?? rxdosifs.asm
字號(hào):
TITLE 'ifs - DOS Installable File System Interface'
PAGE 59, 132
.LALL
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; DOS Installable File System Interface ;
;...............................................................;
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; Real Time Dos ;
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -;
; ;
; This material was created as a published version of a DOS ;
; equivalent product. This program logically functions in ;
; the same way as MSDOS functions and it is internal data ;
; structure compliant with MSDOS 6.0 ;
; ;
; This product is distributed AS IS and contains no warranty ;
; whatsoever, including warranty of merchantability or ;
; fitness for a particular purpose. ;
; ;
; ;
; (c) Copyright 1990, 1997. Api Software and Mike Podanoffsky ;
; All Rights Reserved Worldwide. ;
; ;
; This product is protected under copyright laws and may not ;
; be reproduced in whole or in part, in any form or media, ;
; included but not limited to source listing, facsimile, data ;
; transmission, cd-rom, or floppy disk without the expressed ;
; written consent of the author. ;
; ;
; License for distribution for commercial use or resale ;
; required from: ;
; ;
; Api Software ;
; 12 South Walker Street ;
; Lowell, MA 01851 ;
; ;
; internet: mikep@world.std.com ;
; ;
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -;
; Compile with MASM 5.1 ;
;...............................................................;
include rxdosmac.asm
include rxdosdef.asm
RxDOS SEGMENT PARA PUBLIC 'CODE'
assume cs:RxDOS, ds:RxDOS, es:RxDOS, ss:RxDOS
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; DOS Installable File System Interface ;
;...............................................................;
public Interrupt2F
; defined in rxdos
extrn _RetCallersStackFrame : near
extrn _RxDOS_pCDS : dword
extrn _RxDOS_bLastDrive : byte
extrn _RxDOS_CurrentDrive : byte
extrn SDAFirstName : byte
extrn SDASecondName : byte
extrn SDApCurrentCDS : dword
extrn pexterrInvalidFunction : near
extrn pexterrFileNotFound : near
extrn pexterrPathNotFound : near
extrn pexterrIllegalName : near
extrn pexterrNoHandlesAvailable : near
extrn pexterrAccessDenied : near
extrn pexterrInvalidHandle : near
extrn pexterrArenaTrashed : near
extrn pexterrNotEnoughMemory : near
extrn pexterrInvalidBlock : near
extrn pexterrInvalidAccess : near
extrn pexterrInvalidDrive : near
extrn pexterrCurrentDirectory : near
extrn pexterrNoMoreFiles : near
extrn pexterrFileExists : near
; defined in rxdosccb
extrn CCBChanged : near
extrn linkBegCCB : near
extrn locateCCBPHeader : near
extrn readBuffer : near
extrn unlinkCCB : near
extrn updateAllChangedCCBBuffers : near
; defined in rxdosdev
extrn checkforDeviceName : near
extrn checkforDeviceType : near
extrn DefineDPB : near
extrn getDPB : near
extrn getSysDate : near
extrn setSysDate : near
extrn getExpandedDateTime : near
extrn DevRead : near
extrn DevWrite : near
; defined in rxdosfcb
extrn initFCBfromSFT : near
extrn buildFindFromFCB : near
extrn buildDTAfcbFind : near
; defined in rxdosfil
extrn blankinitDirName : near
extrn initdiskAccess : near
extrn compareDirEntries : near
extrn computeLogSectorNumber : near
extrn ExpandFileName : near
extrn LocateFile : near
extrn LocateFreeDirSlot : near
extrn LocateFileByAttribute : near
extrn GetActualDrive : near
extrn getCurrDirCluster : near
extrn getDevice : near
extrn getDrive : near
extrn getWhereInDir : near
; defined in rxdosmem
extrn _initializeMemoryBlock : near
extrn _collectMemoryBlocks : near
extrn _releaseOwnerMemoryBlocks : near
extrn _allocateUpperMB : near
extrn _allocateConvMB : near
extrn _modifyMemBlock : near
; defined in rxdossft
extrn createSFTEntry : near
extrn FindAvailableSFTHandle : near
extrn findmatchingFCBSFT : near
extrn FindSFTbyHandle : near
extrn MapApptoSFTHandle : near
extrn MapSFTtoAppHandle : near
extrn releaseSFT : near
extrn VerifyAvailableHandle : near
extrn _SFTReadFile : near
extrn _SFTWriteFile : near
extrn _SFTOpenFile : near
extrn _SFTCreateFile : near
extrn _SFTCloseFile : near
extrn _SFTCloseAllFiles : near
extrn _SFTCommitFile : near
; defined in rxdosstr
extrn CopyString : near
extrn CopyBlock : near
extrn convFCBNametoASCIZ : near
extrn convFilenametoFCBString : near
extrn getSysDateinDirFormat : near
extrn upperCase : near
extrn lowerCase : near
extrn __ascii_stosb : near
extrn getMonthDayYear : near
extrn getDaysSince1980 : near
extrn StringLength : near
extrn condStringLength : near
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; Installable File System (2f/11) Dispatch Table ;
;...............................................................;
IFS_Dispatch:
dw _IFSInstallCheck ; 00h Install Check
dw _IFSRemoveDirectory ; 01h Remove Directory
dw _IFSUndefined ; 02h (Unused)
dw _IFSMakeDirectory ; 03h Make Directory
dw _IFSUndefined ; 04h (Unused)
dw _IFSChangeDirectory ; 05h Change Directory
dw _IFSCloseFile ; 06h Close File
dw _IFSCommitFile ; 07h Commit File
dw _IFSReadFile ; 08h Read File
dw _IFSWriteFile ; 09h Write File
dw _IFSLockRegion ; 0Ah Lock Region
dw _IFSUnlockRegion ; 0Bh Unlock Region
dw _IFSGetDiskSpace ; 0Ch Get Disk Space
dw _IFSUndefined ; 0Dh (Unused)
dw _IFSSetFileAttributes ; 0Eh Set File Attributes
dw _IFSGetFileAttributes ; 0Fh Get File Attributes
dw _IFSUndefined ; 10h (Unused)
dw _IFSRenameFile ; 11h Rename File
dw _IFSUndefined ; 12h (Unused)
dw _IFSDeleteFile ; 13h Delete File
dw _IFSUndefined ; 14h (Unused)
dw _IFSUndefined ; 15h (Unused)
dw _IFSOpenFile ; 16h Open File
dw _IFSCreateFile ; 17h Create File
dw _IFSUnsupported ; 18h Create File without CDS
dw _IFSUndefined ; 19h (Unused)
dw _IFSUndefined ; 1Ah (Unused)
dw _IFSFindFirst ; 1Bh Find First
dw _IFSFindNext ; 1Ch Find Next
dw _IFSCloseAllFiles ; 1Dh Close All Files
dw _IFSSetRedirection ; 1Eh Set Redirection
dw _IFSPrinterSetup ; 1Fh Printer Setup
dw _IFSFlushBuffers ; 20h Flush Buffers
dw _IFSSeekFromEnd ; 21h Seek From End
dw _IFSTerminateProcess ; 22h Terminate Process
dw _IFSQualifyFilename ; 23h Qualify Filename
dw _IFSUndefined ; 24h (Unused)
dw _IFSPrinterMode ; 25h Printer Mode
dw _IFSPrinterOnOff ; 26h Printer On/Off
dw _IFSCopy ; 27h Copy
dw _IFSUndefined ; 28h (Unused)
dw _IFSUndefined ; 29h (Unused)
dw _IFSUndefined ; 2Ah (Unused)
dw _IFSIOCTL ; 2Bh IOCTL
dw _IFSUndefined ; 2Ch (Unused)
dw _IFSUndefined ; 2Dh (Unused)
dw _IFSExpandedOpen ; 2Eh Expanded Open/Create
dw _IFSUndefined ; 2Fh (Unused)
dw _IFSGetSegment ; 30h Get NFS Segment
_IFS_maxFunctionCode equ ( $ - IFS_Dispatch ) / 2
IFS_INTERFACECODE equ 11h
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; Int 2F Original Chain ;
;...............................................................;
Int2F_OriginalPtr:
dd Int2F_DummyReturn
Int2F_DummyReturn:
iret
;''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''';
; Install 2F Interface ;
;- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -;
; ;
; We know that the call is for us because no other redirector ;
; interface has claimed this call. ;
; ;
;...............................................................;
InstallRedirector:
pushf ; save interrupts
cli
xor ax, ax
mov ds, ax
mov bx, 002Fh * 4
push word ptr [ bx. _pointer ] ; address
push word ptr [ bx. _segment ] ; segment
mov word ptr [ bx. _pointer ], offset Interrupt2F
mov word ptr [ bx. _segment ], ss ; segment
pop word ptr ss:[ Int2F_OriginalPtr. _segment ]
pop word ptr ss:[ Int2F_OriginalPtr. _pointer ] ; original
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