code: function handleExit (canCancel, signal, code) {
  	var i = 0,
  		sub;
  
  	while ((sub = subs[i++])) {
  		if (sub[0].call(sub[1], canCancel, signal, code) === false && canCancel) {
  			return;
  		}
  	}
  
  	if (canCancel) {
  		process.exit(code);
  	}
  }
docs: Handler for all exit events