#! /bin/bash

set -e

# NOTE: groupadd and useradd require root.
[ "$EUID" -ne 0 ] &&  echo "Must be run by root" && exit 1

IMAGE="docker.io/internetsystemsconsortium/bind9:9.18"

# determine current uid and gid
uidgid=$(podman run --rm --entrypoint=/bin/sh "$IMAGE" -c "/usr/bin/id -u bind; /usr/bin/id -g bind")
read -d '' -r uid gid <<< "$uidgid" || :

# create the group and user
id -g bind >/dev/null 2>&1 || groupadd -f -g "$gid" bind
id -u bind >/dev/null 2>&1 || useradd -u "$uid" -g "$gid" -M --no-log-init bind

# create our main directory setup
install -d -o bind -g bind -m 0755 /etc/bind/cfg /etc/bind/cache /etc/bind/zones /etc/bind/log/named
# copy over our config and data without overwriting anything, hopefully.
for d in cfg cache zones; do
    rsync -av --chown bind:bind --ignore-existing ./$d/ /etc/bind/$d/
done

# install our podman config
if [ -d /etc/containers/systemd ]; then
    install -o root -g root -m 0644 named.container /etc/containers/systemd/
    systemctl daemon-reload
    systemctl start named
else
    echo "containers-common not installed?"
    exit 1
fi

exit 0