sane-backends/sane-libusbscanner

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#!/bin/sh
# This file is part of sane-backends.
#
# This script changes the permissions and ownership of a USB device under
# /proc/bus/usb to grant access to this device to users in the scanner group.
#
# Ownership is set to root:scanner, permissions are set to 0660.
#
# Arguments :
# -----------
# ACTION=[add|remove]
# DEVICE=/proc/bus/usb/BBB/DDD
# TYPE=usb
# latest hotplug doesn't set DEVICE on 2.6.x kernels
echo "inizio device:$DEVICE" >> /root/scanner
echo "inizio devpath: $DEVPATH" >> /root/scanner
if [ -z "$DEVICE" ] ; then
IF=`echo $DEVPATH | sed 's/\(\/class\/usb_device\/usbdev\)\(.*\)\.\(.*\)/\2/'`
DEV=$(cat /sys/${DEVPATH}/device/devnum)
DEVICE=`printf '/proc/bus/usb/%.03d/%.03d' $IF $DEV`
fi
echo "if:$IF"
echo "DEV:$DEV"
echo "device:$DEVICE" >> /root/scanner
echo "devpath: $DEVPATH" >> /root/scanner
echo "action: $ACTION" >> /root/scanner
echo "type: $TYPE" >> /root/scanner
if [ "$ACTION" = "add" ]; then
chown root:scanner "$DEVICE"
chmod 0660 "$DEVICE"
fi
# That's an insecure but simple alternative
# Everyone has access to the scanner
# if [ "$ACTION" = "add" -a "$TYPE" = "usb" ]; then
# chmod 0666 "$DEVICE"
# fi