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From: kvc@nrcvax.UUCP (Kevin Carosso)
Newsgroups: comp.os.vms
Subject: Re: How do you flush buffers?
Message-ID: <1288@nrcvax.UUCP>
Date: Fri, 13-Nov-87 21:31:59 EST
Article-I.D.: nrcvax.1288
Posted: Fri Nov 13 21:31:59 1987
Date-Received: Tue, 17-Nov-87 03:29:48 EST
References: <1655@uqcspe.OZ>
Reply-To: kvc@minnie.UUCP (Kevin Carosso)
Organization: Network Research Corp.  Oxnard, CA
Lines: 27

In article <1655@uqcspe.OZ> miw@uqcspe.cs.uq.oz (Mark Williams) writes:
>G'day,
>      I have a small problem with writing to files that perhaps someone can
>help me with.

Mark goes on to explain that he creates a shareable log file, but the data
is not getting flushed out to that file.

What you need to do is call the RMS routine $FLUSH to get your data out
of RMS's buffering mechanisms and into the actual file.  $FLUSH, documented
in the RMS manual, requires the address of the RAB (Record Access Block)
of the record stream to be flushed.  You can get the RAB of a Pascal file
variable by calling the Pascal RTL routine PAS$RAB.  PAS$RAB is documented
in the Pascal manual.  It's a simple call as well, taking a Pascal file
variable returning the address of the RAB.

I have actually done this, and it works very well.  If you require, I can
try to dig up my code, but it's no longer handy to get to.  You'll need
to choose how often you want to flush.  Since you probably don't write
to your log file with ferocious intensity, else you'd have filled up
you disks by now, you may as well do a flush after every write.  That's what
I did.

        /Kevin Carosso                     kvc@nrcvax.uucp
         Network Research Co.              kvc%nrcvax@trwind.trw.com
                                           kvc@engvax.scg.hac.com
                                           kvc@ymir.bitnet