#!/bin/sh
directory=/volume1/multimedia/Internet\ Radio\ Recordings/
runtimeInSeconds=$((20*3))
endSeconds=$((SECONDS + runtimeInSeconds))

echo "Beginning..."

while [ $SECONDS -lt $endSeconds ]; do
    fileName="TEST-"$(date +"%m-%d-%Y-%H%M(%S)")
    wget http://144.217.153.67/sj128.mp3 --timeout=1 --waitretry=0 --tries=1 -O "$directory$fileName.mp3" -q&
    nWgetPID=$!

    echo "Filename "$fileName" created with process "$nWgetPID

    # “kill -0 "$nWgetPID"” returns a process ID until...
    while kill -0 "$nWgetPID" >/dev/null 2>&1; do
        if [ $SECONDS -gt $endSeconds ]
        then
            echo killing the PID
            kill "$nWgetPID"
        else #the purpose here is to make sure it restarts the file when the PID dies prematurely
            if [ $SECONDS -gt 20 ]
            then
                kill "$nWgetPID"
            fi
        fi
        # runs every second
        # while loop ends when PID is killed
            #echo $SECONDS
            #echo kill -0 "$nWgetPID"
        sleep 5
    done
done

echo "Done. Reached "$endSeconds