The highest tagged major version is v2.

vfat

package

v0.4.3 Latest Latest Go to latest Published: Feb 13, 2023 License: MPL-2.0 Imports: 6 Imported by: 0

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Valid go.mod file
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Stable version
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Repository

github.com/siderolabs/go-blockdevice

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Documentation ¶

Overview ¶

Package vfat provides functions for working with the VFAT filesystem.

Index ¶

Constants
type File
- func (f *File) Read(p []byte) (int, error)
- func (f *File) Seek(offset int64, whence int) (int64, error)
type FileSystem
- func NewFileSystem(f io.ReaderAt, sb *SuperBlock) (*FileSystem, error)
- func (fs *FileSystem) Open(path string) (*File, error)
type Option
- func WithLabel(o string) Option
type Options
- func NewDefaultOptions(setters ...Option) *Options
type SuperBlock

Constants ¶

View Source

const (
	// Magic is the VFAT magic signature.
	Magic = "FAT32"
)

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type File ¶

type File struct {
	// contains filtered or unexported fields
}

File represents a VFAT backed file.

func (*File) Read ¶

func (f *File) Read(p []byte) (int, error)

func (*File) Seek ¶

func (f *File) Seek(offset int64, whence int) (int64, error)

Seek sets the offset for the next Read or Write on file to offset, interpreted according to whence: 0 means relative to the origin of the file, 1 means relative to the current offset, and 2 means relative to the end. It returns the new offset and an error, if any.

type FileSystem ¶

type FileSystem struct {
	// contains filtered or unexported fields
}

FileSystem provides simple way to read files from FAT32 filesystems.

This code is far from being production quality, it might break if filesystem is corrupted or is not actually FAT32.

func NewFileSystem ¶

func NewFileSystem(f io.ReaderAt, sb *SuperBlock) (*FileSystem, error)

NewFileSystem initializes Filesystem, reads FAT.

func (*FileSystem) Open ¶

func (fs *FileSystem) Open(path string) (*File, error)

Open the file as read-only stream on the filesystem.

type Option ¶

type Option func(*Options)

Option is the functional option func.

func WithLabel ¶

func WithLabel(o string) Option

WithLabel sets the filesystem label.

type Options ¶

type Options struct {
	Label string
}

Options is the functional options struct.

func NewDefaultOptions ¶

func NewDefaultOptions(setters ...Option) *Options

NewDefaultOptions initializes a Options struct with default values.

type SuperBlock ¶

type SuperBlock struct {
	Ignored      [3]uint8
	Sysid        [8]uint8
	SectorSize   [2]uint8
	ClusterSize  uint8
	Reserved     [2]uint8
	Fats         uint8
	DirEntries   [2]uint8
	Sectors      [2]uint8
	Media        uint8
	FatLength    uint16
	SecsTrack    uint16
	Heads        uint16
	Hidden       uint32
	TotalSect    uint32
	Fat32Length  [4]uint8
	Flags        uint16
	Version      [2]uint8
	RootCluster  [4]uint8
	FsinfoSector uint16
	BackupBoot   uint16
	Reserved2    [6]uint16
	Unknown      [3]uint8
	Serno        [4]uint8
	Label        [11]uint8
	Magic        [8]uint8
	Dummy2       [0x1fe - 0x5a]uint8
	Pmagic       [2]uint8
}

SuperBlock represents the vfat super block.

func (*SuperBlock) Encrypted ¶

func (sb *SuperBlock) Encrypted() bool

Encrypted implements the SuperBlocker interface.

func (*SuperBlock) Is ¶

func (sb *SuperBlock) Is() bool

Is implements the SuperBlocker interface.

func (*SuperBlock) Offset ¶

func (sb *SuperBlock) Offset() int64

Offset implements the SuperBlocker interface.

func (*SuperBlock) Type ¶

func (sb *SuperBlock) Type() string

Type implements the SuperBlocker interface.

Source Files ¶

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