bandwidth monitor script for i3blocks

bandwidth.sh

#!/bin/bash

if [ "$1" != "" ]; then
    echo "Missing required argument: 'tx' or 'rx'" 1>&2
    exit 1
fi
if [ "$1" != "rx" -a "$1" != "tx" ]; then
    echo "Invalid argument: $1" 1>&2
    echo "Usage: $0 (rx|tx)" 1>&2
    exit 1
fi

DIRECTION=$1
TMPFILE=/dev/shm/i3blocks_bandwidth_$DIRECTION
touch $TMPFILE

PREV=$(cat $TMPFILE)
NETDIR=/sys/class/net
IFACE=$(ip r | grep default | cut -d' ' -f5)
FILE=$NETDIR/$IFACE/statistics/${DIRECTION}_bytes
CUR=$(cat $FILE)
DELTA=$(expr $CUR - $PREV)

echo $(expr $DELTA / 1000) kB/s

echo $CUR > $TMPFILE
                                                                                             

Hey @joehillen,

In case you haven't heard, i3blocks is splitting into two repos! i3blocks will now go on to contain the core binary and a set of smallest usable blocklets to provide some beginner functionality. From i3blocks, i3blocks-contrib has now split off to gather the community contributed blocklets in a single repo to make perusing them easier and more convenient. We would be honoured if you would consider submitting your blocklet(s) to the contrib repo.

This change is the core change scheduled for the v1.5 release. Please note that as an artifact of this split, your entry for this blocklet in the core wiki has been removed as has everyone else's. If you would like to submit your blocklet, please review the contrib wiki to understand the workflow of i3blocks-contrib.

Please note that this change over is in its early stages, so the process for submission hasn't been completely nailed down. We're hard at work still compiling the two project wikis and documenting all changes and standards. It is very likely that things will still change and we value your input on how that change should occur.

Deepest regrads,

@Nycroth