Minor numbers under 2.6

Hi,
Can somebody clarify a question that i have ?

Say under 2.4 kernel, char device drivers had a minor number of int. In the
2.6 kernels, this number was increased to 20 bits from 8 bits. Under 2.6 i could use "mknod -c major, minor".

How can i achieve something similar with 2.6 taking into consideration that i
have to create more than 255 minors ?

The same way:

	# mknod foo c 100 10000
	# ls -l foo 
	crw-r--r--  1 root root 100, 10000 Jun  2 07:48 foo

Quoted 8 lines · Greg KH

The same way:

	# mknod foo c 100 10000
	# ls -l foo 
	crw-r--r--  1 root root 100, 10000 Jun  2 07:48 foo

Under 2.6.7-rc2-mm1 :
root@Starbuck:/home/tyler>mknod /dev/test c 100 1000 root@Starbuck:/home/tyler>ll /dev/test crw-r--r-- 1 root root 103, 232 Jun 2 17:07 /dev/test

and under 2.4.26 that's the same.

Quoted 9 lines · Manu Abraham

Hi,
Can somebody clarify a question that i have ?

Say under 2.4 kernel, char device drivers had a minor number of int. In
the 2.6 kernels, this number was increased to 20 bits from 8 bits. Under 2.6 i could use "mknod -c major, minor".

How can i achieve something similar with 2.6 taking into consideration
that i have to create more than 255 minors ?

The same way:

	# mknod foo c 100 10000
	# ls -l foo
	crw-r--r--  1 root root 100, 10000 Jun  2 07:48 foo

Just make sure you have a up to date glibc.

Hope this helps,

greg k-h

Just make sure you have a up to date glibc.