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#!/bin/bash
#
# This hook copies the core systemd-networkd related service
# files to the NEWROOT and activate them in sysinit.target
# to prevent systemd from killing these while pivot_root
NEWROOT_SYSTEMD_DIR="${NEWROOT}/usr/lib/systemd/system"
NEWROOT_SYSINIT_TARGET_DIR="${NEWROOT_SYSTEMD_DIR}/sysinit.target.wants"
mkdir -p "${NEWROOT_SYSINIT_TARGET_DIR}"
for UNIT in \
systemd-networkd.socket \
systemd-networkd.service \
systemd-resolved.service
do
UNIT_PATH="$(systemctl show -p FragmentPath $UNIT | cut -c 14-)"
[ -z "${UNIT_PATH}" ] && continue
mkdir -p "${NEWROOT}/${UNIT_PATH%/*}"
cp "${UNIT_PATH}" "${NEWROOT}/${UNIT_PATH}"
ln -sf "${UNIT_PATH}" "${NEWROOT_SYSINIT_TARGET_DIR}/${UNIT}"
done
if [ -e "${NEWROOT_SYSTEMD_DIR}/systemd-resolved.service" ]; then
# this drop-in is needed to prevent a pull-in loop sysinit.target <-> basic.target
mkdir -p "${NEWROOT_SYSTEMD_DIR}/systemd-resolved.service.d/"
cat <<-EOF > "${NEWROOT_SYSTEMD_DIR}/systemd-resolved.service.d/00-no-default-deps.conf"
[Unit]
DefaultDependencies=no
EOF
# finally make sure the NEWROOT resolv.conf links to the one managed by resolved.
rm "${NEWROOT}"/etc/resolv.conf
ln -s /run/systemd/resolve/resolv.conf "${NEWROOT}"/etc/resolv.conf
fi
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