Struct mio::net::UnixStream

pub struct UnixStream { /* private fields */ }

A non-blocking Unix stream socket.

Implementations

impl UnixStream

pub fn connect<P: AsRef<Path>>(path: P) -> Result<UnixStream>

Connects to the socket named by path.

This may return a WouldBlock in which case the socket connection cannot be completed immediately. Usually it means the backlog is full.

pub fn from_std(stream: UnixStream) -> UnixStream

Creates a new UnixStream from a standard net::UnixStream.

This function is intended to be used to wrap a Unix stream from the standard library in the Mio equivalent. The conversion assumes nothing about the underlying stream; it is left up to the user to set it in non-blocking mode.

Note

The Unix stream here will not have connect called on it, so it should already be connected via some other means (be it manually, or the standard library).

pub fn pair() -> Result<(UnixStream, UnixStream)>

Creates an unnamed pair of connected sockets.

Returns two UnixStreams which are connected to each other.

pub fn local_addr(&self) -> Result<SocketAddr>

Returns the socket address of the local half of this connection.

pub fn peer_addr(&self) -> Result<SocketAddr>

Returns the socket address of the remote half of this connection.

pub fn take_error(&self) -> Result<Option<Error>>

Returns the value of the SO_ERROR option.

pub fn shutdown(&self, how: Shutdown) -> Result<()>

Shuts down the read, write, or both halves of this connection.

This function will cause all pending and future I/O calls on the specified portions to immediately return with an appropriate value (see the documentation of Shutdown).

pub fn try_io<F, T>(&self, f: F) -> Result<T>where
    F: FnOnce() -> Result<T>,

Execute an I/O operation ensuring that the socket receives more events if it hits a WouldBlock error.

Notes

This method is required to be called for all I/O operations to ensure the user will receive events once the socket is ready again after returning a WouldBlock error.

Examples

use std::io;
use std::os::unix::io::AsRawFd;
use mio::net::UnixStream;

let (stream1, stream2) = UnixStream::pair()?;

// Wait until the stream is writable...

// Write to the stream using a direct libc call, of course the
// `io::Write` implementation would be easier to use.
let buf = b"hello";
let n = stream1.try_io(|| {
    let buf_ptr = &buf as *const _ as *const _;
    let res = unsafe { libc::send(stream1.as_raw_fd(), buf_ptr, buf.len(), 0) };
    if res != -1 {
        Ok(res as usize)
    } else {
        // If EAGAIN or EWOULDBLOCK is set by libc::send, the closure
        // should return `WouldBlock` error.
        Err(io::Error::last_os_error())
    }
})?;
eprintln!("write {} bytes", n);

// Wait until the stream is readable...

// Read from the stream using a direct libc call, of course the
// `io::Read` implementation would be easier to use.
let mut buf = [0; 512];
let n = stream2.try_io(|| {
    let buf_ptr = &mut buf as *mut _ as *mut _;
    let res = unsafe { libc::recv(stream2.as_raw_fd(), buf_ptr, buf.len(), 0) };
    if res != -1 {
        Ok(res as usize)
    } else {
        // If EAGAIN or EWOULDBLOCK is set by libc::recv, the closure
        // should return `WouldBlock` error.
        Err(io::Error::last_os_error())
    }
})?;
eprintln!("read {} bytes", n);

Trait Implementations

impl AsRawFd for UnixStream

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.

impl Debug for UnixStream

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromRawFd for UnixStream

unsafe fn from_raw_fd(fd: RawFd) -> UnixStream

Converts a RawFd to a UnixStream.

Notes

The caller is responsible for ensuring that the socket is in non-blocking mode.

impl IntoRawFd for UnixStream

fn into_raw_fd(self) -> RawFd

Consumes this object, returning the raw underlying file descriptor.

impl<'a> Read for &'a UnixStream

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

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

Read the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>where
    R: Read,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it.

impl Read for UnixStream

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

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

Read the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>where
    R: Read,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it.

impl Source for UnixStream

fn register(
    &mut self,
    registry: &Registry,
    token: Token,
    interests: Interest
) -> Result<()>

Register self with the given Registry instance.

fn reregister(
    &mut self,
    registry: &Registry,
    token: Token,
    interests: Interest
) -> Result<()>

Re-register self with the given Registry instance.

fn deregister(&mut self, registry: &Registry) -> Result<()>

Deregister self from the given Registry instance.

impl<'a> Write for &'a UnixStream

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

Write a buffer into this writer, returning how many bytes were written.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn is_write_vectored(&self) -> bool

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adapter for this instance of Write.

impl Write for UnixStream

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

Write a buffer into this writer, returning how many bytes were written.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn is_write_vectored(&self) -> bool

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a “by reference” adapter for this instance of Write.