Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Mon, 7 Oct 2013 16:27:31 -0700

On Oct 7, 2013, at 4:00 PM, Christian Pauly <[email protected]> wrote:

> Dear all
> thanks for all the nice suggestions how to solve my shell command problem.
> Of all presented solutions i like the "subroutine record" or the "StreamDevice" solution most.
> In both cases i have to implement a new iocsh function in C to do the system() call, as shown in the example from Emmanuel.
> 
> My iocsh does not support the system command (solution from Dirk), always says "command not found" if i try to type it in directly in the iocsh. I found something that i have to add "registrar(iocshSystemCommand)" to my database definition file (.dbd) to get the system command in iocsh, but somehow that does not work.
Did you include "system.dbd" in  your application?
The system iocsh command is provided only when requested. 

> 
> However, if i understand correctly: If i add a new command to the iocsh which then calls the C-function system(), then i anyway dont depend on the system command in iocsh right ?
> 
> My problem now:
> There was a nice example code posted by Emanuel, but i am quite a newby to EPICS and somehow dont figure out where to put this.
> My starting point is the example ioc application from the "EPICS Application Developers Guide" generated with the makeBaseApp.pl script.
> I can start the ioc (st.cmd), and can access the PVs using caget.
> 
> Where do i have to put the C-code with the definition of the new iocsh command now ?
> Do i have to change Makefiles somewhere to compile it ?
> And how do i define the corresponding "subroutine record" in my database .db file ?
> 
> Could you provide a bit more (basic) information ?
> I am using EPICS R3.14.12.3

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System