retry.sh

function retry() {
    # retry [--limit,-l] [--delay,-d] [--] command args..
    [ $# -lt 1 ] && echo "return [-ld] [--] commands [args...]" >&2 && return

    LIMIT=5
    DELAY=5
    while [[ $# > 0 ]]; do
        case $1 in
            --limit|-l)
                shift
                LIMIT=$1
                ;;
            --delay|-d)
                shift
                DELAY=$1
                ;;
            --)
                shift
                break
                ;;
            *)
                break
                ;;
        esac
        shift
    done
    command=$1;shift
    args="$*"

    success=1
    while true; do
        $command $args
        success=$?
        [ $success -eq 0 ] && break
        let LIMIT--
        [ $LIMIT -lt 1 ] && break
        sleep $DELAY
    done
}

retry() { while true; do $* && break || sleep 10; done }