gistfile1.js

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

console.error('process.stdout._handle is: ' + process.stdout._handle);

var child = spawn('node.exe', ['-e', 'console.log("foo")']);
child.stdout.pipe(process.stdout);

child.on('exit', function(code) {
  console.error('child exited');
  console.error('process.stdout._handle is: ' + process.stdout._handle);
});