mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
158 lines
6.6 KiB
HTML
158 lines
6.6 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
|||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|||
|
|
<head>
|
|||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
|||
|
|
<title>DbEnv::set_lg_filemode()</title>
|
|||
|
|
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
|
|||
|
|
<link rel="up" href="lsn.html" title="Chapter 8. The DbLsn Handle" />
|
|||
|
|
<link rel="prev" href="envset_lg_dir.html" title="DbEnv::set_lg_dir()" />
|
|||
|
|
<link rel="next" href="envset_lg_max.html" title="DbEnv::set_lg_max()" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center">DbEnv::set_lg_filemode()</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="envset_lg_dir.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 8.
|
|||
|
|
The DbLsn Handle
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="envset_lg_max.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="envset_lg_filemode"></a>DbEnv::set_lg_filemode()</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<pre class="programlisting">#include <db_cxx.h>
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
DbEnv::set_lg_filemode(int lg_filemode); </pre>
|
|||
|
|
<p>
|
|||
|
|
Set the absolute file mode for created log files. This method is
|
|||
|
|
<span class="bold"><strong>only</strong></span> useful for the rare Berkeley DB
|
|||
|
|
application that does not control its umask value.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Normally, if Berkeley DB applications set their umask appropriately,
|
|||
|
|
all processes in the application suite will have read permission on
|
|||
|
|
the log files created by any process in the application suite.
|
|||
|
|
However, if the Berkeley DB application is a library, a process using
|
|||
|
|
the library might set its umask to a value preventing other processes
|
|||
|
|
in the application suite from reading the log files it creates. In
|
|||
|
|
this rare case, the <code class="methodname">DbEnv::set_lg_filemode()</code> method can be used to
|
|||
|
|
set the mode of created log files to an absolute value.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The database environment's log file mode may also be configured
|
|||
|
|
using the environment's <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file. The syntax of the entry
|
|||
|
|
in that file is a single line with the string "set_lg_filemode",
|
|||
|
|
one or more whitespace characters, and the absolute mode of
|
|||
|
|
created log files. Because the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is read when the
|
|||
|
|
database environment is opened, it will silently overrule
|
|||
|
|
configuration done before that time.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::set_lg_filemode()</code> method configures a database
|
|||
|
|
environment, not only operations performed using the specified
|
|||
|
|
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> handle.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::set_lg_filemode()</code> method may be called at any time during
|
|||
|
|
the life of the application.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::set_lg_filemode()</code> <span>
|
|||
|
|
|
|||
|
|
<span>
|
|||
|
|
method either returns a non-zero error value or throws an
|
|||
|
|
exception that encapsulates a non-zero error value on
|
|||
|
|
failure, and returns 0 on success.
|
|||
|
|
</span>
|
|||
|
|
</span>
|
|||
|
|
</p>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3641354"></a>Parameters</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3641360"></a>lg_filemode</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>lg_filemode</strong></span> parameter is the
|
|||
|
|
absolute mode of the created log file.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3640678"></a>Class</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
|
|||
|
|
<a class="link" href="logc.html" title="The DbLogc Handle">DbLogc</a>,
|
|||
|
|
<a class="link" href="lsn.html" title="Chapter 8. The DbLsn Handle">DbLsn</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3641341"></a>See Also</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="lsn.html#loglist" title="Logging Subsystem and Related Methods">Logging Subsystem and Related Methods</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="envset_lg_dir.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="lsn.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="envset_lg_max.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">DbEnv::set_lg_dir() </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> DbEnv::set_lg_max()</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|