91 lines
2.7 KiB
Plaintext
91 lines
2.7 KiB
Plaintext
|
#!/bin/bash
|
||
|
|
# Copyright (C) 2012 Stefan Breunig <stefan+measure-net-speed@mathphys.fsk.uni-heidelberg.de>
|
||
|
|
# Copyright (C) 2014 kaueraal
|
||
|
|
# Copyright (C) 2015 Thiago Perrotta <perrotta dot thiago at poli dot ufrj dot br>
|
||
|
|
|
||
|
|
# 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, either version 3 of the License, or
|
||
|
|
# (at your option) any later version.
|
||
|
|
|
||
|
|
# 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/>.
|
||
|
|
|
||
|
|
# Use the provided interface, otherwise the device used for the default route.
|
||
|
|
if [[ -n $BLOCK_INSTANCE ]]; then
|
||
|
|
INTERFACE=$BLOCK_INSTANCE
|
||
|
|
else
|
||
|
|
INTERFACE=$(ip route | awk '/^default/ { print $5 ; exit }')
|
||
|
|
fi
|
||
|
|
|
||
|
|
# Issue #36 compliant.
|
||
|
|
if ! [ -e "/sys/class/net/${INTERFACE}/operstate" ] || ! [ "`cat /sys/class/net/${INTERFACE}/operstate`" = "up" ]
|
||
|
|
then
|
||
|
|
echo "$INTERFACE down"
|
||
|
|
echo "$INTERFACE down"
|
||
|
|
echo "#FF0000"
|
||
|
|
exit 0
|
||
|
|
fi
|
||
|
|
|
||
|
|
# path to store the old results in
|
||
|
|
path="/dev/shm/$(basename $0)-${INTERFACE}"
|
||
|
|
|
||
|
|
# grabbing data for each adapter.
|
||
|
|
read rx < "/sys/class/net/${INTERFACE}/statistics/rx_bytes"
|
||
|
|
read tx < "/sys/class/net/${INTERFACE}/statistics/tx_bytes"
|
||
|
|
|
||
|
|
# get time
|
||
|
|
time=$(date +%s)
|
||
|
|
|
||
|
|
# write current data if file does not exist. Do not exit, this will cause
|
||
|
|
# problems if this file is sourced instead of executed as another process.
|
||
|
|
if ! [[ -f "${path}" ]]; then
|
||
|
|
echo "${time} ${rx} ${tx}" > "${path}"
|
||
|
|
chmod 0666 "${path}"
|
||
|
|
fi
|
||
|
|
|
||
|
|
# read previous state and update data storage
|
||
|
|
read old < "${path}"
|
||
|
|
echo "${time} ${rx} ${tx}" > "${path}"
|
||
|
|
|
||
|
|
# parse old data and calc time passed
|
||
|
|
old=(${old//;/ })
|
||
|
|
time_diff=$(( $time - ${old[0]} ))
|
||
|
|
|
||
|
|
# sanity check: has a positive amount of time passed
|
||
|
|
[[ "${time_diff}" -gt 0 ]] || exit
|
||
|
|
|
||
|
|
# calc bytes transferred, and their rate in byte/s
|
||
|
|
rx_diff=$(( $rx - ${old[1]} ))
|
||
|
|
tx_diff=$(( $tx - ${old[2]} ))
|
||
|
|
rx_rate=$(( $rx_diff / $time_diff ))
|
||
|
|
tx_rate=$(( $tx_diff / $time_diff ))
|
||
|
|
|
||
|
|
# shift by 10 bytes to get KiB/s. If the value is larger than
|
||
|
|
# 1024^2 = 1048576, then display MiB/s instead
|
||
|
|
|
||
|
|
# incoming
|
||
|
|
echo -n "IN "
|
||
|
|
rx_kib=$(( $rx_rate >> 10 ))
|
||
|
|
if [[ "$rx_rate" -gt 1048576 ]]; then
|
||
|
|
printf '%sM' "`echo "scale=1; $rx_kib / 1024" | bc`"
|
||
|
|
else
|
||
|
|
echo -n "${rx_kib}K"
|
||
|
|
fi
|
||
|
|
|
||
|
|
echo -n " "
|
||
|
|
|
||
|
|
# outgoing
|
||
|
|
echo -n "OUT "
|
||
|
|
tx_kib=$(( $tx_rate >> 10 ))
|
||
|
|
if [[ "$tx_rate" -gt 1048576 ]]; then
|
||
|
|
printf '%sM' "`echo "scale=1; $tx_kib / 1024" | bc`"
|
||
|
|
else
|
||
|
|
echo -n "${tx_kib}K"
|
||
|
|
fi
|