Struct BorrowedFdWriter

pub struct BorrowedFdWriter<'fd> { /* private fields */ }

A core::fmt::Writer that writes to a file descriptor via direct syscalls.

Its core::fmt::Write implementation retries if interrupted by a signal, and returns errors if the file is closed or the write returns other errors (including EWOULDBLOCK). In such cases, partial writes can occur.

To format a message with Rust’s formatting:

use rustix::fd::AsFd;
use core::fmt::Write;
let (_reader_fd, writer_fd) = rustix::pipe::pipe().unwrap();
let mut writer = BorrowedFdWriter::new(writer_fd.as_fd());
let x = 42;
write!(&mut writer, "{x}").unwrap();

Implementations

impl<'fd> BorrowedFdWriter<'fd>

pub fn new(fd: BorrowedFd<'fd>) -> Self

Trait Implementations

impl Write for BorrowedFdWriter<'_>

fn write_str(&mut self, s: &str) -> Result<(), Error>

Writes a string slice into this writer, returning whether the write succeeded.

fn write_char(&mut self, c: char) -> Result<(), Error>

Writes a char into this writer, returning whether the write succeeded.

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

Glue for usage of the write! macro with implementors of this trait.