On Fri, Sep 23, 2005 at 11:06:43AM +0300, Hakan Avci wrote:
> Jan,thank u very very very.... much,I eat my head for this problem(we 
> say in Turkey) :) .
> 
> So I have a question(actually a problem).is lock a file while second 
> person looking that file?? Am I explain?

There is not really a lock file or lock on the device. However our
kernel module only allows a single process to open it. If the device is
considered 'in-use' the kernel returns an EBUSY error.

It is quite useful, this way the kernel knows that any message to or
from userspace always ends up with the same process.

Jan