Struct FatFs 

pub struct FatFs<R> { /* private fields */ }

A pure-Rust reader over a FAT12/16/32 volume.

Implementations

impl<R: Read + Seek> FatFs<R>

pub fn open(reader: R) -> Result<Self>

Open a FAT volume, auto-detecting the variant from the boot sector.

Fails loud if the boot sector is not a recognized FAT/exFAT filesystem.

pub fn variant(&self) -> FatVariant

The detected FAT variant.

pub fn geometry(&self) -> &Geometry

The resolved on-disk volume geometry (variant, sector/cluster sizes, FAT layout, and byte offsets). Useful to a forensic consumer that needs the raw layout the reader computed.

pub fn runs(&self, id: FileId) -> Result<Vec<(u64, u64)>>

Contiguous image byte runs (offset, len) backing node id’s data, merging physically adjacent clusters (the FAT12/16 fixed root is a single region run). Useful to a forensic consumer that needs the on-disk run list of a file or directory.

pub fn root(&self) -> FileId

The root directory handle.

pub fn read_dir(&self, id: FileId) -> Result<Vec<Node>>

List the entries of the directory id (allocated and deleted).

pub fn lookup(&self, dir: FileId, name: &[u8]) -> Result<Option<FileId>>

Resolve a single child of dir by name (allocated entries only).

pub fn meta(&self, id: FileId) -> Result<Node>

Resolve metadata for id.

pub fn read_at(&self, id: FileId, off: u64, buf: &mut [u8]) -> Result<usize>

Read up to buf.len() bytes at byte offset off within node id. Returns the number of bytes read (0 at or past the end of the data).