#include <db.h>
int
DB_ENV->dbbackup(DB_ENV *dbenv, const char *dbfile, const char *target, 
                 u_int32_t flags); 
      
        The DB_ENV->dbbackup() method performs a hot
        backup of a single database file contained within the environment.
    
To back up an entire environment, use the DB_ENV->backup() method.
This method's default behavior can be changed by setting backup callbacks. See DB_ENV->set_backup_callbacks() for more information. Additional tuning parameters can also be set using the DB_ENV->set_backup_config() method.
         The DB_ENV->dbbackup() method may only be
         called after the environment handle has been opened.
    
         The DB_ENV->dbbackup() 
            
                  method returns a non-zero error value on failure and 0 on success.
            
            
        
    
                 Identifies the directory in which the back up will be
                 placed.  This target must exist; otherwise this method
                 exits with an ENOENT error return.
             
                 Note that if the backup callbacks are set, then the value
                 specified to this parameter is passed on to the
                 open_func() callback.  If this
                 parameter is NULL, then the target must be specified
                 directly to the open_func() callback.
             
             The DB_ENV->dbbackup() 
            
                 method may fail and return one of the following non-zero errors:
            
            
        
        
                DB_EXCL was specified for the
                flags parameter, and an existing target
                file was discovered when attempting to back up a source
                file.