How to use /proc

[Surenkumar Nihalani]

Hey Daniel, 

Thanks for the quick reply.

The IBM tutorial helps me writing the function for handling user reads and writes to your corresponding proc file. It doesn't help in terms of opening
and writing from the kernel side.
the example you provided just creates a proc entry. It doesn't tell me how to write to it.

Please help.

Thanks,
Suren Nihalani.

----- Original Message -----
From: "Daniel Baluta" <daniel.baluta at gmail.com>
To: "Surenkumar Nihalani" <suren at gatech.edu>
Cc: Kernelnewbies at kernelnewbies.org
Sent: Sunday, February 5, 2012 4:20:28 PM
Subject: Re: How to use /proc

On Sun, Feb 5, 2012 at 11:07 PM, Surenkumar Nihalani <suren at gatech.edu> 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