/* Copyright (c) International Business Machines Corp., 2009
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* Author: Matt Helsley <matthltc@us.ibm.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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#include <signal.h>
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int main(int argc, char **argv)
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{
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struct timeval start, now;
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pid_t child_root;
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unsigned int duration = 1, num_tasks = 0;
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if (argc > 1) {
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int i;
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for (i = 0; i < argc; i++) {
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if (strcmp(argv[i], "--help") == 0) {
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printf("%s [duration]\n", argv[0]);
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exit(EXIT_SUCCESS);
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}
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if (sscanf(argv[i], "%u", &duration) == 1) {
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printf("%u second duration\n", duration);
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break;
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}
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}
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}
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/*
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* Wait until we're told to go. This allows the driver script to
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* configure the test system (e.g. by putting this task in a
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* suitable cgroup) before the timed forkbomb begins.
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*/
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{
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char *word;
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while (scanf("%as", &word) < 1) {
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}
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free(word);
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}
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if (gettimeofday(&start, NULL))
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exit(EXIT_FAILURE);
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child_root = fork();
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if (child_root == -1)
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exit(EXIT_FAILURE);
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/* if (child_root == 0)
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signal(SIGCHLD, SIG_IGN);*/
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do {
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if (child_root == 0) {
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/* signal(SIGCHLD, SIG_IGN);*/
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if (fork() == -1)
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break;
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} else {
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if (wait(NULL) > 0)
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num_tasks++;
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}
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if (gettimeofday(&now, NULL) && (errno != EINTR))
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break;
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} while ((now.tv_sec - start.tv_sec) <= duration);
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if (child_root != 0)
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printf("Forked %d tasks\n", num_tasks);
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exit(EXIT_SUCCESS);
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}
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