time dependent denial of login

[Kai Wollweber]

Hi,

we want to enable/disable clients in classrooms depending on a timetable. This 
means not to disable any user at all. Intended is to disable certain 
terminals.

At a given time a new login should be impossible whereas a running session may 
continue.

Is it possible to disable login on a certain set of clients at given times?

My first idea is to overwrite lts.conf by crontab. The disabled clients would 
get a non existing LDM_SERVER. Im not happy with this approach.

Any better ideas?
TIA
-- 
Kai Wollweber
Integrierte Gesamtschule
Eckernförde