Struct std::process::ChildStderr

[+] Show type declaration

pub struct ChildStderr { /* fields omitted */ }

[−] Expand description

A handle to a child process's stderr.

This struct is used in the stderr field on Child.

When an instance of ChildStderr is dropped, the ChildStderr's underlying file handle will be closed.

Trait Implementations

impl Read for ChildStderr

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

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

unsafe fn initializer(&self) -> Initializer

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🔬 This is a nightly-only experimental API. (read_initializer #42788)

Determines if this Reader can work with buffers of uninitialized memory.

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

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

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

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

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

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Read the exact number of bytes required to fill buf.

Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W

fn by_ref(&mut self) -> &mut Self where     Self: Sized,

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Creates a "by reference" adaptor for this instance of Read.

Important traits for Bytes<R>

impl<R: Read> Iterator for Bytes<R> type Item = Result<u8>;

fn bytes(self) -> Bytes<Self> where     Self: Sized,

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

Important traits for Chars<R>

impl<R: Read> Iterator for Chars<R> type Item = Result<char, CharsError>;

fn chars(self) -> Chars<Self> where     Self: Sized,

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🔬 This is a nightly-only experimental API. (io #27802)

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an [Iterator] over [char]s.

Important traits for Chain<T, U>

impl<T: Read, U: Read> Read for Chain<T, U>

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

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Creates an adaptor which will chain this stream with another.

Important traits for Take<T>

impl<T: Read> Read for Take<T>

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

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

impl Debug for ChildStderr

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

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Formats the value using the given formatter.

impl From<ChildStderr> for Stdio

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fn from(child: ChildStderr) -> Stdio

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Performs the conversion.

impl AsRawFd for ChildStderr

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fn as_raw_fd(&self) -> RawFd

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This is supported on Unix only.

Extracts the raw file descriptor.

impl IntoRawFd for ChildStderr

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fn into_raw_fd(self) -> RawFd

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This is supported on Unix only.

Consumes this object, returning the raw underlying file descriptor.

impl AsRawHandle for ChildStderr

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fn as_raw_handle(&self) -> RawHandle

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This is supported on Windows only.

Extracts the raw handle, without taking any ownership.

impl IntoRawHandle for ChildStderr

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fn into_raw_handle(self) -> RawHandle

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This is supported on Windows only.

Consumes this object, returning the raw underlying handle.