1 files changed, 82 insertions, 0 deletions
diff --git a/config/i3blocks/scripts/bandwidth b/config/i3blocks/scripts/bandwidth
new file mode 100755
index 0000000..cfefaf2
--- /dev/null
+++ b/config/i3blocks/scripts/bandwidth
@@ -0,0 +1,82 @@
+#!/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/>.
+
+INTERFACE=$(ip route | awk '/^default .* (wlp|enp)/ { print $5 ; exit }')
+
+# Issue #36 compliant.
+if ! [ -e "/sys/class/net/${INTERFACE}/operstate" ] || ! [ "`cat /sys/class/net/${INTERFACE}/operstate`" = "up" ]
+then
+    exit 0
+fi
+
+# path to store the old results in
+path="/dev/shm/$(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