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From: dkeisen@Gang-of-Four.Stanford.EDU (Dave Eisen)
Newsgroups: comp.unix.questions,comp.unix.ultrix,cs.unix.questions
Subject: Re: file and record locking questions (general)
Keywords: record,locking,ultrix
Message-ID: <1991Mar30.023826.9925@neon.Stanford.EDU>
Date: 30 Mar 91 02:38:26 GMT
References: <1991Mar29.040736.18783@bronze.ucs.indiana.edu> <1991Mar29.124756.18856@news.cs.indiana.edu>
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In article <1991Mar29.124756.18856@news.cs.indiana.edu> royle@tope.cs.indiana.edu (Keenan Royle) writes:
>yes it is portable. (not just Ultrix)
>
>flock locks a file.
>lockf and fcntl can lock records in files (or the whole file).
>lockf is just a nice front-end to fcntl.
>
>All locks are advisory.
>
>Ultrix is BSD based.  Portablity to system 5 may be trickier.
>

Yes it might be. The locking mechanisms (using lockf and fcntl) in 
SCO Xenix are *not* advisory locks, they are out and out LOCKS. I believe
it's the same in System V.

 

--
Dave Eisen                      
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