Path: utzoo!utgpu!water!watmath!clyde!rutgers!gatech!bloom-beacon!tut.cis.ohio-state.edu!uwmcsd1!ig!agate!ucbvax!ANDREW.CMU.EDU!jj1h+
From: jj1h+@ANDREW.CMU.EDU (Joseph Jackson)
Newsgroups: comp.os.vms
Subject: RE: Testing for a node
Message-ID: <EWFJ8jy00WA9474XZc@andrew.cmu.edu>
Date: 21 Mar 88 17:26:07 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 31


I was recently working on a DCL procedure and needed to see if a node
was available enough to let me access various files on its system
disk.  I recalled this quick and nifty method that a manager once
showed me.  If a node is there, then you can expect to find this file:

nodename::DUA0:[000000]000000.DIR

That is, the root directory file on the disk DUA0:.  This is the line
that I used to assign a "boolean" DCL symbol used as the condition of
a later IF statement:

Node_down = F$Search ("''Nodename'::DUA0:[000000]000000.dir") .eqs. ""

This assumes that every DECnetted machine has a disk called DUA0:.
Hopefully, I'm not completely off-base in this respect!


Joe Jackson.  ;-)


      ___________________________________________________________
     |                                                           |
     |                  Joseph L. Jackson, Jr.                   |
     |                Carnegie-Mellon University                 |
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