Vagrant Halt before shutdown

vagrant-boxes.sh

#!/bin/sh -e
### BEGIN INIT INFO
# Provides:          something warm and fuzzy 
# Required-Start:    vboxdrv
# Required-Stop:     vboxdrv
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts suspended vagrant boxes and suspends running vagrant boxes
# Description:       
### END INIT INFO

# presumably only users with valid login shells are running vagrant boxes
validShells=$(cat /etc/shells | grep -v "#" | sed ':a;N;$!ba;s/\n/|/g')
userList=$(grep -E "$validShells" /etc/passwd | awk -F ':' ' { print $1 } ' | tr "\\n" " ")

case $1 in
  start)
    # loop thru every user
    for user in $userList; do
      # loop thru users suspended boxes
      for vm in $(su -c "vagrant global-status" $user 2>/dev/null | grep saved | awk ' { print $5 } '); do
        cd $vm >/dev/null
        su -c "vagrant up" $user
        su -c "vagrant status" $user > /dev/null # update global-status cache
      done
    done
  ;;
  stop)
    for user in $userList; do
      for vm in $(su -c "vagrant global-status" $user 2>/dev/null | grep running | awk ' { print $5 } '); do
        cd $vm > /dev/null
        su -c "vagrant suspend" $user
        su -c "vagrant status" $user > /dev/null # update global-status cache
      done
    done
  ;;
  status)
    for user in $userList; do
      echo "$user's vagrant box status"
      echo "------------------------------------------------------------------------"
      su -c "vagrant global-status 2> /dev/null" $user
      echo
      echo
    done
  ;;
  *)
    echo "Usage: $0 {start|stop|status}" >&2
    exit 1
  ;;
esac

exit 0