Killing process in node.js

Question

I have a piece of code that I really like, but there is a bug in one of the modules. This, sometimes, causes a runaway process that hogs up to 99% of the CPU time.

Now, I found a piece of code posted by someone with the same issue in github:

exec = require('child_process').exec

terminatePH = (ph, cb) ->
    ph.exit()
    exec 'kill '+ph.process.pid, cb

The problem is I do not understand this code. I think it is Coffeescript (or something along those lines) but it certainly is not Node.js that I am using.

Can someone please enlighten me? My main issue is that the 'exec' part, the one that does the killing, is AFTER 'ph.exit()'. Will this be executed properly?

Any ideas?

Answer 1

Yes you're right, this code was writen in CoffeeScript.

As a javascript:

var exec = require('child_process').exec()

var terminatePH = function (ph, cb) {
   ph.exit();
   return exec('kill ' + ph.process.pid, cb);
}