Struct FileDescriptorTable 

pub struct FileDescriptorTable { /* private fields */ }

Per-process file descriptor table.

Implementations

impl FileDescriptorTable

pub fn new() -> Self

Create a new empty FD table.

pub fn insert(&mut self, file: Arc<OpenFile>) -> u32

Insert an open file and return its FD number.

pub fn insert_at(&mut self, fd: u32, file: Arc<OpenFile>)

Insert a file at a specific FD (for stdin/stdout/stderr).

pub fn insert_with_flags(&mut self, file: Arc<OpenFile>, cloexec: bool) -> u32

Insert a file with explicit CLOEXEC flag.

pub fn get(&self, fd: u32) -> Result<Arc<OpenFile>, SyscallError>

Get an open file by FD.

pub fn get_cloexec(&self, fd: u32) -> Result<bool, SyscallError>

Get the CLOEXEC flag for a file descriptor.

pub fn set_cloexec( &mut self, fd: u32, cloexec: bool, ) -> Result<(), SyscallError>

Set the CLOEXEC flag for a file descriptor.

pub fn remove(&mut self, fd: u32) -> Result<Arc<OpenFile>, SyscallError>

Remove an FD and return the file.

pub fn contains(&self, fd: u32) -> bool

Check if an FD exists.

pub fn duplicate(&mut self, old_fd: u32) -> Result<u32, SyscallError>

Duplicate an FD (fork/dup semantics).

pub fn duplicate_from( &mut self, old_fd: u32, min_fd: u32, ) -> Result<u32, SyscallError>

Duplicate an FD with a minimum target FD number (F_DUPFD semantics).

pub fn duplicate_to( &mut self, old_fd: u32, new_fd: u32, ) -> Result<u32, SyscallError>

Duplicate old_fd onto new_fd (dup2 semantics).

pub fn close_all(&mut self)

Close all file descriptors (process exit).

pub fn close_cloexec(&mut self)

Close all file descriptors with CLOEXEC flag (execve cleanup).

pub fn clone_for_fork(&self) -> Self

Clone this FD table (fork semantics).

All descriptors are copied, including those with CLOEXEC. CLOEXEC only takes effect at exec-time via close_cloexec().

Trait Implementations

impl Default for FileDescriptorTable

fn default() -> Self

Builds a default instance.