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From: joa@uklirb.UUCP
Newsgroups: comp.sys.apollo
Subject: Concurrency at open - (nf)
Message-ID: <41600002@uklirb.UUCP>
Date: Wed, 28-Oct-87 03:26:00 EST
Article-I.D.: uklirb.41600002
Posted: Wed Oct 28 03:26:00 1987
Date-Received: Sat, 31-Oct-87 14:08:46 EST
Lines: 19
Nf-ID: #N:uklirb:41600002:000:710
Nf-From: uklirb!joa    Oct 28 09:26:00 1987

I have some difficulties using files for reading and writing at the
same time. The problem is the following: I'd like to write to a file
with some program and at the same time to display this file with
the DM call 'cv <file>'. But if the writing program does the first
access to the file, it is locked and can't be shown by the DM. The
same happens if I try to read the file with a second program.

All tries with stream calls (STREAM_$REDEFINE) changing the attribute 
"concurrency at open" failed.

Anyone who has a solution for this problem, and with time to help?


Joachim Hassdenteufel-Koehler
University of Kaiserslautern
D-675 Kaiserlautern

Tel.:   (..631) 205-2647
e-mail: ...!mcvax!unido!uklirb!joa