how to create node in Kernel space???

how to create node in Kernel space???

[Srinivasu_Garimella]

Hi All,

I am using 2.6.13 kernel . how to create node(ex : mknod /dev/FIFO c 253
0) in kernel space??
Please suggest me ..

Thanks & Regards
Garimella Srinivasu

-----Original Message-----
From: linux-hotplug-devel-admin@lists.sourceforge.net
[mailto:linux-hotplug-devel-admin@lists.sourceforge.net] On Behalf Of
Rod Keenan
Sent: Thursday, December 08, 2005 6:10 PM
To: linux-hotplug-devel@lists.sourceforge.net
Subject: udev and udevstart are no longer needed at all?



linux-hotplug-devel-request@lists.sourceforge.net wrote:

>Btw: I use udevd in initramfs now too and udev and udevstart are no
>longer needed at all. You know, I didn't like to start the daemon there
>in the first place, but killing udevd before leaving initramfs, after
>the rootfs is mounted, works nice and seems like a nice way to do it.
>
>Thanks,
>Kay
>  
>
Kay, I've been lurking on the list for a couple weeks now and appreciate
the info provided and all the effort everyone has put into developing
udev.

I've read all the udev docs I can find and am puzzled by the above.
Maybe
I've missed something important.

I'm developing an embedded system based on Gentoo, currently using
2.6.14-gentoo-r4 and udev-073, and would like the system to be pure
udev.
I'm starting udev early in the initrd/initramfs using the method
described
in udev-start.sh. I'm a little confused about what else I need to start
and in what order to get udev properly up and running. In the init
scripts
I'm starting hald, coldplug and hotplug early in the process.

Should I be starting the daemon, and if I do, should I be killing it,
and when?

Thanks,

Rod








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Re: how to create node in Kernel space???

[Kay Sievers]

On Thu, Dec 08, 2005 at 06:20:32PM +0530, Srinivasu_Garimella wrote:
> Hi All,
> 
> I am using 2.6.13 kernel . how to create node(ex : mknod /dev/FIFO c 253
> 0) in kernel space??
> Please suggest me ..

Simple, don't do. Never create files in userspace from inside the kernel.
Use something that triggers an event and let userspace create that file, or
just make sure it is always there, regardless of the kernel state.

Kay


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