Struct OpenFile 

pub struct OpenFile { /* private fields */ }

An open file handle.

Implementations

impl OpenFile

pub fn new( scheme: DynScheme, file_id: u64, path: String, open_flags: OpenFlags, file_flags: FileFlags, size: Option<u64>, ) -> Self

Create a new open file.

pub fn read(&self, buf: &mut [u8]) -> Result<usize, SyscallError>

Read from the file at current offset, advancing the offset.

pub fn write(&self, buf: &[u8]) -> Result<usize, SyscallError>

Write to the file at current offset, advancing the offset.

pub fn pread(&self, offset: u64, buf: &mut [u8]) -> Result<usize, SyscallError>

Read at a specific offset without changing current offset (pread).

pub fn pwrite(&self, offset: u64, buf: &[u8]) -> Result<usize, SyscallError>

Write at a specific offset without changing current offset (pwrite).

pub fn seek(&self, new_offset: u64) -> Result<u64, SyscallError>

Seek to a new offset (absolute).

pub fn lseek(&self, off: i64, whence: u32) -> Result<u64, SyscallError>

POSIX lseek: whence=0 SET, 1 CUR, 2 END.

pub fn tell(&self) -> u64

Get current offset.

pub fn size(&self) -> Result<u64, SyscallError>

Get file size.

pub fn sync(&self) -> Result<(), SyscallError>

Sync file to storage.

pub fn close(&self) -> Result<(), SyscallError>

Signal that this file descriptor is being closed.

Does NOT call scheme.close() directly; the actual scheme close is deferred to the Drop impl so it fires only when the last Arc is released (POSIX: scheme is closed when all dup’d/fork’d copies are gone).

pub fn flags(&self) -> FileFlags

Get file flags.

pub fn open_flags(&self) -> OpenFlags

Get open flags.

pub fn path(&self) -> &str

Get path (for debugging).

pub fn stat(&self) -> Result<FileStat, SyscallError>

Get file metadata.

pub fn readdir(&self) -> Result<Vec<DirEntry>, SyscallError>

List directory entries (only valid for directories).

pub fn file_id(&self) -> u64

Get internal file_id (for scheme delegation).

pub fn scheme(&self) -> &DynScheme

Get the underlying scheme.

Trait Implementations

impl Drop for OpenFile

fn drop(&mut self)

Performs the drop operation.