add O_NONBLOCK for udp/tcp

Signed-off-by: Akhil T Thomas <akhilthomasmec@gmail.com>

src/sys/unix/tcp.rs

@@ -115,6 +115,7 @@ pub(crate) fn accept(listener: &net::TcpListener) -> io::Result<(net::TcpStream,
                 target_os = "espidf",
                 target_os = "vita",
                 target_os = "hermit",
+                target_os = "nto",
             ))]
             syscall!(fcntl(s.as_raw_fd(), libc::F_SETFL, libc::O_NONBLOCK))?;
 

src/sys/unix/uds/listener.rs

@@ -99,6 +99,7 @@ pub(crate) fn accept(listener: &net::UnixListener) -> io::Result<(UnixStream, So
             all(target_arch = "x86", target_os = "android"),
             target_os = "espidf",
             target_os = "vita",
+            target_os = "nto",
         ))]
         syscall!(fcntl(socket, libc::F_SETFL, libc::O_NONBLOCK))?;
 

tests/unix_pipe.rs

@@ -53,7 +53,7 @@ fn smoke() {
 }
 
 #[test]
-#[cfg_attr(target_os = "nto", ignore = "Read close events are detected by NTO")]
+#[cfg_attr(target_os = "nto", ignore = "Writer fd close events do not trigger POLLHUP on nto target")]
 fn event_when_sender_is_dropped() {
     let mut poll = Poll::new().unwrap();
     let mut events = Events::with_capacity(8);
@@ -92,7 +92,7 @@ fn event_when_sender_is_dropped() {
 }
 
 #[test]
-#[cfg_attr(target_os = "nto", ignore = "Read close events are detected by NTO")]
+#[cfg_attr(target_os = "nto", ignore = "Read fd close events do not trigger POLLHUP on nto target")]
 fn event_when_receiver_is_dropped() {
     let mut poll = Poll::new().unwrap();
     let mut events = Events::with_capacity(8);
@@ -126,7 +126,7 @@ fn event_when_receiver_is_dropped() {
 }
 
 #[test]
-#[cfg_attr(target_os = "nto", ignore = "Read close events are detected by NTO")]
+#[cfg_attr(target_os = "nto", ignore = "Read/Write close eventsdo not trigger POLLHUP on nto target")]
 fn from_child_process_io() {
     // `cat` simply echo everything that we write via standard in.
     let mut child = Command::new("cat")