1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * Copyright (C) 2017 Cyril Hrubis <chrubis (at) suse.cz> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * Test Description: 22 * Check the functionality of the Alarm system call when the time input 23 * parameter is zero. 24 * 25 * Expected Result: 26 * The previously specified alarm request should be cancelled and the 27 * SIGALRM should not be received. 28 * 29 * HISTORY 30 * 07/2001 Ported by Wayne Boyer 31 */ 32 33 #include <stdio.h> 34 #include <unistd.h> 35 #include <sys/types.h> 36 #include <errno.h> 37 #include <string.h> 38 #include <signal.h> 39 40 #include "tst_test.h" 41 42 static volatile int alarms_received = 0; 43 44 static void sigproc(int sig) 45 { 46 if (sig == SIGALRM) 47 alarms_received++; 48 } 49 50 static void setup(void) 51 { 52 SAFE_SIGNAL(SIGALRM, sigproc); 53 } 54 55 static void verify_alarm(void) 56 { 57 int ret; 58 59 alarm(2); 60 sleep(1); 61 62 ret = alarm(0); 63 64 /* Wait for signal SIGALRM */ 65 sleep(2); 66 67 if (alarms_received) 68 tst_res(TFAIL, "Received %i alarms", alarms_received); 69 else 70 tst_res(TPASS, "Received 0 alarms"); 71 72 if (ret == 1) 73 tst_res(TPASS, "alarm(0) returned 1"); 74 else 75 tst_res(TFAIL, "alarm(0) returned %i, expected 1", ret); 76 } 77 78 static struct tst_test test = { 79 .setup = setup, 80 .test_all = verify_alarm, 81 }; 82
