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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// ignore-cloudabi no processes
// ignore-emscripten no processes
#![feature(io, process_capture)]
use std::env;
use std::io::prelude::*;
use std::io;
use std::process::{Command, Stdio};
use std::str;
fn main() {
let args: Vec<String> = env::args().collect();
if args.len() > 1 && args[1] == "child" {
child();
} else {
parent();
}
}
fn parent() {
let args: Vec<String> = env::args().collect();
let mut p = Command::new(&args[0]).arg("child")
.stdout(Stdio::piped())
.stdin(Stdio::piped())
.spawn().unwrap();
p.stdin.as_mut().unwrap().write_all(b"test1\ntest2\ntest3").unwrap();
let out = p.wait_with_output().unwrap();
assert!(out.status.success());
let s = str::from_utf8(&out.stdout).unwrap();
assert_eq!(s, "test1\ntest2\ntest3\n");
}
fn child() {
let mut stdin = io::stdin();
for line in stdin.lock().lines() {
println!("{}", line.unwrap());
}
}
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