pseudo tail in nodejs

nodetail

var fs = require('fs');
var lastSize = 139658900;

var timer = setInterval(function(){
	fs.stat("E:/wamp/logs/access.log",function(err,stats){
		if(stats.size > lastSize){
			var buf = fs.createReadStream("E:/wamp/logs/access.log",{start:lastSize,end:stats.size});
			buf.setEncoding('utf8');
			
			buf.on('data',function(data){
				console.log(data);
			});
			
		}
		lastSize = stats.size;
	});
},5000);