Restricted SSH access

[Vladimir Kovacevic]

Hi!
I'm working on embeded Fedora on Atmel and have a problem with 
restricting ssh access for user that log on to system.
The only privilege I want to give them is executing some programs that I 
wrote (permit any view on a system directories except /home/user_name).
I looked in /etc/ssh_config but did't find what I was looking wor. Also,
tried with assigning a user /bin/bash console with -r (restricted) 
parameter (set it up on /etc/passwd)
but then I couldn't log on with putty or WinSCP to system.
Any ideas for simple solution for my problem?

P.S. Somebody might ask why would somebody use ssh for that limited 
access. Answer is that it must be supported, project specifications...

Thx in advance!

Vlada