) { 106 perror("sigprocmask() did not return success\n"); 107 return PTS_UNRESOLVED; 108 } 109 110 overruns = timer_getoverrun(tid); 111 printf("Total overruns: %d\n", overruns); 112 if (madeit == 1) { 113 printf("Test PASSED\n"); 114 return PTS_PASS; 115 } 116 117 printf("FAIL: %d signals sent\n", madeit); 118 return PTS_FAIL; 119 } 120
