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<== Date ==> <== Thread ==>

Subject: ENVVAR.right_trim in IOC console
From: "Jemian, Pete R. via Tech-talk" <tech-talk@aps.anl.gov>
To: EPICS Tech Talk <tech-talk@aps.anl.gov>
Date: Mon, 30 Sep 2019 01:35:31 +0000
Working in the IOC shell (EPICS base 7.0.3), how to remove the last 
character from an EPICS environment variable?

given this definition:   epicsEnvSet(PREFIX, "xxx:")
I want to achieve this result: "xxx" by somehow editing $(PREFIX) in place.

In bash, this is possible using ${PREFIX::-1} but in the IOC shell:

iocxxx> echo $(PREFIX::-1)
macLib: macro PREFIX::-1 is undefined (expanding string echo $(PREFIX::-1))


The context is I want to change this line from:

dbLoadRecords("some.db","IOCNAME=$(PREFIX)")

to:

dbLoadRecords("some.db","IOCNAME=$(PREFIX - 1 character)")

-- 
----------------------------------------------------------
Pete R. Jemian, Ph.D.                 <jemian@anl.gov>
Beam line Controls and Data Acquisition (BC, aka BCDA)
Advanced Photon Source,    Argonne National Laboratory
Argonne, IL  60439                    630 - 252 - 3189
-----------------------------------------------------------
       Education is the one thing for which people
          are willing to pay yet not receive.
-----------------------------------------------------------



Replies:
Re: ENVVAR.right_trim in IOC console Michael Davidsaver via Tech-talk
Re: ENVVAR.right_trim in IOC console Till Straumann via Tech-talk

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