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IOERRORC.DEF
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1994-05-11
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DEFINITION MODULE IOErrorCodes;
(********************************************************)
(* *)
(* I/O subsystem error codes. *)
(* *)
(* This module defines a set of error codes which may *)
(* be used uniformly throughout the file system. *)
(* *)
(* Programmer: P. Moylan *)
(* Last edited: 11 May 1994 *)
(* Status: OK *)
(* *)
(********************************************************)
TYPE
ErrorCode = (
OK, (* Normal return, no error *)
OperationAborted, (* Operator forced abort *)
(* Error codes from module Files. *)
FileNotOpen, (* Should have opened file first *)
(* Error codes from module Devices. *)
NoSuchDevice, (* Illegal device *)
NoSuchUnit, (* Illegal unit number *)
(* Error codes from module Directories. *)
FeatureNotImplemented, (* Cannot yet handle this case *)
InvalidFileNameString, (* Could not parse filename string *)
DirectoryNotFound, (* Subdirectory name not found *)
NotADirectory, (* Supposed directory name is not a dir *)
NameNotFound, (* File name not found in directory *)
DuplicateFileName, (* File name already exists *)
DeviceFull, (* No room to create/extend file *)
DirectoryFull, (* No room to create new directory entry *)
(* Error codes from the disk device drivers. *)
BadDMAAddress, (* Operation uses a memory buffer which *)
(* the DMA hardware cannot handle *)
IllegalBlockNumber, (* The caller requested an operation on *)
(* a non-existent disk block. *)
BadCommand, (* We tried to do something illegal. *)
ControllerNotListening, (* Could not get the disk controller *)
(* to accept a command. *)
ControllerOutOfSync, (* Status information from the disk *)
(* controller does not make sense. *)
TimeoutError, (* Data request interrupt did not *)
(* arrive within a reasonable time. *)
CalibrationFailure, (* Did not succeed in driving the head *)
(* back to its home position. *)
SeekFailure, (* Failed to seek to the desired track. *)
DriveNotReady, (* Could be an equipment failure, but *)
(* more commonly means that the drive *)
(* door is open or there is no disk in *)
(* the drive. *)
SectorNotFound, (* Missing sector, cylinder mismatch, *)
(* and similar errors. This could *)
(* mean a badly formatted disk, it *)
(* could be just one faulty block, or *)
(* it could mean that a recalibration *)
(* is needed. *)
BadBlock, (* The sector has its "bad block" *)
(* mark set - should not be used. *)
BadData, (* Something on the disk is corrupted. *)
(* Could be a transient error, e.g. *)
(* read error caused by a speck of *)
(* dust, but it could also be true *)
(* corruption of the medium. *)
WriteFault, (* Occurs only with hard disk, reflects *)
(* a hardware fault signal. *)
WriteProtected, (* Attempted write to a write-protected *)
(* disk. *)
UndiagnosedFailure (* Miscellaneous error. *)
); (* End of the list of error codes *)
(************************************************************************)
PROCEDURE TranslateErrorCode (code: ErrorCode;
VAR (*OUT*) string: ARRAY OF CHAR);
(* Converts code to its textual representation. *)
END IOErrorCodes.