3 // ignore-cloudabi no processes
4 // ignore-emscripten no processes
5 // ignore-sgx no processes
7 #![feature(rustc_private)]
11 use std::process::{Command, Stdio};
13 use std::io::{self, Read, Write};
16 unsafe fn without_stdio<R, F: FnOnce() -> R>(f: F) -> R {
26 assert!(libc::close(0) >= 0);
27 assert!(libc::close(1) >= 0);
28 assert!(libc::close(2) >= 0);
32 assert!(libc::dup2(a, 0) >= 0);
33 assert!(libc::dup2(b, 1) >= 0);
34 assert!(libc::dup2(c, 2) >= 0);
40 unsafe fn without_stdio<R, F: FnOnce() -> R>(f: F) -> R {
42 type HANDLE = *mut u8;
45 const STD_INPUT_HANDLE: DWORD = -10i32 as DWORD;
46 const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
47 const STD_ERROR_HANDLE: DWORD = -12i32 as DWORD;
48 const INVALID_HANDLE_VALUE: HANDLE = !0 as HANDLE;
51 fn GetStdHandle(which: DWORD) -> HANDLE;
52 fn SetStdHandle(which: DWORD, handle: HANDLE) -> BOOL;
56 let handle = GetStdHandle(id);
57 assert!(handle != INVALID_HANDLE_VALUE);
58 assert!(SetStdHandle(id, INVALID_HANDLE_VALUE) != 0);
62 let a = doit(STD_INPUT_HANDLE);
63 let b = doit(STD_OUTPUT_HANDLE);
64 let c = doit(STD_ERROR_HANDLE);
68 let doit = |id, handle| {
69 assert!(SetStdHandle(id, handle) != 0);
71 doit(STD_INPUT_HANDLE, a);
72 doit(STD_OUTPUT_HANDLE, b);
73 doit(STD_ERROR_HANDLE, c);
79 if env::args().len() > 1 {
81 assert!(io::stdout().write(b"test\n").is_ok());
82 assert!(io::stderr().write(b"test\n").is_ok());
83 assert_eq!(io::stdin().read(&mut [0; 10]).unwrap(), 0);
87 // First, make sure reads/writes without stdio work if stdio itself is
89 let (a, b, c) = unsafe {
91 let a = io::stdout().write(b"test\n");
92 let b = io::stderr().write(b"test\n");
93 let c = io::stdin().read(&mut [0; 10]);
99 assert_eq!(a.unwrap(), 5);
100 assert_eq!(b.unwrap(), 5);
101 assert_eq!(c.unwrap(), 0);
103 // Second, spawn a child and do some work with "null" descriptors to make
105 let me = env::current_exe().unwrap();
106 let status = Command::new(&me)
108 .stdin(Stdio::null())
109 .stdout(Stdio::null())
110 .stderr(Stdio::null())
112 assert!(status.success(), "{:?} isn't a success", status);
114 // Finally, close everything then spawn a child to make sure everything is
116 let status = unsafe {
117 without_stdio(|| Command::new(&me).arg("next").status())
119 assert!(status.success(), "{:?} isn't a success", status);