Reading keys

Hi All,

I'm new to Linux kernel and actually subscribed to this list today. So, i'm not even sure is this the right place to ask this, but:

I want to make a kernel module which detects a keypress and then disables it. E.g someone presses F1 and my module would just "eat" it.

Any examples and/or hints where to start? Some nice, small peace of code would be very very nice.

Quoted 7 lines · Niko Rosvall

Hi All,

I'm new to Linux kernel and actually subscribed to this list today. So, i'm not even sure is this the right place to ask this, but:

I want to make a kernel module which detects a keypress and then disables it. E.g someone presses F1 and my module would just "eat" it.

Interesting usecase, is it for a kiosk? And why don't you disable the keys in X or your application?

Quoted 2 lines

Any examples and/or hints where to start? Some nice, small peace of code would be very very nice.

You could hack input_event() in drivers/input/input.c

Thanks,
Christoph

Quoted 12 lines · Christoph Fritz

Quoted 7 lines · Niko Rosvall

Hi All,

I'm new to Linux kernel and actually subscribed to this list today. So, i'm not even sure is this the right place to ask this, but:

I want to make a kernel module which detects a keypress and then disables it. E.g someone presses F1 and my module would just "eat" it.

Interesting usecase, is it for a kiosk? And why don't you disable the keys in X or your application?

Quoted 7 lines

Quoted 2 lines

Any examples and/or hints where to start? Some nice, small peace of code would be very very nice.

You could hack input_event() in drivers/input/input.c

Thanks,
Christoph

No, not for a kiosk or anything. Basically I'm just having fun here and trying to do a module which would disable caps lock key completely.

Of course I can do that using xmodmap, but where's the fun then? ;)

I did modify input.c (didn't test it yet thought), but what I really want is just a simple module so I can load and unload it when I want.