1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved. 4 * Author: Richard Logan 5 * 6 * Test Description: 7 * The process does a fork: 8 * 1) By the value returned by child's alarm(0), check whether child 9 * process cleared the previously specified alarm request or not. 10 * 2) By the value returned by parent's alarm(0), check whether parent 11 * process cleared the previously specified alarm request or not. 12 */ 13 14 #include <errno.h> 15 #include <signal.h> 16 #include <stdlib.h> 17 #include <unistd.h> 18 19 #include "tst_test.h" 20 21 static void verify_alarm(void) 22 { 23 pid_t pid; 24 25 TEST(alarm(100)); 26 27 pid = SAFE_FORK(); 28 if (pid == 0) { 29 TEST(alarm(0)); 30 if (TST_RET != 0) { 31 tst_res(TFAIL, 32 "alarm(100), fork, alarm(0) child's " 33 "alarm returned %ld", TST_RET); 34 } else { 35 tst_res(TPASS, 36 "alarm(100), fork, alarm(0) child's " 37 "alarm returned %ld", TST_RET); 38 } 39 exit(0); 40 } 41 42 TEST(alarm(0)); 43 if (TST_RET != 100) { 44 tst_res(TFAIL, 45 "alarm(100), fork, alarm(0) parent's " 46 "alarm returned %ld", TST_RET); 47 } else { 48 tst_res(TPASS, 49 "alarm(100), fork, alarm(0) parent's " 50 "alarm returned %ld", TST_RET); 51 } 52 } 53 54 static struct tst_test test = { 55 .test_all = verify_alarm, 56 .forks_child = 1, 57 }; 58
