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#!/bin/sh
# Copyright (C) 2014-2021 Daniel Baumann <daniel.baumann@open-infrastructure.net>
#
# SPDX-License-Identifier: GPL-3.0+
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
set -e
. /etc/network-tools/config/ddns-client.conf
# alternatives handling for dig
if command -v kdig > /dev/null 2>&1
then
# knot-dnsutils
DIG="kdig +noadditional"
elif command -v dig > /dev/null 2>&1
then
# bind9-dnsutils
DIG="dig +noadditional"
else
echo "'${HOOK}': need dig from bind9-dnsutils or knot-dnsutils" >&2
exit 1
fi
NAMESERVER="$(echo ${NAMESERVERS} | awk '{ print $1 }')"
# Run
for NAMESERVER in ${NAMESERVERS}
do
# shellcheck disable=SC2086
${DIG} -k "${TSIG_KEYFILE}" @"${NAMESERVER}" AXFR "${ZONE}"
done | grep -E 'IN (A|AAAA|TXT) ' | sort -u
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