113 lines
3.5 KiB
Bash
Executable File
113 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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INTERFACE="br0"
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TEMP_FILE="/tmp/waybar_network_$INTERFACE"
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MAX_AGE=10
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# Function to format bytes/s to human readable with max 2 digits
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format_rate() {
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local rate=$1
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local unit="K"
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local value
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# Convert to KB/s first
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value=$(( (rate * 10) / 1024 ))
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# If KB/s would be >= 1000 (100.0K), convert to MB/s
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if [ $value -ge 1000 ]; then
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unit="M"
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value=$(( (rate * 10) / 1048576 )) # 1024*1024
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# If MB/s would be >= 1000 (100.0M), convert to GB/s
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if [ $value -ge 1000 ]; then
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unit="G"
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value=$(( (rate * 10) / 1073741824 )) # 1024*1024*1024
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fi
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fi
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# Split into whole and decimal parts
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local whole=$((value / 10))
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local decimal=$((value % 10))
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# Format with appropriate spacing
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if [ $whole -lt 10 ]; then
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printf "%d.%d%s" "$whole" "$decimal" "$unit"
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else
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printf "%2d%s" "$whole" "$unit"
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fi
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}
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# Check if interface exists
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if [ ! -d "/sys/class/net/$INTERFACE" ]; then
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echo '{"text":" No Interface","tooltip":"Interface '$INTERFACE' not found"}'
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exit 1
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fi
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# Get current values
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RX_BYTES=$(cat /sys/class/net/$INTERFACE/statistics/rx_bytes)
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TX_BYTES=$(cat /sys/class/net/$INTERFACE/statistics/tx_bytes)
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CURRENT_TIME=$(date +%s)
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# Check if temp file exists and is recent
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TEMP_FILE_VALID=0
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if [ -f "$TEMP_FILE" ]; then
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read PREV_RX PREV_TX PREV_TIME < "$TEMP_FILE"
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TIME_DIFF=$((CURRENT_TIME - PREV_TIME))
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# Accept temp file if it's recent (0 seconds is OK, negative or too old is not)
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if [ $TIME_DIFF -ge 0 ] && [ $TIME_DIFF -le $MAX_AGE ]; then
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TEMP_FILE_VALID=1
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fi
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fi
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# If no valid temp file, initialize
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if [ $TEMP_FILE_VALID -eq 0 ]; then
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echo "$RX_BYTES $TX_BYTES $CURRENT_TIME" > "$TEMP_FILE"
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echo '{"text":"'${INTERFACE}' ↑0.0K ↓0.0K","tooltip":"Upload: 0.0 KB/s\\nDownload: 0.0 KB/s"}'
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exit 0
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fi
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# If TIME_DIFF is 0, return the last calculated result without updating temp file
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if [ $TIME_DIFF -eq 0 ]; then
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# Try to read cached result from a secondary file
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CACHE_FILE="/tmp/waybar_network_cache_$INTERFACE"
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if [ -f "$CACHE_FILE" ]; then
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cat "$CACHE_FILE"
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exit 0
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else
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# No cache, show 0.0K
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echo '{"text":"'${INTERFACE}' ↑0.0K ↓0.0K","tooltip":"Upload: 0.0 KB/s\\nDownload: 0.0 KB/s"}'
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exit 0
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fi
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fi
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# Calculate rates (bytes per second)
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RX_RATE=$(( (RX_BYTES - PREV_RX) / TIME_DIFF ))
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TX_RATE=$(( (TX_BYTES - PREV_TX) / TIME_DIFF ))
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# Handle negative values (counter reset) or unrealistic high values
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if [ $RX_RATE -lt 0 ] || [ $RX_RATE -gt 1073741824 ]; then RX_RATE=0; fi
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if [ $TX_RATE -lt 0 ] || [ $TX_RATE -gt 1073741824 ]; then TX_RATE=0; fi
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# Format rates with auto-scaling
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TX_FORMATTED=$(format_rate $TX_RATE)
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RX_FORMATTED=$(format_rate $RX_RATE)
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# Calculate tooltip values (always in KB/s for consistency)
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RX_KB_TENTHS=$(( (RX_RATE * 10) / 1024 ))
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TX_KB_TENTHS=$(( (TX_RATE * 10) / 1024 ))
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RX_WHOLE=$((RX_KB_TENTHS / 10))
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RX_DECIMAL=$((RX_KB_TENTHS % 10))
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TX_WHOLE=$((TX_KB_TENTHS / 10))
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TX_DECIMAL=$((TX_KB_TENTHS % 10))
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# Format output with auto-scaled units
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RESULT=$(printf '{"text":"'${INTERFACE}' ↑%4s ↓%4s","tooltip":"Upload: %d.%d KB/s\\nDownload: %d.%d KB/s"}' \
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"$TX_FORMATTED" "$RX_FORMATTED" \
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"$TX_WHOLE" "$TX_DECIMAL" "$RX_WHOLE" "$RX_DECIMAL")
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echo "$RESULT"
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# Store current values for next iteration AND cache the result
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echo "$RX_BYTES $TX_BYTES $CURRENT_TIME" > "$TEMP_FILE"
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echo "$RESULT" > "/tmp/waybar_network_cache_$INTERFACE"
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