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- #!/bin/sh -e
- #
- # network-down: calculate the network receive rate
- # Copyright (C) 2008 Canonical Ltd.
- #
- # Authors: Dustin Kirkland <kirkland@canonical.com>
- #
- # This program is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, version 3 of the License.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
-
- cache="$HOME/.screen-profiles/network-down"
- interface=`route -n | tail -n 1 | sed "s/^.* //"`
- unit="kB/s"
-
- t1=`stat -c %Y "$cache"` 2>/dev/null || t1=0
- t2=`date +%s`
-
- if [ $t2 -le $t1 ]; then
- rate=0
- else
- x1=`cat "$cache"` 2>/dev/null || tx1=0
- x2=`ifconfig "$interface" | grep "RX bytes" | sed "s/^.*RX bytes://" | sed "s/ .*$//"`
- echo "$x2" > "$cache"
- rate=`echo "$t1" "$t2" "$x1" "$x2" | awk '{printf "%.0f", ($4 - $3) / ($2 - $1) / 1024 }'`
- if [ "$rate" -gt 1024 ]; then
- rate=`echo "$rate" | awk '{printf "%.1f", $1/1024}'`
- unit="MB/s"
- fi
- fi
- printf "v\005{=b mw}$rate\005{-}\005{= mw}$unit\005{-} "
-