mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-30 20:44:34 +00:00
4971e997e5
The switch_stdout_to test was broken on Windows7, as the test infrastructure would refuse to delete the temporary test folder because the switch-stdout-output file we redirected the stdout to was still opened. To fix this issue, we make switch_stdout_to return the previous handle, and add a new switch_stdout_to call at the end of the test to return the stdio handles to their original state. The handle the second switch_stdout_to returns will be automatically closed, which should allow the temporary test folder to be deleted properly.
72 lines
1.8 KiB
Rust
72 lines
1.8 KiB
Rust
#![cfg(any(target_family = "unix", target_family = "windows"))]
|
|
|
|
use std::fs::File;
|
|
use std::io::{Read, Write};
|
|
|
|
mod common;
|
|
|
|
#[cfg(windows)]
|
|
use std::os::windows::io::OwnedHandle;
|
|
|
|
#[cfg(unix)]
|
|
use std::os::fd::OwnedFd;
|
|
|
|
#[cfg(unix)]
|
|
fn switch_stdout_to(file: OwnedFd) -> OwnedFd {
|
|
use std::os::unix::prelude::*;
|
|
|
|
extern "C" {
|
|
fn dup(old: i32) -> i32;
|
|
fn dup2(old: i32, new: i32) -> i32;
|
|
}
|
|
|
|
unsafe {
|
|
let orig_fd = dup(1);
|
|
assert_ne!(orig_fd, -1);
|
|
let res = OwnedFd::from_raw_fd(orig_fd);
|
|
assert_eq!(dup2(file.as_raw_fd(), 1), 1);
|
|
res
|
|
}
|
|
}
|
|
|
|
#[cfg(windows)]
|
|
fn switch_stdout_to(file: OwnedHandle) -> OwnedHandle {
|
|
use std::os::windows::prelude::*;
|
|
|
|
extern "system" {
|
|
fn GetStdHandle(nStdHandle: u32) -> *mut u8;
|
|
fn SetStdHandle(nStdHandle: u32, handle: *mut u8) -> i32;
|
|
}
|
|
|
|
const STD_OUTPUT_HANDLE: u32 = (-11i32) as u32;
|
|
const INVALID_HANDLE_VALUE: *mut u8 = !0 as *mut u8;
|
|
|
|
unsafe {
|
|
let orig_hdl = GetStdHandle(STD_OUTPUT_HANDLE);
|
|
assert!(!orig_hdl.is_null() && orig_hdl != INVALID_HANDLE_VALUE);
|
|
let rc = SetStdHandle(STD_OUTPUT_HANDLE, file.into_raw_handle() as *mut _);
|
|
assert!(rc != 0);
|
|
OwnedHandle::from_raw_handle(orig_hdl as _)
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn switch_stdout() {
|
|
let temp = common::tmpdir();
|
|
let path = temp.join("switch-stdout-output");
|
|
let f = File::create(&path).unwrap();
|
|
|
|
let mut stdout = std::io::stdout();
|
|
stdout.write(b"foo\n").unwrap();
|
|
stdout.flush().unwrap();
|
|
let orig_hdl = switch_stdout_to(f.into());
|
|
stdout.write(b"bar\n").unwrap();
|
|
stdout.flush().unwrap();
|
|
|
|
switch_stdout_to(orig_hdl);
|
|
|
|
let mut contents = String::new();
|
|
File::open(&path).unwrap().read_to_string(&mut contents).unwrap();
|
|
assert_eq!(contents, "bar\n");
|
|
}
|