#include <db.h>
int
DB_ENV->rep_set_view(DB_ENV *env,
    int (*partial_func)(DB_ENV *dbenv,
    const char *name, int *result, u_int32_t flags));  
      
        The DB_ENV->rep_set_view() method specifies
        that this environment is a replication view.  A replication view is
        a special type of client that can contain a full or partial copy of
        the replicated data.  A partial view uses a callback to determine
        the subset of database files to replicate.  A replication view does
        not vote in elections, cannot become master, and cannot contribute
        to transactional durability.
    
         The DB_ENV->rep_set_view() method
         configures operations performed using the specified 
         DB_ENV  handle, not all operations
         performed on the underlying database environment.
    
         The DB_ENV->rep_set_view() method must be
         called prior to opening the environment.  Also the method must be
         called every time the environment is used after that point.  Once
         an environment is configured as a view, it stays that way for the
         lifetime of the environment.
    
         The DB_ENV->rep_set_view() 
            
                  method returns a non-zero error value on failure and 0 on success.
            
            
        
    
Berkeley DB is not re-entrant. The callback function for this method should not attempt to make library calls (for example, to release locks or close open handles). Re-entering Berkeley DB is not guaranteed to work correctly, and the results are undefined.
The partial_func callback function determines whether a particular database file should be replicated to the local site. If a NULL callback is specified, all database files will be replicated. The parameters to partial_func are as follows:
                        dbenv
                     
The dbenv parameter is the enclosing database environment handle.
                        name
                     
The name parameter is the physical on-disk file name of the database. In-memory databases are always replicated and do not invoke this callback.
                        result
                     
The result parameter is an output parameter indicating whether the file should be replicated. Set it to 0 to reject this file or to a non-zero value to accept this file.
                        flags
                     
The flags parameter is currently unused.
The partial function must return 0 on success and non-zero on failure. If the partial function fails, the environment will panic.
                 The DB_ENV->rep_set_view()
                 
            
                 method may fail and return one of the following non-zero errors: