1 /* 2 * Copyright (c) 2003, Intel Corporation. All rights reserved. 3 * Created by: majid.awad 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 9 /* sem_wait hangs when it tries to lock a locked semaphore, and then killed 10 * by sending a kill signal. 11 */ 12 13 #include <stdio.h> 14 #include <errno.h> 15 #include <unistd.h> 16 #include <semaphore.h> 17 #include <sys/stat.h> 18 #include <fcntl.h> 19 #include <signal.h> 20 #include <sys/wait.h> 21 #include "posixtest.h" 22 23 #define TEST "7-1" 24 #define FUNCTION "sem_wait" 25 #define ERROR_PREFIX "unexpected error: " FUNCTION " " TEST ": " 26 27 #define CHILDPASS 1 28 #define CHILDFAIL 0 29 30 void handler(int signo) 31 { 32 printf("In handler\n"); 33 } 34 35 int main(void) 36 { 37 sem_t *mysemp; 38 char semname[28]; 39 int pid, status; 40 41 sprintf(semname, "/" FUNCTION "_" TEST "_%d", getpid()); 42 43 mysemp = sem_open(semname, O_CREAT, 0, 1); 44 if (mysemp == SEM_FAILED || mysemp == NULL) { 45 perror(ERROR_PREFIX "sem_open"); 46 return PTS_UNRESOLVED; 47 } 48 49 if (sem_wait(mysemp) == -1) { 50 perror(ERROR_PREFIX "sem_wait"); 51 return PTS_UNRESOLVED; 52 } 53 54 pid = fork(); 55 if (pid == 0) { // child create the semaphore. 56 struct sigaction act; 57 58 act.sa_handler = handler; 59 act.sa_flags = 0; 60 if (sigemptyset(&act.sa_mask) == -1) { 61 perror("Error calling sigemptyset\n"); 62 return CHILDFAIL; 63 } 64 if (sigaction(SIGABRT, &act, 0) == -1) { 65 perror("Error calling sigaction\n"); 66 return CHILDFAIL; 67 } 68 69 sem_wait(mysemp); 70 71 if (errno == EINTR) { 72 printf("Test PASSED\n"); 73 return (CHILDPASS); 74 } 75 puts("TEST FAILED: errno != EINTR"); 76 return (CHILDFAIL); 77 78 } else { // parent to send a signal to child 79 int i; 80 sleep(1); 81 status = kill(pid, SIGABRT); // send signal to child 82 if (wait(&i) == -1) { 83 perror("Error waiting for child to exit\n"); 84 return PTS_UNRESOLVED; 85 } 86 87 if (!WEXITSTATUS(i)) { 88 return PTS_FAIL; 89 } 90 puts("TEST PASSED"); 91 sem_unlink(semname); 92 return PTS_PASS; 93 } 94 95 return PTS_UNRESOLVED; 96 } 97
