post_install() {
  groupadd -g 111 totd
  useradd -u 111 -g totd -d / -s /bin/false totd & > /dev/null

  post_upgrade

  echo "==> totd: "
  echo "==> totd: Adjust /etc/totd.conf if you use other then"
  echo "==> totd: locally binded DNS server - ie. 127.0.0.1:53"
  echo "==> totd: "
  echo "==> totd: TOTD uses UDPv6/TCPv6 port 5005 and runs uder"
  echo "==> totd: separate totd user for security reasons."
  echo "==> totd: If you would like to use TOTD directly as 'fake'"
  echo "==> totd: DNS server for your LAN you have to setup some"
  echo "==> totd: port-forwarding or other tricks because only root"
  echo "==> totd: can bind ports <1024; ip6tables is not able to" 
  echo "==> totd: do REDIRECT right now :("
  echo "==> totd: "
  echo "==> totd: Example with 'socat', child processes run under"
  echo "==> totd: totd user."
  echo "==> totd: "
  echo "==> totd: # socat \\"
  echo "==> totd: UDP6-LISTEN:ingress_ipv6:53,bind=[::1],reuseaddr,fork,su=totd \\"
  echo "==> totd: UDP6:[::1]:5005,bind=[::1]"
  echo "==> totd: "
}

post_upgrade() {
  if [[ ! -d run/totd ]]; then
    usr/bin/systemd-tmpfiles --create usr/lib/tmpfiles.d/totd.conf
  fi
}

pre_remove() {
  userdel totd & > /dev/null
}