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#!/bin/sh
# SPDX-License-Identifier: GPL-3.0-or-later
set -e
# upgrade-4-to-5
if [ -f /lib/systemd/system/kresd.socket ] ; then
export UPG_DIR=/var/lib/knot-resolver/.upgrade-4-to-5
mkdir -p ${UPG_DIR}
touch ${UPG_DIR}/.unfinished
for sock in kresd.socket kresd-tls.socket ; do
if deb-systemd-helper is-enabled ${sock} 2>/dev/null | grep -qv masked ; then
#TODO: handle systems not running systemd
systemctl show ${sock} -p Listen > ${UPG_DIR}/${sock}
case "$(systemctl show ${sock} -p BindIPv6Only)" in
*ipv6-only)
touch ${UPG_DIR}/${sock}.v6only
;;
*default)
if cat /proc/sys/net/ipv6/bindv6only | grep -q 1 ; then
touch ${UPG_DIR}/${sock}.v6only
fi
;;
esac
fi
done
fi
#DEBHELPER#
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