How to use /proc

On Sun, Feb 5, 2012 at 11:07 PM, Surenkumar Nihalani [off-list ref] wrote:

Hello Guys,

I am CS student trying to write a kernel module as a part of my class
assignment. I wanted to know, from within kernel, how do I read and write
data to my proc file?
I need to store state from last call of my function.

Hello,

Have you tried searching on the internet? :D [1].

Another approach is to see how an existing proc
entry is handled. Look for example at /proc/sched_debug [2].

thanks,
Daniel.

[1] http://www.ibm.com/developerworks/linux/library/l-proc/index.html
[2] http://lxr.linux.no/linux+v3.2.4/kernel/sched_debug.c#L393