### DB_ENV->set_verbose

`

###

    #include <db.h>

    int
    DB_ENV->set_verbose(DB_ENV *dbenv, u_int32_t which, int onoff);

    int
    DB_ENV->get_verbose(DB_ENV *dbenv, u_int32_t which, int *onoffp);

### Description: DB_ENV->set_verbose

The DB_ENV->set_verbose method turns specific additional informational and debugging messages in the Berkeley DB message output on and off. To see the additional messages, verbose messages must also be configured for the application. For more information on verbose messages, see the DB_ENV->set_msgfile method.

The database environment's messages may also be configured using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_verbose", one or more whitespace characters, and the method which parameter as a string; for example, "set_verbose DB_VERB_RECOVERY". Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

The DB_ENV->set_verbose method configures operations performed using the specified DB_ENV handle, not all operations performed on the underlying database environment.

The DB_ENV->set_verbose method may be called at any time during the life of the application.

The DB_ENV->set_verbose method returns a non-zero error value on failure and 0 on success.

### Parameters

onoff
  If the onoff parameter is set to non-zero, the additional messages are output.
which
  The which parameter must be set to one of the following values:
  DB_VERB_DEADLOCK
    Display additional information when doing deadlock detection.
  DB_VERB_FILEOPS
    Display additional information when performing filesystem operations such as open, close or rename. May not be available on all platforms.
  DB_VERB_FILEOPS_ALL
    Display additional information when performing all filesystem operations, including read and write. May not be available on all platforms.
  DB_VERB_RECOVERY
    Display additional information when performing recovery.
  DB_VERB_REGISTER
    Display additional information concerning support for the DB_REGISTER flag to the DB_ENV->open method.
  DB_VERB_REPLICATION
    Display detailed information when processing replication messages.
  DB_VERB_WAITSFOR
    Display the waits-for table when doing deadlock detection.

### Errors

The DB_ENV->set_verbose method may fail and return one of the following non-zero errors:

EINVAL
  An invalid flag value or parameter was specified.

### Description: DB_ENV->get_verbose

The DB_ENV->get_verbose method returns whether the specified which parameter is currently set or not.

The DB_ENV->get_verbose method may be called at any time during the life of the application.

The DB_ENV->get_verbose method returns a non-zero error value on failure and 0 on success.

### Parameters

which
  The which parameter is the message value for which configuration is being checked.
onoffp
  The onoffp parameter references memory into which the configuration of the specified which parameter is copied. If the returned onoff value is zero, the parameter is off; otherwise on.

### Class

DB_ENV

### See Also

Database Environments and Related Methods`

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