McGuire_Ed@GRINNELL.MAILNET.UUCP (07/12/86)
Does anyone have a program which gets information on another process' open channels? I would like particularly to get at RMS data structures to find out current/next record, etc. I don't mind writing one myself if I can find out where to get the stuff. Any help much appreciated!
McGuire_Ed@GRINNELL.MAILNET (07/14/86)
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Date: Sun 13 Jul 86 13:22:47-PDT
From: Peter Karp <PKARP@SRI-IU.ARPA>
Subject: Re: VMS: open channel info
To: McGuire_Ed%GRINNELL.Mailnet@MIT-MULTICS.ARPA
Message-ID: <VAX-MM(194)+TOPSLIB(120)+PONY(0) 13-Jul-86 13:22:47.SRI-IU.ARPA>
In-Reply-To: Message from
" McGuire_Ed%GRINNELL.Mailnet@MIT-MULTICS.ARPA" of Fri,
11 Jul 86 17:44
I'm interested in this also. I thin kit would be nice to simply know
what files another process has open.
Peter
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This reminds me that there are two frustratingly limited tools for looking
at open channels, and people might like to know about them.
1. SHOW DEVICE/FILES <disk>
(Needs privileges: WORLD to see all other processes, BYPASS to see all
programs.) Lists process names, PIDs, and files open on the disk in
question.
2. SDA> SHOW PROCESS/INDEX=n/CHANNELS
(SDA is invoked by ANALYZE/SYSTEM. Needs lots of privileges.) Lists
channel number, status, and device. If it's a disk, you get the file
ID (not the file name). You can get the file's name by typing SHOW
DEVICE/FILES and guessing, or from the disk's index file by using
DUMP/FILE_HEADER/BLOCK=START:n disk:[0,0]INDEXF.SYS
The "n" corresponds roughly to the file's index offset in the file ID (so
that you would start searching for file (1234,5,0) using "n" equal to 1234
and go forth from there.) I imagine somebody out there can suggest a more
accurate way to find the file's header.
What these DON'T tell you is what block or record was most recently read or
written, or anything about the RMS file access method being used. Under some
conditions, it would also be useful to know what records are locked and by
whom.ZRPLIB3@DTUZDV5A.BITNET (Christoph D. Gatzka) (07/16/86)
You may also use the SDA> SET PROCESS/INDEX=... SDA> SET RMS ... SDA> SHOW RMS to get more detailed RMS information