Shell function to check if website has changed version 2

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### usage: webch [-ciqr] url
### usage: webch [-i INTERVAL] [-r REPEAT] [-q] [-c "COMMAND(S) TO EXECUTE"] url
### options:
### -i, --interval : time (in seconds) to wait between downloads/page checks  (default=30)
### -r, --repeat : how many times to repeat (ie. how many changes till exit) (default=1)
### -q, --quiet : turns off beep after each change
### -c, --command : command(s) to execute after each change (default=echo "It changed!")
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#
#
function webch(){

    inter=30
    repeat=1
    beep=true
    com='echo "It changed!"'
    OPTS=`getopt -o qi:r:-c: -l quiet,interval:,repeat:,command: -- "$@"`

    if [ $? -ne 0 ];
    then

        return 1

    fi

    eval set -- "$OPTS"

    while true ; do
        case "$1" in
            -q|--quiet) beep=false; shift;;
            -i|--interval) inter=$2 ; shift 2;;
            -r|--repeat) repeat=$2; shift 2;;
            -c|--command) com=$2; shift 2;;
            --) shift; break;;
            *) break;;
        esac
    done
    url=$1                  #Passing the first leftover argument to the variable url

    f1=/tmp/.`mcookie`
    f2=/tmp/.`mcookie`

    wget -q -O $f1 $url

while [ $repeat -ne 0 ]; do

    tmp=0                   #Setting tmp to 0
    while [ $tmp -eq 0 ] ; do
        sleep $inter            #Waiting before fetching the page
        wget -q -O $f2 $url     #Fetching page
        cmp -s $f1 $f2          #Checking first fetch vs last. cmp exits with 0 if files are the same, 1 if they are different
        tmp=$?              #Setting what cmp exited with to tmp
        echo whileloop
    done
    rm $f1
    f1=$f2
    f2=/tmp/.`mcookie`
    if [ $tmp -gt 1 ]           #Checks if cmp gave an error
    then
        echo "An error occured"
        return $tmp
    fi

    if $beep;
    then
        echo -en "\007"
    fi
    eval $com

    let repeat=repeat-1
done

    rm $f1              #removing files that are nolonger needed
    return 0
}
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