Leaked source code of windows server 2003
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; SCCSID = @(#)cpmfcb.asm 1.1 85/04/10; SCCSID = @(#)cpmfcb.asm 1.1 85/04/10;BREAK <File Control Block definition>
;; Field definition for FCBs; The FCB has the following structure:;; +---------------------------+; | Drive indicator(byte) |; +---------------------------+; | Filename (8 chars) |; +---------------------------+; | Extension (3 chars) |; +---------------------------+; | Current Extent(word) |; +---------------------------+; | Record size (word) |; +---------------------------+; | File Size (2 words) |; +---------------------------+; | Date of write |; +---------------------------+; | Time of write |; +---------------------------+;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;; C A V E A T P R O G R A M M E R ;; ;; +---------------------------+; | 8 bytes reserved |; +---------------------------+; ;; C A V E A T P R O G R A M M E R ;;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;; | next record number |; +---------------------------+; | random record number |; +---------------------------+;
sys_fcb STRUCfcb_drive DB ?fcb_name DB 8 DUP (?)fcb_ext DB 3 DUP (?)fcb_EXTENT DW ?fcb_RECSIZ DW ? ; Size of record (user settable)fcb_FILSIZ DW ? ; Size of file in bytes; used with the ; following wordfcb_DRVBP DW ? ; BP for SEARCH FIRST and SEARCH NEXTfcb_FDATE DW ? ; Date of last writingfcb_FTIME DW ? ; Time of last writing;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;; C A V E A T P R O G R A M M E R ;; ;fcb_reserved DB 8 DUP (?) ; RESERVED; ;; C A V E A T P R O G R A M M E R ;;----+----+----+----+----+----+----+----+----+----+----+----+----+----+----;fcb_NR DB ? ; Next recordfcb_RR DB 4 DUP (?) ; Random recordsys_fcb ENDS
FILDIRENT = fcb_FILSIZ ; Used only by SEARCH FIRST and SEARCH ; NEXT
; FCB's reserve area is interpreted on NT as follows.
fcb_sfn EQU BYTE PTR fcb_reserved ; SFNfcb_res_dev EQU BYTE PTR fcb_reserved+1 ; 1 if local devicefcb_res_dummy EQU BYTE PTR fcb_reserved+2 ; Not using in NTfcb_res_dummy2 EQU BYTE PTR fcb_reserved+3 ; Not using in NTfcb_res_Sig EQU DWORD PTR fcb_reserved+4 ; Using as a check
; fcb_nsl_Sig is a signature to check if the FCB-SFT association is valid.;; for a local device this field contains the devptr. sft's field devptr; is checked against it.;; for a file/UNC/pipe etc this field contains an NT handle. sft's NThandle; field is checked against it.
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