Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 1076 insertions, 0 deletions

diff --git a/third_party/rust/mio-uds/.cargo-checksum.json b/third_party/rust/mio-uds/.cargo-checksum.json
new file mode 100644
index 0000000000..1c83b1b67c
--- /dev/null
+++ b/third_party/rust/mio-uds/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"6fb189dd6765ec3be1e2cb65d8733979c48f24df77e0b6fece565fbbc27ae022","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"378f5840b258e2779c39418f3f2d7b2ba96f1c7917dd6be0713f88305dbda397","README.md":"8de91b1fa2bd5014b42e2b33d8b07e1626ed9715cfd8b8bfd80aa95a114d737c","src/datagram.rs":"b4311804bd4e330905fbf3e47e8c738759bbc039bf6ad2045490080a958d48c2","src/lib.rs":"a827f7a59ddd3c6bc6bd119646493f1c921de48b3ac5d674d5810dff35231dd8","src/listener.rs":"297d73cac8fce225972abb9c8747349d6151e5a61cb8f7fbfb050c336375a61d","src/socket.rs":"f278f62d1f751cae4a0dbfaf507012a99f34eb45b58aee6d70fa1a69e13132c6","src/stream.rs":"31bb65120f6b236a35cfc989c63e06c5e1d4ee9ea1995b150a9a455435f5b1e3"},"package":"afcb699eb26d4332647cc848492bbc15eafb26f08d0304550d5aa1f612e066f0"}
\ No newline at end of file
diff --git a/third_party/rust/mio-uds/Cargo.toml b/third_party/rust/mio-uds/Cargo.toml
new file mode 100644
index 0000000000..b6501f7abf
--- /dev/null
+++ b/third_party/rust/mio-uds/Cargo.toml
@@ -0,0 +1,34 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+name = "mio-uds"
+version = "0.6.8"
+authors = ["Alex Crichton <alex@alexcrichton.com>"]
+include = ["Cargo.toml", "LICENSE-APACHE", "LICENSE-MIT", "README.md", "src/**/*.rs"]
+description = "Unix domain socket bindings for mio\n"
+homepage = "https://github.com/deprecrated/mio-uds"
+documentation = "https://docs.rs/mio-uds"
+readme = "README.md"
+categories = ["asynchronous"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/deprecrated/mio-uds"
+[dev-dependencies.tempdir]
+version = "0.3"
+[target."cfg(unix)".dependencies.iovec]
+version = "0.1"
+
+[target."cfg(unix)".dependencies.libc]
+version = "0.2.69"
+
+[target."cfg(unix)".dependencies.mio]
+version = "0.6.5"
diff --git a/third_party/rust/mio-uds/LICENSE-APACHE b/third_party/rust/mio-uds/LICENSE-APACHE
new file mode 100644
index 0000000000..16fe87b06e
--- /dev/null
+++ b/third_party/rust/mio-uds/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
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+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
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diff --git a/third_party/rust/mio-uds/LICENSE-MIT b/third_party/rust/mio-uds/LICENSE-MIT
new file mode 100644
index 0000000000..39e0ed6602
--- /dev/null
+++ b/third_party/rust/mio-uds/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2014 Alex Crichton
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/third_party/rust/mio-uds/README.md b/third_party/rust/mio-uds/README.md
new file mode 100644
index 0000000000..ebbaa706bf
--- /dev/null
+++ b/third_party/rust/mio-uds/README.md
@@ -0,0 +1,49 @@
+# mio-uds
+
+A library for integrating Unix Domain Sockets with [mio]. Based on the standard
+library's [support for Unix sockets][std], except all of the abstractions and
+types are nonblocking to conform with the expectations of mio.
+
+[mio]: https://github.com/tokio-rs/mio
+[std]: https://doc.rust-lang.org/std/os/unix/net/
+
+[![Build Status](https://github.com/deprecrated/mio-uds/workflows/CI/badge.svg)](https://github.com/deprecrated/mio-uds/actions?query=workflow%3ACI+branch%3Amaster)
+[![Documentation](https://docs.rs/mio-uds/badge.svg?version=0.6)](https://docs.rs/mio-uds/~0.6)
+
+# mio-uds is Deprecated
+
+With the 0.7 release, `mio` now includes native support for Unix Domain
+Sockets.  Consumers should switch to that functionality when updating their
+`mio` dependency to the 0.7.x series.
+
+
+## Usage
+
+```toml
+# Cargo.toml
+[dependencies]
+mio-uds = "0.6"
+mio = "0.6"
+```
+
+The three exported types at the top level, `UnixStream`, `UnixListener`, and
+`UnixDatagram`, are thin wrappers around the libstd counterparts. They can be
+used in similar fashions to mio's TCP and UDP types in terms of registration and
+API.
+
+# License
+
+This project is licensed under either of
+
+ * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
+   http://www.apache.org/licenses/LICENSE-2.0)
+ * MIT license ([LICENSE-MIT](LICENSE-MIT) or
+   http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall
+be dual licensed as above, without any additional terms or conditions.
diff --git a/third_party/rust/mio-uds/src/datagram.rs b/third_party/rust/mio-uds/src/datagram.rs
new file mode 100644
index 0000000000..4fbefd1ceb
--- /dev/null
+++ b/third_party/rust/mio-uds/src/datagram.rs
@@ -0,0 +1,183 @@
+use std::io;
+use std::net::Shutdown;
+use std::os::unix::net;
+use std::os::unix::prelude::*;
+use std::path::Path;
+
+use libc;
+use mio::event::Evented;
+use mio::unix::EventedFd;
+use mio::{Poll, Token, Ready, PollOpt};
+
+use cvt;
+use socket::{sockaddr_un, Socket};
+
+/// A Unix datagram socket.
+#[derive(Debug)]
+pub struct UnixDatagram {
+    inner: net::UnixDatagram,
+}
+
+impl UnixDatagram {
+    /// Creates a Unix datagram socket bound to the given path.
+    pub fn bind<P: AsRef<Path>>(path: P) -> io::Result<UnixDatagram> {
+        UnixDatagram::_bind(path.as_ref())
+    }
+
+    fn _bind(path: &Path) -> io::Result<UnixDatagram> {
+        unsafe {
+            let (addr, len) = try!(sockaddr_un(path));
+            let fd = try!(Socket::new(libc::SOCK_DGRAM));
+
+            let addr = &addr as *const _ as *const _;
+            try!(cvt(libc::bind(fd.fd(), addr, len)));
+
+            Ok(UnixDatagram::from_raw_fd(fd.into_fd()))
+        }
+    }
+
+    /// Consumes a standard library `UnixDatagram` and returns a wrapped
+    /// `UnixDatagram` compatible with mio.
+    ///
+    /// The returned stream is moved into nonblocking mode and is otherwise
+    /// ready to get associated with an event loop.
+    pub fn from_datagram(stream: net::UnixDatagram) -> io::Result<UnixDatagram> {
+        try!(stream.set_nonblocking(true));
+        Ok(UnixDatagram { inner: stream })
+    }
+
+    /// Create an unnamed pair of connected sockets.
+    ///
+    /// Returns two `UnixDatagrams`s which are connected to each other.
+    pub fn pair() -> io::Result<(UnixDatagram, UnixDatagram)> {
+        unsafe {
+            let (a, b) = try!(Socket::pair(libc::SOCK_DGRAM));
+            Ok((UnixDatagram::from_raw_fd(a.into_fd()),
+                UnixDatagram::from_raw_fd(b.into_fd())))
+        }
+    }
+
+    /// Creates a Unix Datagram socket which is not bound to any address.
+    pub fn unbound() -> io::Result<UnixDatagram> {
+        let stream = try!(net::UnixDatagram::unbound());
+        try!(stream.set_nonblocking(true));
+        Ok(UnixDatagram { inner: stream })
+    }
+
+    /// Connects the socket to the specified address.
+    ///
+    /// The `send` method may be used to send data to the specified address.
+    /// `recv` and `recv_from` will only receive data from that address.
+    pub fn connect<P: AsRef<Path>>(&self, path: P) -> io::Result<()> {
+        self.inner.connect(path)
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `UnixListener` is a reference to the same socket that this
+    /// object references. Both handles can be used to accept incoming
+    /// connections and options set on one listener will affect the other.
+    pub fn try_clone(&self) -> io::Result<UnixDatagram> {
+        self.inner.try_clone().map(|i| {
+            UnixDatagram { inner: i }
+        })
+    }
+
+    /// Returns the address of this socket.
+    pub fn local_addr(&self) -> io::Result<net::SocketAddr> {
+        self.inner.local_addr()
+    }
+
+    /// Returns the address of this socket's peer.
+    ///
+    /// The `connect` method will connect the socket to a peer.
+    pub fn peer_addr(&self) -> io::Result<net::SocketAddr> {
+        self.inner.peer_addr()
+    }
+
+    /// Receives data from the socket.
+    ///
+    /// On success, returns the number of bytes read and the address from
+    /// whence the data came.
+    pub fn recv_from(&self, buf: &mut [u8]) -> io::Result<(usize, net::SocketAddr)> {
+        self.inner.recv_from(buf)
+    }
+
+    /// Receives data from the socket.
+    ///
+    /// On success, returns the number of bytes read.
+    pub fn recv(&self, buf: &mut [u8]) -> io::Result<usize> {
+        self.inner.recv(buf)
+    }
+
+    /// Sends data on the socket to the specified address.
+    ///
+    /// On success, returns the number of bytes written.
+    pub fn send_to<P: AsRef<Path>>(&self, buf: &[u8], path: P) -> io::Result<usize> {
+        self.inner.send_to(buf, path)
+    }
+
+    /// Sends data on the socket to the socket's peer.
+    ///
+    /// The peer address may be set by the `connect` method, and this method
+    /// will return an error if the socket has not already been connected.
+    ///
+    /// On success, returns the number of bytes written.
+    pub fn send(&self, buf: &[u8]) -> io::Result<usize> {
+        self.inner.send(buf)
+    }
+
+    /// Returns the value of the `SO_ERROR` option.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.inner.take_error()
+    }
+
+    /// Shut down the read, write, or both halves of this connection.
+    ///
+    /// This function will cause all pending and future I/O calls on the
+    /// specified portions to immediately return with an appropriate value
+    /// (see the documentation of `Shutdown`).
+    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+        self.inner.shutdown(how)
+    }
+}
+
+impl Evented for UnixDatagram {
+    fn register(&self,
+                poll: &Poll,
+                token: Token,
+                events: Ready,
+                opts: PollOpt) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).register(poll, token, events, opts)
+    }
+
+    fn reregister(&self,
+                  poll: &Poll,
+                  token: Token,
+                  events: Ready,
+                  opts: PollOpt) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).reregister(poll, token, events, opts)
+    }
+
+    fn deregister(&self, poll: &Poll) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).deregister(poll)
+    }
+}
+
+impl AsRawFd for UnixDatagram {
+    fn as_raw_fd(&self) -> i32 {
+        self.inner.as_raw_fd()
+    }
+}
+
+impl IntoRawFd for UnixDatagram {
+    fn into_raw_fd(self) -> i32 {
+        self.inner.into_raw_fd()
+    }
+}
+
+impl FromRawFd for UnixDatagram {
+    unsafe fn from_raw_fd(fd: i32) -> UnixDatagram {
+        UnixDatagram { inner: net::UnixDatagram::from_raw_fd(fd) }
+    }
+}
diff --git a/third_party/rust/mio-uds/src/lib.rs b/third_party/rust/mio-uds/src/lib.rs
new file mode 100644
index 0000000000..ed29e4ac92
--- /dev/null
+++ b/third_party/rust/mio-uds/src/lib.rs
@@ -0,0 +1,28 @@
+//! MIO bindings for Unix Domain Sockets
+
+#![cfg(unix)]
+#![deny(missing_docs)]
+#![doc(html_root_url = "https://docs.rs/mio-uds/0.6")]
+
+extern crate iovec;
+extern crate libc;
+extern crate mio;
+
+use std::io;
+
+mod datagram;
+mod listener;
+mod socket;
+mod stream;
+
+pub use stream::UnixStream;
+pub use listener::UnixListener;
+pub use datagram::UnixDatagram;
+
+fn cvt(i: libc::c_int) -> io::Result<libc::c_int> {
+    if i == -1 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(i)
+    }
+}
diff --git a/third_party/rust/mio-uds/src/listener.rs b/third_party/rust/mio-uds/src/listener.rs
new file mode 100644
index 0000000000..c79830eeb0
--- /dev/null
+++ b/third_party/rust/mio-uds/src/listener.rs
@@ -0,0 +1,143 @@
+use std::io;
+use std::os::unix::net;
+use std::os::unix::prelude::*;
+use std::path::Path;
+
+use libc;
+use mio::event::Evented;
+use mio::unix::EventedFd;
+use mio::{Poll, PollOpt, Ready, Token};
+
+use UnixStream;
+use cvt;
+use socket::{sockaddr_un, Socket};
+
+/// A structure representing a Unix domain socket server.
+///
+/// This listener can be used to accept new streams connected to a remote
+/// endpoint, through which the `read` and `write` methods can be used to
+/// communicate.
+#[derive(Debug)]
+pub struct UnixListener {
+    inner: net::UnixListener,
+}
+
+impl UnixListener {
+    /// Creates a new `UnixListener` bound to the specified socket.
+    pub fn bind<P: AsRef<Path>>(path: P) -> io::Result<UnixListener> {
+        UnixListener::_bind(path.as_ref())
+    }
+
+    fn _bind(path: &Path) -> io::Result<UnixListener> {
+        unsafe {
+            let (addr, len) = try!(sockaddr_un(path));
+            let fd = try!(Socket::new(libc::SOCK_STREAM));
+
+            let addr = &addr as *const _ as *const _;
+            try!(cvt(libc::bind(fd.fd(), addr, len)));
+            try!(cvt(libc::listen(fd.fd(), 128)));
+
+            Ok(UnixListener::from_raw_fd(fd.into_fd()))
+        }
+    }
+
+    /// Consumes a standard library `UnixListener` and returns a wrapped
+    /// `UnixListener` compatible with mio.
+    ///
+    /// The returned stream is moved into nonblocking mode and is otherwise
+    /// ready to get associated with an event loop.
+    pub fn from_listener(stream: net::UnixListener) -> io::Result<UnixListener> {
+        try!(stream.set_nonblocking(true));
+        Ok(UnixListener { inner: stream })
+    }
+
+    /// Accepts a new incoming connection to this listener.
+    ///
+    /// When established, the corresponding `UnixStream` and the remote peer's
+    /// address will be returned as `Ok(Some(...))`. If there is no connection
+    /// waiting to be accepted, then `Ok(None)` is returned.
+    ///
+    /// If an error happens while accepting, `Err` is returned.
+    pub fn accept(&self) -> io::Result<Option<(UnixStream, net::SocketAddr)>> {
+        match try!(self.accept_std()) {
+            Some((stream, addr)) => Ok(Some((UnixStream::from_stream(stream)?, addr))),
+            None => Ok(None),
+        }
+    }
+
+    /// Accepts a new incoming connection to this listener.
+    ///
+    /// This method is the same as `accept`, except that it returns a `net::UnixStream` *in blocking mode*
+    /// which isn't bound to a `mio` type. This can later be converted to a `mio` type, if
+    /// necessary.
+    ///
+    /// If an error happens while accepting, `Err` is returned.
+    pub fn accept_std(&self) -> io::Result<Option<(net::UnixStream, net::SocketAddr)>> {
+        match self.inner.accept() {
+            Ok((socket, addr)) => Ok(Some(unsafe {
+                (net::UnixStream::from_raw_fd(socket.into_raw_fd()), addr)
+            })),
+            Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => Ok(None),
+            Err(e) => Err(e),
+        }
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `UnixListener` is a reference to the same socket that this
+    /// object references. Both handles can be used to accept incoming
+    /// connections and options set on one listener will affect the other.
+    pub fn try_clone(&self) -> io::Result<UnixListener> {
+        self.inner.try_clone().map(|l| UnixListener { inner: l })
+    }
+
+    /// Returns the local socket address of this listener.
+    pub fn local_addr(&self) -> io::Result<net::SocketAddr> {
+        self.inner.local_addr()
+    }
+
+    /// Returns the value of the `SO_ERROR` option.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.inner.take_error()
+    }
+}
+
+impl Evented for UnixListener {
+    fn register(&self, poll: &Poll, token: Token, events: Ready, opts: PollOpt) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).register(poll, token, events, opts)
+    }
+
+    fn reregister(
+        &self,
+        poll: &Poll,
+        token: Token,
+        events: Ready,
+        opts: PollOpt,
+    ) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).reregister(poll, token, events, opts)
+    }
+
+    fn deregister(&self, poll: &Poll) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).deregister(poll)
+    }
+}
+
+impl AsRawFd for UnixListener {
+    fn as_raw_fd(&self) -> i32 {
+        self.inner.as_raw_fd()
+    }
+}
+
+impl IntoRawFd for UnixListener {
+    fn into_raw_fd(self) -> i32 {
+        self.inner.into_raw_fd()
+    }
+}
+
+impl FromRawFd for UnixListener {
+    unsafe fn from_raw_fd(fd: i32) -> UnixListener {
+        UnixListener {
+            inner: net::UnixListener::from_raw_fd(fd),
+        }
+    }
+}
diff --git a/third_party/rust/mio-uds/src/socket.rs b/third_party/rust/mio-uds/src/socket.rs
new file mode 100644
index 0000000000..820f74dde7
--- /dev/null
+++ b/third_party/rust/mio-uds/src/socket.rs
@@ -0,0 +1,166 @@
+use std::cmp::Ordering;
+use std::io;
+use std::mem;
+use std::os::unix::prelude::*;
+use std::path::Path;
+
+use libc::{self, c_int, c_ulong};
+
+use cvt;
+
+// See below for the usage of SOCK_CLOEXEC, but this constant is only defined on
+// Linux currently (e.g. support doesn't exist on other platforms). In order to
+// get name resolution to work and things to compile we just define a dummy
+// SOCK_CLOEXEC here for other platforms. Note that the dummy constant isn't
+// actually ever used (the blocks below are wrapped in `if cfg!` as well.
+#[cfg(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "illumos",
+    target_os = "solaris"
+))]
+use libc::{SOCK_CLOEXEC, SOCK_NONBLOCK};
+#[cfg(not(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "illumos",
+    target_os = "solaris"
+)))]
+const SOCK_CLOEXEC: c_int = 0;
+#[cfg(not(any(
+    target_os = "linux",
+    target_os = "android",
+    target_os = "illumos",
+    target_os = "solaris"
+)))]
+const SOCK_NONBLOCK: c_int = 0;
+
+pub struct Socket {
+    fd: c_int,
+}
+
+impl Socket {
+    pub fn new(ty: c_int) -> io::Result<Socket> {
+        unsafe {
+            // On linux we first attempt to pass the SOCK_CLOEXEC flag to
+            // atomically create the socket and set it as CLOEXEC. Support for
+            // this option, however, was added in 2.6.27, and we still support
+            // 2.6.18 as a kernel, so if the returned error is EINVAL we
+            // fallthrough to the fallback.
+            if cfg!(any(
+                target_os = "linux",
+                target_os = "android",
+                target_os = "illumos",
+                target_os = "solaris"
+            )) {
+                let flags = ty | SOCK_CLOEXEC | SOCK_NONBLOCK;
+                match cvt(libc::socket(libc::AF_UNIX, flags, 0)) {
+                    Ok(fd) => return Ok(Socket { fd: fd }),
+                    Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {}
+                    Err(e) => return Err(e),
+                }
+            }
+
+            let fd = Socket { fd: try!(cvt(libc::socket(libc::AF_UNIX, ty, 0))) };
+            try!(cvt(libc::ioctl(fd.fd, libc::FIOCLEX)));
+            let mut nonblocking = 1 as c_ulong;
+            try!(cvt(libc::ioctl(fd.fd, libc::FIONBIO, &mut nonblocking)));
+            Ok(fd)
+        }
+    }
+
+    pub fn pair(ty: c_int) -> io::Result<(Socket, Socket)> {
+        unsafe {
+            let mut fds = [0, 0];
+
+            // Like above, see if we can set cloexec atomically
+            if cfg!(any(
+                target_os = "linux",
+                target_os = "android",
+                target_os = "illumos",
+                target_os = "solaris"
+            )) {
+                let flags = ty | SOCK_CLOEXEC | SOCK_NONBLOCK;
+                match cvt(libc::socketpair(libc::AF_UNIX, flags, 0, fds.as_mut_ptr())) {
+                    Ok(_) => {
+                        return Ok((Socket { fd: fds[0] }, Socket { fd: fds[1] }))
+                    }
+                    Err(ref e) if e.raw_os_error() == Some(libc::EINVAL) => {},
+                    Err(e) => return Err(e),
+                }
+            }
+
+            try!(cvt(libc::socketpair(libc::AF_UNIX, ty, 0, fds.as_mut_ptr())));
+            let a = Socket { fd: fds[0] };
+            let b = Socket { fd: fds[1] };
+            try!(cvt(libc::ioctl(a.fd, libc::FIOCLEX)));
+            try!(cvt(libc::ioctl(b.fd, libc::FIOCLEX)));
+            let mut nonblocking = 1 as c_ulong;
+            try!(cvt(libc::ioctl(a.fd, libc::FIONBIO, &mut nonblocking)));
+            try!(cvt(libc::ioctl(b.fd, libc::FIONBIO, &mut nonblocking)));
+            Ok((a, b))
+        }
+    }
+
+    pub fn fd(&self) -> c_int {
+        self.fd
+    }
+
+    pub fn into_fd(self) -> c_int {
+        let ret = self.fd;
+        mem::forget(self);
+        ret
+    }
+}
+
+impl Drop for Socket {
+    fn drop(&mut self) {
+        unsafe {
+            let _ = libc::close(self.fd);
+        }
+    }
+}
+
+pub unsafe fn sockaddr_un(path: &Path)
+                          -> io::Result<(libc::sockaddr_un, libc::socklen_t)> {
+    let mut addr: libc::sockaddr_un = mem::zeroed();
+    addr.sun_family = libc::AF_UNIX as libc::sa_family_t;
+
+    let bytes = path.as_os_str().as_bytes();
+
+    match (bytes.get(0), bytes.len().cmp(&addr.sun_path.len())) {
+        // Abstract paths don't need a null terminator
+        (Some(&0), Ordering::Greater) => {
+            return Err(io::Error::new(io::ErrorKind::InvalidInput,
+                                      "path must be no longer than SUN_LEN"));
+        }
+        (_, Ordering::Greater) | (_, Ordering::Equal) => {
+            return Err(io::Error::new(io::ErrorKind::InvalidInput,
+                                      "path must be shorter than SUN_LEN"));
+        }
+        _ => {}
+    }
+    for (dst, src) in addr.sun_path.iter_mut().zip(bytes.iter()) {
+        *dst = *src as libc::c_char;
+    }
+    // null byte for pathname addresses is already there because we zeroed the
+    // struct
+
+    let mut len = sun_path_offset() + bytes.len();
+    match bytes.get(0) {
+        Some(&0) | None => {}
+        Some(_) => len += 1,
+    }
+    Ok((addr, len as libc::socklen_t))
+}
+
+fn sun_path_offset() -> usize {
+    unsafe {
+        // Work with an actual instance of the type since using a null pointer is UB
+        let addr: libc::sockaddr_un = mem::uninitialized();
+        let base = &addr as *const _ as usize;
+        let path = &addr.sun_path as *const _ as usize;
+        path - base
+    }
+}
+
diff --git a/third_party/rust/mio-uds/src/stream.rs b/third_party/rust/mio-uds/src/stream.rs
new file mode 100644
index 0000000000..82a283492b
--- /dev/null
+++ b/third_party/rust/mio-uds/src/stream.rs
@@ -0,0 +1,246 @@
+use std::cmp;
+use std::io::prelude::*;
+use std::io;
+use std::os::unix::net;
+use std::os::unix::prelude::*;
+use std::path::Path;
+use std::net::Shutdown;
+
+use iovec::IoVec;
+use iovec::unix as iovec;
+use libc;
+use mio::event::Evented;
+use mio::unix::EventedFd;
+use mio::{Poll, Token, Ready, PollOpt};
+
+use cvt;
+use socket::{sockaddr_un, Socket};
+
+/// A Unix stream socket.
+///
+/// This type represents a `SOCK_STREAM` connection of the `AF_UNIX` family,
+/// otherwise known as Unix domain sockets or Unix sockets. This stream is
+/// readable/writable and acts similarly to a TCP stream where reads/writes are
+/// all in order with respect to the other connected end.
+///
+/// Streams can either be connected to paths locally or another ephemeral socket
+/// created by the `pair` function.
+///
+/// A `UnixStream` implements the `Read`, `Write`, `Evented`, `AsRawFd`,
+/// `IntoRawFd`, and `FromRawFd` traits for interoperating with other I/O code.
+///
+/// Note that all values of this type are typically in nonblocking mode, so the
+/// `read` and `write` methods may return an error with the kind of
+/// `WouldBlock`, indicating that it's not ready to read/write just yet.
+#[derive(Debug)]
+pub struct UnixStream {
+    inner: net::UnixStream,
+}
+
+impl UnixStream {
+    /// Connects to the socket named by `path`.
+    ///
+    /// The socket returned may not be readable and/or writable yet, as the
+    /// connection may be in progress. The socket should be registered with an
+    /// event loop to wait on both of these properties being available.
+    pub fn connect<P: AsRef<Path>>(p: P) -> io::Result<UnixStream> {
+        UnixStream::_connect(p.as_ref())
+    }
+
+    fn _connect(path: &Path) -> io::Result<UnixStream> {
+        unsafe {
+            let (addr, len) = try!(sockaddr_un(path));
+            let socket = try!(Socket::new(libc::SOCK_STREAM));
+            let addr = &addr as *const _ as *const _;
+            match cvt(libc::connect(socket.fd(), addr, len)) {
+                Ok(_) => {}
+                Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {}
+                Err(e) => return Err(e),
+            }
+
+            Ok(UnixStream::from_raw_fd(socket.into_fd()))
+        }
+    }
+
+    /// Consumes a standard library `UnixStream` and returns a wrapped
+    /// `UnixStream` compatible with mio.
+    ///
+    /// The returned stream is moved into nonblocking mode and is otherwise
+    /// ready to get associated with an event loop.
+    pub fn from_stream(stream: net::UnixStream) -> io::Result<UnixStream> {
+        try!(stream.set_nonblocking(true));
+        Ok(UnixStream { inner: stream })
+    }
+
+    /// Creates an unnamed pair of connected sockets.
+    ///
+    /// Returns two `UnixStream`s which are connected to each other.
+    pub fn pair() -> io::Result<(UnixStream, UnixStream)> {
+        Socket::pair(libc::SOCK_STREAM).map(|(a, b)| unsafe {
+            (UnixStream::from_raw_fd(a.into_fd()),
+             UnixStream::from_raw_fd(b.into_fd()))
+        })
+    }
+
+    /// Creates a new independently owned handle to the underlying socket.
+    ///
+    /// The returned `UnixStream` is a reference to the same stream that this
+    /// object references. Both handles will read and write the same stream of
+    /// data, and options set on one stream will be propogated to the other
+    /// stream.
+    pub fn try_clone(&self) -> io::Result<UnixStream> {
+        self.inner.try_clone().map(|s| {
+            UnixStream { inner: s }
+        })
+    }
+
+    /// Returns the socket address of the local half of this connection.
+    pub fn local_addr(&self) -> io::Result<net::SocketAddr> {
+        self.inner.local_addr()
+    }
+
+    /// Returns the socket address of the remote half of this connection.
+    pub fn peer_addr(&self) -> io::Result<net::SocketAddr> {
+        self.inner.peer_addr()
+    }
+
+    /// Returns the value of the `SO_ERROR` option.
+    pub fn take_error(&self) -> io::Result<Option<io::Error>> {
+        self.inner.take_error()
+    }
+
+    /// Shuts down the read, write, or both halves of this connection.
+    ///
+    /// This function will cause all pending and future I/O calls on the
+    /// specified portions to immediately return with an appropriate value
+    /// (see the documentation of `Shutdown`).
+    pub fn shutdown(&self, how: Shutdown) -> io::Result<()> {
+        self.inner.shutdown(how)
+    }
+
+    /// Read in a list of buffers all at once.
+    ///
+    /// This operation will attempt to read bytes from this socket and place
+    /// them into the list of buffers provided. Note that each buffer is an
+    /// `IoVec` which can be created from a byte slice.
+    ///
+    /// The buffers provided will be filled in sequentially. A buffer will be
+    /// entirely filled up before the next is written to.
+    ///
+    /// The number of bytes read is returned, if successful, or an error is
+    /// returned otherwise. If no bytes are available to be read yet then
+    /// a "would block" error is returned. This operation does not block.
+    pub fn read_bufs(&self, bufs: &mut [&mut IoVec]) -> io::Result<usize> {
+        unsafe {
+            let slice = iovec::as_os_slice_mut(bufs);
+            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
+            let rc = libc::readv(self.inner.as_raw_fd(),
+                                slice.as_ptr(),
+                                len as libc::c_int);
+            if rc < 0 {
+                Err(io::Error::last_os_error())
+            } else {
+                Ok(rc as usize)
+            }
+        }
+    }
+
+    /// Write a list of buffers all at once.
+    ///
+    /// This operation will attempt to write a list of byte buffers to this
+    /// socket. Note that each buffer is an `IoVec` which can be created from a
+    /// byte slice.
+    ///
+    /// The buffers provided will be written sequentially. A buffer will be
+    /// entirely written before the next is written.
+    ///
+    /// The number of bytes written is returned, if successful, or an error is
+    /// returned otherwise. If the socket is not currently writable then a
+    /// "would block" error is returned. This operation does not block.
+    pub fn write_bufs(&self, bufs: &[&IoVec]) -> io::Result<usize> {
+        unsafe {
+            let slice = iovec::as_os_slice(bufs);
+            let len = cmp::min(<libc::c_int>::max_value() as usize, slice.len());
+            let rc = libc::writev(self.inner.as_raw_fd(),
+                                 slice.as_ptr(),
+                                 len as libc::c_int);
+            if rc < 0 {
+                Err(io::Error::last_os_error())
+            } else {
+                Ok(rc as usize)
+            }
+        }
+    }
+}
+
+impl Evented for UnixStream {
+    fn register(&self,
+                poll: &Poll,
+                token: Token,
+                events: Ready,
+                opts: PollOpt) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).register(poll, token, events, opts)
+    }
+
+    fn reregister(&self,
+                  poll: &Poll,
+                  token: Token,
+                  events: Ready,
+                  opts: PollOpt) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).reregister(poll, token, events, opts)
+    }
+
+    fn deregister(&self, poll: &Poll) -> io::Result<()> {
+        EventedFd(&self.as_raw_fd()).deregister(poll)
+    }
+}
+
+impl Read for UnixStream {
+    fn read(&mut self, bytes: &mut [u8]) -> io::Result<usize> {
+        self.inner.read(bytes)
+    }
+}
+
+impl<'a> Read for &'a UnixStream {
+    fn read(&mut self, bytes: &mut [u8]) -> io::Result<usize> {
+        (&self.inner).read(bytes)
+    }
+}
+
+impl Write for UnixStream {
+    fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
+        self.inner.write(bytes)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        self.inner.flush()
+    }
+}
+
+impl<'a> Write for &'a UnixStream {
+    fn write(&mut self, bytes: &[u8]) -> io::Result<usize> {
+        (&self.inner).write(bytes)
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        (&self.inner).flush()
+    }
+}
+
+impl AsRawFd for UnixStream {
+    fn as_raw_fd(&self) -> i32 {
+        self.inner.as_raw_fd()
+    }
+}
+
+impl IntoRawFd for UnixStream {
+    fn into_raw_fd(self) -> i32 {
+        self.inner.into_raw_fd()
+    }
+}
+
+impl FromRawFd for UnixStream {
+    unsafe fn from_raw_fd(fd: i32) -> UnixStream {
+        UnixStream { inner: net::UnixStream::from_raw_fd(fd) }
+    }
+}