Re: How to detect USB camera disconnection?

[Jean-Francois Moine <moinejf@xxxxxxx>]

On Thu, 20 Aug 2009 13:54:26 -0300
"Nilo Roberto C Paim" <nilopaim@xxxxxxxxx> wrote:

> I've a Vimicro USB cam that I'm constantly pooling for taking
> snapshots using an application made by me. How can I programmatically
> detect when the cam is disconnected?
> 
> It seems to me that V4L "thinks" that the cam is still there, even
> with the cable disconnected.
> 
> --- >  I'd forgot to say: the driver I'm using is gspca, last
> version. Works like a charm. My problem is related to cable's cam
> disconnected.

Hi Nilo,

I don't know how you poll. Normally, when the webcam is disconnected,
the I/O calls should fail with errno = NODEV.

Cheers.

-- 
Ken ar c'hentañ	|	      ** Breizh ha Linux atav! **
Jef		|		http://moinejf.free.fr/

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