Experimental Physics and Industrial Control System
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Subject: |
ENVVAR.right_trim in IOC console |
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From: |
"Jemian, Pete R. via Tech-talk" <[email protected]> |
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To: |
EPICS Tech Talk <[email protected]> |
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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. <[email protected]>
Beam line Controls and Data Acquisition (BC, aka BCDA)
Advanced Photon Source, Argonne National Laboratory
Argonne, IL 60439 630 - 252 - 3189
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Education is the one thing for which people
are willing to pay yet not receive.
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