enicstat

#!/bin/bash
# enicstat -	Get interface speed/duplex from ethtool; use with nicstat
#
# Copyright (c) 2009, Tim.Cook@sun.com
#
# nicstat is licensed under the Artistic License 2.0.  You can find
# a copy of this license as LICENSE.txt included with the nicstat
# distribution, or at http://www.perlfoundation.org/artistic_license_2_0

PROG=${0##*/}

#-- Add /sbin to PATH, as that is where ethtool usually is
export PATH=${PATH}:/sbin

#-- Get list of interface names
while read a b c
do
	case $a in
	'Inter'* | 'face' ) ;;
	*':'[0-9]* | *':' )
		ifname=${a%:*}
		interfaces="$interfaces $ifname"
		;;
	esac
done < /proc/net/dev

#-- Get speed/duplex of each interface using ethtool
nl='
'
for if in $interfaces
do
	ifname=
	speed=
	duplex=
	valid=false
	settings=`ethtool "$if" 2>/dev/null`
	x=${settings#Settings for }
	ifname=${x%%:*}
	x=${settings##*	Speed: }
	case $x in
	[1-9]*'Mb/s'* )
		valid=true ;;
	esac
	speed=${x%%Mb/s$nl*}
	x=${settings##*	Duplex: }
	duplex=${x%%$nl*}
	case $valid,$ifspeeds in
	true, )
		ifspeeds="${ifname}:$speed$duplex" ;;
	true,* )
		ifspeeds="$ifspeeds,${ifname}:$speed$duplex" ;;
	esac
done

if [ -z "$ifspeeds" ]; then
	echo "$PROG: warning: failed to obtain any interface speeds" >&2
	exec nicstat "$@"
fi

#-- Run nicstat with what we got
exec nicstat -S "$ifspeeds" "$@"