Re: [foxboro] Getting logical name in a shell script

I like the /etc/msgln approach suggested by Kathy, but I thought you
might like to know a little about how to access GCNAME and other DM
variables.


---------------------------------


GCNAME is a DM global, but it is not an OM Shared Variable. Many, but
not all DM globals are also OM Shared Variables and can be read using
omget.

If the DM global is an OM SV, you can read it using omget. For example,
if the DM is 2DM51E, you can get the current environment name by typing:

omget 2DM51EENV

or

pref -2DM51E ENV


However, DM variables - like GCNAME - that are not OM SVs cannot be read
this way. They are accessible only in DM scripts and commands.

For example, if you are launching your shell script from a DM button,
you could do this:

dmcmd run /opt/myScripts/testScript $GCNAME

or you could run a DM script first that invokes your script:


dmcmd script /opt/myDMscripts/testDMScript


The contents of /opt/myDMscripts/testDMScript might be:

dmcmd script
= P1 $GCNAME
dmcmd script /opt/myScripts/testScript $DMNAME


where the contents of /opt/myScripts/testScript would be:

#!/bin/sh
...
DMNAME=$1

GCNAME=`${DMNAME}P1`


At that point, GCNAME in your script would have the value that you want.

Regards,
 
Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (desk)
713 329 1600 (operator)
713 329 1944 (SSC Fax)
713 329 1700 (Central Fax)
alex.johnson@xxxxxxxxxxxxxxxx



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