【Rust】管道

环境

• Rust 1.56.1
• VSCode 1.61.2

概念

参考：https://doc.rust-lang.org/stable/rust-by-example/std_misc/process/pipe.html

示例

main.rs

use std::{
    io::{Read, Write},
    process::{Command, Stdio},
};

static PANGRAM: &str = "the quick brown fox jumped over the lazy dog\n";

fn main() {
    // Spawn the `wc` command
    let process = match Command::new("wc")
        .stdin(Stdio::piped())
        .stdout(Stdio::piped())
        .spawn()
    {
        Err(why) => panic!("couldn't spawn wc: {}", why),
        Ok(process) => process,
    };

    match process.stdin.unwrap().write_all(PANGRAM.as_bytes()) {
        Err(why) => panic!("couldn't write to wc stdin: {}", why),
        Ok(_) => println!("sent pangram to wc"),
    }

    let mut s = String::new();
    match process.stdout.unwrap().read_to_string(&mut s) {
        Err(why) => panic!("couldn't read wc stdout: {}", why),
        Ok(_) => print!("wc responded with:\n{}", s),
    }
}

总结

了解了 Rust 中管道的使用方式。

附录