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Struct std::process::ChildStderr

pub struct ChildStderr { /* fields omitted */ }

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[src]

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

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

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

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

fn read_exact(&mut self, buf: &mut [u8]) -> Result<()>[src]1.6.0

Read the exact number of bytes required to fill buf. Read more

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

ⓘImportant traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized, 
    type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized, 
    type Item = <I as Iterator>::Item;
impl<'_, R: Read + ?Sized> Read for &'_ mut R
impl<'_, W: Write + ?Sized> Write for &'_ mut W

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

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

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

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

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

ⓘImportant traits for Chain<T, U>
impl<T: Read, U: Read> Read for Chain<T, U>

Creates an adaptor which will chain this stream with another. Read more

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

ⓘImportant traits for Take<T>
impl<T: Read> Read for Take<T>

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

impl AsRawFd for ChildStderr[src]1.2.0

impl IntoRawFd for ChildStderr[src]1.4.0

impl AsRawHandle for ChildStderr[src]1.2.0

impl IntoRawHandle for ChildStderr[src]1.4.0

impl Debug for ChildStderr[src]1.16.0

impl From<ChildStderr> for Stdio[src]1.20.0

fn from(child: ChildStderr) -> Stdio[src]

Converts a ChildStderr into a Stdio

Examples

use std::process::{Command, Stdio};

let reverse = Command::new("rev")
    .arg("non_existing_file.txt")
    .stderr(Stdio::piped())
    .spawn()
    .expect("failed reverse command");

let cat = Command::new("cat")
    .arg("-")
    .stdin(reverse.stderr.unwrap()) // Converted into a Stdio here
    .output()
    .expect("failed echo command");

assert_eq!(
    String::from_utf8_lossy(&cat.stdout),
    "rev: cannot open non_existing_file.txt: No such file or directory\n"
);

Auto Trait Implementations

Blanket Implementations

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

impl<T> From<T> for T[src]

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

ⓘImportant traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized, 
    type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized, 
    type Item = <I as Iterator>::Item;
impl<'_, R: Read + ?Sized> Read for &'_ mut R
impl<'_, W: Write + ?Sized> Write for &'_ mut W

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

ⓘImportant traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
    F: Unpin + Future + ?Sized, 
    type Output = <F as Future>::Output;
impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized, 
    type Item = <I as Iterator>::Item;
impl<'_, R: Read + ?Sized> Read for &'_ mut R
impl<'_, W: Write + ?Sized> Write for &'_ mut W

impl<T> Any for T where
    T: 'static + ?Sized, [src]

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/process/struct.ChildStderr.html