postinst is in ratbox-services-sqlite 1.2.4-1ubuntu1.
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 | #!/bin/sh
set -e
DATABASE=/etc/ratbox-services/ratbox-services.db
SCHEMA=/usr/share/ratbox-services/lib/schema-sqlite.sql
if [ ! -e $DATABASE ] ; then
	echo -n "Creating $DATABASE"
	# Assuming some admin deleted the directory...
	mkdir -p /etc/ratbox-services
	sqlite3 $DATABASE < $SCHEMA
	chown irc:irc $DATABASE
	echo "."
fi
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