1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) International Business Machines Corp., 2001 4 * Author: Wayne Boyer 5 * 6 * Test Description: 7 * By the SIGALRM signal, check whether the previously specified alarm request 8 * was cleared in the child process or not. 9 */ 10 11 #include <unistd.h> 12 #include <stdlib.h> 13 #include <errno.h> 14 #include <signal.h> 15 16 #include "tst_test.h" 17 18 static volatile int alarm_cnt = 0; 19 20 static void verify_alarm(void) 21 { 22 pid_t pid; 23 alarm_cnt = 0; 24 25 TEST(alarm(1)); 26 pid = SAFE_FORK(); 27 28 sleep(3); 29 30 if (pid == 0) { 31 if (alarm_cnt == 0) { 32 tst_res(TPASS, "alarm() request cleared in child"); 33 } else { 34 tst_res(TFAIL, "alarm() request not cleared in " 35 "child; alarms received:%d", alarm_cnt); 36 } 37 exit(0); 38 } 39 40 if (alarm_cnt != 1) 41 tst_res(TFAIL, "Sigalarms in parent %i, expected 1", alarm_cnt); 42 else 43 tst_res(TPASS, "Got 1 sigalarm in parent"); 44 } 45 46 static void sighandler(int sig LTP_ATTRIBUTE_UNUSED) 47 { 48 alarm_cnt++; 49 } 50 51 static void setup(void) 52 { 53 SAFE_SIGNAL(SIGALRM, sighandler); 54 } 55 56 static struct tst_test test = { 57 .test_all = verify_alarm, 58 .setup = setup, 59 .forks_child = 1, 60 }; 61
