1 /* 2 3 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. 4 * Created by: rusty.lynch REMOVE-THIS AT intel DOT com 5 * This file is licensed under the GPL license. For the full content 6 * of this license, see the COPYING file at the top level of this 7 * source tree. 8 9 Test case for assertion #3 of the sigaction system call that shows 10 calling sigaction with a null act argument does not change the 11 signal handler. 12 13 Steps: 14 1. Initialize global variable to indicate handler has not been called 15 2. Set the signal handler for SIGVTALRM to handler 16 3. Call sigaction with a null act 17 4. raise SIGVTALRM 18 5. Verify handler was called. 19 */ 20 21 #include <signal.h> 22 #include <stdio.h> 23 #include "posixtest.h" 24 25 static volatile int handler_called; 26 handler(int signo LTP_ATTRIBUTE_UNUSED)27void handler(int signo LTP_ATTRIBUTE_UNUSED) 28 { 29 handler_called = 1; 30 } 31 main(void)32int main(void) 33 { 34 struct sigaction act; 35 struct sigaction oact; 36 37 act.sa_handler = handler; 38 act.sa_flags = 0; 39 sigemptyset(&act.sa_mask); 40 if (sigaction(SIGVTALRM, &act, 0) == -1) { 41 perror("Unexpected error while attempting to setup test " 42 "pre-conditions"); 43 return PTS_UNRESOLVED; 44 } 45 46 if (sigaction(SIGVTALRM, 0, &oact) == -1) { 47 perror("Unexpected error while attempting to setup test " 48 "pre-conditions"); 49 return PTS_UNRESOLVED; 50 } 51 52 if (raise(SIGVTALRM) == -1) { 53 perror("Unexpected error while attempting to setup test " 54 "pre-conditions"); 55 return PTS_UNRESOLVED; 56 } 57 58 if (handler_called) { 59 printf("Test PASSED\n"); 60 return PTS_PASS; 61 } 62 63 printf("Test FAILED\n"); 64 return PTS_FAIL; 65 } 66