Auto-logoff facility in Unix
guy at rlgvax.UUCP
guy at rlgvax.UUCP
Fri May 11 15:59:16 AEST 1984
> This would really only work on USG Unix, but if you have the TIMEOUT
> facility in your /bin/sh, and you (i.e. the system administrator) want to
> force auto-logout, it is pretty easy. Just add two lines to /etc/profile:
> TIMEOUT=... # set to amount of time
> readonly TIMEOUT
> The USG sh, when it is a login shell, reads /etc/profile, and then .profile
> in the home directory. Making TIMEOUT readonly will 1) keep users from
> changing it, and 2) automatically export it to subshells.
> Of course the knowledgeable/devious user can always get around it:
The knowledgable/devious user can always say
exec /bin/sh
which voids all "readonly" "declarations". So much for "readonly" as
a security measure, except in restricted shells...
Guy Harris
{seismo,ihnp4,allegra}!rlgvax!guy
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