const DB_LSN *lsn, char *namep, size_t len);
The DB_ENV->log_file method maps
copying the name of the file containing the record named by lsn
into the memory location to which namep refers.
The len argument is the length of the namep buffer in bytes.
If namep is too short to hold the filename, DB_ENV->log_file will
(Log filenames are normally quite short, on the order of 10 characters.)
This mapping of
to files is needed for database administration. For example, a
transaction manager typically records the earliest
needed for restart, and the database administrator may want to archive
log files to tape when they contain only
entries before the earliest one needed for restart.
The DB_ENV->log_file method returns a non-zero error value on failure and 0 on success.
The DB_ENV->log_file method may fail and return a non-zero error for the following conditions:
- The supplied buffer was too small to hold the log filename.
The DB_ENV->log_file method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB_ENV->log_file method may fail and
in which case all subsequent Berkeley DB calls will fail in the same way.
DB_ENV, DB_LOGC, DB_LSN
Logging Subsystem and Related Methods
Copyright Sleepycat Software