locking idle text consoles

Cristian Grigoriu <[email protected]>
Newsgroups gmane.comp.security.linux
Message-ID <[email protected]> 
Hello everybody,

I wonder if it's possible to lock out idle text consoles. The intended 
behaviour would be the same as a screensaver's in X Windows environment.

Unfortunately $TMOUT doesn't help here. First, it closes the session by 
logging out the user, second it counts screen updates as activity and 
last it could be easily circumvented by a user launching another shell.

Thank you,

Grig
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