Small NodeJs Script to log a ping command ( windows ) with a timestamp

gistfile1.txt

var spawn = require('child_process').spawn,
  fs = require('fs');

var logFile = fs.createWriteStream("pingtest.txt", {flags:"w",mode:0777});
var pingCmd = spawn("ping", ["-t", "google.de"]);

var tmp = "";
pingCmd.stdout.on("data", function(buffer){
	tmp += buffer.toString();
	
	if(tmp.indexOf("Antwort") != -1) {
		var d = new Date();
		var timestamp = d.getDay() + "." + (d.getMonth()+1) + "." + d.getFullYear() + " - " + d.getHours() + ":" + d.getMinutes() + ":" + d.getSeconds();
		
		tmp = tmp.replace("Antwort", timestamp + " -- Antwort");
		
		logFile.write(tmp, 'binary');
		tmp = "";
	}
});