stdio-override

A Rust library to easily override Stdio file descriptors in Rust

• Documentation

Usage

Add this to your Cargo.toml:

[dependencies]
stdio-override = "0.1"

and for Rust Edition 2015 add this to your crate root:

extern crate stdio_override;

In Rust Edition 2018 you can simply do:

use stdio_override::*;

Here's an example on how to write stdout into a file:

    use std::{fs::read_to_string, mem};
    use stdio_override::StdoutOverride;
    
    fn main() {
        let file_name = "./test.txt";
    
        let guard = StdoutOverride::override_file(file_name).unwrap();
        println!("12345");
        mem::drop(guard);
    
        let contents = read_to_string(file_name).unwrap();
        assert_eq!("12345\n", contents);
        println!("Outside!");
    }

You can do the same with sockets:

    use std::{
        io::Read,
        mem,
        net::{TcpListener, TcpStream},
    };
    use stdio_override::StdoutOverride;
    
    fn main() {
        let address = ("127.0.0.1", 5543);
    
        let listener = TcpListener::bind(address).unwrap();
        let socket = TcpStream::connect(address).unwrap();
    
        let guard = StdoutOverride::override_raw(socket).unwrap();
        println!("12345");
        mem::drop(guard);
    
        let mut contents = String::new();
        let (mut stream, _) = listener.accept().unwrap();
        stream.read_to_string(&mut contents).unwrap();
    
        assert_eq!("12345\n", contents);
    
        println!("Outside!");
    }