Red Hat Bugzilla – Bug 489738
broken saned (non-root) authorization to access scanner device on server
Last modified: 2013-03-05 22:58:00 EST
Description of problem:
I can't get access to my scanner device as non-root user using "proper" PolicyKit/ConsoleKit authorizations. A possible issue that affects this problem is that I run at init level 5 (gui), but gdm doesn't start because of a separate using-vesa-driver-for-my-radeon-graphics-card issue. I filed this under PolicyKit, but ConsoleKit might have some relevance, too. The purpose of all my effort is to get saned authorization to access my scanner as a non-root user so I set up network scanning support.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Get scanner setup so that `scanimage -L` as root user reports scanner.
2. `scanimage -L` as non-root (eherget) user doesn't find scanner.
3. Issue any/all of the following commands:
polkit-action --set-defaults-inactive org.freedesktop.policykit.grant yes
polkit-action --set-defaults-any org.freedesktop.policykit.grant yes
polkit-auth --user eherget --grant org.freedesktop.hal.device-access.scanner
4. reboot after issuing any/all the above commands
5. `scanimage -L` as eherget (non-root) still doesn't find scanner, while root user can
6. changing ownership on the usb device (in my case /dev/bus/usb/002/002 to user 'eherget' results in `scanimage -L` working for user eherget. Oddly, changing group ownership to my user's primary group while leaving the device owned by user root still prevents `scanimage -L` from finding the scanner. Permissions on the device are "crw-rw-r--+".
`scanimage -L` can't find/access the scanner device as non-root user without changing actual ownership on the device.
users authorized by the various polkit-action and polkit-auth commands should have access to the scanner device (yes, I rebooted after all attempts to change authorization with the polkit commands). Ultimately, only the polkit-auth command should be necessary to enable a non-root user on a headless server system to access a scanner device.
As I mentioned, I have init level set to 5, but gdm doesn't start because of a separate issue. I would hope this has no bearing on this issue, but some of the issues I was able to find while researching this on the net might imply otherwise. On a true headless server (init level 3) ConsoleKit should have no relevance as ck-xinit-session should not be getting executed.
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