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&lt;div id=&quot;preamble&quot;&gt;&lt;h1&gt;Apache Module mod_dav_lock&lt;/h1&gt;
&lt;div class=&quot;toplang&quot;&gt;
&lt;p&gt;&lt;span&gt;Available Languages: &lt;/span&gt;&lt;a href=&quot;../en/mod/mod_dav_lock.html&quot; title=&quot;English&quot;&gt;&amp;nbsp;en&amp;nbsp;&lt;/a&gt; |
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&lt;a href=&quot;../ja/mod/mod_dav_lock.html&quot; hreflang=&quot;ja&quot; rel=&quot;alternate&quot; title=&quot;Japanese&quot;&gt;&amp;nbsp;ja&amp;nbsp;&lt;/a&gt;&lt;/p&gt;
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&lt;table class=&quot;module&quot;&gt;&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;module-dict.html#Description&quot;&gt;Description:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;Generic locking module for &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav.html&quot;&gt;mod_dav&lt;/a&gt;&lt;/code&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;module-dict.html#Status&quot;&gt;Status:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;Extension&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;module-dict.html#ModuleIdentifier&quot;&gt;Module Identifier:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;dav_lock_module&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;module-dict.html#SourceFile&quot;&gt;Source File:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;mod_dav_lock.c&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;module-dict.html#Compatibility&quot;&gt;Compatibility:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;Available in version 2.1 and later&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;
&lt;h3&gt;Summary&lt;/h3&gt;

    &lt;p&gt;This module implements a generic locking API which can be used by any
    backend provider of &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav.html&quot;&gt;mod_dav&lt;/a&gt;&lt;/code&gt;. It &lt;em&gt;requires&lt;/em&gt; at least
    the service of &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav.html&quot;&gt;mod_dav&lt;/a&gt;&lt;/code&gt;. But without a backend provider
    which makes use of it, it&#039;s useless and should not be loaded into the
    server. A sample backend module which actually utilizes
    &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav_lock.html&quot;&gt;mod_dav_lock&lt;/a&gt;&lt;/code&gt; is &lt;a href=&quot;http://subversion.apache.org/&quot;&gt;mod_dav_svn&lt;/a&gt;, the subversion provider module.&lt;/p&gt;

    &lt;p&gt;Note that &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav_fs.html&quot;&gt;mod_dav_fs&lt;/a&gt;&lt;/code&gt; does &lt;em&gt;not&lt;/em&gt; need this
    generic locking module, because it uses its own more specialized
    version.&lt;/p&gt;

    &lt;p&gt;In order to make &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav_lock.html&quot;&gt;mod_dav_lock&lt;/a&gt;&lt;/code&gt; functional, you just have
    to specify the location of the lock database using the &lt;code class=&quot;directive&quot;&gt;&lt;a href=&quot;#davgenericlockdb&quot;&gt;DavGenericLockDB&lt;/a&gt;&lt;/code&gt; directive described
    below.&lt;/p&gt;

    &lt;div class=&quot;note&quot;&gt;&lt;h3&gt;Developer&#039;s Note&lt;/h3&gt;
      &lt;p&gt;In order to retrieve the pointer to the locking provider function, you
      have to use the &lt;code&gt;ap_lookup_provider&lt;/code&gt; API with the arguments
      &lt;code&gt;dav-lock&lt;/code&gt;, &lt;code&gt;generic&lt;/code&gt;, and &lt;code&gt;0&lt;/code&gt;.&lt;/p&gt;
    &lt;/div&gt;
&lt;/div&gt;
&lt;div id=&quot;quickview&quot;&gt;&lt;a href=&quot;https://www.apache.org/foundation/contributing.html&quot; class=&quot;badge&quot;&gt;&lt;img src=&quot;https://www.apache.org/images/SupportApache-small.png&quot; alt=&quot;Support Apache!&quot; /&gt;&lt;/a&gt;&lt;h3 class=&quot;directives&quot;&gt;Directives&lt;/h3&gt;
&lt;ul id=&quot;toc&quot;&gt;
&lt;li&gt;&lt;img alt=&quot;&quot; src=&quot;../images/down.gif&quot; /&gt; &lt;a href=&quot;#davgenericlockdb&quot;&gt;DavGenericLockDB&lt;/a&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;h3&gt;Bugfix checklist&lt;/h3&gt;&lt;ul class=&quot;seealso&quot;&gt;&lt;li&gt;&lt;a href=&quot;https://www.apache.org/dist/httpd/CHANGES_2.4&quot;&gt;httpd changelog&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href=&quot;https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;amp;list_id=144532&amp;amp;product=Apache%20httpd-2&amp;amp;query_format=specific&amp;amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;amp;component=mod_dav_lock&quot;&gt;Known issues&lt;/a&gt;&lt;/li&gt;&lt;li&gt;&lt;a href=&quot;https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;amp;component=mod_dav_lock&quot;&gt;Report a bug&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;&lt;h3&gt;See also&lt;/h3&gt;
&lt;ul class=&quot;seealso&quot;&gt;
&lt;li&gt;&lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav.html&quot;&gt;mod_dav&lt;/a&gt;&lt;/code&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href=&quot;#comments_section&quot;&gt;Comments&lt;/a&gt;&lt;/li&gt;&lt;/ul&gt;&lt;/div&gt;

&lt;div class=&quot;top&quot;&gt;&lt;a href=&quot;#page-header&quot;&gt;&lt;img alt=&quot;top&quot; src=&quot;../images/up.gif&quot; /&gt;&lt;/a&gt;&lt;/div&gt;
&lt;div class=&quot;directive-section&quot;&gt;&lt;h2&gt;&lt;a name=&quot;DavGenericLockDB&quot; id=&quot;DavGenericLockDB&quot;&gt;DavGenericLockDB&lt;/a&gt; &lt;a name=&quot;davgenericlockdb&quot; id=&quot;davgenericlockdb&quot;&gt;Directive&lt;/a&gt;&lt;/h2&gt;
&lt;table class=&quot;directive&quot;&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;directive-dict.html#Description&quot;&gt;Description:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;Location of the DAV lock database&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;directive-dict.html#Syntax&quot;&gt;Syntax:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;&lt;code&gt;DavGenericLockDB &lt;var&gt;file-path&lt;/var&gt;&lt;/code&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;directive-dict.html#Context&quot;&gt;Context:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;server config, virtual host, directory&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;directive-dict.html#Status&quot;&gt;Status:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;Extension&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;th&gt;&lt;a href=&quot;directive-dict.html#Module&quot;&gt;Module:&lt;/a&gt;&lt;/th&gt;&lt;td&gt;mod_dav_lock&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
    &lt;p&gt;Use the &lt;code class=&quot;directive&quot;&gt;DavGenericLockDB&lt;/code&gt; directive to specify
    the full path to the lock database, excluding an extension. If
    the path is not absolute, it will be interpreted relative to &lt;code class=&quot;directive&quot;&gt;&lt;a href=&quot;../mod/core.html#serverroot&quot;&gt;ServerRoot&lt;/a&gt;&lt;/code&gt;. The implementation of
    &lt;code class=&quot;module&quot;&gt;&lt;a href=&quot;../mod/mod_dav_lock.html&quot;&gt;mod_dav_lock&lt;/a&gt;&lt;/code&gt; uses a SDBM database to track user
    locks.&lt;/p&gt;

    &lt;div class=&quot;example&quot;&gt;&lt;h3&gt;Example&lt;/h3&gt;&lt;pre class=&quot;prettyprint lang-config&quot;&gt;DavGenericLockDB var/DavLock&lt;/pre&gt;
&lt;/div&gt;

    &lt;p&gt;The directory containing the lock database file must be
    writable by the &lt;code class=&quot;directive&quot;&gt;&lt;a href=&quot;../mod/mod_unixd.html#user&quot;&gt;User&lt;/a&gt;&lt;/code&gt;
    and &lt;code class=&quot;directive&quot;&gt;&lt;a href=&quot;../mod/mod_unixd.html#group&quot;&gt;Group&lt;/a&gt;&lt;/code&gt; under which
    Apache is running.  For security reasons, you should create a
    directory for this purpose rather than changing the permissions on
    an existing directory.  In the above example, Apache will create
    files in the &lt;code&gt;var/&lt;/code&gt; directory under the &lt;code class=&quot;directive&quot;&gt;&lt;a href=&quot;../mod/core.html#serverroot&quot;&gt;ServerRoot&lt;/a&gt;&lt;/code&gt; with the base filename
    &lt;code&gt;DavLock&lt;/code&gt; and an extension added by the server.&lt;/p&gt;


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