Which snap interface allows accessing /dev/rfkill?

[Simon Fels]

On 19.01.2017 10:41, Tonny Tzeng wrote:
> Hi,
> 
> I'd like to unblock the Bluetooth interface on Ubuntu Core, so I use
> 'stage-packages' keyword to install 'rfkill' package to my snap. If I
> install the snap in devmode, the rfkill command works as expected. But
> if the snap is installed in confined mode, I always get 'Permission
> denied', and the /var/log/syslog shows below message:
> 
> Jan 19 09:17:42 localhost kernel: [177262.419927] audit: type=1400
> audit(1484817462.015:2031): apparmor="DENIED" operation="open"
> profile="snap.iotivity-smarthome-demo.rfkill" name="/dev/rfkill"
> pid=14430 comm="rfkill" requested_mask="r" denied_mask="r" fsuid=1001 ouid=0
> 
> Would anyone help me which interface should I declare with the plugs
> keyword?  I've tried hardware-observe and bluetooth-control interfaces
> but no success. Any pointers would be appreciated, thanks in advance.

The 'network-control' interface should do the job for you. See
https://github.com/snapcore/snapd/blob/master/interfaces/builtin/network_control.go#L94

regards,
Simon