1 /* 2 * Copyright (C) 2012 Cyril Hrubis <chrubis (at) suse.cz> 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 22 */ 23 24 #include <sys/wait.h> 25 26 #include "test.h" 27 28 char *TCID = "tst_checkpoint_child"; 29 int TST_TOTAL = 1; 30 31 void handler(int sig LTP_ATTRIBUTE_UNUSED) 32 { 33 if (write(2, "Child in sighandler\n", 20)) { 34 /* silence build time warnings */ 35 } 36 } 37 38 int main(void) 39 { 40 int pid; 41 volatile int i; 42 43 pid = fork(); 44 45 switch (pid) { 46 case -1: 47 tst_brkm(TBROK | TERRNO, NULL, "Fork failed"); 48 break; 49 case 0: 50 fprintf(stderr, "Child starts\n"); 51 52 signal(SIGALRM, handler); 53 54 for (i = 0; i < 100000000; i++); 55 56 fprintf(stderr, "Child about to sleep\n"); 57 58 pause(); 59 60 fprintf(stderr, "Child woken up\n"); 61 62 return 0; 63 break; 64 default: 65 /* Wait for child to sleep */ 66 fprintf(stderr, "Parent waits for child to fall asleep\n"); 67 TST_PROCESS_STATE_WAIT(NULL, pid, 'S'); 68 fprintf(stderr, "Child sleeping, wake it\n"); 69 kill(pid, SIGALRM); 70 break; 71 } 72 73 wait(NULL); 74 return 0; 75 } 76
