#include <iostream>
#include <unistd.h>   // for sleep.


#include <signal.h>  // for signal, don't worry about this yet.

using namespace std;


// Don't worry too much about this yet.
static void Handler(int) {
   cout << "\t\tBRRRRRIIIINNNNGGGGG!!!!!!!!" << endl;
   return;
}

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

    unsigned long int napTime = 5;

    if (argc > 1) {
        napTime = static_cast<unsigned long> (atoi(argv[1]));
    }

    // bad, there are better ways to do this.
    // Don't worry about this for now.
    // This is for demo purposes only.
    signal(SIGUSR1, Handler);

    pid_t mypid = getpid();

    cout << "Hello, this is process " << mypid << endl;

    do {
       cout << "\tTrying to sleep for " << napTime << endl;
       napTime = sleep(napTime);
       if (napTime > 0) {
          cout << "\tShoot, someone got me up early, " 
	       << napTime << " still to sleep" << endl;
	  cout << endl;
       }
    } while (napTime > 0);

    cout << "All done sleeping " << endl;

    return 0;
}