Experimental Physics and
Industrial Control System

Angus Gratton <[email protected]> · Wed, 13 Oct 2010 10:19:31 +1100

Is it possible to call subscripts from a parent iocsh script? ie 

# other ioc commands go here
epicsEnvSet MY_ENV A
iocsh mychildscript.cmd
epicsEnvSet MY_ENV B
iocsh mychildscript.cmd
# more ioc commands go here

This seems like it should be possible, but the app dev guide has left me
drawing a blank. The "iocsh <script>" command that's available in
VxWorks would do it, but it isn't available on RTEMS.

I was thinking of writing a thin wrapper around the C function iocsh()
and exporting that, but that seems like it might not work if it is not
available now.

Particularly, I'm keen to do is pass the parent environment context to
the child. Is that possible?

***

Explanation: The reason that I want to do this is that I have two banks
of Group 3 DI interfaces that are both configured identically on
separate loops, ie my .cmd initialisation code has:

initGP3TypeD L1D0B1, L1, 0, 1
initGP3TypeD L1D0B2, L1, 0, 2
initGP3TypeD L1D0B3, L1, 0, 3

initGP3TypeD L2D0B1, L2, 0, 1
initGP3TypeD L2D0B2, L2, 0, 2
initGP3TypeD L2D0B3, L2, 0, 3

(for around 15 init statements each)

and I'd like to be able to do:

initGP3TypeD ${LOOP}D0B1, ${LOOP}, 0, 1
initGP3TypeD ${LOOP}D0B2, ${LOOP}, 0, 2
initGP3TypeD ${LOOP}D0B3, ${LOOP}, 0, 3

... and then call that script file twice with environment variable
LOOP=L1 and LOOP=L2, to save on copy-paste.

- Angus

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System