Set the absolute file mode for created log files. This method is
<spanclass="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 <codeclass="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 <ahref="../../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 <ahref="../../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 <codeclass="methodname">DbEnv::set_lg_filemode()</code> method configures a database
environment, not only operations performed using the specified
<aclass="link"href="env.html"title="Chapter5. The DbEnv Handle">DbEnv</a> handle.
</p>
<p>
The <codeclass="methodname">DbEnv::set_lg_filemode()</code> method may be called at any time during
the life of the application.
</p>
<p>
The <codeclass="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
