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page 80,132
title CP/DOS DosQFileMode mapper
dosxxx segment byte public 'dos'
assume cs:dosxxx,ds:nothing,es:nothing,ss:nothing
;
;**********************************************************************
;*
;* MODULE: dosqfilemode Read file attribute
;*
;* FUNCTION: Query file mode
;*
;* CALLING SEQUENCE:
;*
;* push@ asciiz file path name
;* push@ word attribute return area
;* push dword reserved
;* call dosqfilemode
;*
;* MODULES CALLED: PC-DOS Int 21h, ah=43h, change file mode
;*
;*********************************************************************
public dosqfilemode
.sall
.xlist
include macros.inc
.list
error_code equ 0002h
str struc
old_bp dw ?
return dd ?
rsrvd dd ?
Attrib dd ? ; current attribute pointer
Path dd ? ; file path name pointer
str ends
dosqfilemode proc far
Enter dosqfilemode ; push registers
lds dx,[bp].path ; set path name
mov ax,4300h ; set op code
int 21h ; get file mode
jc error ; jump if error
lds si,[bp].attrib ; setup return data area
mov word ptr [si],cx ; save attribute there
sub ax,ax ; set good return code
jmp short exit ; return
error: mov ax,error_code ; set error code
exit: mexit ; pop registers
ret size str - 6 ; return
dosqfilemode endp
dosxxx ends
end
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