Root commit.

sb-net

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+update() {
+    sum=0
+    for arg; do
+        read -r i < "$arg"
+        sum=$(( sum + i ))
+    done
+    cache=/tmp/${1##*/}
+    [ -f "$cache" ] && read -r old < "$cache" || old=0
+    printf %d\\n "$sum" > "$cache"
+    printf %d\\n $(( sum - old ))
+}
+
+rx=$(update /sys/class/net/[ew]*/statistics/rx_bytes)
+tx=$(update /sys/class/net/[ew]*/statistics/tx_bytes)
+
+printf "%4sB ↕ %4sB\\n" $(numfmt --to=iec $rx $tx)