handle EINTR return code from tcdrain to effectively block until flus…

…h is complete
serialport · Oct 23, 2024 · 0fdfc2e · 0fdfc2e
1 parent f854b8d
commit 0fdfc2e
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/src/posix/tty.rs b/src/posix/tty.rs
@@ -441,8 +441,13 @@ impl io::Write for TTYPort {
     }
 
     fn flush(&mut self) -> io::Result<()> {
-        nix::sys::termios::tcdrain(self.fd)
-            .map_err(|_| io::Error::new(io::ErrorKind::Other, "flush failed"))
+        loop {
+            return match nix::sys::termios::tcdrain(self.fd) {
+                Ok(_) => Ok(()),
+                Err(nix::errno::Errno::EINTR) => continue,
+                Err(_) => Err(io::Error::new(io::ErrorKind::Other, "flush failed")),
+            };
+        }
     }
 }