v4.0/src/INC/SF.INC

   1 ;       SCCSID = @(#)sf.asm     1.1 85/04/10
   2 BREAK <Internal system file table format>
   3 ;
   4 ;   AN000   version 4.00   Jan. 1988
   5 ;   AN003   PTM 3680 --  make NAME offset the same as before (<=3.30)
   6 ;   AN009   PTM 3839     reorder SFT for MS WINDOWS
   7
   8 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
   9 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
  10 ;                                                                          ;
  11 ;
  12 ; system file table
  13 ;
  14
  15 SF              STRUC
  16 SFLink          DD      ?
  17 SFCount         DW      ?               ; number of entries
  18 SFTable         DW      ?               ; beginning of array of the following
  19 SF              ENDS
  20
  21 ;
  22 ; system file table entry
  23 ;
  24
  25 sf_entry        STRUC
  26 sf_ref_count    DW      ?               ; number of processes sharing entry
  27                                         ;   if FCB then ref count
  28 sf_mode         DW      ?               ; mode of access or high bit on if FCB
  29 sf_attr         DB      ?               ; attribute of file
  30 sf_flags        DW      ?               ;Bits 8-15
  31                                         ; Bit 15 = 1 if remote file
  32                                         ;        = 0 if local file or device
  33                                         ; Bit 14 = 1 if date/time is not to be
  34                                         ;   set from clock at CLOSE.  Set by
  35                                         ;   FILETIMES and FCB_CLOSE.  Reset by
  36                                         ;   other reseters of the dirty bit
  37                                         ;   (WRITE)
  38                                         ; Bit 13 = Pipe bit (reserved)
  39                                         ;
  40                                         ; Bits 0-7 (old FCB_devid bits)
  41                                         ; If remote file or local file, bit
  42                                         ; 6=0 if dirty Device ID number, bits
  43                                         ; 0-5 if local file.
  44                                         ; bit 7=0 for local file, bit 7
  45                                         ;      =1 for local I/O device
  46                                         ; If local I/O device, bit 6=0 if EOF (input)
  47                                         ;               Bit 5=1 if Raw mode
  48                                         ;               Bit 0=1 if console input device
  49                                         ;               Bit 1=1 if console output device
  50                                         ;               Bit 2=1 if null device
  51                                         ;               Bit 3=1 if clock device
  52 sf_devptr       DD      ?               ; Points to DPB if local file, points
  53                                         ; to device header if local device,
  54                                         ; points to net device header if
  55                                         ; remote
  56 sf_firclus      DW      ?               ; First cluster of file (bit 15 = 0)
  57 sf_time         DW      ?               ; Time associated with file
  58 sf_date         DW      ?               ; Date associated with file
  59 sf_size         DD      ?               ; Size associated with file
  60 sf_position     DD      ?               ; Read/Write pointer or LRU count for FCBs
  61 ;
  62 ; Starting here, the next 7 bytes may be used by the file system to store an
  63 ; ID
  64 ;
  65 sf_cluspos      DW      ?               ; Position of last cluster accessed
  66 sf_dirsec       DD      ?               ; Sector number of directory sector for
  67                                         ; for this file
  68 sf_dirpos       DB      ?               ; Offset of this entry in the above
  69 ;
  70 ; End of 7 bytes of file-system specific info.
  71 ;
  72 sf_name         DB      11 DUP (?)      ; 11 character name that is in the
  73                                         ; directory entry.  This is used by
  74                                         ; close to detect file deleted and
  75                                         ; disk changed errors.
  76
  77 ; SHARING INFO
  78 sf_chain        DD      ?               ; link to next SF
  79 sf_UID          DW      ?
  80 sf_PID          DW      ?
  81 sf_MFT          DW      ?
  82 sf_lstclus      DW      ?               ;AN009; Last cluster accessed
  83 sf_IFS_HDR      DD      ?
  84 sf_entry        ENDS
  85
  86 sf_fsda         EQU     BYTE PTR sf_cluspos          ;DOS 4.00
  87 sf_serial_ID    EQU     WORD PTR sf_firclus          ;DOS 4.00
  88 sf_netid        EQU     BYTE PTR sf_cluspos
  89 sf_OpenAge      EQU     WORD PTR sf_position+2
  90 sf_LRU          EQU     WORD PTR sf_position
  91
  92 sf_default_number   EQU     5h
  93
  94 ;
  95 ; Note that we need to mark an SFT as being busy for OPEN/CREATE.  This is
  96 ; because an INT 24 may prevent us from 'freeing' it.  We mark this as such
  97 ; by placing a -1 in the ref_count field.
  98 ;
  99
 100 sf_busy EQU -1
 101
 102
 103 ; mode mask for FCB detection
 104 sf_isfcb                EQU     1000000000000000B
 105
 106 ; Flag word masks
 107 sf_isnet                EQU     1000000000000000B
 108 sf_close_nodate         EQU     0100000000000000B
 109 sf_pipe                 EQU     0010000000000000B
 110 sf_no_inherit           EQU     0001000000000000B
 111 sf_net_spool            EQU     0000100000000000B
 112 Handle_Fail_I24         EQU     0000000100000000B  ;BIT 8 - DISK FULL I24 ERROR
 113
 114 ; Local file/device flag masks
 115 devid_file_clean        EQU     40h     ; true if file and not written
 116 devid_file_mask_drive   EQU     3Fh     ; mask for drive number
 117
 118 devid_device            EQU     80h     ; true if a device
 119 devid_device_EOF        EQU     40h     ; true if end of file reached
 120 devid_device_raw        EQU     20h     ; true if in raw mode
 121 devid_device_special    EQU     10h     ; true if special device
 122 devid_device_clock      EQU     08h     ; true if clock device
 123 devid_device_null       EQU     04h     ; true if null device
 124 devid_device_con_out    EQU     02h     ; true if console output
 125 devid_device_con_in     EQU     01h     ; true if consle input
 126 ;                                                                          ;
 127 ;            C  A  V  E  A  T     P  R  O  G  R  A  M  M  E  R             ;
 128 ;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;
 129
 130 ;
 131 ; structure of devid field as returned by IOCTL is:
 132 ;
 133 ;       BIT     7   6   5   4   3   2   1   0
 134 ;             |---|---|---|---|---|---|---|---|
 135 ;             | I | E | R | S | I | I | I | I |
 136 ;             | S | O | A | P | S | S | S | S |
 137 ;             | D | F | W | E | C | N | C | C |
 138 ;             | E |   |   | C | L | U | O | I |
 139 ;             | V |   |   | L | K | L | T | N |
 140 ;             |---|---|---|---|---|---|---|---|
 141 ;       ISDEV = 1 if this channel is a device
 142 ;             = 0 if this channel is a disk file
 143 ;
 144 ;       If ISDEV = 1
 145 ;
 146 ;             EOF = 0 if End Of File on input
 147 ;             RAW = 1 if this device is in Raw mode
 148 ;                 = 0 if this device is cooked
 149 ;             ISCLK = 1 if this device is the clock device
 150 ;             ISNUL = 1 if this device is the null device
 151 ;             ISCOT = 1 if this device is the console output
 152 ;             ISCIN = 1 if this device is the console input
 153 ;
 154 ;       If ISDEV = 0
 155 ;             EOF = 0 if channel has been written
 156 ;             Bits 0-5  are  the  block  device  number  for
 157 ;                 the channel (0 = A, 1 = B, ...)
 158 ;
 159 devid_ISDEV     EQU     80h
 160 devid_EOF       EQU     40h
 161 devid_RAW       EQU     20h
 162 devid_SPECIAL   EQU     10H
 163 devid_ISCLK     EQU     08h
 164 devid_ISNUL     EQU     04h
 165 devid_ISCOT     EQU     02h
 166 devid_ISCIN     EQU     01h
 167
 168 devid_block_dev EQU     1Fh             ; mask for block device number