device node created using mknod dissapear after reboot

minike · 12-13-2006, 11:49 AM

I'm trying to make a webcam work under my slack10.2/2.6.18
In fact is a so cheap cam, that it doesn't even have any label.
I discover that the driver (probably) is the sn9c102.
the point is that, according to:
http://howtos.linux.com/howtos/Webcam-HOWTO/index.shtml
if I don't have a /dev/video0 node, I have to create it with
mknod.
coz I don't have it, I follow such recipe with the commands:

Code:

mknod /dev/video0 c 81 0;chown root.users /dev/video*;chmod g+rw /dev/video0

but xawtv continue complainin' there's no /dev/video0 device.
So, I reboot waiting the new node becomes 'visible' to the system.. but when I do so, /dev/video0 doesn't exist anymore! It disappear after rebooting. is that normal? am I forgetting any command?

any idea what's wrong, or what should I do to have an operating video device node?

thanks in advance

TSquaredF · 12-13-2006, 12:27 PM

minike,
It depends on whether you are using a 2.6 series kernel & udev on your 10.2 install. If you are using udev, it repopulates /dev with every boot. You would have to research udev (see recent-state-of-udev & writing_udev_rules) and write a udev rule for your camera. Edit: Pay particular attention to permissions.
If you are using a 2.4 series kernel, thus no udev, I don't know what may be going on.
Regards,
Bill

minike · 12-13-2006, 05:12 PM

thanks, TSquaredF !
gonna go in that direction