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From: dalegass@dalcsug.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Reading/Writing Directories using FCBS
Message-ID: <117@dalcsug.UUCP>
Date: Fri, 7-Aug-87 16:15:18 EDT
Article-I.D.: dalcsug.117
Posted: Fri Aug  7 16:15:18 1987
Date-Received: Sun, 9-Aug-87 01:02:07 EDT
Organization: Dalhousie University, Halifax, N.S., Canada
Lines: 31

I have a specialized need where I have to be able to write to a subdirectory.
No flames, please, about it being bad style to do this, but in my case it is
required.

I have heard that the only way to actually write to a subdirectory is to
modify it using FCB's, as opposed to the advanced file I/O methods...  However,
I seem to be unable to do this.  Could anyone give me some advice on what
I might be doing wrong.  Here's the basic idea of how I'm trying to open
this directory:

	MOV	AH,0FH		; CODE FOR FCB OPEN
	MOV	DS,[SEG]	; GET SEGMENT FOR FCB
	MOV	DX,FCBOFS	; OFFSET FOR EXTENDED FCB
	INT	21H		; DO IT

Where SEG:FCBOFS is set to
	DB 	0FFH		; EXTENDED FLAG
	DB	5 DUP (0)	; RESERVED
	DB	010H		; ATTRIBUTE = DIRECTORY
	DB	0		; DRIVE (USING DEFAULT)
	DB	'DIRNAME    '	; DIRECTORY NAME.

And this doesn't work...  I believe the extended error code is along the lines
of access denied.

Another route I've attempted is to CHMOD the direcotry into a file, but this
fails as well.

Please, any suggestions are greatly needed....

dalegass@dalcsug.uucp