ask for help

[Xiang Ruan]

Hi,

I am not familiar with emacs-lisp programming, I just wonder if this list could 
give me some advice on how to implement the below functionality. 

Suppose I invoke a commend "a" in a buffer, then the buffer may have a name 
with "a".
I want to keep watching a specific file on my system, let's say, a file of 
"/data/b". 
When /data/b changes, I want emacs to automatically update or re-invoke "a" 
again in the same buffer "a" without catch my focus when I am working on other 
buffers.

My question is, is it possible to implement it?  If it is possible, can anybody 
suggest me a simple example ?

Thank you in advance.


Best regards,