87 lines
3.9 KiB
HTML
87 lines
3.9 KiB
HTML
<!--$Id: env_set_lg_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_lg_filemode</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_lg_filemode</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_lg_filemode(DB_ENV *dbenv, int lg_mode);
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<p>
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int
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DB_ENV->get_lg_filemode(DB_ENV *dbenv, int *lg_modep);
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</pre></b>
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<hr size=1 noshade>
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<b>Description: DB_ENV->set_lg_filemode</b>
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<p>Set the absolute file mode for created log files. This method is
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<b>only</b> useful for the rare Berkeley DB application that does not
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control its umask value.</p>
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<p>Normally, if Berkeley DB applications set their umask appropriately, all
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processes in the application suite will have read permission on the log
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files created by any process in the application suite. However, if the
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Berkeley DB application is a library, a process using the library might set
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its umask to a value preventing other processes in the application suite
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from reading the log files it creates. In this rare case, the
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DB_ENV->set_lg_filemode method can be used to set the mode of created
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log files to an absolute value.</p>
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<p>The database environment's log file mode 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_lg_filemode", one or more whitespace
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characters, and the absolute mode of created log files.
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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_lg_filemode method configures a database environment, not only operations
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performed using the specified <a href="../api_c/env_class.html">DB_ENV</a> handle.</p>
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<p>The DB_ENV->set_lg_filemode 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->set_lg_filemode 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>lg_filemode</b><ul compact><li>The <b>lg_filemode</b> parameter is the absolute mode of the created
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log file.</ul>
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<br>
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<hr size=1 noshade>
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<b>Description: DB_ENV->set_lg_filemode</b>
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<p>The DB_ENV->set_lg_filemode method returns the log file mode.</p>
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<p>The DB_ENV->set_lg_filemode 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->set_lg_filemode 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>lg_modep</b><ul compact><li>The DB_ENV->set_lg_filemode method returns the
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log file mode in <b>lg_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>, <a href="../api_c/logc_class.html">DB_LOGC</a>, <a href="../api_c/lsn_class.html">DB_LSN</a>
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<br><b>See Also</b>
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<a href="../api_c/log_list.html">Logging Subsystem 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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<a href="../api_c/api_core.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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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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</body>
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</html>
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