67 lines
1.7 KiB
Bash
Executable File
67 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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COUNTER_FILE=/dev/shm/polybar_network_usage
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REFRESH=2
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get_icon_by_device()
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{
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device=$1
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device_type=$(nmcli -t device status | grep -E -m 1 "^$device" | cut -f 2 -d ":")
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case "$device_type" in
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ethernet)
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icon=""
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;;
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wifi)
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ssid=$(nmcli -t device status | grep -E -m 1 "^$device" | cut -f 4 -d ":")
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icon=" $ssid"
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;;
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*)
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icon=""
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;;
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esac
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echo $icon
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}
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while true; do
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default_device=$(ip route list | grep -Fm 1 default | cut -d " " -f 5)
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icon=$(get_icon_by_device "$default_device")
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now=$(date +%s)
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counter_age=$(stat --format %Z $COUNTER_FILE 2>/dev/null)
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if [ -f $COUNTER_FILE ] && [ $((now-counter_age)) -lt $((REFRESH+1)) ]; then
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last_value_in=$(cut -f 1 -d " " $COUNTER_FILE)
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last_value_out=$(cut -f 2 -d " " $COUNTER_FILE)
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fi
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current_values=$(awk -v dev="${default_device}:" '{
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if ($1 == dev) print $2,$10
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}' < /proc/net/dev)
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current_bytes_in=$(echo "$current_values" | cut -f 1 -d " ")
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current_bytes_out=$(echo "$current_values" | cut -f 2 -d " ")
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if [ -n "$last_value_in" ]; then
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bits_in=$((((current_bytes_in-last_value_in) / REFRESH) * 8))
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bits_out=$((((current_bytes_out-last_value_out) / REFRESH) * 8))
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output=$(LANG=C numfmt --to iec --format "%8.2f" "$bits_in" "$bits_out" \
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| tr -d "\n" 2>/dev/null)
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if ! echo "$output" | grep -qE '[0-9]{1,3}\.[0-9]{1,3}([K,M,G,B])?$'; then
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output=" 0.01 0.01"
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fi
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echo "$icon $output"
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else
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echo "$icon -- --"
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fi
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echo "$current_values">$COUNTER_FILE
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unset last_value
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sleep $REFRESH
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done
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