#!/bin/bash

export LC_ALL=C

source /etc/conf.d/usbipdevd

# some sane defaults
[[ -z ${USBIP_POLLING_TIME} ]] && USBIP_POLLING_TIME="10"
[[ -z ${USBIP_TEMP} ]] && USBIP_TEMP="/var/lib/usbipdevd"
install -d ${USBIP_TEMP}

while true
do
	BUSID=$(bind_driver --list | grep -i "${USBIP_DEVICE_ID}" | sed 's|.*busid\ \([0-9].*\)\ (${USBIP_DEVICE_ID}).*|\1|')

	if [[ -n ${BUSID} ]]
	then
		# abort here if the busid is the same, because the client connection is lost on new exports
		if [[ -f ${USBIP_TEMP}/${USBIP_DEVICE_ID//:/_} ]]  &&
			[[ ${BUSID} = $(< ${USBIP_TEMP}/${USBIP_DEVICE_ID//:/_}) ]] 
		then
			echo "USBID is the same; nothing changed"
		else
			echo "Exporting USB Device with ID ${BUSID}"
			bind_driver --usbip ${BUSID}
			echo "${BUSID}" > ${USBIP_TEMP}/${USBIP_DEVICE_ID//:/_}
		fi
	else
		echo "USB Device '${USBIP_DEVICE_ID}' not found ..."
	fi

	sleep ${USBIP_WAIT_TIMEOUT}
done