std::process

Struct ChildStdin

1.0.0 · source
pub struct ChildStdin { /* private fields */ }
Expand description

A handle to a child process’s standard input (stdin).

This struct is used in the stdin field on Child.

When an instance of ChildStdin is dropped, the ChildStdin’s underlying file handle will be closed. If the child process was blocked on input prior to being dropped, it will become unblocked after dropping.

Trait Implementations§

1.63.0 · source§

impl AsFd for ChildStdin

Available on Unix only.
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fn as_fd(&self) -> BorrowedFd<'_>

Borrows the file descriptor. Read more
1.63.0 · source§

impl AsHandle for ChildStdin

Available on Windows only.
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fn as_handle(&self) -> BorrowedHandle<'_>

Borrows the handle. Read more
1.2.0 · source§

impl AsRawFd for ChildStdin

Available on Unix only.
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fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor. Read more
1.2.0 · source§

impl AsRawHandle for ChildStdin

Available on Windows only.
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fn as_raw_handle(&self) -> RawHandle

Extracts the raw handle. Read more
1.16.0 · source§

impl Debug for ChildStdin

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

Formats the value using the given formatter. Read more
1.63.0 · source§

impl From<ChildStdin> for OwnedFd

Available on Unix only.
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fn from(child_stdin: ChildStdin) -> OwnedFd

Takes ownership of a ChildStdin’s file descriptor.

1.63.0 · source§

impl From<ChildStdin> for OwnedHandle

Available on Windows only.
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fn from(child_stdin: ChildStdin) -> OwnedHandle

Takes ownership of a ChildStdin’s file handle.

1.20.0 · source§

impl From<ChildStdin> for Stdio

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fn from(child: ChildStdin) -> Stdio

Converts a ChildStdin into a Stdio.

§Examples

ChildStdin will be converted to Stdio using Stdio::from under the hood.

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

let reverse = Command::new("rev")
    .stdin(Stdio::piped())
    .spawn()
    .expect("failed reverse command");

let _echo = Command::new("echo")
    .arg("Hello, world!")
    .stdout(reverse.stdin.unwrap()) // Converted into a Stdio here
    .output()
    .expect("failed echo command");

// "!dlrow ,olleH" echoed to console
1.74.0 · source§

impl From<OwnedFd> for ChildStdin

Available on Unix only.

Creates a ChildStdin from the provided OwnedFd.

The provided file descriptor must point to a pipe with the CLOEXEC flag set.

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fn from(fd: OwnedFd) -> ChildStdin

Converts to this type from the input type.
1.74.0 · source§

impl From<OwnedHandle> for ChildStdin

Available on Windows only.

Creates a ChildStdin from the provided OwnedHandle.

The provided handle must be asynchronous, as reading and writing from and to it is implemented using asynchronous APIs.

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fn from(handle: OwnedHandle) -> ChildStdin

Converts to this type from the input type.
1.4.0 · source§

impl IntoRawFd for ChildStdin

Available on Unix only.
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fn into_raw_fd(self) -> RawFd

Consumes this object, returning the raw underlying file descriptor. Read more
1.4.0 · source§

impl IntoRawHandle for ChildStdin

Available on Windows only.
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fn into_raw_handle(self) -> RawHandle

Consumes this object, returning the raw underlying handle. Read more
1.48.0 · source§

impl Write for &ChildStdin

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

Writes a buffer into this writer, returning how many bytes were written. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector #69941)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.0.0 · source§

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

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<()>

🔬This is a nightly-only experimental API. (write_all_vectored #70436)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

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

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

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

Creates a “by reference” adapter for this instance of Write. Read more
1.0.0 · source§

impl Write for ChildStdin

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

Writes a buffer into this writer, returning how many bytes were written. Read more
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fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector #69941)
Determines if this Writer has an efficient write_vectored implementation. Read more
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fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.0.0 · source§

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

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<()>

🔬This is a nightly-only experimental API. (write_all_vectored #70436)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

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

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

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

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.