muninlite/plugins/ntpdate

config_ntpdate() {
  echo "graph_title NTP offset and delay to peer $NTP_PEER"
  echo "graph_args --base 1000 --vertical-label msec"
  echo "graph_category time"
  echo "offset.label Offset"
  echo "delay.label Delay"
}

fetch_ntpdate() {
  NTPDATE="/usr/sbin/ntpdate"
  OFFSET=0
  DELAY=0
  if [ -n "$NTP_PEER" ] && [ -x "$NTPDATE" ]; then
    DATA=$("$NTPDATE" -q "$NTP_PEER" | awk '/^server.*offset/{gsub(/,/,""); printf "%s %s", ($6*1000), ($8*1000); exit;}')
    OFFSET=$(echo "$DATA" | cut -d " " -f 1)
    DELAY=$(echo "$DATA" | cut -d " " -f 2)
  fi
  echo "offset.value $OFFSET"
  echo "delay.value $DELAY"
}