Check Machine Location

check_location.js

#!/usr/bin/env node

var args = process.argv.slice(2);

//console.log('Started');

// String startsWith polyfill
if (!String.prototype.startsWith) {
  Object.defineProperty(String.prototype, 'startsWith', {
    enumerable: false,
    configurable: false,
    writable: false,
    value: function (searchString, position) {
      position = position || 0;
      return this.lastIndexOf(searchString, position) === position;
    }
  });
}

var os = require('os');
var ifaces = os.networkInterfaces();

var wlan = ifaces['wlan0'];
if (wlan !== undefined && wlan !== null) {
	var wlan_address = ifaces['wlan0'][0].address;

	//console.log(wlan_address);

	if (wlan_address.startsWith("10")) {
		console.log("Dataprev");
    //process.stdout.write("Hello");
	} else {
		console.log("External");
	}
  process.exit(0);
} else {
	console.log("Interface Not Found.");
  process.exit(1);
}