Re: Would like to add regular expressions to dbpr

[Benjamin Franksen <benjamin.franksen@helmholtz-berlin.de>]

Am Dienstag, 7. Mai 2013, 20:45:38 schrieb Andrew Johnson:
> On 2013-04-30 Zelazny, Michael Stanley wrote:
> > Motivation: Currently the SLAC electron beam line controls group uses an
> >
> >  IRMIS crawler to get PV information into the RDB by crawling every IOCs
> >  st.cmd.  Our engineers add new, but valid, syntax that results in us
> >  having to massage that crawler quite a bit.  I would like to add a
> >  command to all of our IOC startup scripts that generates a list of PVs
> >  and fields
> >
> >  that can easily crawled and inserted into the IRMIS RDB.  Example:
> > iocshCmd("dbpr(*,5,1) >/data/iocInfo/IOC.pvEveryField")
> >
> > Opinions?
>
> You can already use the command below on vxWorks to generate a .db file
> containing all the non-default design-time field values of all record
> instances currently loaded by the IOC:
>     dbDumpRecord(pdbbase,0,0) > all.db
>
> I think this should also work from RTEMS under CEXP, but iocsh doesn't have
> any way of passing a NULL as the second argument (the record type name
> string) which is currently necessary to dump all record types.  You'd have
> to issue one command for each record type to use this command from iocsh
> with existing versions of Base, although I will fix that to accept '*' or
> an empty string.

BTW, it is a trivial exercise to add that to an existing installation without
modifying base by wrapping the dbDumpRecord in a C function (passing it NULL
pointers) and exporting this C function to the shell using the standard tools
(epicsExport.h, iocsh.h). No need to wait for the next base release... ;-)

Cheers
--
Ben Franksen
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