#!/bin/sh

PATH=/usr/local/bin:/usr/local/sbin:/sbin:/bin:/usr/bin:/usr/sbin:
DTC_ETC=$1
IFACELIST=$2

BYTES_IN=0
BYTES_OUT=0

if [ -x /usr/bin/rrdtool ] ; then
	RRDTOOL=/usr/bin/rrdtool
else
	if [ -x /usr/local/bin/rrdtool ] ; then
		RRDTOOL=/usr/local/bin/rrdtool
	else
		exit 1
	fi
fi

for IFACE_NAME in $IFACELIST ; do
#	echo $IFACE_NAME
	IFACE_TXT=`cat /proc/net/dev | grep eth0 | cut -f 2 -d':'`
	BYTES_IN=$(($BYTES_IN + `echo ${IFACE_TXT} | gawk -F ' ' '{print $1}'`))
	BYTES_OUT=$(($BYTES_OUT + `echo ${IFACE_TXT} | gawk -F ' ' '{print $9}'`))
done
rrdtool update $DTC_ETC/netusage.rrd "N:${BYTES_IN}:${BYTES_OUT}"