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    SubjectRe: [PATCH 1/1] V4L: stk11xx, add a new webcam driver
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    > > This seems to be an interesting approach.
    > >
    > >
    > Interesting but impossible to do for ioctl calls.
    > When the application does a ioctl(fd_of_mnt_video0,VIDIOC_G_FMT,&arg)
    > for example, there is no way for the userspace helper to catch this ioctl.
    > The application could only open/read from the userspace helper's file
    > /mnt/video0.
    > ioctl would still have to be done on the kernel device driver.
    > I thought also about a /proc interface for decompression algorithms (a
    > helper would listen on a /proc file and write on another /proc file) but
    > /proc is not designed for that kind of thing.
    > A separate library seems to be the simplest solution.

    There are some ways for this to work. For example, you may create a
    helper device for the daemon driver to bind, even requiring it to have
    root permission.

    --
    Cheers,
    Mauro

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