Keyboard scanning in linux kernel space

floflette · 07-20-2004, 04:26 AM

Hi!

I'm a little newbie in the linux kernel programming world...

I have to develop a kernel module interacting with the user: to do so, it has to scan from the keyboard...
I know that I can't use the 'fscanf' function, and I saw in 'linux/kernel.h' that I can use 'vsscanf' and 'sscanf' functions... but I don't know how...

Does anybody know about this???

Thanks!

Hko · 07-20-2004, 08:09 AM

It's not just that easy to make the kernel read from the keyboard. The kernel doesn't have a "stdin", and it cannot use libc functions, and the kernel does not have a scanf(). The sscanf() and vsscanf() provided in the kernel can only read from strings, just like the libc-implementations of those functions.

Also having a kernel take data from the keyboard would create a security hole. Or is that exactly what you're trying to make?

floflette · 07-20-2004, 09:45 AM

Of course not, my aim is not to create a security hole in my system...................
I just want to develop a test module for a driver module i made... I would like this test module to interact with the user, by the way of a menu in which the user could choose which item to test....

It seems to be much complicated, and, in addition, not secure... So maybe it would be better to use only module parameters, and to make something not very user-friendly....

Thank you anyway.....

infamous41md · 07-20-2004, 12:43 PM

if you want, u can do anything, but i'd use module params instead. however, if u must, here is one way to make sys calls in kernel space: http://www.linux.it/kerneldocs/ksys/ksys.html