On Tue, Sep 27, 2011 at 5:22 PM, Mulyadi Santosa <mulyadi.santosa@gmail.com> wrote:

Hi :)

On Wed, Sep 28, 2011 at 06:56, Venkatram Tummala <venkatram867@gmail.com> wrote:
> Hi All,
> I have a simple device driver which creates a /dev/XYZ file. I need to
> prevent a process from opening the file more than once. However, multiple
> processes can open the file simultaneously. Is there any any elegant way to
> do this other than checking all opened files in the process ?

Uhm, keep a reference count and increment it on every file open in
your module? How does that sound?

Well, which refcount should i use? I can't use the refcount in the file object as the file objects passed to me are different each time the file is opened in the process.

--
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com