node.js - How to kill all child processes on exit? -

how kill child processes (spawned using child_process.spawn) when node.js process exit?

i think way keep reference childprocess object returned spawn, , kill when exit master process.

a small example:

var spawn     = require('child_process').spawn; var children  = [];  process.on('exit', function() {   console.log('killing', children.length, 'child processes');   children.foreach(function(child) {     child.kill();   }); });  children.push(spawn('/bin/sleep', [ '10' ])); children.push(spawn('/bin/sleep', [ '10' ])); children.push(spawn('/bin/sleep', [ '10' ]));  settimeout(function() { process.exit(0) }, 3000);