how to prevent ./*

[Martin Vazquez]

Can anyone tell me how to configure sudoers in order to prevent someone from 
doing ./* ?
I am trying to prevent someone from executing a command XX, so I configured

!/usr/bin/XX

but still that user can go and do cd /usr/bin, ./XX.

I cannot seem to put ! ./XX in sudoers, I get a syntax error.

Can anyone tell how to do it?

By the way, is it possible to include subdirectories when putting wildcards? 
For instance, I would like !/usr/* to prevent from doing everything under 
/usr, including subdirectories. Any idea?

Thanks a lot

Martin

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