pub struct Stdio(_);
Describes what to do with a standard I/O stream for a child process when passed to the stdin, stdout, and stderr methods of Command.
impl Stdio[src]
pub fn piped() -> Stdio[src]
A new pipe should be arranged to connect the parent and child processes.
With stdout:
use std::process::{Command, Stdio};
let output = Command::new("echo")
.arg("Hello, world!")
.stdout(Stdio::piped())
.output()
.expect("Failed to execute command");
assert_eq!(String::from_utf8_lossy(&output.stdout), "Hello, world!\n");
// Nothing echoed to consoleWith stdin:
use std::io::Write;
use std::process::{Command, Stdio};
let mut child = Command::new("rev")
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.spawn()
.expect("Failed to spawn child process");
{
let stdin = child.stdin.as_mut().expect("Failed to open stdin");
stdin.write_all("Hello, world!".as_bytes()).expect("Failed to write to stdin");
}
let output = child.wait_with_output().expect("Failed to read stdout");
assert_eq!(String::from_utf8_lossy(&output.stdout), "!dlrow ,olleH");pub fn inherit() -> Stdio[src]
The child inherits from the corresponding parent descriptor.
With stdout:
use std::process::{Command, Stdio};
let output = Command::new("echo")
.arg("Hello, world!")
.stdout(Stdio::inherit())
.output()
.expect("Failed to execute command");
assert_eq!(String::from_utf8_lossy(&output.stdout), "");
// "Hello, world!" echoed to consoleWith stdin:
use std::process::{Command, Stdio};
use std::io::{self, Write};
let output = Command::new("rev")
.stdin(Stdio::inherit())
.stdout(Stdio::piped())
.output()
.expect("Failed to execute command");
print!("You piped in the reverse of: ");
io::stdout().write_all(&output.stdout).unwrap();pub fn null() -> Stdio[src]
This stream will be ignored. This is the equivalent of attaching the stream to /dev/null
With stdout:
use std::process::{Command, Stdio};
let output = Command::new("echo")
.arg("Hello, world!")
.stdout(Stdio::null())
.output()
.expect("Failed to execute command");
assert_eq!(String::from_utf8_lossy(&output.stdout), "");
// Nothing echoed to consoleWith stdin:
use std::process::{Command, Stdio};
let output = Command::new("rev")
.stdin(Stdio::null())
.stdout(Stdio::piped())
.output()
.expect("Failed to execute command");
assert_eq!(String::from_utf8_lossy(&output.stdout), "");
// Ignores any piped-in inputimpl Debug for Stdio[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
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<ChildStdin> for Stdio[src]1.20.0
fn from(child: ChildStdin) -> Stdio[src]
Converts a ChildStdin into a Stdio
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 consoleimpl From<ChildStdout> for Stdio[src]1.20.0
fn from(child: ChildStdout) -> Stdio[src]
Converts a ChildStdout into a Stdio
ChildStdout will be converted to Stdio using Stdio::from under the hood.
use std::process::{Command, Stdio};
let hello = Command::new("echo")
.arg("Hello, world!")
.stdout(Stdio::piped())
.spawn()
.expect("failed echo command");
let reverse = Command::new("rev")
.stdin(hello.stdout.unwrap()) // Converted into a Stdio here
.output()
.expect("failed reverse command");
assert_eq!(reverse.stdout, b"!dlrow ,olleH\n");impl From<File> for Stdio[src]1.20.0
fn from(file: File) -> Stdio[src]
Converts a File into a Stdio
File will be converted to Stdio using Stdio::from under the hood.
use std::fs::File;
use std::process::Command;
// With the `foo.txt` file containing `Hello, world!"
let file = File::open("foo.txt").unwrap();
let reverse = Command::new("rev")
.stdin(file) // Implicit File conversion into a Stdio
.output()
.expect("failed reverse command");
assert_eq!(reverse.stdout, b"!dlrow ,olleH");impl FromRawFd for Stdio[src]1.2.0
unsafe fn from_raw_fd(fd: RawFd) -> Stdio[src]
impl FromRawHandle for Stdio[src]1.2.0
unsafe fn from_raw_handle(handle: RawHandle) -> Stdio[src]
impl RefUnwindSafe for Stdioimpl Send for Stdioimpl Sync for Stdioimpl Unpin for Stdioimpl UnwindSafe for Stdioimpl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
fn borrow(&self) -> &TⓘNotable 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
[src]
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
fn borrow_mut(&mut self) -> &mut TⓘNotable 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
[src]
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
type Error = InfallibleThe type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [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.Stdio.html