Node version of popen?

gistfile1.js

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

var sh = spawn('sh');

sh.stdout.on('data', function (data) {
  console.log('sh: \n', data.toString());
});

sh.stderr.on('data', function (data) {
  console.error('error: \n', data.toString());
});

console.log('ls');
sh.stdin.write('ls\n');

console.log('kill subprocess\n');
sh.kill();