recovery

func Fetch(
	reader config.DriveReaderConfig,
	mt config.MagneticTapeIO,
	pipes config.PipeConfig,
	crypto config.CryptoConfig,

	getDst func(path string, mode fs.FileMode) (io.WriteCloser, error),
	mkdirAll func(path string, mode fs.FileMode) error,

	record int,
	block int,
	to string,
	preview bool,

	onHeader func(hdr *config.Header),
) error

func Index(
	reader config.DriveReaderConfig,
	mt config.MagneticTapeIO,
	metadata config.MetadataConfig,
	pipes config.PipeConfig,
	crypto config.CryptoConfig,

	record int,
	block int,
	overwrite bool,
	initializing bool,
	offset int,

	decryptHeader func(
		hdr *tar.Header,
		i int,
	) error,
	verifyHeader func(
		hdr *tar.Header,
		isRegular bool,
	) error,

	onHeader func(hdr *config.Header),
) error

func Query(
	reader config.DriveReaderConfig,
	mt config.MagneticTapeIO,
	pipes config.PipeConfig,
	crypto config.CryptoConfig,

	record int,
	block int,

	onHeader func(hdr *config.Header),
) ([]*tar.Header, error)