// Write a program that creates a zombie, and then call system() from stdlib.h
// (for executing a command from within a program) to execute the ps(1) command
// to verify that the process is a zombie.
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

void create_zombie() {
    int pid = fork();

    if (pid == 0) {
        sleep(100000);
    } else {
        _exit(0);
    }
}

void get_ps(int pid) {
    char spid[1000];
    sprintf(spid, "ps aux | awk '$2 == %d { print }'", pid);
    system(spid);
}


int main(void) {
    int pid = fork();

    if (pid == 0) {
        create_zombie();
    } else {
        get_ps(pid);
    }

    return -1;
}