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107 lines
3.2 KiB
107 lines
3.2 KiB
#!/bin/bash |
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# Copyright (C) 2012 Stefan Breunig <stefan+measure-net-speed@mathphys.fsk.uni-heidelberg.de> |
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# Copyright (C) 2014 kaueraal |
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# Copyright (C) 2015 Thiago Perrotta <perrotta dot thiago at poli dot ufrj dot br> |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# Get custom IN and OUT labels if provided by command line arguments |
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while [[ $# -gt 1 ]]; do |
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key="$1" |
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case "$key" in |
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-i|--inlabel) |
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INLABEL="$2" |
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shift;; |
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-o|--outlabel) |
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OUTLABEL="$2" |
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shift;; |
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esac |
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shift |
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done |
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[[ -z $INLABEL ]] && INLABEL="IN " |
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[[ -z $OUTLABEL ]] && OUTLABEL="OUT " |
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# Use the provided interface, otherwise the device used for the default route. |
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if [[ -z $INTERFACE ]] && [[ -n $BLOCK_INSTANCE ]]; then |
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INTERFACE=$BLOCK_INSTANCE |
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elif [[ -z $INTERFACE ]]; then |
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INTERFACE=$(ip route | awk '/^default/ { print $5 ; exit }') |
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fi |
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# Issue #36 compliant. |
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if ! [ -e "/sys/class/net/${INTERFACE}/operstate" ] || ! [ "`cat /sys/class/net/${INTERFACE}/operstate`" = "up" ] |
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then |
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echo "$INTERFACE down" |
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echo "$INTERFACE down" |
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echo "#FF0000" |
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exit 0 |
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fi |
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# path to store the old results in |
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path="/dev/shm/$(basename $0)-${INTERFACE}" |
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# grabbing data for each adapter. |
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read rx < "/sys/class/net/${INTERFACE}/statistics/rx_bytes" |
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read tx < "/sys/class/net/${INTERFACE}/statistics/tx_bytes" |
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# get time |
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time=$(date +%s) |
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# write current data if file does not exist. Do not exit, this will cause |
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# problems if this file is sourced instead of executed as another process. |
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if ! [[ -f "${path}" ]]; then |
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echo "${time} ${rx} ${tx}" > "${path}" |
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chmod 0666 "${path}" |
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fi |
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# read previous state and update data storage |
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read old < "${path}" |
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echo "${time} ${rx} ${tx}" > "${path}" |
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# parse old data and calc time passed |
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old=(${old//;/ }) |
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time_diff=$(( $time - ${old[0]} )) |
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# sanity check: has a positive amount of time passed |
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[[ "${time_diff}" -gt 0 ]] || exit |
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# calc bytes transferred, and their rate in byte/s |
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rx_diff=$(( $rx - ${old[1]} )) |
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tx_diff=$(( $tx - ${old[2]} )) |
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rx_rate=$(( $rx_diff / $time_diff )) |
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tx_rate=$(( $tx_diff / $time_diff )) |
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# shift by 10 bytes to get KiB/s. If the value is larger than |
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# 1024^2 = 1048576, then display MiB/s instead |
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# incoming |
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echo -n "$INLABEL" |
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rx_kib=$(( $rx_rate >> 10 )) |
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if hash bc 2>/dev/null && [[ "$rx_rate" -gt 1048576 ]]; then |
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printf '%sM' "`echo "scale=1; $rx_kib / 1024" | bc`" |
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else |
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echo -n "${rx_kib}K" |
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fi |
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echo -n " " |
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# outgoing |
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echo -n "$OUTLABEL" |
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tx_kib=$(( $tx_rate >> 10 )) |
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if hash bc 2>/dev/null && [[ "$tx_rate" -gt 1048576 ]]; then |
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printf '%sM' "`echo "scale=1; $tx_kib / 1024" | bc`" |
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else |
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echo -n "${tx_kib}K" |
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fi
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