[arch-general] udev-139 and file permissions of /dev/net/tun

[Aaron Griffin]

On Tue, Mar 10, 2009 at 12:51 PM, Attila <attila at invalid.invalid> wrote:
> Hi,
>
> i use a script to prepare a bridged network for a kvm session and therefore i
> have this line in /etc/udev/rules.d/01-attila.rules:
>
> KERNEL=="tun", NAME="net/%k", MODE="0660", GROUP="network"
>
> After upgrading udev my file permissions of the new persistent /dev/net/tun
> looks so after booting up:
>
> crw-rw-rw- 1 root root 10, 200  8. Mär 00:43 /dev/net/tun
>
> I play with this lines in /etc/udev/permissions.d/00-my.permissions:
>
> a) tun:root:network:0660
> b) net/tun:root:network:0660
>
> I reboot even after changing the line but there is no change. If i do
> a "modprobe tun" there be the right permissions:
>
> crw-rw---- 1 root network 10, 200  8. Mär 00:43 /dev/net/tun
>
> So my questions is how and/or where can i control the file permissions of the
> persistent devices from the new udev?
>
> This is definitly not bad, i want more to know what i have overseen.-)

tun and a few other devices (loopX) are created statically in
/lib/udev/devices/ and then placed on top of /dev/ when udev starts
up. You can modify the initial permissions of these devices there