114 lines
5.6 KiB
HTML
114 lines
5.6 KiB
HTML
<!--$Id: env_set_intermediate_dir_mode.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
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<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
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<!--See the file LICENSE for redistribution information.-->
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<html>
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<head>
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<title>Berkeley DB: DB_ENV->set_intermediate_dir_mode</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
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</head>
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<body bgcolor=white>
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<table width="100%"><tr valign=top>
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<td>
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<b>DB_ENV->set_intermediate_dir_mode</b>
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</td>
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<td align=right>
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<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a>
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<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
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</tr></table>
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<hr size=1 noshade>
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<tt>
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<b><pre>
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#include <db.h>
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<p>
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int
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DB_ENV->set_intermediate_dir_mode(DB_ENV *dbenv, const char *mode);
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<p>
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int
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DB_ENV->get_intermediate_dir_mode(DB_ENV *dbenv, const char **modep);
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DB_ENV->set_intermediate_dir_mode</b>
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<p>By default, Berkeley DB does not create intermediate directories needed for
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recovery, that is, if the file <b>/a/b/c/mydatabase</b> is being
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recovered, and the directory path <b>b/c</b> does not exist, recovery
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will fail. This default behavior is because Berkeley DB does not know what
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permissions are appropriate for intermediate directory creation, and
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creating the directory might result in a security problem.</p>
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<p>The DB_ENV->set_intermediate_dir_mode method causes Berkeley DB to create any
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intermediate directories needed during recovery, using the specified
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permissions.</p>
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<p>On UNIX systems or in IEEE/ANSI Std 1003.1 (POSIX) environments, created directories
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are owned by the process owner; the group ownership of created
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directories is based on the system and directory defaults, and is not
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further specified by Berkeley DB.</p>
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<p>The database environment's intermediate directory permissions may also be configured using the
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environment's <a href="../ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file. The syntax of the entry in that
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file is a single line with the string "set_intermediate_dir_mode", one or more whitespace
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characters, and the directory permissions.
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Because the <a href="../ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file is read when the database environment
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is opened, it will silently overrule configuration done before that
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time.</p>
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<p>The DB_ENV->set_intermediate_dir_mode method configures operations performed using the specified
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<a href="../api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying
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database environment.</p>
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<p>The DB_ENV->set_intermediate_dir_mode method may not be called after the <a href="../api_c/env_open.html">DB_ENV->open</a> method is
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called.
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</p>
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<p>The DB_ENV->set_intermediate_dir_mode method
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returns a non-zero error value on failure
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and 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>mode</b><ul compact><li>The <b>mode</b> parameter specifies the directory permissions.
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<p>Directory permissions are interpreted as a string of nine characters,
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using the character set <b>r</b> (read), <b>w</b> (write), <b>x</b>
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(execute or search), and <b>-</b> (none). The first character is the
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read permissions for the directory owner (set to either <b>r</b> or
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<b>-</b>). The second character is the write permissions for the
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directory owner (set to either <b>w</b> or <b>-</b>). The third
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character is the execute permissions for the directory owner (set to
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either <b>x</b> or <b>-</b>).</p>
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<p>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 <b>rwx------</b> would
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configure read, write and execute/search access for the owner only. The
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string <b>rwxrwx---</b> would configure read, write and execute/search
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access for both the owner and the group. The string <b>rwxr-----</b>
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would configure read, write and execute/search access for the directory
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owner and read-only access for the directory group.</p></ul>
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<br>
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<br><b>Errors</b>
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<p>The DB_ENV->set_intermediate_dir_mode method
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may fail and return one of the following non-zero errors:</p>
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<br>
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<b>EINVAL</b><ul compact><li>If the method was called after <a href="../api_c/env_open.html">DB_ENV->open</a> was called; or if an
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invalid flag value or parameter was specified.</ul>
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<br>
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<hr size=1 noshade>
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<b>Description: DB_ENV->get_intermediate_dir_mode</b>
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<p>The DB_ENV->get_intermediate_dir_mode method returns the intermediate directory permissions.</p>
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<p>The DB_ENV->get_intermediate_dir_mode method may be called at any time during the life of the
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application.</p>
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<p>The DB_ENV->get_intermediate_dir_mode method
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returns a non-zero error value on failure
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and 0 on success.
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</p>
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<b>Parameters</b> <br>
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<b>modep</b><ul compact><li>The DB_ENV->get_intermediate_dir_mode method returns a reference to the
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intermediate directory permissions in <b>modep</b>.</ul>
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<br>
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<hr size=1 noshade>
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<br><b>Class</b>
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<a href="../api_c/env_class.html">DB_ENV</a>
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<br><b>See Also</b>
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<a href="../api_c/env_list.html">Database Environments and Related Methods</a>
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</tt>
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<table width="100%"><tr><td><br></td><td align=right>
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</td></tr></table>
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<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
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