166 lines
4.5 KiB
HTML
166 lines
4.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>send_file64()--Send a File over a Socket Connection</title>
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Begin Header Records ========================================== -->
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<!-- Unix8 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!--End Header Records -->
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<!-- Edited by Kersten Feb 02 -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="Top_Of_Page"></a>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>send_file64()--Send a File over a Socket Connection</h2>
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<div class="box" style="width: 50%;">
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<br>
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Syntax<br>
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<pre>
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#include <sys/types.h>
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#include <sys/socket.h>
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int send_file64(int *<em>socket_descriptor</em>,
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struct sf_parms64 *<em>sf_struct</em>,
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int <em>flags</em>)
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</pre>
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<br>
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Service Program Name: QSOSRV1<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Conditional; see <a href="#USAGE_NOTES">Usage Notes</a>.<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <em>send_file64()</em> function is used to send the contents of an open
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file over an existing socket connection.</p>
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<p>The <em>send_file64()</em> API is a combination of the IFS <em>read()</em>
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and the sockets <em>send()</em> and <em>close()</em> APIs. Socket applications
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that transmit a file over a socket connection can, under certain circumstances,
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obtain improved performance by using <em>send_file64()</em>.</p>
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<p><em>send_file64()</em> is enabled for large files. It is capable of
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operating on files larger than 2 GB minus 1 byte. For additional information on
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the parameters, authorities required, return values, error conditions, error
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messages, and other usage notes, see <a href="send.htm">send_file()--Send a
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File over a Socket Connection</a>.</p>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>socket_descriptor</strong></dt>
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<dd>(Input/Output) A pointer to the socket descriptor that is to be written
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to.<br>
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<br>
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</dd>
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<dt><strong>sf_struct</strong></dt>
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<dd>(Input/Output) A pointer to the send_file64 structure that contains the
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following:<br>
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<br>
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<ul>
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<li>The header buffer and length.<br>
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<br>
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</li>
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<li>The file descriptor, the offset into the file, the file size, and the
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number of bytes to send from the file.<br>
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<br>
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</li>
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<li>The trailer buffer and length.<br>
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<br>
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</li>
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<li>The number of bytes of data that were sent.</li>
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</ul>
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<p>The structure pointed to by the <em>sf_struct</em> parameter is defined in
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<strong><sys/socket.h></strong>.</p>
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<pre>
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struct sf_parms64
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{
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void *header_data;
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size_t header_length;
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int file_descriptor;
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unsigned long long file_size;
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long long file_offset;
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long long file_bytes;
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void *trailer_data;
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size_t trailer_length;
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unsigned long long bytes_sent;
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}
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</pre>
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<br>
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<br>
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</dd>
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<dt><strong>flags</strong></dt>
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<dd>(Input) A flag value that controls what is done with the socket connection
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after the data has been transmitted.</dd>
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</dl>
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<br>
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<h3>Authorities</h3>
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<p>No authorization is required.</p>
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<br>
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<h3><a name="USAGE_NOTES">Usage Notes</a></h3>
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<ol>
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<li>When you develop in C-based languages, the prototypes for the 64-bit APIs
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are normally hidden. To use the <em>send_file64()</em> API, you must compile
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the source with the _LARGE_FILE_API macro defined.<br>
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<br>
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</li>
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<li>All of the Usage Notes for <em>send_file()</em> apply to
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<em>send_file64()</em>. See <a href="send.htm#HDRSDFUSAG">Usage Notes</a> in
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the <em>send_file()</em> API.</li>
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</ol>
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<br>
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<hr>
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API introduced: V4R4
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<hr>
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<center>
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|
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> |
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<a href="unix.htm">UNIX-Type APIs</a> |
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<a href="aplist.htm">APIs by category</a> </td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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