#!/bin/bash

set -e

tmpfile=$(mktemp)

if [ ! -w $tmpfile ] ; then

        echo "Failed to create tmp file" >&2

        exit 0

fi

tmpdir1=$(mktemp -d)

if [ ! -d $tmpdir1 ] ; then

        echo "Failed to create tmp directory" >&2

        exit 0

fi

tmpdir2=$(mktemp -d)

if [ ! -d $tmpdir2 ] ; then

        echo "Failed to create tmp directory" >&2

        exit 0

fi

tmpfile1=$(mktemp -p $tmpdir1)

if [ ! -w $tmpfile1 ] ; then

        echo "Failed to create tmp file" >&2

        exit 0

fi

tmpfile2=$(mktemp -p $tmpdir2)

if [ ! -w $tmpfile2 ] ; then

        echo "Failed to create tmp file" >&2

        exit 0

fi

trap "rm -rf $tmpdfile $tmpfile1 $tmpfile2 && rmdir $tmpdir1 && rmdir $tmpdir2" EXIT # cleanup if aborted

RULESET1="add table x"

RULESET2="add chain x y"

RULESET3=" \

include \"$(basename $tmpfile1)\"

include \"$(basename $tmpfile2)\"

"

echo "$RULESET1" > $tmpfile1

echo "$RULESET2" > $tmpfile2

echo "$RULESET3" > $tmpfile

$NFT -I $tmpdir1 -I $tmpdir2 -f $tmpfile

if [ $? -ne 0 ] ; then

	echo "E: unable to load good ruleset" >&2

	exit 1

fi