#! /bin/bash

# start Virtualbox VM with an event hook that fires when closing
# takes one argument which is the string name of the VM to start

if [[ -z "$1" ]]; then
    echo "No VM specified"
    exit 1
fi

# when VBoxManage runs it spawns a new process with the machine uuid
# as part of the full command. This is the process we wish to monitor
# in order to fire an event when it closes. Therefore, need to get the
# machine uuid for the target VM from the config files (yes VBoxManage
# can do this but it seems to randomly take a long time; sed is way
# more reliable)

vbox_conf="$XDG_CONFIG_HOME/VirtualBox/VirtualBox.xml"
vbox_home=$(sed -n 's/.*defaultMachineFolder=\"\(.*\)\" defaultHardDiskFormat.*/\1/p' "$vbox_conf")
vm_conf="$vbox_home/$1/$1.vbox"

if [[ ! -e "$vm_conf" ]]; then
    echo "Invalid VM specified"
    exit 1
fi

machine_uuid=$(sed -n 's/.*Machine uuid=\"{\(.*\)}\".*/\1/p' "$vm_conf")

VBoxManage startvm "$1"

vm_pid=$(pgrep -f "$machine_uuid")

# ew polling...
while [ -d "/proc/$vm_pid" ]; do
    sleep 0.1
done

#xitsign