Start/Stop VirtualBox VM in headless mode

vm.sh

#!/usr/bin/env bash

vmm=VBoxManage

function usage {
    echo "Usage:" $(basename $0) "start|stop" "hostname" >/dev/stderr
}

function get_ip {
    VBoxManage guestproperty enumerate $1 \
        | grep "V4/IP" \
        | cut -d ' ' -f 4 \
        | tr -d ","      
}

if [ "$1" = "" ]; then
    echo "Need command: start | stop"
    usage
    exit 1
fi

cmd=$1

if [ "$2" = "" ]; then
    echo "Need VM hostname"
    usage
    exit 1
fi

vm=$($vmm list vms | grep $2 | cut -d ' ' -f 1 | tr -d '"')

echo ${cmd} $vm

if [ $cmd = "start" ]
then
    VBoxManage startvm $vm --type headless
    echo "$2:" $(get_ip $vm)
elif [ $cmd = "stop" ]
then
    VBoxManage controlvm $vm acpipowerbutton
else
    usage
    exit 1
fi