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

#include <signal.h>
#include <sys/wait.h>

pid_t children[5];

void announce_death() {

    printf("i'm pid #%lu and i died.\n", (long) getpid());
}

int main(int argc, char *argv[]) {

    pid_t our_pid;
    our_pid = getpid();

    for(int i = 0; i < 5; i++) {
        if((children[i] = fork()) == 0)
            goto child;
        else
            sleep(1);
    }

    for(int i = 0; i < 5; i++) {

        kill(children[i], SIGTERM);
        wait(0);
    }

    return 0;

    child:
        printf("i'm pid #%lu!\n", (long)getpid());
        atexit(announce_death);
        exit(0);
}