NodeJS Bash OS Check

var sys = require('util')
var exec = require('child_process').exec;
var child;
var bashos = 'unix';

child = exec("echo $PATH", function (error, stdout, stderr) {

  if( (stdout.indexOf('Windows') > -1) || (stdout.indexOf('System32') > -1) ) {
    bashos = 'windows';
  }

  console.log(bashos);

});