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
fn as_raw_handle(&self) -> RawHandle
Extracts the raw handle, without taking any ownership.
impl Debug for ChildStderr
fn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
fn from(child_stderr: ChildStderr) -> OwnedFd
Performs the conversion.
fn from(child_stderr: ChildStderr) -> OwnedHandle
Performs the conversion.
impl From<ChildStderr> for Stdio
fn from(child: ChildStderr) -> Stdio
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"
);fn into_raw_fd(self) -> RawFd
Consumes this object, returning the raw underlying file descriptor. Read more
fn into_raw_handle(self) -> RawHandle
Consumes this object, returning the raw underlying handle. Read more
impl Read for ChildStderr
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. Read more
fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>
Like read, except that it reads into a slice of buffers. Read more
fn is_read_vectored(&self) -> bool
Determines if this Reader has an efficient read_vectored implementation. Read more
unsafe fn initializer(&self) -> Initializer
Determines if this Reader can work with buffers of uninitialized memory. Read more
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>
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>
Read all bytes until EOF in this source, appending them to buf. Read more
fn read_exact(&mut self, buf: &mut [u8]) -> Result<()>
Read the exact number of bytes required to fill buf. Read more
Creates a “by reference” adapter for this instance of Read. Read more
impl<R: Read> Iterator for Bytes<R>
type Item = Result<u8>;
impl<T: Read, U: Read> Read for Chain<T, U>
Creates an adapter which will chain this stream with another. Read more
impl<T: Read> Read for Take<T>
Creates an adapter which will read at most limit bytes from it. Read more
Auto Trait Implementations
impl RefUnwindSafe for ChildStderr
impl Send for ChildStderr
impl Sync for ChildStderr
impl Unpin for ChildStderr
impl UnwindSafe for ChildStderr
Blanket Implementations
impl<T> From<T> for T
pub fn from(t: T) -> T
Performs the conversion.
pub fn into(self) -> U
Performs the conversion.
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.
© 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