DB_ENV->log_get_config()
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DB_ENV->log_get_config()

#include <db.h>

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

The DB_ENV->log_get_config() method returns whether the specified which parameter is currently set or not. You can manage this value using the DB_ENV->log_set_config() method.

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

The DB_ENV->log_get_config() 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. Must be set to one of the following values:

  • DB_LOG_DIRECT

    System buffering is turned off for Berkeley DB log files to avoid double caching.

  • DB_LOG_DSYNC

    Berkeley DB is configured to flush log writes to the backing disk before returning from the write system call, rather than flushing log writes explicitly in a separate system call, as necessary.

  • DB_LOG_AUTO_REMOVE

    Berkeley DB automatically removes log files that are no longer needed.

  • DB_LOG_IN_MEMORY

    Transaction logs are maintained in memory rather than on disk. This means that transactions exhibit the ACI (atomicity, consistency, and isolation) properties, but not D (durability).

  • DB_LOG_ZERO

    All pages of a log file are zeroed when that log file is created.

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

Logging Subsystem and Related Methods, DB_ENV->log_set_config()

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