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Berkeley DB: DB->fd
DB->fd
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#include <db.h>
int
DB->fd(DB *db, int *fdp);
Description: DB->fd
The DB->fd method provides access to a file descriptor representative
of the underlying database. A file descriptor referring to the same
file will be returned to all processes that call DB->open with
the same file parameter.
This file descriptor may be safely used as a parameter to the
fcntl(2) and flock(2) locking functions. The file
descriptor is not necessarily associated with any of the underlying
files actually used by the access method.
The DB->fd method only supports a coarse-grained form of locking.
Applications should instead use the Berkeley DB lock manager where possible.
The DB->fd method
returns a non-zero error value on failure
and 0 on success.
Parameters
- fdp
- The fdp parameter references memory into which
the current file descriptor is copied.
Class
DB
See Also
Databases and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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