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