#! /bin/sh

# If X isn't running, get out of here now.
# We can't merely check the DISPLAY env variable because this script
# runs on a cron job, not below where X was started.
#if ps -U $USER | grep -q Xorg
#then
#   exit
#fi


DEFAULT_DISPLAY=":0.0"
CMD_STRING="xset +dpms"


# Send messages to stdout tagged as originating from this script.
msg () {
   echo "$(basename $0): $1"
}


# It all starts here

if [ -n "$*" ]
then
   msg "Running command(s) now"
   $*
   msg "Command(s) finished, sleeping now..."
   sleep 1
fi

if [ -z "$DISPLAY" ]
then
   msg "No DISPLAY variable, using a reasonable default: $DEFAULT_DISPLAY"
   msg "Re-enabling dpms now"
   DISPLAY=$DEFAULT_DISPLAY $CMD_STRING
else
   msg "Re-enabling dpms now"
   $CMD_STRING
fi