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diff --git a/boost/asio/detail/descriptor_ops.hpp b/boost/asio/detail/descriptor_ops.hpp
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+++ b/boost/asio/detail/descriptor_ops.hpp
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+//
+// detail/descriptor_ops.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_DESCRIPTOR_OPS_HPP
+#define BOOST_ASIO_DETAIL_DESCRIPTOR_OPS_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
+
+#include <cstddef>
+#include <boost/system/error_code.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+namespace descriptor_ops {
+
+// Descriptor state bits.
+enum
+{
+  // The user wants a non-blocking descriptor.
+  user_set_non_blocking = 1,
+
+  // The descriptor has been set non-blocking.
+  internal_non_blocking = 2,
+
+  // Helper "state" used to determine whether the descriptor is non-blocking.
+  non_blocking = user_set_non_blocking | internal_non_blocking,
+
+  // The descriptor may have been dup()-ed.
+  possible_dup = 4
+};
+
+typedef unsigned char state_type;
+
+template <typename ReturnType>
+inline ReturnType error_wrapper(ReturnType return_value,
+    boost::system::error_code& ec)
+{
+  ec = boost::system::error_code(errno,
+      boost::asio::error::get_system_category());
+  return return_value;
+}
+
+BOOST_ASIO_DECL int open(const char* path, int flags,
+    boost::system::error_code& ec);
+
+BOOST_ASIO_DECL int close(int d, state_type& state,
+    boost::system::error_code& ec);
+
+BOOST_ASIO_DECL bool set_user_non_blocking(int d,
+    state_type& state, bool value, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL bool set_internal_non_blocking(int d,
+    state_type& state, bool value, boost::system::error_code& ec);
+
+typedef iovec buf;
+
+BOOST_ASIO_DECL std::size_t sync_read(int d, state_type state, buf* bufs,
+    std::size_t count, bool all_empty, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL bool non_blocking_read(int d, buf* bufs, std::size_t count,
+    boost::system::error_code& ec, std::size_t& bytes_transferred);
+
+BOOST_ASIO_DECL std::size_t sync_write(int d, state_type state,
+    const buf* bufs, std::size_t count, bool all_empty,
+    boost::system::error_code& ec);
+
+BOOST_ASIO_DECL bool non_blocking_write(int d,
+    const buf* bufs, std::size_t count,
+    boost::system::error_code& ec, std::size_t& bytes_transferred);
+
+BOOST_ASIO_DECL int ioctl(int d, state_type& state, long cmd,
+    ioctl_arg_type* arg, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL int fcntl(int d, long cmd, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL int fcntl(int d, long cmd,
+    long arg, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL int poll_read(int d,
+    state_type state, boost::system::error_code& ec);
+
+BOOST_ASIO_DECL int poll_write(int d,
+    state_type state, boost::system::error_code& ec);
+
+} // namespace descriptor_ops
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#if defined(BOOST_ASIO_HEADER_ONLY)
+# include <boost/asio/detail/impl/descriptor_ops.ipp>
+#endif // defined(BOOST_ASIO_HEADER_ONLY)
+
+#endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
+
+#endif // BOOST_ASIO_DETAIL_DESCRIPTOR_OPS_HPP