gistfile1

if (process.argv[2] === 'child')
  child();
else
  parent();

function parent() {
  var spawn = require('child_process').spawn;
  var node = process.execPath;
  var child = spawn(node, [__filename, 'child']) //, {stdio:'inherit'});
  console.log('pid=%d', child.pid);
  child.stdout.on('data', function(c) {
    console.log(("stdout: " + c).trim());
  });
  child.stderr.on('data', function(c) {
    console.error(('stderr: ' + c).trim());
  });
  child.on('exit', function() {
    console.log('child exit');
  });
}

function child() {
  console.log('hello');
  console.log(process.stdout);
  setTimeout(function() { process.exit() }, 1000)
}