sys-apps/busybox/files/mdev/usbdev

#!/bin/sh

# script is buggy; until patched just do exit 0
#exit 0

# add zeros to device or bus
add_zeros () {
	case "$(echo $1 | wc -L)" in
		1)	echo "00$1" ;;
		2)	echo "0$1" ;;
		*)	echo "$1"
	esac
	exit 0
}


# bus and device dirs in /sys
USB_PATH=$(echo $MDEV | sed -e 's/usbdev\([0-9]\).[0-9]/usb\1/')
USB_PATH=$(find /sys/devices -type d -name "$USB_PATH")
USB_DEV_DIR=$(echo $MDEV | sed -e 's/usbdev\([0-9]\).\([0-9]\)/\1-\2/')

# dir names in /dev
BUS=$(add_zeros $(echo $MDEV | sed -e 's/^usbdev\([0-9]\).[0-9]/\1/'))
USB_DEV=$(add_zeros $(echo $MDEV | sed -e 's/^usbdev[0-9].\([0-9]\)/\1/'))


# try to load the proper driver for usb devices
case "$ACTION" in
	add|"")
		# load usb bus driver
		for i in $USB_PATH/*/modalias ; do
			modprobe `cat $i` 2>/dev/null
		done
		# load usb device driver if existent
		if [ -d $USB_PATH/$USB_DEV_DIR ]; then
			for i in $USB_PATH/$USB_DEV_DIR/*/modalias ; do
				modprobe `cat $i` 2>/dev/null
			done
		fi
		# move usb device file
		mkdir -p bus/usb/$BUS
		mv $MDEV bus/usb/$BUS/$USB_DEV
		;;
	remove)
		# unload device driver, if device dir is existent
		if [ -d $USB_PATH/$USB_DEV_DIR ]; then
			for i in $USB_PATH/$USB_DEV_DIR/*/modalias ; do
				modprobe -r `cat $i` 2>/dev/null
		done
		fi
		# unload usb bus driver. Does this make sense?
		# what happens, if two usb devices are plugged in
		# and one is removed?
		for i in $USB_PATH/*/modalias ; do
			modprobe -r `cat $i` 2>/dev/null
		done
		# remove device file and possible empty dirs
		rm -f bus/usb/$BUS/$USB_DEV
		rmdir bus/usb/$BUS/ 2>/dev/null
		rmdir bus/usb/ 2>/dev/null
		rmdir bus/ 2>/dev/null
esac