#!/bin/bash # interface to watch interface=eno1 # threshold packet count under which the script assumes IDLE threshold=100 ####################################################################### ### DO NOT CHANGE ANYTHING BELOW THIS LINE ############################ countfile="/tmp/lightsout_${interface}_count" printf "Interface:\t\t$interface\n" if [[ -f $countfile ]] then changed=`date -r $countfile +%s` printf "Last record:\t\t$(date -d @$changed)\n" else printf 0 > $countfile fi sent=`cat /sys/class/net/$interface/statistics/tx_packets` received=`cat /sys/class/net/$interface/statistics/rx_packets` let "total = $sent + $received" let "difference = $total - $(cat $countfile)" printf "Total packets Rx+Tx:\t$total\n" if (( "$difference" > "$threshold" )); then printf "Packet count:\t\t$difference\n" printf $total > $countfile else let "datediff = $(date +%s) - $changed" printf "IDLE seconds:\t\t$datediff\n" if (( "$datediff" > 3600 )); then rm $countfile printf "suspending...\n" systemctl suspend fi fi