1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <errno.h> 30 #include <stdbool.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <sys/resource.h> 35 #include <sys/wait.h> 36 #include <unistd.h> 37 38 #define CHILD_EXIT_CODE 111 39 40 typedef int (*wait_call_function)(pid_t child_pid); 41 42 static bool check_wait_call(const char *title, wait_call_function wait_func, 43 int expected_exit_code) { 44 printf("Testing %s(): ", title); 45 int cpid = fork(); 46 if (cpid < 0) { 47 fprintf(stderr, "ERROR: fork() failed: %s\n", strerror(errno)); 48 return false; 49 } 50 51 if (cpid == 0) { /* in the chid process */ 52 printf("Child created pid=%d parent_pid=%d\n", getpid(), getppid()); 53 exit(expected_exit_code); 54 } 55 56 /* in the parent process */ 57 printf("Parent waiting for child with pid=%d\n", cpid); 58 int exit_code = wait_func(cpid); 59 if (exit_code < 0) 60 return false; 61 62 if (exit_code != expected_exit_code) { 63 fprintf(stderr, "ERROR: Child exited with code %d, expected %d\n", 64 exit_code, expected_exit_code); 65 return false; 66 } 67 printf("Testing %s(): OK\n", title); 68 return true; 69 } 70 71 // To be called by check_wait_call() to check wait(). 72 static int check_wait(pid_t child_pid) { 73 int status = 0; 74 pid_t ret = wait(&status); 75 if (ret != child_pid) { 76 fprintf(stderr, "ERROR: wait() returned %d, expected %d\n", ret, child_pid); 77 return -1; 78 } 79 return WEXITSTATUS(status); 80 } 81 82 // To be called by check_wait_call() to check waitpid() 83 static int check_waitpid(pid_t child_pid) { 84 int status = 0; 85 pid_t ret = waitpid((pid_t)-1, &status, 0); 86 if (ret != child_pid) { 87 fprintf(stderr, "ERROR: waitpid() returned %d, expected %d\n", ret, child_pid); 88 return -1; 89 } 90 return WEXITSTATUS(status); 91 } 92 93 // To be called by check_wait_call() to check wait3() 94 static int check_wait4(pid_t child_pid) { 95 int status = 0; 96 struct rusage ru; 97 pid_t ret = wait4(-1, &status, 0, &ru); 98 if (ret != child_pid) { 99 fprintf(stderr, "ERROR: wait4() returned %d, expected %d\n", ret, child_pid); 100 return -1; 101 } 102 return WEXITSTATUS(status); 103 } 104 105 int main(int argc, char *argv[]) { 106 if (!check_wait_call("wait", check_wait, CHILD_EXIT_CODE + 0)) { 107 return EXIT_FAILURE; 108 } 109 if (!check_wait_call("waitpid", check_waitpid, CHILD_EXIT_CODE + 1)) { 110 return EXIT_FAILURE; 111 } 112 if (!check_wait_call("wait4", check_wait4, CHILD_EXIT_CODE + 3)) { 113 return EXIT_FAILURE; 114 } 115 116 return EXIT_SUCCESS; 117 } 118 119
