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 #22 of the sigaction system call that verifies 10 that if the SA_NODEFER flag is set for a given signal, then when the 11 sa_sigaction signal-catching function is entered, then the signal that 12 was caught is not added to the signal mask by raising that signal in the 13 signal handler and verifying that the handler is reentered. 14 15 Steps: 16 1. Fork a new process 17 2. (parent) wait for child 18 3. (child) Setup a signal handler for SIGQUIT with SA_NODEFER set 19 in the sa_flags field 20 4. (child) raise SIGQUIT 21 5. (child, signal handler) increment handler count 22 6. (child, signal handler) if count is 1 then raise SIGQUIT 23 7. (child, signal handler) if count is 1 then set error variable 24 8. (child) if error is set then return -1, else return 0 25 6. (parent - returning from wait) If child returned 0 then exit 0, 26 otherwise exit -1. 27 */ 28 29 #define _XOPEN_SOURCE 600 30 31 #include <signal.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <sys/wait.h> 35 #include <unistd.h> 36 #include "posixtest.h" 37 38 int handler_count = 0; 39 40 void handler(int signo) 41 { 42 static int inside_handler = 0; 43 44 printf("SIGQUIT caught\n"); 45 if (inside_handler) { 46 printf("Signal caught while inside handler\n"); 47 exit(0); 48 } 49 50 inside_handler++; 51 handler_count++; 52 53 if (handler_count == 1) { 54 printf("Raising SIGQUIT\n"); 55 raise(SIGQUIT); 56 printf("Returning from raising SIGQUIT\n"); 57 } 58 59 inside_handler--; 60 } 61 62 int main(void) 63 { 64 if (fork() == 0) { 65 /* child */ 66 67 struct sigaction act; 68 69 act.sa_handler = handler; 70 act.sa_flags = SA_NODEFER; 71 sigemptyset(&act.sa_mask); 72 if (sigaction(SIGQUIT, &act, 0) == -1) { 73 perror("Unexpected error while attempting to " 74 "setup test pre-conditions"); 75 return PTS_UNRESOLVED; 76 } 77 78 if (raise(SIGQUIT) == -1) { 79 perror("Unexpected error while attempting to " 80 "setup test pre-conditions"); 81 return PTS_UNRESOLVED; 82 } 83 84 return PTS_FAIL; 85 } else { 86 int s; 87 88 /* parent */ 89 if (wait(&s) == -1) { 90 perror("Unexpected error while setting up test " 91 "pre-conditions"); 92 return PTS_UNRESOLVED; 93 } 94 95 if (!WEXITSTATUS(s)) { 96 printf("Test PASSED\n"); 97 return PTS_PASS; 98 } 99 } 100 101 printf("Test FAILED\n"); 102 return PTS_FAIL; 103 } 104
