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fix issues shellcheck and support vpn

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Jesús 2019-07-14 18:05:20 -05:00
parent 557015eaa0
commit 65b9c8e23c
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1 changed files with 54 additions and 26 deletions
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scripts/i3blocks/bandwidth
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@ -2,6 +2,7 @@
# 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>
# Copyright (C) 2019 Jesús E. <heckyel@hyperbola.info>
# 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
@ -16,15 +17,42 @@
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Get custom IN and OUT labels if provided by command line arguments
while [[ $# -gt 1 ]]; do
key="$1"
case "$key" in
-i|--inlabel)
INLABEL="$2"
shift;;
-o|--outlabel)
OUTLABEL="$2"
shift;;
esac
shift
done
[[ -z "$INLABEL" ]] && INLABEL="IN "
[[ -z "$OUTLABEL" ]] && OUTLABEL="OUT "
# 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 }')
if [[ -z $INTERFACE ]] && [[ -n $BLOCK_INSTANCE ]]; then
INTERFACE=$BLOCK_INSTANCE
elif [[ -z $INTERFACE ]]; then
# Verify tun, vpn connection
if [[ $(ip route | awk '/^default/ { print $5 ; exit }') = "tun0" ]]; then
INTERFACE=$(ip route | awk -v i=5 -v j=3 'FNR == i {print $j}')
else
INTERFACE=$(ip route | awk '/^default/ { print $5 ; exit }')
fi
fi
# Exit if there is no default route
[[ -z "$INTERFACE" ]] && exit
# Issue #36 compliant.
if ! [ -e "/sys/class/net/${INTERFACE}/operstate" ] || ! [ "`cat /sys/class/net/${INTERFACE}/operstate`" = "up" ]
if ! [ -e "/sys/class/net/${INTERFACE}/operstate" ] || \
{ ! [ "$TREAT_UNKNOWN_AS_UP" = "1" ] &&
! [ "$(cat "/sys/class/net/${INTERFACE}/operstate")" = "up" ]; }
then
echo "$INTERFACE down"
echo "$INTERFACE down"
@ -33,11 +61,11 @@ then
fi
# path to store the old results in
path="/dev/shm/$(basename $0)-${INTERFACE}"
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"
read -r rx < "/sys/class/net/${INTERFACE}/statistics/rx_bytes"
read -r tx < "/sys/class/net/${INTERFACE}/statistics/tx_bytes"
# get time
time=$(date +%s)
@ -45,46 +73,46 @@ time=$(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 "${path}"
echo "${time} ${rx} ${tx}" > "${path}"
chmod 0666 "${path}"
fi
# read previous state and update data storage
read old < "${path}"
read -r old < "${path}"
echo "${time} ${rx} ${tx}" > "${path}"
# parse old data and calc time passed
old=(${old//;/ })
time_diff=$(( $time - ${old[0]} ))
time_diff=$(( 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 / $time_diff ))
rx_diff=$(( 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; $rx_kib / 1024" | bc`"
echo -n "$INLABEL"
rx_kib=$(( rx_rate >> 10 ))
if hash bc 2>/dev/null && [[ "$rx_rate" -gt 1048576 ]]; then
printf '%sM' "$(echo "scale=1; $rx_kib / 1024" | bc)"
else
echo -n "${rx_kib}K"
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; $tx_kib / 1024" | bc`"
echo -n "$OUTLABEL"
tx_kib=$(( tx_rate >> 10 ))
if hash bc 2>/dev/null && [[ "$tx_rate" -gt 1048576 ]]; then
printf '%sM\n' "$(echo "scale=1; $tx_kib / 1024" | bc)"
else
echo -n "${tx_kib}K"
echo -n "${tx_kib}K"
fi