Argument validity gets checked about linux-serverbot HOT 4 CLOSED

function requirement_argument_validity {

    # amount of arguments less than one or more than two result in error
    if [ "${#}" -eq '0' ] || [ "${#}" -gt '2' ]; then
        error_invalid_option
    fi
}

        # other
        *)
            ARGUMENT_NONE='1'
            shift
            ;;

    elif [ "${ARGUMENT_NONE}" == '1' ]; then
        error_invalid_option
    fi

function requirement_argument_validity {

    # amount of arguments less than one or more than two result in error
    if [ "${ARGUMENTS}" -eq '0' ] || [ "${ARGUMENTS}" -gt '2' ]; then
        error_invalid_option
    fi

    # options are incompatible with features
    if [ "${ARGUMENT_OPTION}" == '1' ] && [ "${ARGUMENT_FEATURE}" == '1' ]; then
        error_invalid_option
    fi

    # options are incompatible with methods
    if [ "${ARGUMENT_OPTION}" == '1' ] && [ "${ARGUMENT_METHOD}" == '1' ]; then
        error_invalid_option
    fi
}

function requirement_argument_validity {
    # amount of arguments less than one or more than two result in error
    if [ "${ARGUMENTS}" -eq '0' ] || [ "${ARGUMENTS}" -gt '2' ]; then
        error_wrong_number_of_arguments
    fi

    # options are incompatible with features
    if [ "${ARGUMENT_OPTION}" == '1' ] && [ "${ARGUMENT_FEATURE}" == '1' ]; then
        error_options_cannot_be_combined
    fi

    # options are incompatible with methods
    if [ "${ARGUMENT_OPTION}" == '1' ] && [ "${ARGUMENT_METHOD}" == '1' ]; then
        error_options_cannot_be_combined
    fi

    # if there are two arguments, only a combination of feature and method is possible
    if [ "${ARGUMENTS}" -eq '2' ]; then
        # features require methods and vice versa, so they should add to two.
        ARGUMENT_FEATURE_AND_METHOD="$((${ARGUMENT_FEATURE}+${ARGUMENT_METHOD}))"
        # and otherwise result in an error
        if [ "${ARGUMENT_FEATURE_AND_METHOD}" -ne '2' ]; then
            error_no_feature_and_method
        fi
    fi
}