1 files changed, 63 insertions, 0 deletions
diff --git a/library/std/src/os/net/linux_ext/socket.rs b/library/std/src/os/net/linux_ext/socket.rs
new file mode 100644
index 00000000000..4e4168f693c
--- /dev/null
+++ b/library/std/src/os/net/linux_ext/socket.rs
@@ -0,0 +1,63 @@
+//! Linux and Android-specific socket functionality.
+
+use crate::io;
+use crate::os::unix::net;
+use crate::sealed::Sealed;
+use crate::sys_common::AsInner;
+
+/// Linux-specific functionality for `AF_UNIX` sockets [`UnixDatagram`]
+/// and [`UnixStream`].
+///
+/// [`UnixDatagram`]: net::UnixDatagram
+/// [`UnixStream`]: net::UnixStream
+#[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
+pub trait UnixSocketExt: Sealed {
+    /// Query the current setting of socket option `SO_PASSCRED`.
+    #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
+    fn passcred(&self) -> io::Result<bool>;
+
+    /// Enable or disable socket option `SO_PASSCRED`.
+    ///
+    /// This option enables the credentials of the sending process to be
+    /// received as a control message in [`AncillaryData`].
+    ///
+    /// [`AncillaryData`]: net::AncillaryData
+    ///
+    /// # Examples
+    ///
+    /// ```no_run
+    /// #![feature(unix_socket_ancillary_data)]
+    /// use std::os::linux::net::UnixSocketExt;
+    /// use std::os::unix::net::UnixDatagram;
+    ///
+    /// fn main() -> std::io::Result<()> {
+    ///     let sock = UnixDatagram::unbound()?;
+    ///     sock.set_passcred(true).expect("set_passcred failed");
+    ///     Ok(())
+    /// }
+    /// ```
+    #[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
+    fn set_passcred(&self, passcred: bool) -> io::Result<()>;
+}
+
+#[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
+impl UnixSocketExt for net::UnixDatagram {
+    fn passcred(&self) -> io::Result<bool> {
+        self.as_inner().passcred()
+    }
+
+    fn set_passcred(&self, passcred: bool) -> io::Result<()> {
+        self.as_inner().set_passcred(passcred)
+    }
+}
+
+#[unstable(feature = "unix_socket_ancillary_data", issue = "76915")]
+impl UnixSocketExt for net::UnixStream {
+    fn passcred(&self) -> io::Result<bool> {
+        self.as_inner().passcred()
+    }
+
+    fn set_passcred(&self, passcred: bool) -> io::Result<()> {
+        self.as_inner().set_passcred(passcred)
+    }
+}