udev permissions on /dev/dvb (docker)

frozenfrozen

(this is all on debian 9)

Hi,

The real problem I'm trying to solve: Passing /dev/dvb to tvheadend in docker. If I can achieve that without any of the following messing I'd be really happy. Below is my best guess at how I should solve this but it could be completely the wrong direction


current temporary solution, 'chown -R user:user /dev/dvb' as root after each restart. Works perfectly.

root@debian:/etc/udev/rules.d# ls -l /dev/dvb
total 0
drwxr-xr-x 2 user user 120 Sep 13 16:17 adapter0

since the above works, trying to give 'user' persistent ownership of /dev/dvb is what I think I want to achieve.

#/etc/udev/rules.d/10-dvb.rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", MODE:="0660", OWNER="user", ENV{ID_SOFTWARE_RADIO}="1"

this is good(?)

user@debian:~$ ls -l /dev/dvb/adapter0/
total 0
crw-rw---- 1 user video 212, 0 Sep 13 16:17 demux0
crw-rw---- 1 user video 212, 1 Sep 13 16:17 dvr0
crw-rw---- 1 user video 212, 3 Sep 13 16:17 frontend0
crw-rw---- 1 user video 212, 2 Sep 13 16:17 net0

but this needs the same permissions as when I chown above

user@debian:~$ ls -l /dev/dvb/
total 0
drwxr-xr-x 2 root root 120 Sep 13 16:17 adapter0

so the question itself, how do I give ownership to /dev/dvb to a user persistently

been stuck on it all day and no amount of reading mailing lists from 2005 will help me


I have tried passing /dev/dvb/adapter0:/dev/dvb/adapter0 rather than just /dev/dvb:/dev/dvb to the docker container but this doesn't work. that would solve my issue as adapter0's contents have the right ownership at the moment. (TVH just doesn't see the adapter with this method)
The tabs I still have left open from looking for answers as well as getting help from a few relevant irc channels.. no luck D;
http://www.reactivated.net/writing_udev_rules.html#ownership
https://support.rackspace.com/how-to/checking-linux-file-permissions-with-ls/
http://www.cruisersforum.com/forums/archive/index.php/t-102929.html
http://www.instructables.com/id/rtl-sdr-on-Ubuntu/
https://www.mythtv.org/wiki/Device_Filenames_and_udev
https://tvheadend.org/boards/4/topics/7109
https://unix.stackexchange.com/questions/147494/how-can-i-set-device-rw-permissions-permanently-on-raspbian
http://lists.mythtv.org/pipermail/mythtv-users/2005-December/112472.html
http://www.jpichon.net/blog/2011/12/debugging-udev-rules/

This works after the chown -R user:user /dev/dvb

root@debian:/etc/udev/rules.d# cat /opt/docker-compose.yml
---
version: '2'
services:
  tvheadend:
    image: linuxserver/tvheadend
    container_name: tvheadend
    volumes:
      - /opt/appdata/tvheadend:/config
      - /mnt/storage:/data
    network_mode: host
    restart: always
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
    devices:
      - /dev/dvb:/dev/dvb/

Johnboy1951

I wonder if changing the rtl rule to this would have any effect?

SUBSYSTEMS=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2832", MODE:="0666", ENV{ID_SOFTWARE_RADIO}="1"

I cannot recall exactly why, but I had to change that from 0660 to 0666 some time ago.

frozenfrozen

Just tried that now, permissions of the file are now:

root@debian:/home/user# ls -l /dev/dvb/
total 0
drwxr-xr-x 2 root root 120 Sep 13 18:15 adapter0
root@debian:/home/user# ls -l /dev/dvb/adapter0/
total 0
crw-rw-rw- 1 user video 212, 0 Sep 13 18:15 demux0
crw-rw-rw- 1 user video 212, 1 Sep 13 18:15 dvr0
crw-rw-rw- 1 user video 212, 3 Sep 13 18:15 frontend0
crw-rw-rw- 1 user video 212, 2 Sep 13 18:15 net0
root@debian:/home/user#

running docker-compose up using /dev/dvb/adapter:/dev/dvb/adapter - now working

Many thanks johnboy.

A clean boot of the virtual machine is now bringing up a working tvheadend instance.. :cool:

Johnboy1951

frozenfrozen wrote: »

Just tried that now, permissions of the file are now:

root@debian:/home/user# ls -l /dev/dvb/
total 0
drwxr-xr-x 2 root root 120 Sep 13 18:15 adapter0
root@debian:/home/user# ls -l /dev/dvb/adapter0/
total 0
crw-rw-rw- 1 user video 212, 0 Sep 13 18:15 demux0
crw-rw-rw- 1 user video 212, 1 Sep 13 18:15 dvr0
crw-rw-rw- 1 user video 212, 3 Sep 13 18:15 frontend0
crw-rw-rw- 1 user video 212, 2 Sep 13 18:15 net0
root@debian:/home/user#

running docker-compose up using /dev/dvb/adapter:/dev/dvb/adapter - now working

Many thanks johnboy.

A clean boot of the virtual machine is now bringing up a working tvheadend instance.. :cool:

Glad it did what you needed
(I was not at all sure)

niallb

Had you tried adding the 'user' user to the 'video' group?

usermod -G video user

opus

niallb wrote: »

Had you tried adding the 'user' user to the 'video' group?

usermod -G video user

That's what I've done at work to allow people access serial ports in the past, different device name obviously.

frozenfrozen

Before I was trying to make this device persistently mounted at something like /dev/dvb/adapter101 but couldn't manage to do that

Reason for that was so when I added other devices they would all be consistently adapter101,102,103 etc rather than potentially swapping their order when being automatically assigned to adapter0,1,2,3 on boot

when that didn't work that led me to adding the OWNER within udev.rule which I was already messing with for the above.

Adding that group to my user would have been a much easier fix from the start to achieve the same thing, thanks.