#!/bin/sh

set -e

Remove_default_file()
{
	FILENAME="${1}"
	CHECKSUM="${2}"

	if [ ! -e "${FILENAME}" ] || [ -z "${CHECKSUM}" ]
	then
		return 0
	fi

	MD5SUM="$(md5sum "${FILENAME}" | cut -d' ' -f1)"

	if [ "${CHECKSUM}" = "${MD5SUM}" ]
	then
		rm -f "${FILENAME}"
	fi
}

case "${1}" in
	configure)
		# creating group
		for GROUP in frr frrvty
		do
			if ! getent group "${GROUP}" > /dev/null 2>&1
			then
				groupadd --system "${GROUP}"
			fi
		done

		# creating user
		if ! getent passwd frr > /dev/null 2>&1
		then
			useradd --system -g frr --home-dir /nonexistent --no-create-home frr
		fi

		usermod -G frrvty frr

		mkdir -p /etc/frr
		if ! dpkg-statoverride --list /etc/frr > /dev/null 2>&1
		then
			dpkg-statoverride --update --add frr frr 0700 /etc/frr
		fi

		mkdir -p /var/lib/frr
		chown frr:frr /var/lib/frr

		mkdir -p /var/log/frr
		chown frr:adm /var/log/frr

		if [ -e /etc/frr/.pkg.frr.nointegrated ]
		then
			Remove_default_file	/etc/frr/frr.conf	53456334f26ca14c15053dff133b4ac0
			Remove_default_file	/etc/frr/vtysh.conf	a9381cc58d80a472e8f51522e007e507

			rm -f /etc/frr/.pkg.frr.nointegrated
		fi
		;;

	abort-upgrade|abort-remove|abort-deconfigure)

		;;

	*)
		echo "postinst called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac

#DEBHELPER#

exit 0