non-root user camera access using gtkam?

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Date: Fri, 30 Apr 2004 12:51:33 +0100

Argh! I'm drowning in a sea of information here :-)

I want to be able to access my digital camera as a non-root user using
gtkam - I've managed to get it working as root, so there's obviously a
permissions problem.

Doing a web / usenet search it seems like everyone has their own favourite
suggestion for doing this, and that there's no particular standard
for usb device access.

So, here's my setup:

  System is RH9, kernel 2.4.20, gtkam 0.1.7.
  I have the hotplug binary installed,
  /proc/sys/kernel/hotplug points to the right binary,
  /proc/bus/usb/* is present
  /etc/hotplug/usb.usermap is present
  /etc/hotplug/usb/usbcam is present
  /var/run/console.lock contains the user that I'm logged in as
    at the machine.

Piecing together scraps of documentation and comments in scripts, it seems
that should work. However, I see nothing when running gtkam as a non-root
user; no error and no evidence of it detecting the camera. When run as
root everything works fine.

I'm obviously missing another step - possibly tweaking usb permissions
under /dev/usb? But I thought hotplug was supposed to avoid the problem of
needing to give a user access to *any* usb device.

Can anyone:

  a) suggest what else I'm missing / doing wrong, or
  b) point me at a FAQ which explains this from start to finish, using
  hotplug? It must be a common enough problem, after all...

cheers

Jules

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