Handling a directory search

[Charles Manning <manningc2@actrix.gen.nz>]

Hi folks.

I'm tweaking the readdir handling for YAFFS and need to be able to manage a 
"directory search context" structure where I can stash the context. 

ie.

/* user prog  and corresponding YAFFS operation */

   opendir(..);   /* YAFFS needs to create a search context */

  readdir(...);   /* YAFFS needs to use the search context */

  closedir(...); /* YAFFS needs to release the search context */

I am unsure as to how to hook the opendir and closedir to create/release the 
directory search context. 

Any pointers?

First prize: Any examples?

Thanx

-- Charles