fix error code to be POSIX compatible

src/fd/mod.rs

@@ -205,13 +205,13 @@ pub(crate) trait ObjectInterface: Sync + Send + core::fmt::Debug {
 	/// `setsockopt` sets options on sockets
 	#[cfg(any(feature = "tcp", feature = "udp", feature = "vsock"))]
 	async fn setsockopt(&self, _opt: SocketOption, _optval: bool) -> io::Result<()> {
-		Err(io::Error::EINVAL)
+		Err(io::Error::ENOTSOCK)
 	}
 
 	/// `getsockopt` gets options on sockets
 	#[cfg(any(feature = "tcp", feature = "udp", feature = "vsock"))]
 	async fn getsockopt(&self, _opt: SocketOption) -> io::Result<bool> {
-		Err(io::Error::EINVAL)
+		Err(io::Error::ENOTSOCK)
 	}
 
 	/// `getsockname` gets socket name

src/io.rs

@@ -22,6 +22,7 @@ pub enum Error {
 	EEXIST = crate::errno::EEXIST as isize,
 	EADDRINUSE = crate::errno::EADDRINUSE as isize,
 	EOVERFLOW = crate::errno::EOVERFLOW as isize,
+	ENOTSOCK = crate::errno::ENOTSOCK as isize,
 }
 
 pub type Result<T> = result::Result<T, Error>;

src/scheduler/mod.rs

@@ -468,7 +468,7 @@ impl PerCoreScheduler {
 				let mut pinned_obj = core::pin::pin!(borrowed.object_map.read());
 
 				let guard = ready!(pinned_obj.as_mut().poll(cx));
-				Ready(guard.get(&fd).cloned().ok_or(io::Error::EINVAL))
+				Ready(guard.get(&fd).cloned().ok_or(io::Error::EBADF))
 			})
 		})
 		.await
@@ -579,7 +579,7 @@ impl PerCoreScheduler {
 				let borrowed = self.current_task.borrow();
 				let mut pinned_obj = core::pin::pin!(borrowed.object_map.write());
 				let mut guard = ready!(pinned_obj.as_mut().poll(cx));
-				Ready(guard.remove(&fd).ok_or(io::Error::EINVAL))
+				Ready(guard.remove(&fd).ok_or(io::Error::EBADF))
 			})
 		})
 		.await