monitorio - Bash function to monitor the size of a file on disk

monitorio - Bash function to monitor the size of a file on disk

# Show write speed for file or directory
# Optional second parameter to set the check interval in seconds, defaults to 20
monitorio () {
    target="$1"
    interval=${2:-"20"}
    echo -e "Checking every ${interval} seconds"
    size=$(du -ks "$target" | awk '{print $1}')
    firstrun="1"
    echo ""
    while [ 1 ]; do
        prevsize=$size
        size=$(du -ks "$target" | awk '{print $1}')
        #size=$(ls -l "$1"  | awk '{print $5/1024}')
        kb=$((${size} - ${prevsize}))
        kbmin=$((${kb}* (60/${interval}) ))
        kbsec=$((${kbmin}/60))
        kbhour=$((${kbmin}*60))
        if [ $firstrun -ne 1 ]; then
            echo -e "\e[1A $target changed ${kb}KB ${kbsec}KB/sec ${kbmin}KB/min ${kbhour}KB/hour size: ${size}KB"
        fi  
        firstrun=0
        sleep $interval
    done
}