src/test/ui/process/issue-14456.rs

   1 // run-pass
   2 #![allow(unused_mut)]
   3 // ignore-emscripten no processes
   4 // ignore-sgx no processes
   5
   6 use std::env;
   7 use std::io::prelude::*;
   8 use std::io;
   9 use std::process::{Command, Stdio};
  10
  11 fn main() {
  12     let args: Vec<String> = env::args().collect();
  13     if args.len() > 1 && args[1] == "child" {
  14         return child()
  15     }
  16
  17     test();
  18 }
  19
  20 fn child() {
  21     writeln!(&mut io::stdout(), "foo").unwrap();
  22     writeln!(&mut io::stderr(), "bar").unwrap();
  23     let mut stdin = io::stdin();
  24     let mut s = String::new();
  25     stdin.lock().read_line(&mut s).unwrap();
  26     assert_eq!(s.len(), 0);
  27 }
  28
  29 fn test() {
  30     let args: Vec<String> = env::args().collect();
  31     let mut p = Command::new(&args[0]).arg("child")
  32                                      .stdin(Stdio::piped())
  33                                      .stdout(Stdio::piped())
  34                                      .stderr(Stdio::piped())
  35                                      .spawn().unwrap();
  36     assert!(p.wait().unwrap().success());
  37 }