gistfile1.js

var child_process = require('child_process');
var child = child_process.spawn('ls', ['.']);
child.stdin.end();
child.stdout.pipe(process.stdout);
child.stderr.pipe(process.stderr);
child.on('exit', function() {
	console.log("Child exited");
});

gistfile2.txt

node.js:181
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: Socket is not writable
    at WriteStream._writeOut (net.js:392:11)
    at WriteStream.write (net.js:378:17)
    at Object.<anonymous> (console.js:61:18)
    at ChildProcess.<anonymous> (/Users/hongli/foo.js:7:10)
    at ChildProcess.emit (events.js:67:17)
    at Socket.<anonymous> (child_process.js:179:12)
    at Socket.emit (events.js:81:20)
    at Array.<anonymous> (net.js:834:12)
    at EventEmitter._tickCallback (node.js:173:26)