#!/bin/bash

# make sure we have the required udev variables
if [ -z "$BUSNUM" -o -z "$DEVNUM" -o -z "$DEVPATH" ]; then
	exit 1
fi

declare -rg _vboxdir="/usr/lib/virtualbox"
declare -rg _vboxmanage="${_vboxdir}/VBoxManage"
declare -rg _vboxruntime="${_vboxdir}/VirtualBox"

declare -r user="$(ps aux | grep "$_vboxruntime"  | grep -v grep | awk '{print $1}')"
if [ -z "$user" ] || ! id "$user" &> /dev/null; then
	# No user session with virtualbox is running, exit silently
	exit 0
fi

export VBOX_IPC_SOCKETID="$user"

# set default locale to make sure the vboxmanage output is not broken on UTF-8 chars
[ -s "/etc/default/locale" ] && . /etc/default/locale
[ -z "LANG" ] && LANG="de_DE.UTF-8"
export LANG
# make sure LC_ALL does not fiddle with this
unset LC_ALL

# find UUID of running VM
declare -r vmuuid="$("$_vboxmanage" list runningvms | awk '{print $NF}' | tr -d '{}')"
if [ -z "$vmuuid" ]; then
	logger "Failed to find running VirtualBox instance of '$user'."
	exit 1
fi

declare -r devname="/dev/vboxusb/$BUSNUM/$DEVNUM"
for tts in 1 1 1 1 1 2 3 5 STOP; do
	if [ "x$tts" = "xSTOP" ]; then
		logger "$0: Could not find '$devname' as expected..."
		exit 1
	fi
	[ -e "$devname" ] && break
	logger "waiting for $devname..."
	sleep $tts
done

declare -r usbaddress="$("$_vboxmanage" list usbhost | grep "$DEVPATH" | awk '$1 = /Address:/ {print $2}')"
logger "Attaching '$usbaddress' to '$vmuuid'..."
for tries in 1 2 3 STOP; do
	if [ "$tries" = "STOP" ]; then
		logger "$0: Failed after 3 tries!"
		exit 1
	fi
	if "$_vboxmanage" controlvm "$vmuuid" usbattach "$usbaddress"; then
		exit 0
	fi
	sleep 1
done