public access unix accounting & admin

[heiser at tdw201.ed.ray.com]

This is a question for those of you running public-access Unix systems,
especially if they're on Esix or other Sysvr3 386 systems.

Is there an accounting program floating around to keep track of 
"subscription" users?  If a user has paid a subscription for 6 months, what
method do use to (a) notify the user when the subscription is nearing
its end, and (b) notify the admin of that fact, and (c) put the account
in limbo (chahnge the passwd) until such time as the user pays up again.
I guess it wouldn't be too hard to write something to do this ... but why
re-invent the wheel...  

Also, is there a program around to allow users to set up their own 
shell accounts?  I'm not sure I'll even be doing things this way, but it'd
be interesting to know for future reference.  What I actually plan to do is
to let all new users login via the bbs, then leave a message if they want
to have shell access.  Any comments on this?

-- 
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