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Forum Discussion
Duo: Sharing a scanner using Sane
I've just set up my Duo to provide shared access to an Epson Perfection 1650 scanner using Sane. Previously the scanner was connected to my daughter's PC which was off or in use whenever anyone wanted...
For reference, my issue was down to the saned user not having permissions set correctly on the USB device. Steps to fix as follows:
(from the terminal, as root) run scanimage -L
Result will be along the lines of: device `niash:libusb:002:002' is a Hewlett-Packard ScanJet 3300C flatbed scanner - the two numbers after libusb are important
Find the USB directory at /proc/bus/usb/
The scanner device access depends on the saned user being able to access the locations within the folder structure corresponding to those two numbers above
In my case the numbers were 002:002, so the folder structure was /proc/bus/usb/002/002
To grant access I followed advice from here: http://penguin-breeder.org/sane/saned/
In my case I typed the following:
$ chown root:saned /proc/bus/usb/002 && chmod g+rw /proc/bus/usb/002
$ chown root:saned /proc/bus/usb/002/002 && chmod g+rw /proc/bus/usb/002/002
Sadly I'm no Linux genius so beyond understanding that I assigned an owner and added group permissions, I can't claim I fully understand the consequences beyond scanning of making these changes. In my defence, my ReadyNAS is only used on a home network and no-one else has access, my risks are minimal.
Hopefully this is helpful to someone :-)
(from the terminal, as root) run scanimage -L
Result will be along the lines of: device `niash:libusb:002:002' is a Hewlett-Packard ScanJet 3300C flatbed scanner - the two numbers after libusb are important
Find the USB directory at /proc/bus/usb/
The scanner device access depends on the saned user being able to access the locations within the folder structure corresponding to those two numbers above
In my case the numbers were 002:002, so the folder structure was /proc/bus/usb/002/002
To grant access I followed advice from here: http://penguin-breeder.org/sane/saned/
In my case I typed the following:
$ chown root:saned /proc/bus/usb/002 && chmod g+rw /proc/bus/usb/002
$ chown root:saned /proc/bus/usb/002/002 && chmod g+rw /proc/bus/usb/002/002
Sadly I'm no Linux genius so beyond understanding that I assigned an owner and added group permissions, I can't claim I fully understand the consequences beyond scanning of making these changes. In my defence, my ReadyNAS is only used on a home network and no-one else has access, my risks are minimal.
Hopefully this is helpful to someone :-)
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