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#!/usr/bin/env bash |
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# Get the default interface used for routing |
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INTERFACE=$(ip route 2>/dev/null | grep '^default' | awk '{print $5}' | head -1) |
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if [ -z "$INTERFACE" ]; then |
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echo '{"text": " No net", "tooltip": "No network connection"}' |
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exit 0 |
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fi |
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# Get IPv4 address of the interface |
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IP=$(ip -4 addr show "$INTERFACE" 2>/dev/null | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | head -1) |
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if [ -z "$IP" ]; then |
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echo '{"text": " No IP", "tooltip": "Interface '"$INTERFACE"' has no IP"}' |
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exit 0 |
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fi |
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# Determine interface type and set appropriate icon |
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if [[ "$INTERFACE" =~ ^(wlan|wlp) ]]; then |
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ICON="" # generic network icon (nerd font) |
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TYPE="WiFi" |
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elif [[ "$INTERFACE" =~ ^(eth|enp|eno|ens) ]]; then |
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ICON="" # generic network icon (nerd font) |
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TYPE="Ethernet" |
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else |
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ICON="" # generic network icon (nerd font) |
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TYPE="$INTERFACE" |
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fi |
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# --- Transfer rate calculation --- |
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# Path to sysfs statistics |
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RX_FILE="/sys/class/net/$INTERFACE/statistics/rx_bytes" |
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TX_FILE="/sys/class/net/$INTERFACE/statistics/tx_bytes" |
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STATE_FILE="/tmp/waybar-network-stats-$INTERFACE" |
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# Read current byte counters |
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NOW_RX=$(cat "$RX_FILE" 2>/dev/null) |
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NOW_TX=$(cat "$TX_FILE" 2>/dev/null) |
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NOW_TS=$(date +%s%N) # nanoseconds for precision |
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# Helper: format bytes/sec to human-readable |
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format_rate() { |
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local bytes_per_sec="$1" |
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if [ "$bytes_per_sec" -lt 0 ]; then |
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bytes_per_sec=0 |
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fi |
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if [ "$bytes_per_sec" -ge 1073741824 ]; then |
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awk -v n="$bytes_per_sec" 'BEGIN { printf "%.1fG", n / 1073741824 }' |
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elif [ "$bytes_per_sec" -ge 1048576 ]; then |
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awk -v n="$bytes_per_sec" 'BEGIN { printf "%.1fM", n / 1048576 }' |
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elif [ "$bytes_per_sec" -ge 1024 ]; then |
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awk -v n="$bytes_per_sec" 'BEGIN { printf "%.1fK", n / 1024 }' |
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else |
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awk -v n="$bytes_per_sec" 'BEGIN { printf "%.1fB", n }' |
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fi |
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} |
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RATE_DOWN="" |
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RATE_UP="" |
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if [ -f "$STATE_FILE" ]; then |
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# Read previous values: rx tx timestamp_ns |
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read -r PREV_RX PREV_TX PREV_TS < "$STATE_FILE" |
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if [ -n "$PREV_RX" ] && [ -n "$PREV_TX" ] && [ -n "$PREV_TS" ]; then |
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# Calculate time delta in seconds (nanosecond difference) |
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DELTA_NS=$((NOW_TS - PREV_TS)) |
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if [ "$DELTA_NS" -gt 0 ]; then |
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DELTA_RX=$((NOW_RX - PREV_RX)) |
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DELTA_TX=$((NOW_TX - PREV_TX)) |
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# bytes per second = delta_bytes / (delta_ns / 1e9) |
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RX_BPS=$(awk -v rx="$DELTA_RX" -v ns="$DELTA_NS" 'BEGIN { printf "%.0f", rx * 1000000000 / ns }') |
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TX_BPS=$(awk -v tx="$DELTA_TX" -v ns="$DELTA_NS" 'BEGIN { printf "%.0f", tx * 1000000000 / ns }') |
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if [ -n "$RX_BPS" ] && [ -n "$TX_BPS" ]; then |
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RATE_DOWN=$(format_rate "$RX_BPS") |
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RATE_UP=$(format_rate "$TX_BPS") |
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fi |
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fi |
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fi |
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fi |
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# Save current state for next run |
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echo "$NOW_RX $NOW_TX $NOW_TS" > "$STATE_FILE" |
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# --- Build output --- |
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if [ -n "$RATE_DOWN" ] && [ -n "$RATE_UP" ]; then |
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RATE_STR=" ↓${RATE_DOWN} ↑${RATE_UP}" |
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else |
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RATE_STR="" |
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fi |
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echo "{\"text\": \"<span size='x-large' rise='-1500'>$ICON</span> $INTERFACE $IP${RATE_STR}\", \"tooltip\": \"$TYPE: $INTERFACE — $IP | ↓ ${RATE_DOWN:-?}/s ↑ ${RATE_UP:-?}/s\"}"
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