Prevent a process from opening a file more than once

Mulyadi Santosa mulyadi.santosa at
Tue Sep 27 20:22:22 EDT 2011

Hi :)

On Wed, Sep 28, 2011 at 06:56, Venkatram Tummala <venkatram867 at> 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?


Mulyadi Santosa
Freelance Linux trainer and consultant


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