🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.os.msdos.programmer
Article #553

Re: Opening files using DOS services

#553
From: Christian Blum
Date: Thu, 30 Jul 1992 13:07
17 lines
1360 bytes
Shaul Wallach <F66204@BARILVM.BITNET> writes:
>      Here is a novice's programming question to which I haven't
> been able to find an answer in the books at hand. When you
> create a disk file using functions AH = 3C or 5B, DOS (i.e.
> INT 21H) returns a file handle in AX. However, these functions
> don't require any file-access code in AL. Can I assume that
> the file will be opened for write access, or must I first
> explicitly open the file with function 3D and a file-access
> code in AL and use the handle this function returns, ignoring
> the handle returned by function 3C or 5B?

O dear (:-), of course it is opened for write access! If you tell DOS
that you want to create a file, do you think it's that picky and doesn't
let you write to it?
BTW: have you tried it? That's a good method of getting ahead...

Chris
Technical Details
Message-ID: <1992Jul30.130751.17044@coli.uni-sb.de>
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!Germany.EU.net!unido!sbsvax!coli-gate.coli.uni-sb.de!sbustd!chbl
References: <92210.214621F66204@BARILVM.BITNET>

Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!Germany.EU.net!unido!sbsvax!coli-gate.coli.uni-sb.de!sbustd!chbl
From: chbl@sbustd.rz.uni-sb.de (Christian Blum)
Newsgroups: comp.os.msdos.programmer,comp.sys.ibm.pc.misc
Subject: Re: Opening files using DOS services
Message-ID: <1992Jul30.130751.17044@coli.uni-sb.de>
Date: 30 Jul 92 13:07:51 GMT
References: <92210.214621F66204@BARILVM.BITNET>
Sender: news@coli.uni-sb.de (Usenet news system)
Organization: Studenten-Mail, Rechenzentrum Universitaet des Saarlandes
Lines: 17