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 SIGALRM 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 wakeup++; 33 } 34 35 int main(void) 36 { 37 pid_t pid; 38 struct timeval tv; 39 40 if ((pid = fork()) == 0) { 41 /* child */ 42 struct sigaction act; 43 44 act.sa_handler = handler; 45 act.sa_flags = 0; 46 sigemptyset(&act.sa_mask); 47 sigaction(SIGALRM, &act, 0); 48 49 while (wakeup == 1) { 50 tv.tv_sec = 3; 51 tv.tv_usec = 0; 52 if (select(0, NULL, NULL, NULL, &tv) == -1 && 53 errno == EINTR) { 54 perror("select"); 55 return PTS_PASS; 56 } 57 } 58 59 return PTS_FAIL; 60 } else { 61 /* parent */ 62 int s; 63 64 /* 65 There is a race condition between the parent 66 process sending the SIGALRM signal, and the 67 child process being inside the 'select' function 68 call. 69 70 I could not find a pure POSIX method for determining 71 the state of the child process, so I just added a delay 72 so that the test is valid in most conditions. (The 73 problem is that it would be perfectly legal for a 74 POSIX conformant OS to not schedule the child process 75 for a long time.) 76 */ 77 tv.tv_sec = 1; 78 tv.tv_usec = 0; 79 select(0, NULL, NULL, NULL, &tv); 80 81 kill(pid, SIGALRM); 82 waitpid(pid, &s, 0); 83 if (WEXITSTATUS(s) == PTS_PASS) { 84 printf("Test PASSED\n"); 85 return PTS_PASS; 86 } 87 } 88 89 printf("Test FAILED\n"); 90 return PTS_FAIL; 91 } 92
