#!/bin/bash


if [ "$1" = "" ]
then
	user="root"
else
	user="$1"
fi

while true
do
	# wait for login
	while [ "`who | cut -f 1 -d ' '  | grep $user`" = "" ]
	do
		sleep 2
	done

	zenity --info --title "who warning" \
	       --text "$user je tu \!\n\n`who | grep $user`"
	
	# wait for logout
	while [ "`who | cut -f 1 -d ' '  | grep $user`" != "" ]
	do
		sleep 2
	done
	
	zenity --info --title "who warning" \
	       --text "$user je pryc.\n"

done