Berkeley DB

log_file

						#include <db.h>
						int
						log_file(DB_ENV *env,
						const DB_LSN *lsn, char *namep, size_t len);
					

Description

The log_file function maps DB_LSN structures to file names, copying the name of the file containing the record named by lsn into the memory location referenced by namep.

The len argument is the length of the namep buffer in bytes. If namep is too short to hold the file name, log_file will return ENOMEM. (Log file names are normally quite short, on the order of 10 characters.)

This mapping of DB_LSN structures to files is needed for database administration. For example, a transaction manager typically records the earliest DB_LSN needed for restart, and the database administrator may want to archive log files to tape when they contain ...