Problem with file permission when export && execute program when commit

[rico]

hi,
I wish to execute a program every time I commit a file (after I commit, 
not before). I see the -i option but it work only before commiting a 
file. In fact, every time I commit a modification in my repository, I 
wish to export it in another directory, and I don't know how to proceed.

The second problem is about file permissions : when I export a file, 
"others" users can't read it, but I need this permission. I have tried 
to modify the user umask and the CVSUMASK, but it made no change  :-(