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#!/bin/sh
# Network speed monitor with fixed-width output for waybar
# Outputs JSON with upload/download speeds padded to consistent width
INTERFACE=$(ip route | awk '/default/ {print $5; exit}')
if [ -z "$INTERFACE" ]; then
echo '{"text": "No network", "class": "disconnected"}'
exit 0
fi
RX1=$(cat /sys/class/net/$INTERFACE/statistics/rx_bytes)
TX1=$(cat /sys/class/net/$INTERFACE/statistics/tx_bytes)
sleep 1
RX2=$(cat /sys/class/net/$INTERFACE/statistics/rx_bytes)
TX2=$(cat /sys/class/net/$INTERFACE/statistics/tx_bytes)
RX_RATE=$((RX2 - RX1))
TX_RATE=$((TX2 - TX1))
format_speed() {
local bytes=$1
if [ $bytes -ge 1073741824 ]; then
printf "%6.2f G" $(echo "scale=2; $bytes / 1073741824" | bc)
elif [ $bytes -ge 1048576 ]; then
printf "%6.2f M" $(echo "scale=2; $bytes / 1048576" | bc)
elif [ $bytes -ge 1024 ]; then
printf "%6.2f K" $(echo "scale=2; $bytes / 1024" | bc)
else
printf "%6d B" $bytes
fi
}
UP=$(format_speed $TX_RATE)
DOWN=$(format_speed $RX_RATE)
# Get IP for tooltip
IP=$(ip -4 addr show $INTERFACE | awk '/inet / {print $2}')
# Check if WiFi and get SSID
SSID=""
if command -v iwgetid >/dev/null 2>&1; then
SSID=$(iwgetid -r 2>/dev/null)
fi
if [ -n "$SSID" ]; then
TOOLTIP="$SSID ($INTERFACE: $IP)"
else
TOOLTIP="$INTERFACE: $IP"
fi
echo "{\"text\": \"${UP} ${DOWN} \", \"tooltip\": \"$TOOLTIP\", \"class\": \"connected\"}"
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