post_install() {
  if [ -z "$(getent group sqlgrey)" ]; then
    groupadd -g 111 sqlgrey
  fi
  if [ -z "$(getent passwd sqlgrey)" ]; then
    useradd -u 111 -g sqlgrey -c "SQLgrey Daemon" -d /var/lib/sqlgrey -m -s /bin/false sqlgrey
  fi
}

post_upgrade() {
  post_install $1
}

pre_remove() {
  userdel sqlgrey &> /dev/null
  groupdel sqlgrey &> /dev/null
}

op=$1
shift

$op $*