#!/bin/sh
ANTIROLLBACK=/config/ar_clock
TIME_FILE=/tmp/time.synced

case "$1" in
  start)
    cp /etc/ntpd.conf.default /tmp/ntpd.conf
    echo "UTC" > /tmp/TZ

    if [ -s $ANTIROLLBACK ]; then
        toolbox date +%s -s "$(cat $ANTIROLLBACK)"
    fi

    toolbox dmesg | grep ' T: ' | (
      lasttime=0
      while IFS='[] ' read level uptime service version \
                           timestamp humandate humantime ntpsync junk; do
        if [ "$service" = "T:" ] && [ "$ntpsync" = "ntp=1" ]; then
          lasttime=$timestamp
        fi
      done
      if [ "$lasttime" -gt 0 ]; then
        echo "Approximate time carried from last boot: $lasttime"
        toolbox date +%s -s $lasttime
      fi
      #TODO(irinams): create the TIME_FILE only when we have a way to approximate
      # how much time was spent during reboot to add it to to lasttime
      #echo >"TIME_FILE"
    )

    (
      wait-until-created /tmp/ntp.synced
      echo : >"$TIME_FILE"
    ) &

    babysit 60 antirollback -u bin -p $ANTIROLLBACK 2>&1 | logos rollback &
    ;;
  stop)
    pkillwait -x antirollback
    rm -f "$TIME_FILE"
    ;;
  restart|reload)
    $0 stop; $0 start
    ;;
  *)
    echo "Usage: $0 {start|stop|restart}"
    exit 1
esac