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filedescriptor: probe for pipes between wsl and win32

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This is a port of something I found when developing some changes
in watchman.  When doing something like:

`some win32 command | wsl something`

That pipe doesn't look like a normal win32 pipe and we'd end up
treating it like a socket, but it isn't really a socket either.
This commit is contained in:
Wez Furlong 2020-05-09 09:05:08 -07:00
parent d39c16c406
commit 65cc7bb286
1 changed files with 21 additions and 4 deletions
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25
filedescriptor/src/windows.rs
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@ -19,9 +19,9 @@ use winapi::um::processthreadsapi::*;
use winapi::um::winbase::{FILE_TYPE_CHAR, FILE_TYPE_DISK, FILE_TYPE_PIPE};
use winapi::um::winnt::HANDLE;
use winapi::um::winsock2::{
accept, bind, closesocket, connect, getsockname, htonl, ioctlsocket, listen, recv, send,
WSAPoll, WSASocketW, WSAStartup, INVALID_SOCKET, SOCKET, SOCK_STREAM, WSADATA,
WSA_FLAG_NO_HANDLE_INHERIT,
accept, bind, closesocket, connect, getsockname, getsockopt, htonl, ioctlsocket, listen, recv,
send, WSAGetLastError, WSAPoll, WSASocketW, WSAStartup, INVALID_SOCKET, SOCKET, SOCK_STREAM,
SOL_SOCKET, SO_ERROR, WSADATA, WSAENOTSOCK, WSA_FLAG_NO_HANDLE_INHERIT,
};
pub use winapi::um::winsock2::{POLLERR, POLLHUP, POLLIN, POLLOUT, WSAPOLLFD as pollfd};
@ -113,7 +113,24 @@ impl OwnedHandle {
{
HandleType::Pipe
} else {
HandleType::Socket
// It's probably a socket, but it may be a special device used
// when piping between WSL and native win32 apps.
let mut err = 0;
let mut errsize = std::mem::size_of_val(&err) as _;
if unsafe {
getsockopt(
handle as _,
SOL_SOCKET,
SO_ERROR,
&mut err as *mut _ as *mut i8,
&mut errsize,
) != 0
&& WSAGetLastError() == WSAENOTSOCK
} {
HandleType::Pipe
} else {
HandleType::Socket
}
}
}
_ => HandleType::Unknown,