Add sys::unix::SocketAddr::as_abstract_namespace()

Fixes tokio-rs#1517.

src/sys/unix/uds/socketaddr.rs

@@ -100,6 +100,18 @@ cfg_os_poll! {
  None
  }
  }
+
+ /// Returns the contents of this address if it is an abstract namespace
+ /// without the leading null byte.
+ // Link to std::os::unix::net::SocketAddr pending
+ // https://github.com/rust-lang/rust/issues/85410.
+ pub fn as_abstract_namespace(&self) -> Option<&[u8]> {
+ if let AddressKind::Abstract(path) = self.address() {
+ Some(path)
+ } else {
+ None
+ }
+ }
  }
 }
 

tests/unix_listener.rs

@@ -133,6 +133,19 @@ fn unix_listener_deregister() {
  handle.join().unwrap();
 }
 
+#[cfg(target_os = "linux")]
+#[test]
+fn unix_listener_abstract_namesapce() {
+ use rand::Rng;
+ let num: u64 = rand::thread_rng().gen();
+ let name = format!("\u{0000}-mio-abstract-uds-{}", num);
+ let listener = UnixListener::bind(&name).unwrap();
+ assert_eq!(
+ listener.local_addr().unwrap().as_abstract_namespace(),
+ Some(&name.as_bytes()[1..]),
+ );
+}
+
 fn smoke_test<F>(new_listener: F, test_name: &'static str)
 where
  F: FnOnce(&Path) -> io::Result<UnixListener>,