throwback.sh

#!/bin/sh

wget https://upload.wikimedia.org/wikipedia/commons/3/33/Dial_up_modem_noises.ogg -O dial_up.ogg --no-clobber --quiet

online=true
while true
do
    now_online=false
    if ping -c 1 google.com >> /dev/null 2>&1; then
        now_online=true
    fi

    if ! $online && $now_online; then
        date +"%F %R | connection is back up"
        ogg123 dial_up.ogg --skip 1 --end 17 --quiet --ntimes 1.5
    fi

    if ! $now_online && $online; then
        date +"%F %R | connection went down"
    fi

    online=$now_online
    sleep 3
done