1 /* 2 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. 3 * Created by: salwan.searty 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 if the signal specified by set does not become pending, 9 and the timespec structure pointed to by timeout is zero-valued, 10 the sigtimedwait() function shall return immediately with an error. 11 12 NOTE: This program has commented out areas. The commented out functionality 13 sets a timer in case sigtimedwait() never returns, to help the program 14 from hanging. To make this program 15 runnable on a typical system, I've commented out the timer functionality 16 by default. However, if you do have a timers implementation on your 17 system, then it is recommened that you uncomment the timers-related lines 18 of code in this program. 19 20 Steps: 21 1. Register signal TIMERSIGNAL with the handler myhandler 22 (2.)Create and set a timer that expires in TIMERSEC seconds incase sigtimedwait() 23 never returns. 24 3. Obtain time1. 25 4. Call sigtimedwait() to wait for non-pending signal SIGTOTEST for SIGTIMEDWAITSEC 26 seconds. 27 5. Obtain time2, and find the difference between time2 and time1. 28 6. Verify that (time2-time1) is equal to SIGTIMEDWAITSEC within a reasonable 29 error margin. 30 */ 31 32 #define _XOPEN_SOURCE 600 33 #define _XOPEN_REALTIME 1 34 35 #define TIMERSIGNAL SIGUSR1 36 #define SIGTOTEST SIGUSR2 37 #define TIMERSEC 2 38 #define SIGTIMEDWAITSEC 0 39 #define ERRORMARGIN 0.1 40 41 #include <signal.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <time.h> 45 #include <unistd.h> 46 #include <sys/time.h> 47 #include <sys/wait.h> 48 #include "posixtest.h" 49 50 void myhandler(int signo) 51 { 52 printf 53 ("Test FAILED: %d seconds have elapsed and sigtimedwait() has not yet returned.\n", 54 TIMERSEC); 55 exit(PTS_FAIL); 56 } 57 58 int main(void) 59 { 60 struct sigaction act; 61 62 struct timeval time1, time2; 63 double time_elapsed; 64 65 sigset_t selectset; 66 struct timespec ts; 67 /* 68 struct sigevent ev; 69 timer_t tid; 70 struct itimerspec its; 71 72 its.it_interval.tv_sec = 0; 73 its.it_interval.tv_nsec = 0; 74 its.it_value.tv_sec = TIMERSEC; 75 its.it_value.tv_nsec = 0; 76 77 ev.sigev_notify = SIGEV_SIGNAL; 78 ev.sigev_signo = TIMERSIGNAL; 79 */ 80 act.sa_flags = 0; 81 act.sa_handler = myhandler; 82 sigemptyset(&act.sa_mask); 83 sigaction(TIMERSIGNAL, &act, 0); 84 85 sigemptyset(&selectset); 86 sigaddset(&selectset, SIGTOTEST); 87 88 ts.tv_sec = SIGTIMEDWAITSEC; 89 ts.tv_nsec = 0; 90 /* 91 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { 92 perror("timer_create() did not return success\n"); 93 return PTS_UNRESOLVED; 94 } 95 96 if (timer_settime(tid, 0, &its, NULL) != 0) { 97 perror("timer_settime() did not return success\n"); 98 return PTS_UNRESOLVED; 99 } 100 */ 101 if (gettimeofday(&time1, NULL) == -1) { 102 perror("gettimeofday()"); 103 return PTS_UNRESOLVED; 104 } 105 if (sigtimedwait(&selectset, NULL, &ts) != -1) { 106 printf 107 ("Test FAILED: sigtimedwait() did not return with an error\n"); 108 return PTS_FAIL; 109 } 110 if (gettimeofday(&time2, NULL) == -1) { 111 perror("gettimeofday()"); 112 return PTS_UNRESOLVED; 113 } 114 115 time_elapsed = (time2.tv_sec - time1.tv_sec 116 + (time2.tv_usec - time1.tv_usec) / 1000000.0); 117 118 if ((time_elapsed > SIGTIMEDWAITSEC + ERRORMARGIN) 119 || (time_elapsed < SIGTIMEDWAITSEC - ERRORMARGIN)) { 120 printf 121 ("Test FAILED: sigtimedwait() did not return immediately\n"); 122 return PTS_FAIL; 123 } 124 125 printf("Test PASSED\n"); 126 return PTS_PASS; 127 } 128
