How can i pass content of a file to /proc/

[gandil]

I wonder about how can i take input from user write to a file then pass file content to /proc file.

For example my device file is DFILE under /dev,
user will enter

echo "this is my try" > /dev/DFILE

After that user will enter

cat /proc/NEWD

Then user should saw what we write.

Any idea?

[wje_lf]

That's not really what the /proc directory is for. For details on what it's for, go here.

What is it you ultimately want to do?

[Franklin52]

You have to learn how to program a device driver, this is a useful link to a free book in pdf:

http://tldp.org/LDP/lkmpg/2.6/lkmpg.pdf

Chapter 5.2 discusses how to read and write to a proc file.

Regards

[wje_lf]

Franklin52, I had no idea. This is quite interesting. (I'm not a device driver kinda guy, not yet anyway.)

Thanks! :)

[gandil]

so how can i pass /dev/MYDEV information to /proc/MYDEVICE ?

[Cabhan]

The PDF that Franklin listed contains information on setting up a /dev entry and a /proc entry. Combine the two. This way, when the dev entry is written to, you store that into a buffer, and when the proc entry is read from, you output that buffer.

Easy peasy.

[gandil]

thank you.