101 lines
3.5 KiB
HTML
Executable File
101 lines
3.5 KiB
HTML
Executable File
<?xml version="1.0" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>OPENSSL_fork_prepare</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<link rev="made" href="mailto:root@localhost" />
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</head>
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<body style="background-color: white">
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<!-- INDEX BEGIN -->
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<div name="index">
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<p><a name="__index__"></a></p>
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<ul>
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<li><a href="#name">NAME</a></li>
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<li><a href="#synopsis">SYNOPSIS</a></li>
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<li><a href="#description">DESCRIPTION</a></li>
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<li><a href="#return_values">RETURN VALUES</a></li>
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<li><a href="#see_also">SEE ALSO</a></li>
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<li><a href="#history">HISTORY</a></li>
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<li><a href="#copyright">COPYRIGHT</a></li>
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</ul>
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<hr name="index" />
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</div>
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<!-- INDEX END -->
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<p>
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</p>
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<hr />
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<h1><a name="name">NAME</a></h1>
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<p>OPENSSL_fork_prepare,
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OPENSSL_fork_parent,
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OPENSSL_fork_child
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- OpenSSL fork handlers</p>
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<p>
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</p>
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<hr />
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<h1><a name="synopsis">SYNOPSIS</a></h1>
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<pre>
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#include <openssl/crypto.h></pre>
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<pre>
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void OPENSSL_fork_prepare(void);
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void OPENSSL_fork_parent(void);
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void OPENSSL_fork_child(void);</pre>
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<p>
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</p>
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<hr />
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<h1><a name="description">DESCRIPTION</a></h1>
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<p>OpenSSL has state that should be reset when a process forks. For example,
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the entropy pool used to generate random numbers (and therefore encryption
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keys) should not be shared across multiple programs.
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The <code>OPENSSL_fork_prepare()</code>, <code>OPENSSL_fork_parent()</code>, and <code>OPENSSL_fork_child()</code>
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functions are used to reset this internal state.</p>
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<p>Platforms without <code>fork(2)</code> will probably not need to use these functions.
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Platforms with <code>fork(2)</code> but without <code>pthread_atfork(3)</code> will probably need
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to call them manually, as described in the following paragraph. Platforms
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such as Linux that have both functions will normally not need to call these
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functions as the OpenSSL library will do so automatically.</p>
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<p><em>OPENSSL_init_crypto(3)</em> will register these functions with the appropriate
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handler, when the <strong>OPENSSL_INIT_ATFORK</strong> flag is used. For other
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applications, these functions can be called directly. They should be used
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according to the calling sequence described by the <code>pthread_atfork(3)</code>
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documentation, which is summarized here. <code>OPENSSL_fork_prepare()</code> should
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be called before a <code>fork()</code> is done. After the <code>fork()</code> returns, the parent
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process should call <code>OPENSSL_fork_parent()</code> and the child process should
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call <code>OPENSSL_fork_child()</code>.</p>
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<p>
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</p>
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<hr />
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<h1><a name="return_values">RETURN VALUES</a></h1>
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<p><code>OPENSSL_fork_prepare()</code>, <code>OPENSSL_fork_parent()</code> and <code>OPENSSL_fork_child()</code> do not
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return values.</p>
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<p>
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</p>
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<hr />
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<h1><a name="see_also">SEE ALSO</a></h1>
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<p><em>OPENSSL_init_crypto(3)</em></p>
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<p>
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</p>
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<hr />
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<h1><a name="history">HISTORY</a></h1>
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<p>These functions were added in OpenSSL 1.1.1.</p>
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<p>
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</p>
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<hr />
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<h1><a name="copyright">COPYRIGHT</a></h1>
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<p>Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.</p>
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<p>Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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<a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>
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</body>
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</html>
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