Le 07/11/2016 à 11:18, Simon Fels a écrit : > On 07.11.2016 08:53, Didier Roche wrote: >> Le 06/11/2016 à 11:50, Jacques Supcik a écrit : >>> Dear community. >>> >>> I have a program <https://gitlab.com/telecom-tower/tower>, written in >>> go, and running on a raspberry Pi 2, which displays messages on a LED >>> panel. The panel <https://www.adafruit.com/product/2294> is made of >>> "neo pixels" and is connected to the GPIO of the raspberry Pi. >>> Internally, it uses the DMA and PWM to generate and accurate signals. >>> >>> The program currently runs well on a Raspbian system and I would like >>> to move to ubuntu-core. I was able to build the snap and to deploy it >>> on a raspberry Pi 2 running Core version 16. I installed the snap with >>> "--dangerous", but as soon as the system configure the DMA/PWM/GPIO, >>> it just freezes. >>> >>> I installed snappy-debug to check the logs and this is what I get: >>> >>> = AppArmor = >>> Time: Nov 6 09:28:45 >>> Log: apparmor="DENIED" operation="open" >>> profile="snap.telecom-tower.daemon" name="/dev/vcio" pid=4441 >>> comm="tower" requested_mask="r" denied_mask="r" fsuid=0 ouid=0 >>> File: /dev/vcio (read) >>> >>> = Seccomp = >>> Time: Nov 6 09:28:45 >>> Log: auid=4294967295 uid=0 gid=0 ses=4294967295 pid=4441 comm="tower" >>> exe="/snap/telecom-tower/x1/bin/tower" sig=31 arch=40000028 14(mknod) >>> compat=0 ip=0x76e3aaf6 code=0x0 >>> Syscall: mknod >>> >>> Note that if I scp the binary file and run on ubuntu core as root, >>> then the program runs fine. (I don't install the snap, I just run the >>> binary from the home directory.) >>> >>> Does someone have an idea about what I can do to make my snap run? >>> >>> Thank you very much in advance for your support. >> Hey Jacques, >> >> I think we did discuss about GPIO support in confined mode, but there is >> no interface for this today AFAIK (CCing Jamie who can confirm and maybe >> give a path/ETA forward). > > There is a GPIO interface. The downside of it is that you need a slot > defined on the gadget snap. As long as this isn't done for the official > gadget snaps for Pi 2/3 you can only build your own. See > https://github.com/snapcore/snapd/blob/master/interfaces/builtin/gpio.go > for details about the interface itself.
Ah nice, I didn't find any documentation on it nor in the official doc (which was imported from the snapd repo before its removal) or in https://github.com/snapcore/snapd/wiki/Interfaces. Any plan on documenting it? Is there a bug report for ogra to enable it in the official gadget snaps for Pi 2/3? Cheers, Didier -- Snapcraft mailing list Snapcraft@lists.snapcraft.io Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/snapcraft
