[etherlab-users] Call control executable as user without admin rights

[Martin Troxler]

On 02.04.2014 14:42, Matthias Liermann wrote:
>
> Hello,
>
> We use Etherlab 2.0 for the automation of a hydraulic test rig. We would like to give users without admin rights the 
> permission to execute control programs which have been built with the Simulink coder and the etherlab toolbox. We set 
> the udev rules from the etherlab documentation to allow user permission for the Ethercat device.
>
> KERNEL ==" EtherCAT [0 -9]*" , MODE ="0664" , GROUP =" users "
>
> When calling the executable we get the error message:
>
> mlockall() failed: Cannot allocate memory
>
> Setting SCHED_FIFO with priority 99 failed: Operation not permitted
>
> We can change the capability of the executable with setcap (sudo setcap cap_ipc_lock=ep  ./Test2ndOrderSystem). But 
> this doesn't help because we need administrator rights to change that too.
>
> Thank you, Matthias Liermann
>
Hi,

Add your user to a group 'realtime', then add a file 'realtime_limits.conf' to /etc/limits.d containing
@realtime - rtprio 99
@realtime - memlock unlimited

You can also specify a user in a limits.conf file by omitting the @ sign.

Regards
Martin


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Thank You.
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