Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!kth!draken!tut!tukki!eloranta
From: eloranta@tukki.jyu.fi (Jussi Eloranta)
Newsgroups: comp.unix.wizards
Subject: Re: Locks for exclusive access to resources
Message-ID: <907@tukki.jyu.fi>
Date: 15 Jun 89 05:14:24 GMT
References: <1020@twwells.uucp> <1989Jun14.052648.20183@twwells.com>
Reply-To: eloranta@tukki.jyu.fi (Jussi Eloranta)
Organization: University of Jyvaskyla, Finland
Lines: 15

How can I lock a tape frive for example intelligently? (bsd 4.2)
Links are not usable int his case since all program won't check for that lock.
The only thing that I figured out was just to chown + chmod the
tape special files in /dev. But this surely contains some race conditions..
I also file locks (flock and lockf) since they are 'advisory' locks, besides
the fork would be a problem...

Does anyone know a bettert way to do this?

Jussi
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Jussi Eloranta               Internet(/Bitnet):
University of Jyvaskyla,     eloranta@tukki.jyu.fi
Finland                      [128.214.7.5]