#!/bin/bash set -e tmpfile=$(mktemp) if [ ! -w $tmpfile ] ; then echo "Failed to create tmp file" >&2 exit 0 fi trap "rm -rf $tmpfile" EXIT # cleanup if aborted RULESET="add table x add chain x y add rule x y ip saddr 1.1.1.1 counter flush ruleset add table x add chain x y add rule x y ip saddr 2.2.2.2 counter" echo "$RULESET" > $tmpfile $NFT -f $tmpfile if [ $? -ne 0 ] ; then echo "E: unable to load good ruleset" >&2 exit 1 fi