port_getn can fail wirh errno EINTR when timer expires. But it's valid option.

psumbera · psumbera · commit e67a3da1f92c · 2019-11-20T10:47:10.000+01:00
diff --git a/src/sys/unix/selector/evport.rs b/src/sys/unix/selector/evport.rs
@@ -65,6 +65,14 @@ impl Selector {
             // assigned.
             unsafe { events.set_len(nget as usize) };
         })
+        .or_else(|err| {
+        // The time interval can expire but still it's valid case.
+        if err.raw_os_error() == Some(libc::ETIME) {
+            Ok(())
+        } else {
+            Err(err)
+        }
+          })
     }
 
     pub fn register(&self, fd: RawFd, token: Token, interests: Interests) -> io::Result<()> {
