#!/usr/bin/python

import commands
import time

cmd = "echo `/opt/sbin/unbound-control stats | egrep -e 'total.num.queries' -e 'time.elapsed' | sed -e 's/.*=//'`"

f = open("/opt/bin/dns_query_log.txt", "a")

oldtotal = float(0)

while 1:
        #start_time = int(time.time())
        output = commands.getoutput(cmd).split()
	#print output
        #end_time = int(time.time())
        #run_time = end_time - start_time
	newtotal = float(output[0])

        date = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
	tqs = newtotal - oldtotal
	elapsed = float(output[1])
	qps = tqs / elapsed
        f.write("%s\t%f\t%f\t%f\n" %(date, tqs, elapsed, qps))
	f.flush()

	#print "old value: %f" %oldtotal
	#print "new value: %f" %newtotal
	oldtotal = newtotal
        time.sleep(60)

f.close()