I just installed the Blowfish patch to my linux box. Now, I am unsure at how to use it.

Any ideas on where I could see some examples?
Basically, I am modifying system calls, system calls sys_read, sys_write, and I want to encrypt (via Blowfish) the filename, and the text that is written to the file.

This is for a school project, any help would be greatly GREATLY appreciated.