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committer: Anas Nashif <anas.nashif@intel.com> 2012-10-30 12:57:26 -0700
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+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
+<title>Stream-Oriented File Descriptors</title>
+<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css">
+<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
+<link rel="home" href="../../../boost_asio.html" title="Boost.Asio">
+<link rel="up" href="../posix.html" title="POSIX-Specific Functionality">
+<link rel="prev" href="local.html" title="UNIX Domain Sockets">
+<link rel="next" href="fork.html" title="Fork">
+</head>
+<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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+<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td>
+<td align="center"><a href="../../../../../index.html">Home</a></td>
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+<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td>
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+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="local.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="fork.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+<div class="section">
+<div class="titlepage"><div><div><h4 class="title">
+<a name="boost_asio.overview.posix.stream_descriptor"></a><a class="link" href="stream_descriptor.html" title="Stream-Oriented File Descriptors">Stream-Oriented
+        File Descriptors</a>
+</h4></div></div></div>
+<p>
+          Boost.Asio includes classes added to permit synchronous and asynchronous
+          read and write operations to be performed on POSIX file descriptors, such
+          as pipes, standard input and output, and various devices (but <span class="emphasis"><em>not</em></span>
+          regular files).
+        </p>
+<p>
+          For example, to perform read and write operations on standard input and
+          output, the following objects may be created:
+        </p>
+<pre class="programlisting"><span class="identifier">posix</span><span class="special">::</span><span class="identifier">stream_descriptor</span> <span class="identifier">in</span><span class="special">(</span><span class="identifier">my_io_service</span><span class="special">,</span> <span class="special">::</span><span class="identifier">dup</span><span class="special">(</span><span class="identifier">STDIN_FILENO</span><span class="special">));</span>
+<span class="identifier">posix</span><span class="special">::</span><span class="identifier">stream_descriptor</span> <span class="identifier">out</span><span class="special">(</span><span class="identifier">my_io_service</span><span class="special">,</span> <span class="special">::</span><span class="identifier">dup</span><span class="special">(</span><span class="identifier">STDOUT_FILENO</span><span class="special">));</span>
+</pre>
+<p>
+          These are then used as synchronous or asynchronous read and write streams.
+          This means the objects can be used with any of the <a class="link" href="../../reference/read.html" title="read">read()</a>,
+          <a class="link" href="../../reference/async_read.html" title="async_read">async_read()</a>, <a class="link" href="../../reference/write.html" title="write">write()</a>, <a class="link" href="../../reference/async_write.html" title="async_write">async_write()</a>,
+          <a class="link" href="../../reference/read_until.html" title="read_until">read_until()</a> or
+          <a class="link" href="../../reference/async_read_until.html" title="async_read_until">async_read_until()</a>
+          free functions.
+        </p>
+<h6>
+<a name="boost_asio.overview.posix.stream_descriptor.h0"></a>
+          <span><a name="boost_asio.overview.posix.stream_descriptor.see_also"></a></span><a class="link" href="stream_descriptor.html#boost_asio.overview.posix.stream_descriptor.see_also">See Also</a>
+        </h6>
+<p>
+          <a class="link" href="../../reference/posix__stream_descriptor.html" title="posix::stream_descriptor">posix::stream_descriptor</a>,
+          <a class="link" href="../../reference/posix__basic_stream_descriptor.html" title="posix::basic_stream_descriptor">posix::basic_stream_descriptor</a>,
+          <a class="link" href="../../reference/posix__stream_descriptor_service.html" title="posix::stream_descriptor_service">posix::stream_descriptor_service</a>,
+          <a class="link" href="../../examples.html#boost_asio.examples.chat">Chat example</a>.
+        </p>
+<h6>
+<a name="boost_asio.overview.posix.stream_descriptor.h1"></a>
+          <span><a name="boost_asio.overview.posix.stream_descriptor.notes"></a></span><a class="link" href="stream_descriptor.html#boost_asio.overview.posix.stream_descriptor.notes">Notes</a>
+        </h6>
+<p>
+          POSIX stream descriptors are only available at compile time if supported
+          by the target operating system. A program may test for the macro <code class="computeroutput"><span class="identifier">BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR</span></code>
+          to determine whether they are supported.
+        </p>
+</div>
+<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
+<td align="left"></td>
+<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2012 Christopher M. Kohlhoff<p>
+        Distributed under the Boost Software License, Version 1.0. (See accompanying
+        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
+      </p>
+</div></td>
+</tr></table>
+<hr>
+<div class="spirit-nav">
+<a accesskey="p" href="local.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../posix.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../boost_asio.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="fork.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a>
+</div>
+</body>
+</html>
author	Anas Nashif <anas.nashif@intel.com>	2012-10-30 12:57:26 -0700
committer	Anas Nashif <anas.nashif@intel.com>	2012-10-30 12:57:26 -0700
commit	1a78a62555be32868418fe52f8e330c9d0f95d5a (patch)
tree	d3765a80e7d3b9640ec2e930743630cd6b9fce2b /doc/html/boost_asio/overview/posix/stream_descriptor.html
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