Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 20 Feb 2014 10:26:03 -0600

On 02/20/2014 07:21 AM, Mark Rivers wrote:
> You can run Linux commands from st.cmd with the "system" command:
> 
> system "echo 113 > /sys/class/gpio/export"
> 
> However, the iocsh "system" command is not enabled by default for security reasons.
> This is from the IOC Application Developers Guide:
> 
> ***************************************************
> system command_string
> Send command_string to the system command interpreter for execution. This command is present
> only if some application database deﬁnition ﬁle contains registrar(iocshSystemCommand)
> and if the system provides a suitable command interpreter (vxWorks does not).
> ***************************************************

You can enable the system command in your IOCs by adding the system.dbd
file to the list of DBD files built into the IOC. It contains the
registrar command described above.

- Andrew
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System