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172 lines
6.8 KiB
HTML
172 lines
6.8 KiB
HTML
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>DB_ENV->get_backup_callbacks()</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
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<link rel="up" href="env.html" title="Chapter 5. The DB_ENV Handle" />
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<link rel="prev" href="envget_errpfx.html" title="DB_ENV->get_errpfx()" />
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<link rel="next" href="envget_backup_config.html" title="DB_ENV->get_backup_config()" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.3</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">DB_ENV->get_backup_callbacks()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="envget_errpfx.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 5.
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The DB_ENV Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envget_backup_config.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="envget_backup_callbacks"></a>DB_ENV->get_backup_callbacks()</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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DB_ENV->get_backup_callbacks(DB_ENV,
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int (**open_func)(DB_ENV *, const char *dbname,
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const char *target, void **handle),
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int (**write_func)(DB_ENV *, u_int32_t offset_gbytes,
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u_int32_t offset_bytes, u_int32_t size,
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u_int8_t *buf, void *handle),
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int (**close_func)(DB_ENV *, const char *dbname, void *handle)); </pre>
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<p>
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The <code class="methodname">DB_ENV->get_backup_callbacks()</code> method
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retrieves the three callback functions which can be used by the
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<a class="xref" href="envbackup.html" title="DB_ENV->backup()">DB_ENV->backup()</a>
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or
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<a class="xref" href="envdbbackup.html" title="DB_ENV->dbbackup()">DB_ENV->dbbackup()</a>
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methods to override their default behavior. These callbacks are
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configured using the
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<a class="xref" href="envset_backup_callbacks.html" title="DB_ENV->set_backup_callbacks()">DB_ENV->set_backup_callbacks()</a>
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method.
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</p>
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<p>
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The <code class="methodname">DB_ENV->get_backup_callbacks()</code> method may
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be called at any time during the life of the application.
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</p>
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<p>
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The <code class="methodname">DB_ENV->get_backup_callbacks()</code> <span>
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<span>
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method returns a non-zero error value on failure and 0 on success.
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</span>
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</span>
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp59467144"></a>Parameters</h3>
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp59466496"></a>open_func</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>open_func</strong></span> parameter
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is the function used when a target location is opened
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during a backup.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp59463040"></a>write_func</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>close_func</strong></span> parameter
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is the function used to write data during a backup.
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</p>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="idp59457360"></a>close_func</h4>
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</div>
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</div>
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</div>
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<p>
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The <span class="bold"><strong>close_func</strong></span> parameter
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is the function used when ending a backup and closing a
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backup target.
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</p>
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</div>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp59470640"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a>
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</p>
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</div>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="idp59462240"></a>See Also</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>,
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<a class="xref" href="envset_backup_callbacks.html" title="DB_ENV->set_backup_callbacks()">DB_ENV->set_backup_callbacks()</a>,
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<a class="xref" href="envbackup.html" title="DB_ENV->backup()">DB_ENV->backup()</a>, and
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<a class="xref" href="envdbbackup.html" title="DB_ENV->dbbackup()">DB_ENV->dbbackup()</a>.
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</p>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="envget_errpfx.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="env.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="envget_backup_config.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">DB_ENV->get_errpfx() </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> DB_ENV->get_backup_config()</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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