src/test/ui/run-pass/issues/issue-13304.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // run-pass
  12 // ignore-cloudabi no processes
  13 // ignore-emscripten no processes
  14
  15 use std::env;
  16 use std::io::prelude::*;
  17 use std::io;
  18 use std::process::{Command, Stdio};
  19 use std::str;
  20
  21 fn main() {
  22     let args: Vec<String> = env::args().collect();
  23     if args.len() > 1 && args[1] == "child" {
  24         child();
  25     } else {
  26         parent();
  27     }
  28 }
  29
  30 fn parent() {
  31     let args: Vec<String> = env::args().collect();
  32     let mut p = Command::new(&args[0]).arg("child")
  33                         .stdout(Stdio::piped())
  34                         .stdin(Stdio::piped())
  35                         .spawn().unwrap();
  36     p.stdin.as_mut().unwrap().write_all(b"test1\ntest2\ntest3").unwrap();
  37     let out = p.wait_with_output().unwrap();
  38     assert!(out.status.success());
  39     let s = str::from_utf8(&out.stdout).unwrap();
  40     assert_eq!(s, "test1\ntest2\ntest3\n");
  41 }
  42
  43 fn child() {
  44     let mut stdin = io::stdin();
  45     for line in stdin.lock().lines() {
  46         println!("{}", line.unwrap());
  47     }
  48 }