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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>&lt;sys/uio.h&gt;</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_009_393">&nbsp;</a>NAME</h4><blockquote>sys/uio.h - definitions for vector I/O operations</blockquote><h4><a name = "tag_000_009_394">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;sys/uio.h&gt;</code></pre></blockquote><h4><a name = "tag_000_009_395">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>&lt;sys/uio.h&gt;</i>header defines the<b>iovec</b>structure that includes at least the following members:<pre><code>void   *iov_base   base address of a memory region for input or outputsize_t  iov_len    the size of the memory pointed to by <i>iov_base</i></code></pre><p>The following are declared as functions and may also be defined as macros.Function prototypes must be provided for use with an ISO Ccompiler.<pre><code>ssize_t <a href="readv.html">readv</a>(int, const struct iovec *, int);ssize_t <a href="writev.html">writev</a>(int, const struct iovec *, int);</code></pre></blockquote><h4><a name = "tag_000_009_396">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_397">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_398">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="read.html">read()</a></i>,<i><a href="write.html">write()</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>

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