DragonFlyBSD

#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);

}