int DbLog::archive(char **list, u_int32_t flags, void *(*db_malloc)(size_t));
The DbLog::archive method creates a NULL-terminated array of log or database file names and copies a pointer to them into the user-specified memory location list.
By default, DbLog::archive returns the names of all of the log files that are no longer in use (e.g., no longer involved in active transactions), and that may safely be archived for catastrophic recovery and then removed from the system. If there were no file names to return, list will be set to NULL.
Arrays of log file names are created in allocated memory. If db_malloc is non-NULL, it is called to allocate the memory, otherwise, the library function malloc(3)) is used. The function db_malloc must match the calling conventions of the malloc(3)) library routine. Regardless, the caller is responsible for deallocating the returned memory. To deallocate the returned memory, free each returned memory pointer; pointers inside the memory do not need to be individually freed.
The flags argument is specified by logically OR'ing together one or more of the following values:
The DB_ARCH_DATA and DB_ARCH_LOG flags are mutually exclusive.
See the db_archive manual page for more information on database archival procedures.
The DbLog::archive method is the underlying method used by the db_archive utility. See the db_archive utility source code for an example of using DbLog::archive in a POSIX 1003.1 environment.
The DbLog::archive method either returns errno or throws an exception that encapsulates an errno on failure, and 0 on success.
The DbLog::archive method may fail and throw an exception for any of the errors specified for the following Berkeley DB and C library functions: close(3), fcntl(3), fflush(3), fprintf(3), free(3), getcwd(3), getenv(3), getpid(3), getuid(3), isdigit(3), DbLog::compare, DbLog::get, malloc(3), memcpy(3), memset(3), open(3), qsort(3), realloc(3), sigfillset(3), sigprocmask(3), snprintf(3), stat(3), strchr(3), strcmp(3), strerror(3), strlen(3), unlink(3), vfprintf(3), and vsnprintf(3).
In addition, the DbLog::archive method may fail and throw an exception or return errno for the following conditions:
The log was corrupted.