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Annotation of 43BSDTahoe/new/xns/courierlib/Filing6.cr, revision 1.1

1.1     ! root        1: -- $Header: Filing6.cr,v 2.6 87/03/23 13:06:48 ed Exp $
        !             2: 
        !             3: -- Note:  this is a TEST version of Filing, and is not guaranteed to
        !             4: -- match the official Xerox version at all.  It does seem to be adequate
        !             5: -- for FTP, however.
        !             6: 
        !             7: -- $Log:       Filing6.cr,v $
        !             8: -- Revision 2.6  87/03/23  13:06:48  ed
        !             9: -- Minor Typo in SerializedTree.
        !            10: -- 
        !            11: -- Revision 2.5  87/03/23  11:49:18  ed
        !            12: -- Slight mod to SerializedTree to allow current implementation.
        !            13: -- 
        !            14: -- Revision 2.4  87/01/12  16:45:24  ed
        !            15: -- Created Filing version 6 from Filing version 4
        !            16: --
        !            17: -- Revision 2.2  86/06/30  11:31:13  jqj
        !            18: -- convert to Authentication v 2 for compatibility with spec., now that
        !            19: -- compiler allows it.
        !            20: -- 
        !            21: -- Revision 2.1  86/06/02  07:08:22  jqj
        !            22: -- typos
        !            23: -- 
        !            24: -- Revision 2.0  85/11/21  07:22:38  jqj
        !            25: -- 4.3BSD standard release
        !            26: -- 
        !            27: -- Revision 1.1  85/05/27  06:30:46  jqj
        !            28: -- Initial revision
        !            29: -- 
        !            30: -- Revision 1.1  85/05/27  06:30:46  jqj
        !            31: -- Initial revision
        !            32: -- 
        !            33: 
        !            34: Filing: PROGRAM 10 VERSION 6 =
        !            35: BEGIN
        !            36:        DEPENDS UPON
        !            37:                BulkData(0) VERSION 1,
        !            38:                Clearinghouse(2) VERSION 3,
        !            39:                Authentication(14) VERSION 3,
        !            40:                Time(15) VERSION 2;
        !            41: 
        !            42: 
        !            43: 
        !            44: 
        !            45: -- TYPES AND CONSTANTS --
        !            46: 
        !            47: -- Attributes (individual attributes defined later) --
        !            48: 
        !            49: AttributeType: TYPE = LONG CARDINAL;
        !            50: AttributeTypeSequence: TYPE = SEQUENCE OF AttributeType;
        !            51: allAttributeTypes: AttributeTypeSequence = [37777777777B];
        !            52: Attribute: TYPE = RECORD [type: AttributeType, value: SEQUENCE OF UNSPECIFIED];
        !            53: AttributeSequence: TYPE = SEQUENCE OF Attribute;
        !            54: 
        !            55: -- Controls --
        !            56: 
        !            57: ControlType: TYPE = {lockControl(0), timeoutControl(1), accessControl(2)};
        !            58: ControlTypeSequence: TYPE = SEQUENCE 3 OF ControlType;
        !            59: 
        !            60: Lock: TYPE = {lockNone(0), share(1), exclusive(2)};
        !            61: 
        !            62: Timeout: TYPE = CARDINAL;      -- in seconds --
        !            63: defaultTimeout: Timeout = 177777B;     -- actual value impl.-dependent --
        !            64: 
        !            65: AccessType: TYPE = {
        !            66:        readAccess(0), writeAccess(1), ownerAccess(2),  -- all files --
        !            67:        addAccess(3), removeAccess(4) };                -- directories only --
        !            68: AccessSequence: TYPE = SEQUENCE 5 OF AccessType;
        !            69: -- fullAccess: AccessSequence = [177777B]; --
        !            70: 
        !            71: Control: TYPE = CHOICE ControlType OF {
        !            72:        lockControl => Lock,
        !            73:        timeoutControl => Timeout,
        !            74:        accessControl => AccessSequence};
        !            75: ControlSequence: TYPE = SEQUENCE 3 OF Control;
        !            76: 
        !            77: -- Scopes --
        !            78: 
        !            79: Count: TYPE = CARDINAL;
        !            80: unlimitedCount: Count = 177777B;
        !            81: 
        !            82: Depth: TYPE = CARDINAL;
        !            83: allDescendants: Depth = 177777B;
        !            84: 
        !            85: Direction: TYPE = {forward(0), backward(1)};
        !            86: 
        !            87: Interpretation: TYPE = { interpretationNone(0), boolean(1), cardinal(2),
        !            88:        longCardinal(3), time(4), integer(5), longInteger(6), string(7) };
        !            89: FilterType: TYPE = {
        !            90:        -- relations --
        !            91:        less(0), lessOrEqual(1), equal(2), notEqual(3), greaterOrEqual(4),
        !            92:        greater(5), 
        !            93:        -- logical --
        !            94:        and(6), or(7), not(8),
        !            95:        -- constants --
        !            96:        filterNone(9), all(10),
        !            97:        -- patterns --
        !            98:        matches(11) };
        !            99: RestrictedFilter: TYPE = CHOICE FilterType OF {
        !           100:        less, lessOrEqual, equal, notEqual, greaterOrEqual, greater =>
        !           101:                RECORD [attribute: Attribute, interpretation: Interpretation],
        !           102:                -- interpretation ignored if attribute interpreted by
        !           103:                -- implementor
        !           104:        -- NOT IMPLEMENTED: and, or, not --
        !           105:        filterNone, all => RECORD [],
        !           106:        matches => RECORD [attribute: Attribute] };
        !           107: Filter: TYPE = CHOICE FilterType OF {
        !           108:        less, lessOrEqual, equal, notEqual, greaterOrEqual, greater =>
        !           109:                RECORD [attribute: Attribute, interpretation: Interpretation],
        !           110:                -- interpretation ignored if attribute interpreted by
        !           111:                -- implementor
        !           112:        -- NOT YET IMPLEMENTED: (at least, not generally) and, or, not --
        !           113:        and, or => SEQUENCE OF RestrictedFilter,
        !           114:        not => RestrictedFilter,
        !           115:        filterNone, all => RECORD [],
        !           116:        matches => RECORD [attribute: Attribute] };
        !           117: nullFilter: Filter = all[];
        !           118:        
        !           119: ScopeType: TYPE = { count(0), direction(1), filter(2), depth(3) };
        !           120: Scope: TYPE = CHOICE ScopeType OF {
        !           121:        count => Count,
        !           122:        depth => Depth,
        !           123:        direction => Direction,
        !           124:        filter => Filter };
        !           125: ScopeSequence: TYPE = SEQUENCE 4 OF Scope;
        !           126: 
        !           127: -- Handles and Authentication --
        !           128: 
        !           129: PrimaryCredentials: TYPE = Authentication.Credentials;
        !           130: -- nullPrimaryCredentials: PrimaryCredentials = Authentication.nullCredentials;
        !           131: 
        !           132: -- Secondary credentials --
        !           133: 
        !           134: SecondaryItemType: TYPE = LONG CARDINAL;
        !           135: SecondaryType: TYPE = SEQUENCE 10 OF SecondaryItemType;
        !           136: 
        !           137: SecondaryItem: TYPE = RECORD [
        !           138:        type: SecondaryItemType,
        !           139:        value: SEQUENCE OF UNSPECIFIED ];
        !           140: 
        !           141: Secondary: TYPE = SEQUENCE 10 OF SecondaryItem;
        !           142: 
        !           143: systemPassword: SecondaryItemType = 1;
        !           144: SystemPassword : TYPE = STRING;                        -- value is private --
        !           145: 
        !           146: userName: SecondaryItemType = 2;
        !           147: UserName: TYPE = STRING;                       -- value is not private --
        !           148: 
        !           149: userPassword: SecondaryItemType = 3;
        !           150: UserPassword: TYPE = STRING;                   -- value is private --
        !           151: 
        !           152: userPassword2: SecondaryItemType = 4;
        !           153: UserPassword2: TYPE = STRING;                  -- value is private --
        !           154: 
        !           155: userServiceName: SecondaryItemType = 5;
        !           156: UserServiceName: TYPE = STRING;                        -- value is not private --
        !           157: 
        !           158: userServicePassword: SecondaryItemType = 6;
        !           159: UserServicePassword: TYPE = STRING;            -- value is private --
        !           160: 
        !           161: userServicePassword2: SecondaryItemType = 7;
        !           162: UserServicePassword2: TYPE = STRING;           -- value is private --
        !           163: 
        !           164: accountName: SecondaryItemType = 8;
        !           165: AccountName: TYPE = STRING;                    -- value is not private --
        !           166: 
        !           167: accountPassword: SecondaryItemType = 9;
        !           168: AccountPassword: TYPE = STRING;                        -- value is private --
        !           169: 
        !           170: accountPassword2: SecondaryItemType = 10;
        !           171: AccountPassword2: TYPE = STRING;               -- value is private --
        !           172: 
        !           173: secondaryString: SecondaryItemType = 1000;
        !           174: SecondaryString: TYPE = STRING;                        -- value is not private --
        !           175: 
        !           176: privateSecondaryString: SecondaryItemType = 1001;
        !           177: PrivateSecondaryString: TYPE = STRING;         -- value is not private --
        !           178: 
        !           179: EncryptedSecondary: TYPE = SEQUENCE OF Authentication.Block;
        !           180: 
        !           181: Strength: TYPE = { strengthNone(0), simple(1), strong(2) };
        !           182: SecondaryCredentials: TYPE = CHOICE Strength OF {
        !           183:        strengthNone => RECORD [],
        !           184:        simple => Secondary,
        !           185:        strong => EncryptedSecondary };
        !           186: 
        !           187: Credentials: TYPE = RECORD [
        !           188:        primary: PrimaryCredentials,
        !           189:        secondary: SecondaryCredentials ];
        !           190: 
        !           191: Verifier: TYPE = Authentication.Verifier;
        !           192: 
        !           193: Handle: TYPE = ARRAY 2 OF UNSPECIFIED;
        !           194: nullHandle: Handle = [0,0];
        !           195: 
        !           196: Session: TYPE = RECORD [token: ARRAY 2 OF UNSPECIFIED, verifier: Verifier ];
        !           197: 
        !           198: -- Random Access --
        !           199: 
        !           200: ByteAddress: TYPE = LONG CARDINAL;
        !           201: ByteCount: TYPE = LONG CARDINAL;
        !           202: endOfFile: LONG CARDINAL = 3777777777B; -- logical end of file --
        !           203: 
        !           204: ByteRange: TYPE = RECORD [ firstByte: ByteAddress, count: ByteCount ];
        !           205: 
        !           206: 
        !           207: 
        !           208: 
        !           209: 
        !           210: -- REMOTE ERRORS --
        !           211: 
        !           212: ArgumentProblem: TYPE = {
        !           213:        illegal(0),
        !           214:        disallowed(1),
        !           215:        unreasonable(2),
        !           216:        unimplemented(3),
        !           217:        duplicated(4),
        !           218:        missing(5) };
        !           219: 
        !           220: -- problem with an attribute type or value --
        !           221: AttributeTypeError: ERROR [ problem: ArgumentProblem, type: AttributeType]
        !           222:        = 0;
        !           223: AttributeValueError: ERROR [ problem: ArgumentProblem, type: AttributeType]
        !           224:        = 1;
        !           225: 
        !           226: -- problem with an control type or value --
        !           227: ControlTypeError: ERROR [ problem: ArgumentProblem, type: ControlType]
        !           228:        = 2;
        !           229: ControlValueError: ERROR [ problem: ArgumentProblem, type: ControlType]
        !           230:        = 3;
        !           231: 
        !           232: -- problem with an scope type or value --
        !           233: ScopeTypeError: ERROR [ problem: ArgumentProblem, type: ScopeType]
        !           234:        = 4;
        !           235: ScopeValueError: ERROR [ problem: ArgumentProblem, type: ScopeType]
        !           236:        = 5;
        !           237: 
        !           238: -- problem in obtaining access to a file --
        !           239: AccessProblem: TYPE = {
        !           240:        accessRightsInsufficient(0),
        !           241:        accessRightsIndeterminate(1),
        !           242:        fileChanged(2),
        !           243:        fileDamaged(3),
        !           244:        fileInUse(4),
        !           245:        fileNotFound(5),
        !           246:        fileOpen(6) };
        !           247: AccessError: ERROR [problem: AccessProblem] = 6;
        !           248: 
        !           249: -- problem with a credentials or verifier --
        !           250: AuthenticationProblem: TYPE = {
        !           251:        primaryCredentialsInvalid(0),
        !           252:        verifierInvalid(1),
        !           253:        verifierExpired(2),
        !           254:        verifierReused(3),
        !           255:        primaryCredentialsExpired(4),
        !           256:        inappropriatePrimaryCredentials(5),
        !           257:        secondaryCredentialsRequired(6),
        !           258:        secondaryCredentialsTypeInvalid(7),
        !           259:        secondaryCredentialsValueInvalid(8) };
        !           260: AuthenticationError: ERROR [problem: AuthenticationProblem,
        !           261:                            type: SecondaryType] = 7;
        !           262: 
        !           263: -- problem with a BDT --
        !           264: ConnectionProblem: TYPE = {
        !           265:                -- communication problems --
        !           266:        noRoute(0),
        !           267:        noResponse(1),
        !           268:        transmissionHardware(2),
        !           269:        transportTimeout(3),
        !           270:                -- resource problems --
        !           271:        tooManyLocalConnections(4),
        !           272:        tooManyRemoteConnections(5),
        !           273:                -- remote program implementation problems --
        !           274:        missingCourier(6),
        !           275:        missingProgram(7),
        !           276:        missingProcedure(8),
        !           277:        protocolMismatch(9),
        !           278:        parameterInconsistency(10),
        !           279:        invalidMessage(11),
        !           280:        returnTimedOut(12),
        !           281:                -- miscellaneous --
        !           282:        otherCallProblem(177777B) };
        !           283: ConnectionError: ERROR [problem: ConnectionProblem] = 8;
        !           284: 
        !           285: -- problem with file handle --
        !           286: HandleProblem: TYPE = {
        !           287:        invalid(0),
        !           288:        nullDisallowed(1),
        !           289:        directoryRequired(2) };
        !           290: HandleError: ERROR [problem: HandleProblem] = 9;
        !           291: 
        !           292: -- problem during insertion in directory or changing attributes --
        !           293: InsertionProblem: TYPE = {
        !           294:        positionUnavailable(0),
        !           295:        fileNotUnique(1),
        !           296:        loopInHierarchy(2) };
        !           297: InsertionError: ERROR [problem: InsertionProblem] = 10;
        !           298: 
        !           299: -- problem during random access operation --
        !           300: RangeError: ERROR [problem: ArgumentProblem] = 16;
        !           301: 
        !           302: -- problem during logon or logoff --
        !           303: ServiceProblem: TYPE = {
        !           304:        cannotAuthenticate(0),
        !           305:        serviceFull(1),
        !           306:        serviceUnavailable(2),
        !           307:        sessionInUse(3) };
        !           308: ServiceError: ERROR [problem: ServiceProblem] = 11;
        !           309: 
        !           310: -- problem with a session --
        !           311: SessionProblem: TYPE = {
        !           312:        tokenInvalid(0) };
        !           313: SessionError: ERROR [problem: SessionProblem ] = 12;
        !           314: 
        !           315: -- problem obtaining space for file contents or attributes --
        !           316: SpaceProblem: TYPE = {
        !           317:        allocationExceeded(0),
        !           318:        attributeAreaFull(1),
        !           319:        mediumFull(2) };
        !           320: SpaceError: ERROR [problem: SpaceProblem ] = 13;
        !           321: 
        !           322: -- problem during BDT --
        !           323: TransferProblem: TYPE = {
        !           324:        aborted(0),
        !           325:        checksumIncorrect(1),
        !           326:        formatIncorrect(2),
        !           327:        noRendezvous(3),
        !           328:        wrongDirection(4) };
        !           329: TransferError: ERROR [problem: TransferProblem ] = 14;
        !           330: 
        !           331: -- some undefined (and implementation-dependent) problem occurred --
        !           332: UndefinedProblem: TYPE = CARDINAL;
        !           333: UndefinedError: ERROR [problem: UndefinedProblem ] = 15;
        !           334: 
        !           335: 
        !           336: 
        !           337: 
        !           338: -- REMOTE PROCEDURES --
        !           339: 
        !           340: -- Logging On and Off --
        !           341: 
        !           342: Logon: PROCEDURE [
        !           343:        service: Clearinghouse.Name, credentials: Credentials,
        !           344:        verifier: Verifier ] 
        !           345:        RETURNS [ session: Session ]
        !           346:        REPORTS [ AuthenticationError, ServiceError, SessionError,
        !           347:                UndefinedError ]
        !           348:        = 0;
        !           349: 
        !           350: Logoff: PROCEDURE [ session: Session ]
        !           351:        REPORTS [ AuthenticationError, ServiceError, SessionError,
        !           352:                UndefinedError ]
        !           353:        = 1;
        !           354: 
        !           355: Continue: PROCEDURE [ session: Session ]
        !           356:        RETURNS [ continuance: CARDINAL ]
        !           357:        REPORTS [ AuthenticationError, SessionError, UndefinedError ]
        !           358:        = 19;
        !           359: 
        !           360: -- Opening and Closing Files --
        !           361: 
        !           362: Open: PROCEDURE [ attributes: AttributeSequence, directory: Handle,
        !           363:                controls: ControlSequence, session: Session ]
        !           364:        RETURNS [ file: Handle ]
        !           365:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           366:                AuthenticationError, ControlTypeError, ControlValueError,
        !           367:                HandleError, SessionError, UndefinedError ]
        !           368:        = 2;
        !           369: 
        !           370: Close: PROCEDURE [ file: Handle, session: Session ]
        !           371:        REPORTS [ AuthenticationError, HandleError, SessionError,
        !           372:                UndefinedError ] 
        !           373:        = 3;
        !           374: 
        !           375: -- Creating and Deleting Files --
        !           376: 
        !           377: Create: PROCEDURE [ directory: Handle, attributes: AttributeSequence,
        !           378:                controls: ControlSequence, session: Session ]
        !           379:        RETURNS [ file: Handle ]
        !           380:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           381:                AuthenticationError, ControlTypeError, ControlValueError,
        !           382:                HandleError, InsertionError, SessionError, SpaceError,
        !           383:                UndefinedError ]
        !           384:        = 4;
        !           385: 
        !           386: Delete: PROCEDURE [ file: Handle, session: Session ]
        !           387:        REPORTS [ AccessError, AuthenticationError, HandleError, SessionError,
        !           388:                UndefinedError ]
        !           389:        = 5;
        !           390: 
        !           391: -- Getting and Changing Controls (transient) --
        !           392: 
        !           393: GetControls: PROCEDURE [ file: Handle, types: ControlTypeSequence,
        !           394:                session: Session ]
        !           395:        RETURNS [ controls: ControlSequence ]
        !           396:        REPORTS [ AccessError, AuthenticationError, ControlTypeError,
        !           397:                HandleError, SessionError, UndefinedError ]
        !           398:        = 6;
        !           399: 
        !           400: ChangeControls: PROCEDURE [ file: Handle, controls: ControlSequence,
        !           401:                session: Session ]
        !           402:        REPORTS [ AccessError, AuthenticationError,
        !           403:                ControlTypeError, ControlValueError,
        !           404:                HandleError, SessionError, UndefinedError ]
        !           405:        = 7;
        !           406: 
        !           407: 
        !           408: -- Getting and Changing Attributes (permanent) --
        !           409: 
        !           410: GetAttributes: PROCEDURE [ file: Handle, types: AttributeTypeSequence,
        !           411:                session: Session ]
        !           412:        RETURNS [ attributes: AttributeSequence ]
        !           413:        REPORTS [ AccessError, AttributeTypeError, AuthenticationError,
        !           414:                HandleError, SessionError, UndefinedError ]
        !           415:        = 8;
        !           416: 
        !           417: ChangeAttributes: PROCEDURE [ file: Handle, attributes: AttributeSequence,
        !           418:                session: Session ]
        !           419:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           420:                AuthenticationError, HandleError, InsertionError,
        !           421:                SessionError, SpaceError, UndefinedError ]
        !           422:        = 9;
        !           423: 
        !           424: UnifyAccessLists: PROCEDURE [ directory: Handle, session: Session ]
        !           425:        REPORTS [ AccessError, AuthenticationError, HandleError, SessionError,
        !           426:                UndefinedError ] 
        !           427:        = 20;
        !           428: 
        !           429: -- Copying and Moving Files --
        !           430: 
        !           431: Copy: PROCEDURE [ file, destinationDirectory: Handle ,
        !           432:                attributes: AttributeSequence, controls: ControlSequence,
        !           433:                session: Session ]
        !           434:        RETURNS [ newFile: Handle ]
        !           435:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           436:                AuthenticationError, ControlTypeError, ControlValueError,
        !           437:                HandleError, InsertionError, SessionError, SpaceError,
        !           438:                UndefinedError ] 
        !           439:        = 10;
        !           440: 
        !           441: Move: PROCEDURE [ file, destinationDirectory: Handle ,
        !           442:                attributes: AttributeSequence, session: Session ]
        !           443:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           444:                AuthenticationError, HandleError, InsertionError,
        !           445:                SessionError, SpaceError, UndefinedError ] 
        !           446:        = 11;
        !           447: 
        !           448: -- Transfering Bulk Data (File Content) --
        !           449: 
        !           450: Store: PROCEDURE [ directory: Handle, attributes: AttributeSequence,
        !           451:                controls: ControlSequence, content: BulkData.Source,
        !           452:                session: Session ]
        !           453:        RETURNS [ file: Handle ]
        !           454:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           455:                AuthenticationError, ConnectionError, ControlTypeError,
        !           456:                ControlValueError, HandleError, InsertionError, SessionError,
        !           457:                SpaceError, TransferError, UndefinedError ]
        !           458:        = 12;
        !           459: 
        !           460: Retrieve: PROCEDURE [ file: Handle, content: BulkData.Sink, session: Session ]
        !           461:        REPORTS [ AccessError, AuthenticationError, ConnectionError,
        !           462:                HandleError, SessionError, TransferError,
        !           463:                UndefinedError ]
        !           464:        = 13;
        !           465: 
        !           466: Replace: PROCEDURE [ file: Handle,  attributes: AttributeSequence,
        !           467:                content: BulkData.Source, session: Session ]
        !           468:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           469:                AuthenticationError, ConnectionError, HandleError,
        !           470:                SessionError, SpaceError, TransferError, UndefinedError ]
        !           471:        = 14;
        !           472: 
        !           473: -- Transferring Bulk Data (Serialized Files) --
        !           474: 
        !           475: Serialize: PROCEDURE [ file: Handle, serializedFile: BulkData.Sink,
        !           476:                session: Session ]
        !           477:        REPORTS [ AccessError, AuthenticationError, ConnectionError,
        !           478:                HandleError, SessionError, TransferError, UndefinedError ]
        !           479:        = 15;
        !           480: 
        !           481: Deserialize: PROCEDURE [ directory: Handle, attributes: AttributeSequence,
        !           482:                controls: ControlSequence, serializedFile: BulkData.Source,
        !           483:                session: Session ]
        !           484:        RETURNS [ file: Handle ]
        !           485:        REPORTS [ AccessError, AttributeTypeError, AttributeValueError,
        !           486:                AuthenticationError, ConnectionError, ControlTypeError,
        !           487:                ControlValueError, HandleError, InsertionError,
        !           488:                SessionError, SpaceError, TransferError, UndefinedError ]
        !           489:        = 16;
        !           490: 
        !           491: -- Random Access to File Data --
        !           492: 
        !           493: RetrieveBytes: PROCEDURE [ file: Handle, range: ByteRange,
        !           494:                sink: BulkData.Sink, session: Session ]
        !           495:        REPORTS [ AccessError, HandleError, RangeError, SessionError,
        !           496:                UndefinedError ]
        !           497:        = 22;
        !           498: 
        !           499: ReplaceBytes: PROCEDURE [ file: Handle, range: ByteRange,
        !           500:                source: BulkData.Source, session: Session ]
        !           501:        REPORTS [ AccessError, HandleError, RangeError, SessionError,
        !           502:                SpaceError, UndefinedError ]
        !           503:        = 23;
        !           504: 
        !           505: -- Locating and Listing Files in a Directory --
        !           506: 
        !           507: Find: PROCEDURE [ directory: Handle, scope: ScopeSequence,
        !           508:                controls: ControlSequence, session: Session ]
        !           509:        RETURNS [ file: Handle ]
        !           510:        REPORTS [ AccessError, AuthenticationError,
        !           511:                ControlTypeError, ControlValueError, HandleError,
        !           512:                ScopeTypeError, ScopeValueError,
        !           513:                SessionError, UndefinedError ]
        !           514:        = 17;
        !           515: 
        !           516: List: PROCEDURE [ directory: Handle, types: AttributeTypeSequence,
        !           517:                scope: ScopeSequence, listing: BulkData.Sink,
        !           518:                session: Session ]
        !           519:        REPORTS [ AccessError, AttributeTypeError,
        !           520:                AuthenticationError, ConnectionError,
        !           521:                HandleError,
        !           522:                ScopeTypeError, ScopeValueError,
        !           523:                SessionError, TransferError, UndefinedError ]
        !           524:        = 18;
        !           525: 
        !           526: 
        !           527: 
        !           528: 
        !           529: 
        !           530: -- INTERPRETED ATTRIBUTE DEFINITIONS --
        !           531: 
        !           532: -- common definitions --
        !           533: 
        !           534: Time: TYPE = Time.Time;                -- seconds --
        !           535: nullTime: Time = Time.earliestTime;
        !           536: 
        !           537: User: TYPE = Clearinghouse.Name;
        !           538: 
        !           539: -- attributes --
        !           540: 
        !           541: accessList: AttributeType = 19;
        !           542: AccessEntry: TYPE = RECORD [key: Clearinghouse.Name, access: AccessSequence];
        !           543: AccessList: TYPE = RECORD [entries: SEQUENCE OF AccessEntry, defaulted: BOOLEAN];
        !           544: 
        !           545: checksum: AttributeType = 0;
        !           546: Checksum: TYPE = CARDINAL;
        !           547: unknownChecksum: Checksum = 177777B;
        !           548: 
        !           549: childrenUniquelyNamed: AttributeType = 1;
        !           550: ChildrenUniquelyNamed: TYPE = BOOLEAN;
        !           551: 
        !           552: createdBy: AttributeType = 2;
        !           553: CreatedBy: TYPE = User;
        !           554: 
        !           555: createdOn: AttributeType = 3;
        !           556: CreatedOn: TYPE = Time;
        !           557: 
        !           558: dataSize: AttributeType = 16;
        !           559: DataSize: TYPE = LONG CARDINAL;
        !           560: 
        !           561: defaultAccessList: AttributeType = 20;
        !           562: DefaultAccessList: TYPE = AccessList;
        !           563: 
        !           564: fileID: AttributeType = 4;
        !           565: FileID: TYPE = ARRAY 5 OF UNSPECIFIED;
        !           566: nullFileID: FileID = [0,0,0,0,0];
        !           567: 
        !           568: isDirectory: AttributeType = 5;
        !           569: IsDirectory: TYPE = BOOLEAN;
        !           570: 
        !           571: isTemporary: AttributeType = 6;
        !           572: IsTemporary: TYPE = BOOLEAN;
        !           573: 
        !           574: modifiedBy: AttributeType = 7;
        !           575: ModifiedBy: TYPE = User;
        !           576: 
        !           577: modifiedOn: AttributeType = 8;
        !           578: ModifiedOn: TYPE = Time;
        !           579: 
        !           580: name: AttributeType = 9;       -- name relative to parent --
        !           581: Name: TYPE = STRING;   -- must not exceed 100 bytes --
        !           582: 
        !           583: numberOfChildren: AttributeType = 10;
        !           584: NumberOfChildren: TYPE = CARDINAL;
        !           585: 
        !           586: ordering: AttributeType = 11;
        !           587: Ordering: TYPE = RECORD [key: AttributeType, ascending: BOOLEAN,
        !           588:                interpretation: Interpretation];
        !           589: -- see below for defaultOrdering, byAscendingPosition, byDescendingPosition --
        !           590: 
        !           591: parentID: AttributeType = 12;
        !           592: ParentID: TYPE = FileID;
        !           593: 
        !           594: pathname: AttributeType = 21;
        !           595: Pathname: TYPE = STRING;
        !           596: 
        !           597: position: AttributeType = 11;
        !           598: Position: TYPE = SEQUENCE 100 OF UNSPECIFIED;
        !           599: firstPosition: Position = [0];
        !           600: lastPosition: Position = [177777B];
        !           601: 
        !           602: readBy: AttributeType = 14;
        !           603: ReadBy: TYPE = User;
        !           604: 
        !           605: readOn: AttributeType = 15;
        !           606: ReadOn: TYPE = Time;
        !           607: 
        !           608: storedSize: AttributeType = 26;
        !           609: StoredSize: TYPE = LONG CARDINAL;
        !           610: 
        !           611: subtreeSize: AttributeType = 27;
        !           612: SubtreeSize: TYPE = LONG CARDINAL;
        !           613: 
        !           614: subtreeSizeLimit: AttributeType = 28;
        !           615: SubtreeSizeLimit: TYPE = LONG CARDINAL;
        !           616: nullSubtreeSizeLimit: SubtreeSizeLimit = 37777777777B;
        !           617: 
        !           618: type: AttributeType = 17;
        !           619: Type: TYPE = LONG CARDINAL;
        !           620: 
        !           621: version: AttributeType = 18;
        !           622: Version: TYPE = CARDINAL;
        !           623: lowestVersion: Version = 0;
        !           624: highestVersion: Version = 177777B;
        !           625: 
        !           626: defaultOrdering: Ordering = [key: name, ascending: TRUE, interpretation:
        !           627:                string];
        !           628: byAscendingPosition: Ordering = [key: position, ascending: TRUE,
        !           629:                interpretation: interpretationNone];
        !           630: byDescendingPosition: Ordering = [key: position, ascending: FALSE,
        !           631:                interpretation: interpretationNone];
        !           632: 
        !           633: 
        !           634: 
        !           635: 
        !           636: 
        !           637: -- BULK DATA FORMATS --
        !           638: 
        !           639: -- Serialized File Format, used in Serialize and Deserialize --
        !           640: 
        !           641: -- SerializedTree should contain the following but compiler won't allow it
        !           642: -- Use Sequence of Unspecified  to get around it for now.
        !           643: --
        !           644: -- SerializedTree: TYPE = RECORD [
        !           645: --     attributes: AttributeSequence,
        !           646: --     content: RECORD [ data: BulkData.StreamOfUnspecified ,
        !           647: --                     lastByteSignificant: BOOLEAN ],
        !           648: --     children: SEQUENCE OF SerializedTree ];
        !           649: 
        !           650: SerializedTree: TYPE = RECORD [
        !           651:        attributes: AttributeSequence,
        !           652:        content: RECORD [ data: BulkData.StreamOfUnspecified ,
        !           653:                        lastByteSignificant: BOOLEAN ],
        !           654:        children: SEQUENCE OF UNSPECIFIED ];
        !           655: 
        !           656: Serializedfile: TYPE = RECORD [ version: LONG CARDINAL, file: SerializedTree ];
        !           657: currentVersion: LONG CARDINAL = 3;
        !           658: 
        !           659: 
        !           660: -- Attribute Series Format, used in List --
        !           661: 
        !           662: StreamOfAttributeSequence: TYPE = CHOICE OF {
        !           663:        nextSegment(0) => RECORD [
        !           664:                segment: SEQUENCE OF AttributeSequence,
        !           665:                restOfStream: StreamOfAttributeSequence ],
        !           666:        lastSegment(1) => SEQUENCE OF AttributeSequence };
        !           667: 
        !           668: -- Line-oriented ASCII text file format, used in file interchange --
        !           669: 
        !           670: AsciiString: TYPE = RECORD [
        !           671:                lastByteSignificant: BOOLEAN,
        !           672:                bytes: SEQUENCE OF UNSPECIFIED ];
        !           673: 
        !           674: -- a liberty until the compiler can accept the alternate syntax --
        !           675: --     see StreamOfAttributeSequence --
        !           676: 
        !           677: LineType: TYPE = { nextLine(0), lastLine(1) };
        !           678: 
        !           679: StreamOfAsciiText: TYPE = CHOICE LineType OF {
        !           680:        nextLine => RECORD [
        !           681:                        line: AsciiString,
        !           682:                        restOfText: StreamOfAsciiText ],
        !           683:        lastLine => AsciiString };
        !           684: 
        !           685: 
        !           686: 
        !           687: 
        !           688: -- FILE TYPES --
        !           689: 
        !           690: tUnspecified: Type = 0;
        !           691: tDirectory: Type = 1;
        !           692: tText: Type = 2;
        !           693: tSerialized: Type = 3;
        !           694: tEmpty: Type = 4;
        !           695: tAscii: Type = 6;
        !           696: tAsciiText: Type = 7;
        !           697: 
        !           698: END. -- of Filing --
        !           699: 

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