# send all apps (except aterm and pypanel) the HUP signal
for app in `wmctrl -l | grep -v panel | grep -v aterm`; do  
   wmctrl -c "$app"
done

sleep 3

# bring possible save requests to foreground
wmctrl -a "Save Message"         # Thunderbird
wmctrl -a "Microsoft Word"       # Word
wmctrl -a "OpenOffice.org 2.0"   # OpenOffice
wmctrl -a "Confirm close"        # Firefox > 1 tabs
wmctrl -a "Dokumente speichern"  # kate
wmctrl -a "Dokument schlie"      # kwrite
wmctrl -a "LyX"                  # LyX LaTeX editor
wmctrl -a "Save File"            # nedit 

Xdialog --title "Shutdown" --default-no --yesno "Shut down?\n \
Data will not be automatically saved! " 10 50 
# catch Xdialog's exit code
EXIT_CODE=$?

# process Xdialog's exit code
case $EXIT_CODE in
    0) # Continue
       sudo /sbin/shutdown -h now
       ;;
    1) # Cancel/No pressed.
       exit 0
       ;;
  255) # An error occured or the box was closed.
       exit 1
       ;;
esac

exit 0