Function PAG_add_file

src/jrd/pag.cpp:223–335

USHORT PAG_add_file(thread_db* tdbb, const TEXT* file_name, SLONG start)
{
/**************************************
 *
 *	P A G _ a d d _ f i l e
 *
 **************************************
 *
 * Functional description
 *	Add a file to the current database.  Return the sequence number for the new file.
 *
 **************************************/
	SET_TDBB(tdbb);
	Database* dbb = tdbb->getDatabase();
	CHECK_DBB(dbb);

	err_post_if_database_is_readonly(dbb);

	// Find current last file

	PageSpace* pageSpace = dbb->dbb_page_manager.findPageSpace(DB_PAGE_SPACE);
	jrd_file* file = pageSpace->file;
	while (file->fil_next) {
		file = file->fil_next;
	}

	// Verify database file path against DatabaseAccess entry of firebird.conf
	if (!JRD_verify_database_access(file_name))
	{
		string fileName(file_name);
		ISC_systemToUtf8(fileName);
		ERR_post(Arg::Gds(isc_conf_access_denied) << Arg::Str("additional database file") <<
													 Arg::Str(fileName));
	}

	// Create the file.  If the sequence number comes back zero, it didn't work, so punt

	const USHORT sequence = PIO_add_file(tdbb, pageSpace->file, file_name, start);
	if (!sequence)
		return 0;

	// Create header page for new file

	jrd_file* next = file->fil_next;

	if (dbb->dbb_flags & (DBB_force_write | DBB_no_fs_cache))
	{
		PIO_force_write(next, dbb->dbb_flags & DBB_force_write, dbb->dbb_flags & DBB_no_fs_cache);
	}

	WIN window(DB_PAGE_SPACE, next->fil_min_page);
	header_page* header = (header_page*) CCH_fake(tdbb, &window, 1);
	header->hdr_header.pag_type = pag_header;
	header->hdr_sequence = sequence;
	header->hdr_page_size = dbb->dbb_page_size;
	header->hdr_data[0] = HDR_end;
	header->hdr_end = HDR_SIZE;
	next->fil_sequence = sequence;