Struct std::io::Stdin [] [src]

pub struct Stdin {
    // some fields omitted
}

A handle to the standard input stream of a process.

Each handle is a shared reference to a global buffer of input data to this process. A handle can be lock'd to gain full access to BufRead methods (e.g. .lines()). Writes to this handle are otherwise locked with respect to other writes.

This handle implements the Read trait, but beware that concurrent reads of Stdin must be executed with care.

Created by the function io::stdin().

Methods

impl Stdin

fn lock(&self) -> StdinLock

Locks this handle to the standard input stream, returning a readable guard.

The lock is released when the returned lock goes out of scope. The returned guard also implements the Read and BufRead traits for accessing the underlying data.

fn read_line(&self, buf: &mut String) -> Result<usize>

Locks this handle and reads a line of input into the specified buffer.

For detailed semantics of this method, see the documentation on BufRead::read_line.

Examples

fn main() { use std::io; let mut input = String::new(); match io::stdin().read_line(&mut input) { Ok(n) => { println!("{} bytes read", n); println!("{}", input); } Err(error) => println!("error: {}", error), } }
use std::io;

let mut input = String::new();
match io::stdin().read_line(&mut input) {
    Ok(n) => {
        println!("{} bytes read", n);
        println!("{}", input);
    }
    Err(error) => println!("error: {}", error),
}

You can run the example one of two ways:

  • Pipe some text to it, e.g. printf foo | path/to/executable
  • Give it text interactively by running the executable directly, continuing

Trait Implementations

impl Read for Stdin

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

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

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

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

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

fn bytes(self) -> Bytes<Self> where Self: Sized

fn chars(self) -> Chars<Self> where Self: Sized

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

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

fn tee<W: Write>(self, out: W) -> Tee<Self, W> where Self: Sized