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#!/bin/bash
tmpfile=""
tmpfile1=""
set -x
clean_tmpfile()
{
if [ ! -z "$tmpfile" ];then
rm -f "$tmpfile"
fi
if [ ! -z "$tmpfile1" ];then
rm -f "$tmpfile1"
fi
}
trap clean_tmpfile EXIT
tmpfile=$(mktemp) || exit 1
tmpfile1=$(mktemp) || exit 1
do_diff()
{
diff -u "$1" "$2"
if [ $? -ne 0 ]; then
echo "iptables configuration is not restored" 1>&2
exit 1
else
exit 0
fi
}
$XT_MULTI iptables -N FOO || exit 1
$XT_MULTI iptables -I INPUT || exit 1
$XT_MULTI iptables -I FOO || exit 1
$XT_MULTI iptables -I FOO || exit 1
$XT_MULTI iptables-save | grep -v "^#" > "$tmpfile" || exit 1
$XT_MULTI iptables-restore < "$tmpfile" || exit 1
$XT_MULTI iptables -N BAR || exit 1
$XT_MULTI iptables -A BAR || exit 1
$XT_MULTI iptables-restore < "$tmpfile" || exit 1
$XT_MULTI iptables-save | grep -v "^#" > "$tmpfile1" || exit 1
do_diff $tmpfile1 "$tmpfile"
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