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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: ENVVAR.right_trim in IOC console |
| From: | Till Straumann via Tech-talk <[email protected]> |
| To: | "Jemian, Pete R." <[email protected]>, EPICS Tech Talk <[email protected]> |
| Date: | Sun, 29 Sep 2019 20:35:54 -0700 |
It would probably be easy to wrap std:: or boost:: regex_replace() into a iocsh call with, e.g., 'sed'-like syntax so that you could say epicsEnvSetSubstituted( "IOCNAME", "/(^.*)(.$)/\1/", "$(PREFIX)" ) that would give you a quite powerful tool... HTH - Till On 9/29/19 6:35 PM, Jemian, Pete R. via Tech-talk wrote:
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)")