// http://nodejs.org/api.html#_child_processes
var sys = require('sys')
var spawn = require('child_process').spawn;
var filename = process.ARGV[2];
 
if (!filename)
  return sys.puts("Usage: node <server.js> <filename>");
 
var tail = spawn("tail", ["-f", filename]);
sys.puts("start tailing");
 
tail.stdout.on("data", function (data) {
  sys.puts(data);
});
 
// node tail.js development.log