Pause/Play audio on screen lock/unlock

audiolock.sh

#!/usr/bin/env bash

# This script pauses music on Ubuntu when screen is locked (cmd+l)
# My other script 'playdog' is required.
# It gives you seamless controls to vlc, spotify and mocp
# You should add this script to startup scripts
# Get playdog here: https://gist.github.com/chanux/db01bd2c66effc7a259f

dbus-monitor --session "type='signal',interface='com.ubuntu.Upstart0_6'" |
  while read x; do
      $(echo $x | grep "desktop-lock" &> /dev/null) && playdog -pause &> /dev/null;
      $(echo $x | grep "desktop-unlock" &> /dev/null) && playdog -playpause &> /dev/null;
  done