Devil spawn

spawn.js

#!/usr/bin/env node
var child   = require('child_process');

var cp = child.spawn("dir", [""]);
cp.stdout.on("data", function(data) {
    console.log(data.toString());
});

cp.stderr.on("data", function(data) {
    console.error(data.toString());
    // Output: CreateProcessW: The system cannot find the file specified.
});


// Using Node.js v0.8.8 on Windows 7 64-bit

dir is not an executable in windows. It is command on cmd.exe. You should call "cmd.exe /c dir"