Add community scripts for i3blocks

.local/bin/i3scripts/contrib/bandwidth

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+################################
+# Shows bandwidth
+#
+# @param {String(tx|rx)} type: The bandwidth type to check
+# @return {Number(kB/s)}: Speed of the interface
+################################
+
+dir=$(dirname $0)
+source $dir/util.sh
+
+type=$BLOCK_INSTANCE
+
+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 + $n)
+done
+
+delta=$(calc "$cur - $prev")
+echo "$(calc "$delta / 1000") kB/s"
+
+# store result
+echo $cur > $file