Experimental Physics and Industrial Control System
Thanks for the feedback. I agree this type of editing is beyond the
current design. I'm looking at the luash recently added as a possibility.
Pete
On 2019-09-29 10:35 PM, Till Straumann wrote:
> 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)")
>>
>
--
----------------------------------------------------------
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
-----------------------------------------------------------
Education is the one thing for which people
are willing to pay yet not receive.
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