[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: mknod /dev/video0
Citerat från Orjan Friberg <firstname.lastname@example.org>:
> Markus Nilsson wrote:
> > There is noone! and i can't make one "manually" as bttv doc says
> > mknod /dev/video0 c 81 0
> > because I have no permission to write to "/dev" on dev-board.
> Actually, it's because the /dev directory (and most others) are
> > What do I got to do to make this character device file?
> The various device files are created by
> packages/devices/axis-2.4/Makefile, so you need to add something like:
> @$(MKNOD) -m 0666 $(DEV)/video0 c 81 0
> (You can create device files on the fly by placing them in /etc
> somewhere, but then you need to be able to specify the path to the
> device file to whatever program you're running.)
> Orjan Friberg
> Axis Communications AB
Ok, I got my /dev/video0 and also /proc/video.
But I can't open the video0 file after I connect my USB webcam.
The webcam appears in /proc USB fs but not in /proc video fs.
I'v got to mount /proc usbfs manually.
Do I have to do something similar with /proc video?
When I connect the USB webcam to my PC (same kernel) the character device looks like
crw------- 1 markus sys 81, 0 jan 1 1970 video0
and to dev board (connected or not)
crw-rw-rw- 1 root root 81, 0 Jan 1 1970 video0
I wonder about the group setting, sys and root? Important?