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#[cfg(feature = "async")]
#[test]
fn test_fds_async() {
use async_std::io::prelude::BufReadExt as _;
check_open_fds(&[0, 1, 2]);
// run once to ensure all of the fds in the async_std machinery are
// allocated
async_std::task::block_on(async {
let pty = pty_process::Pty::new().unwrap();
pty.resize(pty_process::Size::new(24, 80)).unwrap();
let mut child = pty_process::Command::new("perl")
.arg("-Efor my $fd (0..255) { open my $fh, \"<&=$fd\"; print $fd if stat $fh }; say")
.spawn(&pty)
.unwrap();
let mut buf = vec![];
async_std::io::BufReader::new(&pty)
.read_until(b'\n', &mut buf)
.await
.unwrap();
assert_eq!(&buf, b"012\r\n");
let status = child.status().await.unwrap();
assert_eq!(status.code().unwrap(), 0);
});
async_std::task::block_on(async {
let fds = get_open_fds();
let pty = pty_process::Pty::new().unwrap();
pty.resize(pty_process::Size::new(24, 80)).unwrap();
let mut child = pty_process::Command::new("perl")
.arg("-Efor my $fd (0..255) { open my $fh, \"<&=$fd\"; print $fd if stat $fh }; say")
.spawn(&pty)
.unwrap();
let mut buf = vec![];
async_std::io::BufReader::new(&pty)
.read_until(b'\n', &mut buf)
.await
.unwrap();
assert_eq!(&buf, b"012\r\n");
let status = child.status().await.unwrap();
assert_eq!(status.code().unwrap(), 0);
drop(pty);
check_open_fds(&fds);
});
async_std::task::block_on(async {
let fds = get_open_fds();
let pty = pty_process::Pty::new().unwrap();
pty.resize(pty_process::Size::new(24, 80)).unwrap();
let mut child = pty_process::Command::new("perl")
.arg("-Efor my $fd (0..255) { open my $fh, \"<&=$fd\"; print $fd if stat $fh }; say")
.stderr(Some(std::process::Stdio::null()))
.spawn(&pty)
.unwrap();
let mut buf = vec![];
async_std::io::BufReader::new(&pty)
.read_until(b'\n', &mut buf)
.await
.unwrap();
assert_eq!(&buf, b"012\r\n");
let status = child.status().await.unwrap();
assert_eq!(status.code().unwrap(), 0);
drop(pty);
check_open_fds(&fds);
});
}
#[cfg(feature = "async")]
#[track_caller]
fn check_open_fds(expected: &[i32]) {
assert_eq!(get_open_fds(), expected);
}
#[cfg(feature = "async")]
fn get_open_fds() -> Vec<i32> {
(0..=255)
.filter(|fd| nix::sys::stat::fstat(*fd).is_ok())
.collect()
}
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