DBus solution for Raspberry Pi (and other console distros)

DBUS_VARS_FILE="$HOME/.dbus_vars" # Where file with variables is stored
# This function launches dbus and saves environment variables
launch_dbus() {
        OLDUMASK=$(umask) # Save umask
        umask 0077 # Set secure umask
        if dbus-launch --auto-syntax > "$DBUS_VARS_FILE"; # Launch DBus and save its environment variables
        then
                . "$DBUS_VARS_FILE" # Load environment variables
        else
                # Error
                echo Failed to launch DBus
        fi
        umask $OLDUMASK # Restore umask
}

if [ -f "$DBUS_VARS_FILE" ];
then
        . "$DBUS_VARS_FILE" # Load environment variables
        if ps ax | grep -q '^ '"$DBUS_SESSION_BUS_PID"; # Check whether DBus is running
        then
                echo -n # DBus is running, so do nothing
        else
                launch_dbus # DBus is not running (old file was loaded)
        fi

else
        launch_dbus
fi