shouldn't create zombies

zombifier.c

#include <stdlib.h>
#include <unistd.h>
#include <signal.h>

int main(int argc, char **argv) {
    int pid = 0;
    int i;
    for( i = 300; i>0; i-- ) {
        signal(SIGCHLD, SIG_IGN);
        pid = fork();
        switch(pid) {
            case -1:
                exit(1);
            case 0:
                exit(2);
            default:
                sleep(1);
        }
    }
    exit(0);
}