Struct std::process::ChildStderr
pub struct ChildStderr { /* private fields */ }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 AsFd for ChildStderrAvailable on Unix only.impl AsHandle for ChildStderrAvailable on Windows only.impl AsRawFd for ChildStderrAvailable on Unix only.impl AsRawHandle for ChildStderrAvailable on Windows only.impl Debug for ChildStderrfn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
impl From<ChildStderr> for OwnedFdAvailable on Unix only.fn from(child_stderr: ChildStderr) -> OwnedFd
Converts to this type from the input type.
impl From<ChildStderr> for OwnedHandleAvailable on Windows only.fn from(child_stderr: ChildStderr) -> OwnedHandle
Converts to this type from the input type.
impl From<ChildStderr> for Stdiofn from(child: ChildStderr) -> StdioConverts 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"
);impl From<OwnedFd> for ChildStderrAvailable on Unix only.Create a ChildStderr from the provided OwnedFd.
The provided file descriptor must point to a pipe with the CLOEXEC flag set.
fn from(fd: OwnedFd) -> ChildStderr ⓘ
Converts to this type from the input type.
impl From<OwnedHandle> for ChildStderrAvailable on Windows only.Create a ChildStderr from the provided OwnedHandle.
The provided handle must be asynchronous, as reading and writing from and to it is implemented using asynchronous APIs.
fn from(handle: OwnedHandle) -> ChildStderr ⓘ
Converts to this type from the input type.
impl IntoRawFd for ChildStderrAvailable on Unix only.fn into_raw_fd(self) -> RawFd
Consumes this object, returning the raw underlying file descriptor. Read more
impl IntoRawHandle for ChildStderrAvailable on Windows only.fn into_raw_handle(self) -> RawHandle
Consumes this object, returning the raw underlying handle. Read more
impl Read for ChildStderrfn 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_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<()>🔬This is a nightly-only experimental API. (
read_buf #78485)
Pull some bytes from this source into the specified buffer. 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🔬This is a nightly-only experimental API. (
can_vector #69941)
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
fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<()>🔬This is a nightly-only experimental API. (
read_buf #78485)
Read the exact number of bytes required to fill
cursor. Read more
fn by_ref(&mut self) -> &mut Self
where
Self: Sized,
Creates a “by reference” adaptor for this instance of
Read. Read more
fn bytes(self) -> Bytes<Self> ⓘ
where
Self: Sized,fn chain<R: Read>(self, next: R) -> Chain<Self, R> ⓘ
where
Self: Sized,
Creates an adapter which will chain this stream with another. Read more
fn take(self, limit: u64) -> Take<Self> ⓘ
where
Self: Sized,
Creates an adapter which will read at most
limit bytes from it. Read more
Auto Trait Implementations
impl RefUnwindSafe for ChildStderrimpl Send for ChildStderrimpl Sync for ChildStderrimpl Unpin for ChildStderrimpl UnwindSafe for ChildStderrBlanket Implementations
impl<T> Any for T
where
T: 'static + ?Sized,impl<T> Borrow<T> for T
where
T: ?Sized,impl<T> BorrowMut<T> for T
where
T: ?Sized,impl<T> From<T> for Tfn from(t: T) -> TReturns the argument unchanged.
impl<T, U> Into<U> for T
where
U: From<T>,fn into(self) -> UCalls U::from(self).
That is, this conversion is whatever the implementation of From<T> for U chooses to do.
impl<T, U> TryFrom<U> for T
where
U: Into<T>,type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
impl<T, U> TryInto<U> for T
where
U: TryFrom<T>,type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
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