Re: [Linux-uvc-devel] [SVN] Added preliminary pan/tilt support for Quickcam Orbit MP

[michel X. <mx...@ma...>]

Le Lundi 6 Février 2006 21:56, Laurent Pinchart a écrit :
> > Well another question I use :
> > int err =0;
> >     queryctrl->id = control;
> >     if ((err= ioctl(vd->fd, VIDIOC_QUERYCTRL, queryctrl)) < 0) {
> > 	printf("ioctl querycontrol error %d \n",err);
> > to verify the control V4L2_CID_PANTILT_RESET  exist
> >  for some strange reason the ioctl return -EPERM ?
>
> Print errno instead of err. ioctl() returns -1 (== -EPERM) in case of
> failure. The error code is stored in errno.
>
> Laurent Pinchart

errno is set with  EIO 
-- 
Michel Xhaard
http://mxhaard.free.fr