Struct FileReader 

pub struct FileReader { /* private fields */ }

An open read-only file. Renaming or unlinking its path never redirects reads. Reads return what’s on disk, as the platform’s own positioned reads do.

Implementations

impl FileReader

pub fn size(&self) -> u64

The size captured on this open handle.

pub fn read_at( &self, offset: u64, len: usize, ) -> Result<Vec<u8>, ObservationError>

Read exactly the requested bytes using the open file’s positioned-read API. A range beyond the captured size fails instead of returning a short read, and a file found shorter than that range fails as changed.