#!/bin/sh

# This script is public domain, there is no copyright on it.
# - Wayne Schlitt

# figure out our IP address
our_dom=`ntpq -c host | sed 's/current host is //'`

if [ "$our_dom" = "localhost"  -o  "$our_dom" = "127.0.0.1" ]
then
    our_dom=`dnsdomainname`
fi

our_ip=`dig $our_dom +short`

pool_ns=`dig pool.ntp.org ns +short | sed "s/\.$//" | sort`
num_pool_ns=`echo "$pool_ns" | wc -l`
if [ $num_pool_ns -lt 3 ]
then
    echo "Error:  could not get a complete list of pool name servers"
    echo "found: $pool_ns"
    exit 1
fi


ns_refs=""
ns_count=0
for ns in $pool_ns
do
    ip=`dig pool.ntp.org @$ns a +short | grep "^$our_ip$"`
    if [ -n "$ip" ]
    then
	ns_refs="$ns_refs $ns"
	ns_count=`expr $ns_count + 1`
    fi
done

tstamp=`date "+%D %T"`

if [ "X$1" = "X-startfile" ]
then
    if [ -f $2 ]
    then
    stats=`/usr/local/sbin/ntp_clients_stats -startfile $2 | head -2 | \
         sed  "s/.*: */ /" | tr '\n' ' '`
    else
	echo "$2 does not exist" 1>&2
	exit 1
    fi
else
    stats=`/usr/local/sbin/ntp_clients_stats | head -2 | \
         sed "s/.*: */ /" | tr '\n' ' '`
fi

echo "$tstamp $stats  $ns_count $ns_refs"