child process interruption and signal control

main.js

const child_process = require('child_process');
const process = require('process');

process.on('SIGINT', () => console.log("ooh this is sigint"));
process.on('SIGUSR1', () => console.log("oh this is sigusr1!!"));


function block4ever() {
  setTimeout(() => {} , 1000000);
}

function spawntalker(message) {
  child_process.fork('./talk4ever.js', ['hi there']);
}

function main() {
  spawntalker();
  block4ever();
}

main();

talk4ever.js

const process = require('process');

function monitorPpid() {
  setInterval(() => {
    if (process.ppid == 1) {
      console.log('talk4ever.js parent process died, quitting.');
      process.exit(0);
    }
  }, 1000);
}

function main() {
  monitorPpid();
  setInterval(() => console.log(process.argv[2] || 'hello'), 2000);
}

main();