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

[Mike O'Connor]

This method is not 100% secure but.

Set the program to be able to run via sudo as root and then have it drop
its privileges once running.

Mike

On 2/04/2014 11:12 pm, 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
>
>  
>
>  
>
>  
>
> Assistant Professor
>
> American University of Beirut <http://aub.edu.lb/>
>
> Department of Mechanical Engineering
> <http://www.aub.edu.lb/fea/me/Pages/default.aspx>
>
> Personal Homepage <http://staff.aub.edu.lb/%7Eml14/Homepage/>
>
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