DOC HOME SITE MAP MAN PAGES GNU INFO SEARCH PRINT BOOK
 

DB_ENV->log_printf

API Ref

#include <db.h>

int DB_ENV->log_printf(DB_ENV *env, DB_TXN *txnid, const char *fmt, ...);


Description: DB_ENV->log_printf

The DB_ENV->log_printf method appends an informational message to the Berkeley DB database environment log files.

The DB_ENV->log_printf method allows applications to include information in the database environment log files, for later review using the db_printlog utility. This method is intended for debugging and performance tuning.

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

Parameters

txnid
If the logged message refers to an application-specified transaction, the txnid parameter is a transaction handle returned from DB_ENV->txn_begin; otherwise NULL.
fmt
A format string that specifies how subsequent arguments (or arguments accessed via the variable-length argument facilities of stdarg(3)) are converted for output. The format string may contain any formatting directives supported by the underlying C library vsnprintf(3) function.

Errors

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

EINVAL
An invalid flag value or parameter was specified.

Class

DB_ENV, DB_LOGC, DB_LSN

See Also

Logging Subsystem and Related Methods

APIRef

Copyright (c) 1996-2005 Sleepycat Software, Inc. - All rights reserved.