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; SCCSID = @(#)filemode.inc 12.6 89/04/26
BREAK <Standard I/O assignments>
stdin EQU 0
stdout EQU 1
stderr EQU 2
stdaux EQU 3
stdprn EQU 4
BREAK <File modes - passed to open, stored in sf_mode or JFN_Flags>
;
; The OS/2 api calls DosOpen, DosSetFHandState, and DosQFHandState
; all use a mode word parameter. Some of these values are stored
; in the sft (system file table) in the field sf_mode. Others
; are stored in the JFN flags (JFN_Flg_Ptr). The layout of
; sf_mode and the word parameter for the call is the same. The
; following EQU's are used to get to these values. The layout
; of the word is:
;
; 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
; D W F C R L L L I S S S M A A A
;
; with:
; AAA (2-0): The Access mode (read only, etc.)
; SSS (6-4): Sharing mode (deny write acces to others, etc.)
; LLL (8-10): Locality of reference (sequential, random, etc.)
; M (3) : Monitor open
; I (7) : Not inherited by child
; R (11): Rumored to be used by spooler. API caller must set
; this to zero.
; C (12): Advise device driver not to cache data. This is
; stored in JFN flags.
; F (13): Fail errors
; W (14): write through
; D (15): Direct access open
;
; The DosOpen2 and $Extended_Open2 calls has an additional word for
; openmode. The layout of this word is
;
; 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
; P U U U U U U U U U U U U U U U
;
; with:
; P (15): Open physical disk (used by FDISK program). This bit
; is set by procedure DevReturnHandle. API/INT21h
; caller must set this bit to zero. This bit is stored
; in sft.
;
; U : Unused anywhere. API caller must set these bits to
; zero.
;
; NOTE: Please document all use of the openmode bits including those
; that are internal to the kernel (e.g. the P bit).
; wwwwxxxxyyyyzzzz
; 5432109876543210
open_access EQU 0000000000000111B
open_for_read EQU 00h
open_for_write EQU 01h
open_for_both EQU 02h
open_max EQU 02h
open_for_exec EQU 03h ; open via internal exec call
; (not available to API)
open_monitor EQU 0000000000001000B
open_sharing_mode EQU 0000000001110000B
sharing_compat EQU 000H
sharing_deny_both EQU 010H
sharing_deny_write EQU 020H
sharing_deny_read EQU 030H
sharing_deny_none EQU 040H
sharing_max EQU 040H ; max value for check_access_AX
; (check_access_ax handles
; these bits are for openmode
open_no_inherit EQU 0000000010000000B ; Child does not inherit handle
open_autofail EQU 0010000000000000B ; hard errors failed
open_write_through EQU 0100000000000000B ; write through to disk
open_direct EQU 1000000000000000B ; open of a device for direct access
open_no_cache EQU 0001000000000000B ; don't cache data
open_locality EQU 0000011100000000B ; locality of reference
locality_unknown EQU 000H
locality_sequential EQU 100H
locality_random EQU 200H
locality_semirandom EQU 300H
; these bits are for openmode2 available to DosOpen2/$Extended_Open2
;
open2_phys_disk EQU 1000000000000000B ; open physical disk
; Bits carried in SFT mode field (@PhysDisk)
o_mode_in_sft EQU open_direct+open_monitor+open_sharing_mode+open_access+open_locality
; Bits carried in JFN flags
o_mode_in_flags EQU open_write_through+open_autofail+open_no_inherit+open_no_cache
; Reserved bits
o_mode_reserved EQU NOT (o_mode_in_sft+o_mode_in_flags)
o_mode2_reserved equ -1 ; all bits are reserved
SUBTTL
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