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From: brad@bradley.UUCP
Newsgroups: comp.unix.questions
Subject: Re: lp spool system query
Message-ID: <10800006@bradley>
Date: Mon, 17-Aug-87 23:45:00 EDT
Article-I.D.: bradley.10800006
Posted: Mon Aug 17 23:45:00 1987
Date-Received: Fri, 21-Aug-87 06:44:23 EDT
References: <507@chas2.UUCP>
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Nf-ID: #R:chas2.UUCP:507:bradley:10800006:000:878
Nf-From: bradley.UUCP!brad    Aug 17 22:45:00 1987


Well I have something like your problems....I have a printronix
MVP printer....I wanted to be able to print 10 chars/inch and if
someone else sent something at 17 pitch not to come out at the same
time (which is easy....just have them use the same lock file).  But
as I recall this had a draw back of either the 17 pitch coming out
at 10 pitch ( I think the spooling directories were the same), or
the 17 pitch file not coming out until someone sends another 17 pitch
file while the printer is not printing another pitch.

My fix was to patch lpd to wait for the /dev/tty entry to be unlocked
via flock and to have the lock files in different directories.

The solution might not be helpful for binary sites.


Bradley Smith			UUCP: {cepu,ihnp4,noao,uiucdcs}!bradley!brad
Text Processing			ARPA: cepu!bradley!brad@CS.UCLA
Bradley University		PH: (309) 677-2337
Peoria, IL 61625