Shutdown hal runs at startup.

so i have an issue where the shutdown hal is not doing what i need.  
i suspect that when i shut down the loadusr python file may be removed befor the comand run?  
but in my testin my shutdown file runs at start up too.  

from my main hal file. 
from my shutdown hal file 
i know the setp commands work when i run them form the HAL comand  in the Gui.  

butt i all so get the data form the shutdown hal at startup. so 
 

Ok, I used hal show, and I can see that the pin changes just before hal show closes.
So I think that my componit is destroyed before it can fire the message it is designed to do.
not sure how to fix that

I think this article may help.

www.theodinproject.com/lessons/foundations-asking-for-help

Here is an example, how atexit can be applied.

forum.linuxcnc.org/38-general-linuxcnc-q...ting-linuxcnc#178821

Im sorry i got a little of target here.
My real questions are: should the shutdown.hal run at start up? 
Is this expected behavior?
How fast are loaded user components removed after a shutdown?
Is there a way to pause for a few seconds after the shutdown.hal is called before user components are removed?

All that being said.  
Maha thanks for the link.  i had missed a python library for at exit.  this will almost fix my issue.  i had looked at that a while ago to answer other question i had, for got what he was working on.