JackieLin

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

// show  Windows letter, to compatible Windows xp

function showLetter(callback) {
    var wmicResult;
    var command = exec('wmic logicaldisk get caption', function(err, stdout, stderr) {
        if(err || stderr) {
            console.log("root path open failed" + err + stderr);
            return;