USB and Scanners

[Ian Pilcher]

Stuart Sears wrote:
> This is udev doing it's 'thang'.

No, it's not.  In Fedora Core 3, scanners are accessed through libusb,
rather than a specific kernel module.  Without the kernel module, there
isn't a "real" device that represents the scanner; no device, no udev.

The symbolic link that appears in /dev is a hack that tells pam to set
the permissions of the appropriate /proc/bus/usb/... entry when a
"console" user logs on.  This allows non-root users to access a scanner
that is "cold-plugged".

This setup works for my Perfection 1650.  SANE uses libusb to find the
scanner when it starts up, so the name of the symlink is irrelevant.

-- 
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Ian Pilcher                                        i.pilcher at comcast.net
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