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#!/bin/sh
# Copyright © 2014 Zhong Jianxin <azuwis@gmail.com>
#
# See file LICENSE at the project root directory for license information.
#
# Thank Stefan Breunig for the original implementation, see
# contrib/measure-net-speed.bash.
# i3status.conf should contain:
# general {
# output_format = i3bar
# }
# i3 config looks like this:
# bar {
# status_command exec /usr/share/doc/i3status/contrib/net-speed
# }
# Single interface
#ifaces="eth0"
# Multiple interfaces
#ifaces="eth0 wlan0"
# Auto detect
ifaces=$(ls /sys/class/net | grep -E '^(eth|wlan)')
# Interval must be the same as in i3status.conf
#interval=5
if [ -z "$XDG_CONFIG_HOME" ]; then
XDG_CONFIG_HOME="${HOME}/.config"
fi
# Auto detect
if [ -f "${XDG_CONFIG_HOME}/i3status/config" ]; then
i3status_conf="${XDG_CONFIG_HOME}/i3status/config"
elif [ -f ~/.i3status.conf ]; then
i3status_conf=~/.i3status.conf
else
i3status_conf="/etc/i3status.conf"
fi
if [ -f "$i3status_conf" ]; then
interval=$(grep -o '^[[:space:]]*interval[[:space:]]*=[[:space:]]*[[:digit:]]\+' $i3status_conf | grep -o '[[:digit:]]\+')
fi
if [ x"$interval" = x ]; then
interval=5
fi
last_rx=0
last_tx=0
rate=""
readable() {
local byte=$1
local kib=$(( byte >> 10 ))
if [ "$kib" -gt 1024 ]; then
local mib_int=$(( kib >> 10 ))
local mib_dec=$(( kib % 1024 * 976 / 10000 ))
if [ "$mib_dec" -lt 10 ]; then
mib_dec="0${mib_dec}"
fi
echo "${mib_int}.${mib_dec}M"
else
echo "${kib}K"
fi
}
update_rate() {
local rx=0
local tx=0
for iface in $ifaces; do
local tmp_rx
local tmp_tx
local stat="/sys/class/net/${iface}/statistics"
read tmp_rx < "${stat}/rx_bytes"
read tmp_tx < "${stat}/tx_bytes"
rx=$(( rx + tmp_rx ))
tx=$(( tx + tmp_tx ))
done
rate="$(readable $(( (rx - last_rx) / interval )))↓ $(readable $(( (tx - last_tx) / interval )))↑"
last_rx=$rx
last_tx=$tx
}
# while :; do
# update_rate
# echo "$rate"
# sleep "$interval"
# done
i3status | (read line && echo "$line" && read line && echo "$line" && read line && echo "$line" && update_rate && while :
do
read line
update_rate
echo ",[{\"full_text\":\"${rate}\" },${line#,\[}" || exit 1
done)
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