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path: root/.local/bin/statusbar/sb-nettraf
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#!/bin/sh

# Module showing network traffic. Shows how much data has been received (RX) or
# transmitted (TX) since the previous time this script ran. So if run every
# second, gives network traffic per second.

case $BLOCK_BUTTON in
  3) notify-send "🌐 Network traffic module" "🔻: Traffic received
🔺: Traffic transmitted" ;;
  8) setsid -f "$TERMINAL" -e "$EDITOR" "$0" >/dev/null 2>&1 ;;
esac

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)