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|
; SCCSID = @(#)sf.asm 1.1 85/04/10
BREAK <Internal system file table format>
;
; AN000 version 4.00 Jan. 1988
; AN003 PTM 3680 -- make NAME offset the same as before (<=3.30)
; AN009 PTM 3839 reorder SFT for MS WINDOWS
;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
; C A V E A T P R O G R A M M E R ;
; ;
;
; system file table
;
SF STRUC
SFLink DD ?
SFCount DW ? ; number of entries
SFTable DW ? ; beginning of array of the following
SF ENDS
;
; system file table entry
;
sf_entry STRUC
sf_ref_count DW ? ; number of processes sharing entry
; if FCB then ref count
sf_mode DW ? ; mode of access or high bit on if FCB
sf_attr DB ? ; attribute of file
sf_flags DW ? ;Bits 8-15
; Bit 15 = 1 if remote file
; = 0 if local file or device
; Bit 14 = 1 if date/time is not to be
; set from clock at CLOSE. Set by
; FILETIMES and FCB_CLOSE. Reset by
; other reseters of the dirty bit
; (WRITE)
; Bit 13 = Pipe bit (reserved)
;
; Bits 0-7 (old FCB_devid bits)
; If remote file or local file, bit
; 6=0 if dirty Device ID number, bits
; 0-5 if local file.
; bit 7=0 for local file, bit 7
; =1 for local I/O device
; If local I/O device, bit 6=0 if EOF (input)
; Bit 5=1 if Raw mode
; Bit 0=1 if console input device
; Bit 1=1 if console output device
; Bit 2=1 if null device
; Bit 3=1 if clock device
sf_devptr DD ? ; Points to DPB if local file, points
; to device header if local device,
; points to net device header if
; remote
sf_firclus DW ? ; First cluster of file (bit 15 = 0)
sf_time DW ? ; Time associated with file
sf_date DW ? ; Date associated with file
sf_size DD ? ; Size associated with file
sf_position DD ? ; Read/Write pointer or LRU count for FCBs
;
; Starting here, the next 7 bytes may be used by the file system to store an
; ID
;
sf_cluspos DW ? ; Position of last cluster accessed
sf_dirsec DD ? ; Sector number of directory sector for
; for this file
sf_dirpos DB ? ; Offset of this entry in the above
;
; End of 7 bytes of file-system specific info.
;
sf_name DB 11 DUP (?) ; 11 character name that is in the
; directory entry. This is used by
; close to detect file deleted and
; disk changed errors.
; SHARING INFO
sf_chain DD ? ; link to next SF
sf_UID DW ?
sf_PID DW ?
sf_MFT DW ?
sf_lstclus DW ? ;AN009; Last cluster accessed
sf_IFS_HDR DD ?
sf_entry ENDS
sf_fsda EQU BYTE PTR sf_cluspos ;DOS 4.00
sf_serial_ID EQU WORD PTR sf_firclus ;DOS 4.00
sf_netid EQU BYTE PTR sf_cluspos
sf_OpenAge EQU WORD PTR sf_position+2
sf_LRU EQU WORD PTR sf_position
sf_default_number EQU 5h
;
; Note that we need to mark an SFT as being busy for OPEN/CREATE. This is
; because an INT 24 may prevent us from 'freeing' it. We mark this as such
; by placing a -1 in the ref_count field.
;
sf_busy EQU -1
; mode mask for FCB detection
sf_isfcb EQU 1000000000000000B
; Flag word masks
sf_isnet EQU 1000000000000000B
sf_close_nodate EQU 0100000000000000B
sf_pipe EQU 0010000000000000B
sf_no_inherit EQU 0001000000000000B
sf_net_spool EQU 0000100000000000B
Handle_Fail_I24 EQU 0000000100000000B ;BIT 8 - DISK FULL I24 ERROR
; Local file/device flag masks
devid_file_clean EQU 40h ; true if file and not written
devid_file_mask_drive EQU 3Fh ; mask for drive number
devid_device EQU 80h ; true if a device
devid_device_EOF EQU 40h ; true if end of file reached
devid_device_raw EQU 20h ; true if in raw mode
devid_device_special EQU 10h ; true if special device
devid_device_clock EQU 08h ; true if clock device
devid_device_null EQU 04h ; true if null device
devid_device_con_out EQU 02h ; true if console output
devid_device_con_in EQU 01h ; true if consle input
; ;
; C A V E A T P R O G R A M M E R ;
;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
;
; structure of devid field as returned by IOCTL is:
;
; BIT 7 6 5 4 3 2 1 0
; |---|---|---|---|---|---|---|---|
; | I | E | R | S | I | I | I | I |
; | S | O | A | P | S | S | S | S |
; | D | F | W | E | C | N | C | C |
; | E | | | C | L | U | O | I |
; | V | | | L | K | L | T | N |
; |---|---|---|---|---|---|---|---|
; ISDEV = 1 if this channel is a device
; = 0 if this channel is a disk file
;
; If ISDEV = 1
;
; EOF = 0 if End Of File on input
; RAW = 1 if this device is in Raw mode
; = 0 if this device is cooked
; ISCLK = 1 if this device is the clock device
; ISNUL = 1 if this device is the null device
; ISCOT = 1 if this device is the console output
; ISCIN = 1 if this device is the console input
;
; If ISDEV = 0
; EOF = 0 if channel has been written
; Bits 0-5 are the block device number for
; the channel (0 = A, 1 = B, ...)
;
devid_ISDEV EQU 80h
devid_EOF EQU 40h
devid_RAW EQU 20h
devid_SPECIAL EQU 10H
devid_ISCLK EQU 08h
devid_ISNUL EQU 04h
devid_ISCOT EQU 02h
devid_ISCIN EQU 01h
devid_block_dev EQU 1Fh ; mask for block device number
|
