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 sigtimedwait() returns -1 upon unsuccessful completion. 9 10 NOTE: This program has commented out areas. The commented out functionality 11 sets a timer in case sigtimedwait() never returns, to help the program 12 from hanging. To make this program 13 runnable on a typical system, I've commented out the timer functionality 14 by default. However, if you do have a timers implementation on your 15 system, then it is recommened that you uncomment the timers-related lines 16 of code in this program. 17 18 Steps: 19 1. Register signal TIMERSIGNAL with the handler myhandler 20 (2.)Create and set a timer that expires in TIMERSEC seconds incase sigtimedwait() 21 never returns. 22 3. Call sigtimedwait() to wait for non-pending signal SIGTOTEST for SIGTIMEDWAITSEC 23 seconds. 24 4. Verify that sigtimedwait() returns a -1. 25 */ 26 27 #define _XOPEN_SOURCE 600 28 #define _XOPEN_REALTIME 1 29 30 #define TIMERSIGNAL SIGUSR1 31 #define SIGTOTEST SIGUSR2 32 #define TIMERSEC 2 33 #define SIGTIMEDWAITSEC 0 34 35 #include <signal.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <time.h> 39 #include <unistd.h> 40 #include <sys/wait.h> 41 #include "posixtest.h" 42 43 void myhandler(int signo) 44 { 45 printf 46 ("Test FAILED: %d seconds have elapsed and sigtimedwait() has not yet returned.\n", 47 TIMERSEC); 48 exit(PTS_FAIL); 49 } 50 51 int main(void) 52 { 53 struct sigaction act; 54 55 sigset_t selectset; 56 struct timespec ts; 57 /* 58 struct sigevent ev; 59 timer_t tid; 60 struct itimerspec its; 61 62 its.it_interval.tv_sec = 0; 63 its.it_interval.tv_nsec = 0; 64 its.it_value.tv_sec = TIMERSEC; 65 its.it_value.tv_nsec = 0; 66 67 ev.sigev_notify = SIGEV_SIGNAL; 68 ev.sigev_signo = TIMERSIGNAL; 69 */ 70 act.sa_flags = 0; 71 act.sa_handler = myhandler; 72 sigemptyset(&act.sa_mask); 73 sigaction(TIMERSIGNAL, &act, 0); 74 75 sigemptyset(&selectset); 76 sigaddset(&selectset, SIGTOTEST); 77 78 ts.tv_sec = SIGTIMEDWAITSEC; 79 ts.tv_nsec = 0; 80 /* 81 if (timer_create(CLOCK_REALTIME, &ev, &tid) != 0) { 82 perror("timer_create() did not return success\n"); 83 return PTS_UNRESOLVED; 84 } 85 86 if (timer_settime(tid, 0, &its, NULL) != 0) { 87 perror("timer_settime() did not return success\n"); 88 return PTS_UNRESOLVED; 89 } 90 */ 91 if (sigtimedwait(&selectset, NULL, &ts) != -1) { 92 printf 93 ("Test FAILED: sigtimedwait() did not return with an error\n"); 94 return PTS_FAIL; 95 } 96 97 printf("Test PASSED\n"); 98 return PTS_PASS; 99 } 100
