basic connection check

connection_check.sh

#!/bin/bash
connection_stat="unknown"
logfile=$(pwd)/connection_check.log

connected() {
        if [ !  "$connection_stat" == "connected" ]
        then
                connection_stat="connected"
                date=$(date)
                echo "Connected at $date"
                echo "Connected at $date" >> $logfile
        fi
}

disconnected() {
        if [ "$connection_stat" == "connected" ]
        then
                connection_stat="disconnected"
                date=$(date)
                echo "Connection is lost at $date"
                echo "Connection is lost at $date" >> $logfile
        fi
}

while true
do
        ping  1.1.1.1 -W 1 -c 2 -q > /dev/null && connected || disconnected
        #sleep 1
done