#!/bin/sh
-/usr/sbin/ntpclient -c 1 -s -h pool.ntp.org &
+server=$(nvram get ntp_server)
+case "$ACTION" in
+ ifup)
+ ps x | grep '[n]tpclient' >&- || {
+ route -n 2>&- | grep '0.0.0.0' >&- && /usr/sbin/ntpclient -c 1 -s -h ${server:-pool.ntp.org} &
+ }
+ ;;
+ ifdown)
+ route -n 2>&- | grep '0.0.0.0' >&- || killall ntpclient 2>&- >&- ;;
+esac