postinst is in groonga-httpd 6.0.1-1ubuntu1.
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 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35  | #! /bin/sh
set -e
fixperms() {
    for target in /etc/groonga/httpd /etc/groonga/httpd/logs /var/log/groonga/httpd /etc/groonga/httpd/scgi_temp /etc/groonga/httpd/proxy_temp /etc/groonga/httpd/uwsgi_temp /etc/groonga/httpd/fastcgi_temp /etc/groonga/httpd/client_body_temp /etc/groonga/httpd/html
    do
        dpkg-statoverride --list $target >/dev/null || \
            dpkg-statoverride --update --add groonga groonga 0755 $target
    done
}
case "$1" in
    configure)
        fixperms
        ;;
    abort-upgrade|abort-deconfigure|abort-remove)
        :
        ;;
    *)
        echo "Called with unknown argument $1, bailing out."
        exit 1
        ;;
esac
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/groonga-httpd" ]; then
		update-rc.d groonga-httpd defaults >/dev/null
	fi
	if [ -x "/etc/init.d/groonga-httpd" ] || [ -e "/etc/init/groonga-httpd.conf" ]; then
		invoke-rc.d groonga-httpd start || exit $?
	fi
fi
# End automatically added section
 |