post_install() {
    if [ "$(getent group rsyncd | cut -d ":" -f 3)" != "48" ]; then
        groupadd -g 48 rsyncd
    fi
    if [ "$(getent passwd rsyncd | cut -d ":" -f 3)" != "48" ]; then
        useradd -c "rsyncd Daemon" -m -d /srv/rsync -g rsyncd \
                -s /bin/false -u 48 rsyncd
    fi

    systemctl enable rsyncd.service
}

post_upgrade() {
    pre_remove
    post_install
}

pre_remove() {
    systemctl stop rsyncd.socket
    systemctl stop rsyncd.service
    systemctl disable rsyncd.socket
    systemctl disable rsyncd.service
}

post_remove() {
    groupdel rsyncd 2>/dev/null || true
    userdel -r rsyncd 2>/dev/null  || true
}