want-kill-tree.js

var spawn = require('child_process').spawn;

var depth = process.argv[2];

if (!depth) {
  var p = spawn('node', [ process.argv[1], '1' ], { stdio: 'inherit' });
  setTimeout(() => {
    console.log(process.pid, 'Killing child', p.pid);
    p.kill();
  }, 500);
} else if (depth === '1') {
  console.log(process.pid, 'Hello from child');
  spawn('node', [ process.argv[1], '2' ], { stdio: 'inherit' });
} else if (depth === '2') {
  console.log(process.pid, 'Hello from grand child');
  setTimeout(() => { console.log(process.pid, '!!! Want not to be printed') }, 2 * 1000);
}