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// Copyright 2016 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-windows - this is a unix-specific test
// ignore-cloudabi no processes
// ignore-emscripten no processes
#![feature(process_exec, libc)]
extern crate libc;
use std::env;
use std::io::Error;
use std::os::unix::process::CommandExt;
use std::process::Command;
use std::sync::Arc;
use std::sync::atomic::{AtomicUsize, Ordering};
fn main() {
if let Some(arg) = env::args().skip(1).next() {
match &arg[..] {
"test1" => println!("hello2"),
"test2" => assert_eq!(env::var("FOO").unwrap(), "BAR"),
"test3" => assert_eq!(env::current_dir().unwrap()
.to_str().unwrap(), "/"),
"empty" => {}
_ => panic!("unknown argument: {}", arg),
}
return
}
let me = env::current_exe().unwrap();
let output = Command::new(&me).arg("test1").before_exec(|| {
println!("hello");
Ok(())
}).output().unwrap();
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert_eq!(output.stdout, b"hello\nhello2\n");
let output = Command::new(&me).arg("test2").before_exec(|| {
env::set_var("FOO", "BAR");
Ok(())
}).output().unwrap();
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
let output = Command::new(&me).arg("test3").before_exec(|| {
env::set_current_dir("/").unwrap();
Ok(())
}).output().unwrap();
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
let output = Command::new(&me).arg("bad").before_exec(|| {
Err(Error::from_raw_os_error(102))
}).output().unwrap_err();
assert_eq!(output.raw_os_error(), Some(102));
let pid = unsafe { libc::getpid() };
assert!(pid >= 0);
let output = Command::new(&me).arg("empty").before_exec(move || {
let child = unsafe { libc::getpid() };
assert!(child >= 0);
assert!(pid != child);
Ok(())
}).output().unwrap();
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
let mem = Arc::new(AtomicUsize::new(0));
let mem2 = mem.clone();
let output = Command::new(&me).arg("empty").before_exec(move || {
assert_eq!(mem2.fetch_add(1, Ordering::SeqCst), 0);
Ok(())
}).output().unwrap();
assert!(output.status.success());
assert!(output.stderr.is_empty());
assert!(output.stdout.is_empty());
assert_eq!(mem.load(Ordering::SeqCst), 0);
}
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