#!/bin/bash
# GPLed by mattepiu@gentoo.org
# script to let use usb scanner as users in scanner group
# need to be runned just once.


echo "This script need to be run as root (not root group, just root)"
echo ""
if [ "x$1" == "x--help" ] ; then
	echo "Script to let udev hook and handle permissions for"
	echo "usb scanners."
	echo ""
	echo "run \"usbscanner auto\" to let it do all automatically."
	exit 0
fi

if [ "x$1" != "xauto" ] ; then
	echo "Please turn on your usb scanner/s and press ENTER"
	read $USINPUT
	echo ""
fi

BIDENTIFY=`scanimage -L |grep -o -E "libusb:[0-9][0-9][0-9]:[0-9][0-9][0-9]"`
COUNT=0
for line in $BIDENTIFY ; do
	RMLBU=${line#*libusb:}
	SCAT=${RMLBU/://}
	FINAL=`udevinfo -a -p $(udevinfo -q path -n /dev/bus/usb/$SCAT) | grep -A 12 -E "KERNEL==" | grep -E "SYSFS{product}"`
	if [ "x$FINAL" != "x" ] ; then
		#echo $FINAL
		if [ "$COUNT" == "0" ] ; then
			echo "#USB Scanners hooking rules:" > /tmp/usbscanners
			echo "#-------------------------------------------------------------------------" >> /tmp/usbscanners
		fi
		echo "BUS=\"usb\", "$FINAL", GROUP=\"scanner\", MODE=\"664\"" >> /tmp/usbscanners
		let COUNT=COUNT+1
	fi 
done
if [ -e "/tmp/usbscanners" ] ; then
	echo "#-------------------------------------------------------------------------" >> /tmp/usbscanners
else
	echo "ERROR! no usb scanner detected"
        exit 1
fi

echo "this is what I would put in /etc/udev/rules.d/92-scanner.rules :"
echo ""
cat /tmp/usbscanners
echo ""
if [ "x$1" != "xauto" ] ; then
	USINPUT=""
	while [ "x$USINPUT" != "xy" ] && [ "x$USINPUT" != "xY" ] && [ "x$USINPUT" != "xn" ] && [ "x$USINPUT" != "xN" ] ; do
		echo "Do you want me to do this automatically? (Y/N)"
		read USINPUT
	done
fi
#echo "user input is : $USINPUT"
if [ "x$1" == "xauto" ] || [ "x$USINPUT" == "xy" ] || [ "x$USINPUT" == "xY" ] ; then
	echo "Overwriting /etc/udev/rules.d/92-scanner.rules"
	mv -f /tmp/usbscanners /etc/udev/rules.d/92-scanner.rules || USINPUT="0"
	if [ "x$USINPUT" == "x0" ] ; then
		echo ""
		echo "error: root privileges needed, stopping now."
		if [ -e "/tmp/usbscanners" ] ; then
                	rm "/tmp/usbscanners"
	        fi
		exit 1
	fi
	echo "Done"
	echo ""
	echo "type udevstart if you want to immediately"
	echo " use scanner as user in scanner group."
else
	if [ -e "/tmp/usbscanners" ] ; then
		rm "/tmp/usbscanners"
	fi
	exit 1
fi