Trait FileDescEnvironment 

pub trait FileDescEnvironment {
    type FileHandle;

    // Required methods
    fn file_desc(&self, fd: Fd) -> Option<(&Self::FileHandle, Permissions)>;
    fn set_file_desc(
        &mut self,
        fd: Fd,
        handle: Self::FileHandle,
        perms: Permissions,
    );
    fn close_file_desc(&mut self, fd: Fd);
}

An interface for setting and getting shell file descriptors.

Required Associated Types

type FileHandle

A file handle (or wrapper) to associate with shell file descriptors.

Required Methods

fn file_desc(&self, fd: Fd) -> Option<(&Self::FileHandle, Permissions)>

Get the permissions and a handle associated with an opened file descriptor.

fn set_file_desc( &mut self, fd: Fd, handle: Self::FileHandle, perms: Permissions, )

Associate a file descriptor with a given handle and permissions.

fn close_file_desc(&mut self, fd: Fd)

Treat the specified file descriptor as closed for the current environment.

Implementations on Foreign Types

impl<'a, T: ?Sized + FileDescEnvironment> FileDescEnvironment for &'a mut T

type FileHandle = <T as FileDescEnvironment>::FileHandle

fn file_desc(&self, fd: Fd) -> Option<(&Self::FileHandle, Permissions)>

fn set_file_desc( &mut self, fd: Fd, handle: Self::FileHandle, perms: Permissions, )

fn close_file_desc(&mut self, fd: Fd)

Implementors

impl FileDescEnvironment for TokioFileDescManagerEnv

type FileHandle = Arc<FileDesc>

impl<'a, E> FileDescEnvironment for EnvRestorer<'a, E>

where E: ?Sized + ExportedVariableEnvironment + FileDescEnvironment + UnsetVariableEnvironment, E::FileHandle: Clone, E::VarName: Clone, E::Var: Clone,

type FileHandle = <E as FileDescEnvironment>::FileHandle

impl<A, FM, L, V, EX, WD, B, N, ERR> FileDescEnvironment for Env<A, FM, L, V, EX, WD, B, N, ERR>

where FM: FileDescEnvironment, N: Hash + Eq,

type FileHandle = <FM as FileDescEnvironment>::FileHandle

impl<O, S, A> FileDescEnvironment for FileDescManagerEnv<O, S, A>

where S: FileDescEnvironment,

type FileHandle = <S as FileDescEnvironment>::FileHandle

impl<T: Clone + Eq> FileDescEnvironment for FileDescEnv<T>

type FileHandle = T