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Berkeley DB: db_env_set_func_exists
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db_env_set_func_exists
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#include <db.h>
int
db_env_set_func_exists(int (*func_exists)(const char *path, int *isdirp));
Description: db_env_set_func_exists
The Berkeley DB library requires the ability to determine whether a file
exists and whether it is a file of type directory.
The db_env_set_func_exists method configures all operations performed by a process and
all of its threads of control, not operations confined to a single
database environment.
Although the db_env_set_func_exists method may be called at any time during the life of
the application, it should normally be called before making calls to the
db_env_create or db_create methods.
The db_env_set_func_exists method
returns a non-zero error value on failure
and 0 on success.
Parameters
func_exists- The func_exists parameter is the function which returns if a
file exists and if it is a file of type directory.
The path parameter to this function is the pathname of the file
to be checked.
If the isdirp parameter is non-NULL, it must be set to non-0 if
path is a directory, and 0 if path is not a directory.
The func_exists function must return the value of errno on
failure and 0 on success.
See Also
Run-time configuration
Copyright (c) 1996,2008 Oracle. All rights reserved.