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DB_ENV-&gt;set_lg_dir
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#include &lt;db.h&gt;

int
DB_ENV-&gt;set_lg_dir(DB_ENV *dbenv, const char *dir);

int
DB_ENV-&gt;get_lg_dir(DB_ENV *dbenv, const char **dirp);
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Description: DB_ENV-&gt;set_lg_dir
The path of a directory to be used as the location of logging files.
Log files created by the Log Manager subsystem will be created in this
directory.
If no logging directory is specified, log files are created in the
environment home directory. See <a href="../../db4-devel-4.7.25/ref/env/naming.html">Berkeley DB File Naming</a> for more information.
For the greatest degree of recoverability from system or application
failure, database files and log files should be located on separate
physical devices.
The database environment's logging directory may also be configured using the
environment's <a href="../../db4-devel-4.7.25/ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file. The syntax of the entry in that
file is a single line with the string "set_lg_dir", one or more whitespace
characters, and the directory name.
Because the <a href="../../db4-devel-4.7.25/ref/env/db_config.html#DB_CONFIG">DB_CONFIG</a> file is read when the database environment
is opened, it will silently overrule configuration done before that
time.
The DB_ENV-&gt;set_lg_dir method configures operations performed using the specified
<a href="../../db4-devel-4.7.25/api_c/env_class.html">DB_ENV</a> handle, not all operations performed on the underlying
database environment.
The DB_ENV-&gt;set_lg_dir method may not be called after the <a href="../../db4-devel-4.7.25/api_c/env_open.html">DB_ENV-&gt;open</a> method is
called.
If the database environment already exists when
<a href="../../db4-devel-4.7.25/api_c/env_open.html">DB_ENV-&gt;open</a> is called, the information specified to DB_ENV-&gt;set_lg_dir
must be consistent with the existing environment or corruption can
occur.
The DB_ENV-&gt;set_lg_dir method
returns a non-zero error value on failure
and 0 on success.

Parameters 
 dir<ul compact><li>The dir parameter is the directory used to store the logging files.</ul>
When using a Unicode build on Windows (the default), the dir
argument will be interpreted as a UTF-8 string, which is equivalent to
ASCII for Latin characters.
 
 Errors
The DB_ENV-&gt;set_lg_dir method
may fail and return one of the following non-zero errors:
 
EINVAL<ul compact><li>If the method was called after <a href="../../db4-devel-4.7.25/api_c/env_open.html">DB_ENV-&gt;open</a> was called; or if an
invalid flag value or parameter was specified.</ul>
 
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Description: DB_ENV-&gt;get_lg_dir
The DB_ENV-&gt;get_lg_dir method returns the log directory.
The DB_ENV-&gt;get_lg_dir method may be called at any time during the life of the
application.
The DB_ENV-&gt;get_lg_dir method
returns a non-zero error value on failure
and 0 on success.

Parameters 
 dirp<ul compact><li>The DB_ENV-&gt;get_lg_dir method returns a reference to the
log directory in dirp.</ul>
 
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 Class
<a href="../../db4-devel-4.7.25/api_c/env_class.html">DB_ENV</a>, <a href="../../db4-devel-4.7.25/api_c/logc_class.html">DB_LOGC</a>, <a href="../../db4-devel-4.7.25/api_c/lsn_class.html">DB_LSN</a>
 See Also
<a href="../../db4-devel-4.7.25/api_c/log_list.html">Logging Subsystem and Related Methods</a>
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