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From: vasoll@a.cs.okstate.edu (Mark Vasoll)
Newsgroups: comp.unix.questions,comp.bugs.sys5
Subject: Re: SysV lp spooler a security hole
Message-ID: <2546@okstate.UUCP>
Date: Thu, 10-Sep-87 12:48:52 EDT
Article-I.D.: okstate.2546
Posted: Thu Sep 10 12:48:52 1987
Date-Received: Sat, 12-Sep-87 15:57:16 EDT
References: <313@pvab.UUCP> <1284@mhres.mh.nl> <1986@kitty.UUCP>
Organization: Oklahoma State Univ., Stillwater
Lines: 33
Summary: An example of just how far you can go with System V lp
Xref: mnetor comp.unix.questions:4001 comp.bugs.sys5:209


I've been reading about the various uses that people have dreamed
up for System V lp and thought I would contribute my own...

I wrote an interface module that will open an outbound async port
(ala UUCP style) and execute a script controlled conversation with
whatever might be there (e.g. a "smart" modem, a data switch, etc.,
in our case a Case Communications DCX 850) to establish a connection
to the destination printer, print the job, then return to the script
for any needed "disconnect" conversation (reseting the modem or whatever).
With this and it's compliment that a friend of mine wrote for VAX/VMS's
Symbiont modification facilities, we can have printers all across campus
that are simply attached to our data switch and are shared between all
UNIX System V and VMS systems.

Another interface we did is somewhat stranger.  It packages up the
print job as a mail message and mails it to a remote VMS system
that is equipt with VMS/PMDF, which then uses the DELIVER facility
(provided as part of the PMDF distribution) to unpack the job and
issue a PRINT command with the /switches coming from the subject
line of the message.  This one is just a shell script on the UNIX
system and a .COM file on the VMS system.

All of this can be made available, after a little more testing,
if there is any interest.

Cheers,

-- 
Mark Vasoll
Computing and Information Sciences   Internet:  vasoll@a.cs.okstate.edu
Oklahoma State University            UUCP:  {cbosgd, ihnp4, rutgers, seismo,
Stillwater, Oklahoma                         uiucdcs}!okstate!vasoll