Merge #1563

1563: Impl `AsRawFd` for `OwningIter` r=rtzoeller a=deantvv

For issue #1558

Co-authored-by: Dean Li <deantvv@gmail.com>

CHANGELOG.md

@@ -41,6 +41,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
   (#[1640](https://github.com/nix-rust/nix/pull/1640))
 - Added `accept4` on DragonFly, Emscripten, Fuchsia, Illumos, and NetBSD.
   (#[1654](https://github.com/nix-rust/nix/pull/1654))
+- Added `AsRawFd` implementation on `OwningIter`.
+  (#[1563](https://github.com/nix-rust/nix/pull/1563))
 
 ### Changed
 

src/dir.rs

@@ -142,6 +142,14 @@ impl Iterator for OwningIter {
     }
 }
 
+/// The file descriptor continues to be owned by the `OwningIter`,
+/// so callers must not keep a `RawFd` after the `OwningIter` is dropped.
+impl AsRawFd for OwningIter {
+    fn as_raw_fd(&self) -> RawFd {
+        self.0.as_raw_fd()
+    }
+}
+
 impl IntoIterator for Dir {
     type Item = Result<Entry>;
     type IntoIter = OwningIter;