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Berkeley DB: DB_ENV->set_data_dir
DB_ENV->set_data_dir
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#include <db.h>
int
DB_ENV->set_data_dir(DB_ENV *dbenv, const char *dir);
int
DB_ENV->get_data_dirs(DB_ENV *dbenv, const char ***dirpp);
Description: DB_ENV->set_data_dir
Set the path of a directory to be used as the location of the access
method database files. Paths specified to the DB->open function
will be searched relative to this path. Paths set using this method
are additive, and specifying more than one will result in each specified
directory being searched for database files. If any directories are
specified, created database files will always be created in the first
path specified.
If no database directories are specified, database files must be named
either by absolute paths or relative to the environment home directory.
See Berkeley DB File Naming for more
information.
The database environment's data directories may also be set using the environment's
DB_CONFIG file. The syntax of the entry in that file is a
single line with the string "set_data_dir", one or more whitespace characters,
and the directory name.
The DB_ENV->set_data_dir method configures operations performed using the specified
DB_ENV handle, not all operations performed on the underlying
database environment.
The DB_ENV->set_data_dir method may not be called after the DB_ENV->open method is
called.
If the database environment already exists when
DB_ENV->open is called, the information specified to DB_ENV->set_data_dir
must be consistent with the existing environment or corruption can
occur.
The DB_ENV->set_data_dir method
returns a non-zero error value on failure
and 0 on success.
Parameters
- dir
- The dir parameter is a directory to be used as a location for
database files.
On Windows, the dir argument will be interpreted as a UTF-8
string, which is equivalent to ASCII for Latin characters.
Errors
The DB_ENV->set_data_dir method
may fail and return one of the following non-zero errors:
- EINVAL
- If the method was called after DB_ENV->open was called; or if an
invalid flag value or parameter was specified.
Description: DB_ENV->get_data_dirs
The DB_ENV->get_data_dirs method returns the NULL-terminated array of directories.
The DB_ENV->get_data_dirs method may be called at any time during the life of the
application.
The DB_ENV->get_data_dirs method
returns a non-zero error value on failure
and 0 on success.
Parameters
- dirpp
- The DB_ENV->get_data_dirs method returns a reference to the
NULL-terminated array of directories in dirpp.
Class
DB_ENV
See Also
Database Environments and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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