Shell function to repeat command

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### usage: rptr [-irc] commands
### usage: rptr [-i INTERVAL] [-r REPEAT] [-c] commands
### options:
### -i, --interval : time (in seconds) between repetions (default=2)
### -r, --repeat : number of times to repeat (default=indefinite)
### -c, --clear : clear output after each iteration
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#
#
function rptr(){
    interval=2
    repeat=0
    clr=false
    OPTS=`getopt -o ci:r: -l clear,interval:,repeat: -- "$@"`

    if [ $? -ne 0 ];
        then
                return 1
        fi

    eval set -- "$OPTS"

    while true ; do
        case "$1" in
            -i|--interval) interval=$2; shift 2;;
            -r|--repeat) repeat=$2; shift 2;;
            -c|--clear) clr=true; shift;;
            --) shift; break;;
            *) break;;
        esac
    done
    if [ $repeat -lt 1 ];
    then
        while true; do
            ${@:1}
            sleep $interval
        if $clr
        then
            clear
        fi
        done
    else
        tmp=0
        while [ $tmp -lt $repeat ]; do
            ${@:1}
            sleep $interval
        if $clr
        then
            clear
        fi
            let tmp=tmp+1
        done
    fi
}
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