Function EXT_file

src/jrd/ext.cpp:238–314

Third param is unused.

// Third param is unused.
ExternalFile* EXT_file(jrd_rel* relation, const TEXT* file_name) //, bid* description)
{
/**************************************
 *
 *	E X T _ f i l e
 *
 **************************************
 *
 * Functional description
 *	Create a file block for external file access.
 *
 **************************************/
	Database* dbb = GET_DBB();
	CHECK_DBB(dbb);

	// if we already have a external file associated with this relation just
	// return the file structure
	if (relation->rel_file) {
		EXT_fini(relation, false);
	}

#ifdef WIN_NT
	// Default number of file handles stdio.h on Windows is 512, use this
	// call to increase and set to the maximum
	_setmaxstdio(2048);
#endif

	// If file_name is relative expand it in ExternalFilesPath.
	PathName newName, name(file_name);
	if (PathUtils::isRelative(name))
	{
		ExternalFileDirectoryList::create(dbb);
		if (!(dbb->dbb_external_file_directory_list->expandFileName(newName, name)))
		{
			if (!dbb->dbb_external_file_directory_list->defaultName(newName, name))
			{
				ISC_expand_filename(newName, false);
			}
		}
		file_name = newName.c_str();
		name = newName;
	}

	// Create missing path components
	ObjectsArray<PathName> paths;

	for (;;)
	{
		PathName path, file;
		PathUtils::splitLastComponent(path, file, name);
		if (path.isEmpty())
			break;

		int rc = PathUtils::makeDir(path.c_str());
		if (rc == 0 || rc == EEXIST)
			break;
		paths.push(path);
		name = path;