How to fork self in node.js?

I want to fork a new process in the very begin of my nodejs app.js, then in main process, a http server will be created, and in new process i will run a while true loop to do some jobs.

I have read child_process.fork(modulePath,..), it requires a modulePath, in my case I only need to fork a process like fork() in C

something like this:

// very begin of the server.js
fork(function(new_process) {
  // child process
  while(true) {
    //do sth
  }
});
// main process
// balabala
server.listen(3000, function () {
  console.log('Express server listening on port 3000');
});

via Sato