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 assertion #17 by verifying that select returns -1 with 10 errno set to EINTR if a handler for the SIGTSTP signal is setup with 11 the SA_RESTART flag cleared. 12 * 12/18/02 - Adding in include of sys/time.h per 13 * rodrigc REMOVE-THIS AT attbi DOT com input that it needs 14 * to be included whenever the timeval struct is used. 15 */ 16 17 #include <signal.h> 18 #include <stdio.h> 19 #include <stdlib.h> 20 #include <sys/select.h> 21 #include <sys/wait.h> 22 #include <sys/time.h> 23 #include <sys/types.h> 24 #include <unistd.h> 25 #include <errno.h> 26 #include "posixtest.h" 27 28 volatile sig_atomic_t wakeup = 1; 29 30 void handler(int signo) 31 { 32 printf("Caught SIGTSTP\n"); 33 wakeup++; 34 } 35 36 int main(void) 37 { 38 pid_t pid; 39 struct timeval tv; 40 41 if ((pid = fork()) == 0) { 42 /* child */ 43 struct sigaction act; 44 45 act.sa_handler = handler; 46 act.sa_flags = 0; 47 sigemptyset(&act.sa_mask); 48 sigaction(SIGTSTP, &act, 0); 49 50 while (wakeup == 1) { 51 tv.tv_sec = 3; 52 tv.tv_usec = 0; 53 if (select(0, NULL, NULL, NULL, &tv) == -1 && 54 errno == EINTR) { 55 perror("select"); 56 return PTS_PASS; 57 } 58 } 59 60 return PTS_FAIL; 61 } else { 62 /* parent */ 63 int s; 64 65 /* 66 There is a race condition between the parent 67 process sending the SIGTSTP signal, and the 68 child process being inside the 'select' function 69 call. 70 71 I could not find a pure POSIX method for determining 72 the state of the child process, so I just added a delay 73 so that the test is valid in most conditions. (The 74 problem is that it would be perfectly legal for a 75 POSIX conformant OS to not schedule the child process 76 for a long time.) 77 */ 78 tv.tv_sec = 1; 79 tv.tv_usec = 0; 80 select(0, NULL, NULL, NULL, &tv); 81 82 kill(pid, SIGTSTP); 83 waitpid(pid, &s, 0); 84 if (WEXITSTATUS(s) == PTS_PASS) { 85 printf("Test PASSED\n"); 86 return PTS_PASS; 87 } 88 } 89 90 printf("Test FAILED\n"); 91 return PTS_FAIL; 92 } 93
