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127 lines
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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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<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
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<title>mod_dav_lock - Apache HTTP Server Version 2.5</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<img alt="" src="../images/feather.png" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_dav_lock</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_dav_lock.html" title="English"> en </a> |
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<a href="../fr/mod/mod_dav_lock.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_dav_lock.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Generic locking module for <code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code></td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>dav_lock_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_dav_lock.c</td></tr></table>
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<h3>Summary</h3>
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<p>This module implements a generic locking API which can be used by any
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backend provider of <code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code>. It <em>requires</em> at least
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the service of <code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code>. But without a backend provider
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which makes use of it, it's useless and should not be loaded into the
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server. A sample backend module which actually utilizes
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<code class="module"><a href="../mod/mod_dav_lock.html">mod_dav_lock</a></code> is <a href="http://subversion.apache.org/">mod_dav_svn</a>, the subversion provider module.</p>
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<p>Note that <code class="module"><a href="../mod/mod_dav_fs.html">mod_dav_fs</a></code> does <em>not</em> need this
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generic locking module, because it uses its own more specialized
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version.</p>
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<p>In order to make <code class="module"><a href="../mod/mod_dav_lock.html">mod_dav_lock</a></code> functional, you just have
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to specify the location of the lock database using the <code class="directive"><a href="#davgenericlockdb">DavGenericLockDB</a></code> directive described
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below.</p>
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<div class="note"><h3>Developer's Note</h3>
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<p>In order to retrieve the pointer to the locking provider function, you
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have to use the <code>ap_lookup_provider</code> API with the arguments
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<code>dav-lock</code>, <code>generic</code>, and <code>0</code>.</p>
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</div>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<ul id="toc">
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<li><img alt="" src="../images/down.gif" /> <a href="#davgenericlockdb">DavGenericLockDB</a></li>
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</ul>
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<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_dav_lock">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_dav_lock">Report a bug</a></li></ul><h3>See also</h3>
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<ul class="seealso">
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<li><code class="module"><a href="../mod/mod_dav.html">mod_dav</a></code></li>
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<li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="DavGenericLockDB" id="DavGenericLockDB">DavGenericLockDB</a> <a name="davgenericlockdb" id="davgenericlockdb">Directive</a> <a title="Permanent link" href="#davgenericlockdb" class="permalink">¶</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Location of the DAV lock database</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DavGenericLockDB <var>file-path</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav_lock</td></tr>
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</table>
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<p>Use the <code class="directive">DavGenericLockDB</code> directive to specify
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the full path to the lock database, excluding an extension. If
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the path is not absolute, it will be interpreted relative to <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code>. The implementation of
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<code class="module"><a href="../mod/mod_dav_lock.html">mod_dav_lock</a></code> uses a SDBM database to track user
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locks.</p>
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<div class="example"><h3>Example</h3><pre class="prettyprint lang-config">DavGenericLockDB var/DavLock</pre>
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</div>
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<p>The directory containing the lock database file must be
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writable by the <code class="directive"><a href="../mod/mod_unixd.html#user">User</a></code>
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and <code class="directive"><a href="../mod/mod_unixd.html#group">Group</a></code> under which
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Apache is running. For security reasons, you should create a
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directory for this purpose rather than changing the permissions on
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an existing directory. In the above example, Apache will create
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files in the <code>var/</code> directory under the <code class="directive"><a href="../mod/core.html#serverroot">ServerRoot</a></code> with the base filename
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<code>DavLock</code> and an extension added by the server.</p>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_dav_lock.html" title="English"> en </a> |
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<a href="../fr/mod/mod_dav_lock.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_dav_lock.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a></p>
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</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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