postinst is in gtkballs 3.1.5-11.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | #! /bin/sh
# postinst script for Gtkballs
set -e
case "$1" in
    configure)
		# create a high score file
		SCOREFILE=/var/games/gtkballs-scores;
		if [ ! -f $SCOREFILE ]; then 
			touch $SCOREFILE; 
			chgrp games $SCOREFILE;
			chmod 0664 $SCOREFILE;
		fi
    ;;
    abort-upgrade|abort-remove|abort-deconfigure)
    ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# Automatically added by dh_installmenu
if [ "$1" = "configure" ] && [ -x "`which update-menus 2>/dev/null`" ]; then
	update-menus
fi
# End automatically added section
exit 0
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