wit-network-config/debian/wit-network-config.preinst

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#!/bin/bash
# preinst script for #PACKAGE#
#
# see: dh_installdeb(1)
set -e
# summary of how this script can be called:
# * <new-preinst> `install'
# * <new-preinst> `install' <old-version>
# * <new-preinst> `upgrade' <old-version>
# * <old-preinst> `abort-upgrade' <new-version>
# for details, see https://www.debian.org/doc/debian-policy/ or
# the debian-policy package
case "$1" in
install|upgrade)
export LOOPBACKv4=$(dig a +short ${HOSTNAME})
export LOOPBACKv6=$(dig aaaa +short ${HOSTNAME})
NODEASN=$(dig txt +short asn.${HOSTNAME})
NODEASN="${NODEASN%\"}"
NODEASN="${NODEASN#\"}"
export NODEASN
if [ -z $LOOPBACKv4 ] || [ -z $LOOPBACKv6 ] || [ -z $NODEASN ]; then
echo "unable to find my LOOPBACK IP and/or ASN: $LOOPBACKv4/$LOOPBACKv6/$NODEASN"
exit 2
fi
systemctl stop systemd-networkd.socket
systemctl stop systemd-networkd.service
systemctl stop systemd-networkd-wait-online
systemctl disable systemd-networkd.service
systemctl disable systemd-networkd.socket
systemctl disable systemd-networkd-wait-online
;;
abort-upgrade)
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
#DEBHELPER#
exit 0