i3blocks up down + scripts

# i3blocks.conf

[upload]
label=
command=~/.config/i3/scripts/bandwidth.sh tx
min_width=0000 kB/s
align=left
interval=1 # IMPORTANT
#border=#062e48

[download]
label=
command=~/.config/i3/scripts/bandwidth.sh rx
min_width=0000 kB/s
align=left
interval=1 # IMPORTANT
#border=#3b3563


##################################
#Script bash
#!/bin/bash
TYPE=$1
if [ "$1" != "rx" -a "$1" != "tx" ]; then
echo "Invalid argument: $1" 1>&2
echo "Must be 'tx' or 'rx'" 1>&2
echo "Usage: $0 (rx|tx)" 1>&2
exit 1
fi
FILE=/tmp/i3blocks_bandwidth_$TYPE
touch $FILE
PREV=$(cat $FILE)
CUR=0
NETDIR=/sys/class/net
for IFACE in $(ls -1 $NETDIR); do
# Skip the loopback interface
if [ "$IFACE" == "lo" ]; then
continue
fi
F=$NETDIR/$IFACE/statistics/${TYPE}_bytes
N=$(cat $F)
CUR=$(expr $CUR + $N)
done
delta=$(expr $CUR - $PREV)
echo $(expr $delta / 1000) kB/s
echo $CUR > $FILE