#!/bin/bash

set -e

case $1 in
  preinst)
    exit 0
    ;;
  postinst)
    if ! getent group ntp 2>&1 > /dev/null; then
      if groupadd -g 87 ntp; then
        echo 'Created group ntp'
      else
        echo 'Failed to create group ntp!'
        exit 1
      fi
    fi
    if ! getent passwd ntp 2>&1 > /dev/null; then
      if useradd -c "NTP service" -d /var/lib/ntp -g ntp \
      -s /bin/false -u 87 ntp; then
        echo 'Created user ntp'
      else
        echo 'Failed to create user ntp!'
        exit 1
      fi
    fi
    ;;
  prerm)
    exit 0
    ;;
  postrm)
    exit 0
    ;;
esac