device permissions

lowebb · 03-08-2006, 04:37 PM

Hi,

I'm running FC4 and have a DVB TV card device. It works great under user root but I would prefer it to be a non admin user account. Currently on boot the UID and GID are 'root' but because of mplayer and xine I cannot access this device under user freevo.

I've altered the '/etc/udev/rules.d/50-udev.rules' to

KERNEL=="dvb/*", GROUP="freevo", MODE="0660"

(it originally didnt have the group command)

but it still creates this device to user root on a reboot?

I cant work out why and need any help anyone can give. Thanks very much in advance

jomen · 03-11-2006, 04:25 AM

If you want to use custom/your own rules, they should go in another file which is called before the 50-udev.rules are applied.
As an example: my file is: 10-udev-my.rules
and that's whats in it:

Code:

cat 10-udev-my.rules
KERNEL=="rfcomm[0-9]*", NAME="%k", GROUP="dialout", MODE="0660"

If it helps - I have a different rule for dvb in 50-udev.rules - probably a different version of udev...

Code:

# dvb devices
SUBSYSTEM=="dvb", PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s $${K%%%%.*} $${K#*.}'", NAME="%c", GROUP="video"

but I don't have such device...

lowebb · 03-14-2006, 03:29 AM

So 10-udev-rules is automatically called before 50-udev-rules?

I'll give this a go tonight

Thanks

jomen · 03-14-2006, 04:26 AM

Yes for the first point. And it's not altered by any rules that might come afterwards.
A quote from a tutorial

Quote:

Files in /etc/udev/rules.d/ are parsed in lexical order. udev will stop processing rules as soon as it finds a matching rule in a file for the new item of hardware that has been detected. It is important that your own rules get processed before the udev defaults, otherwise your own naming schemes will not take effect! I suggest that you keep your own rules in a file at /etc/udev/rules.d/10-local.rules (this doesn't exist by default - create it). As 10 comes before 50, you know that your rules will be looked at first. It is important that the filenames of your rule files end with the .rules suffix, otherwise they will not be used.