USB and Scanners
Ian Pilcher
i.pilcher at comcast.net
Mon Feb 14 01:46:07 UTC 2005
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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