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