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9.9 KiB
HTML
212 lines
9.9 KiB
HTML
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<?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_intermediate_dir_mode()</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="env.html" title="Chapter 5. The DB_ENV Handle" />
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<link rel="prev" href="envset_flags.html" title="DB_ENV->set_flags()" />
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<link rel="next" href="envset_isalive.html" title="DB_ENV->set_isalive()" />
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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 11.2.5.2</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_intermediate_dir_mode()</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_flags.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 5.
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The DB_ENV Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="envset_isalive.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_intermediate_dir_mode"></a>DB_ENV->set_intermediate_dir_mode()</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_intermediate_dir_mode(DB_ENV *dbenv, const char *mode); </pre>
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<p>
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By default, Berkeley DB does not create intermediate directories
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needed for recovery, that is, if the file <span class="bold"><strong>/a/b/c/mydatabase</strong></span> is being recovered, and the
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directory path <span class="bold"><strong>b/c</strong></span> does not exist,
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recovery will fail. This default behavior is because Berkeley DB
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does not know what permissions are appropriate for intermediate
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directory creation, and creating the directory might result in a
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security problem.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_intermediate_dir_mode()</code> method causes Berkeley DB to
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create any intermediate directories needed during recovery, using the
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specified permissions.
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</p>
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<p>
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On UNIX systems or in IEEE/ANSI Std 1003.1 (POSIX) environments,
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created directories are owned by the process owner; the group
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ownership of created directories is based on the system and directory
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defaults, and is not further specified by Berkeley DB.
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</p>
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<p>
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The database environment's intermediate directory permissions may
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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
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syntax of the entry in that file is a single line with the string
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"set_intermediate_dir_mode", one or more whitespace characters,
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and the directory permissions. Because the <a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a> file is
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read when the database environment is opened, it will silently
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overrule 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_intermediate_dir_mode()</code> method configures operations
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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, not all
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operations performed on the underlying database environment.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_intermediate_dir_mode()</code> method may not be called
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after the <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a>
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method is called.
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</p>
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<p>
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The <code class="methodname">DB_ENV->set_intermediate_dir_mode()</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="id3894524"></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="id3894518"></a>mode</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>mode</strong></span> parameter specifies the
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directory permissions.
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</p>
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<p>
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Directory permissions are interpreted as a string of nine characters,
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using the character set <span class="bold"><strong>r</strong></span> (read),
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<span class="bold"><strong>w</strong></span> (write), <span class="bold"><strong>x</strong></span> (execute or search), and <span class="bold"><strong>-</strong></span> (none). The first character is the read
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permissions for the directory owner (set to either <span class="bold"><strong>r</strong></span> or <span class="bold"><strong>-</strong></span>). The
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second character is the write permissions for the directory owner (set
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to either <span class="bold"><strong>w</strong></span> or <span class="bold"><strong>-</strong></span>). The third character is the execute
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permissions for the directory owner (set to either <span class="bold"><strong>x</strong></span> or <span class="bold"><strong>-</strong></span>).
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</p>
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<p>
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Similarly, the second set of three characters are the read, write and
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execute/search permissions for the directory group, and the third set
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of three characters are the read, write and execute/search permissions
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for all others. For example, the string <span class="bold"><strong>rwx------</strong></span> would configure read, write and
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execute/search access for the owner only. The string <span class="bold"><strong>rwxrwx---</strong></span> would configure read, write and
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execute/search access for both the owner and the group. The string
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<span class="bold"><strong>rwxr-----</strong></span> would configure read, write
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and execute/search access for the directory owner and read-only access
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for the directory group.
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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="id3895113"></a>Errors</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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The <code class="methodname">DB_ENV->set_intermediate_dir_mode()</code>
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<span>
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<span>
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method may fail and return one of the following non-zero errors:
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</span>
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</span>
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</p>
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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="id3895709"></a>EINVAL</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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If the method was called after <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a>
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was called; or if an invalid flag value or parameter was specified.
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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="id3894074"></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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</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="id3895742"></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="env.html#envlist" title="Database Environments and Related Methods">Database Environments 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_flags.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="env.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="envset_isalive.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_flags() </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_isalive()</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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