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155 lines
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HTML
155 lines
6.6 KiB
HTML
<?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->set_lg_filemode()</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="lsn.html" title="Chapter 7. The DB_LSN Handle" />
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<link rel="prev" href="envset_lg_dir.html" title="DB_ENV->set_lg_dir()" />
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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->set_lg_filemode()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="envset_lg_dir.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 7.
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The DB_LSN Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envset_lg_max.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="envset_lg_filemode"></a>DB_ENV->set_lg_filemode()</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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int
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DB_ENV->set_lg_filemode(DB_ENV *dbenv, int lg_filemode); </pre>
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<p>
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Set the absolute file mode for created log files. This method is
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<span class="bold"><strong>only</strong></span> useful for the rare Berkeley DB
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application that does not control its umask value.
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</p>
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<p>
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Normally, if Berkeley DB applications set their umask appropriately,
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all processes in the application suite will have read permission on
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the log files created by any process in the application suite.
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However, if the Berkeley DB application is a library, a process using
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the library might set its umask to a value preventing other processes
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in the application suite from reading the log files it creates. In
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this rare case, the <code class="methodname">DB_ENV->set_lg_filemode()</code> method can be used to
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set the mode of created log files to an absolute value.
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</p>
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<p>
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The database environment's log file mode may also be configured
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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
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in that file is a single line with the string "set_lg_filemode",
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one or more whitespace characters, and the absolute mode of
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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
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database environment is opened, it will silently overrule
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configuration done before that time.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_lg_filemode()</code> method configures a database
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environment, not only operations performed using the specified
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<a class="link" href="env.html" title="Chapter 5. The DB_ENV Handle">DB_ENV</a> handle.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_lg_filemode()</code> method may be called at any time during
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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->set_lg_filemode()</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="idp60994384"></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="idp61009952"></a>lg_filemode</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>lg_filemode</strong></span> parameter is the
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absolute mode of the created log file.
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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="idp61002080"></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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<a class="link" href="logc.html" title="The DB_LOGC Handle">DB_LOGC</a>,
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<a class="link" href="lsn.html" title="Chapter 7. The DB_LSN Handle">DB_LSN</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="idp60991304"></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="lsn.html#loglist" title="Logging Subsystem and Related Methods">Logging Subsystem and Related Methods</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="envset_lg_dir.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="lsn.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="envset_lg_max.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->set_lg_dir() </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->set_lg_max()</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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