Re: File truncation under PC-DOS

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Article #5591

#5591

From: bill
Date: Wed, 05 Feb 1986 17:52

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Truncating a file to 'n' bytes is fairly easy:

[1] Open the file for read/write access using Int 21h function 3Dh.

[2] Use Int 21h function 42h to position the file pointer to position 'n'.

[3] Truncate the file at that point by using Int 21h function 40h (Write
    to File or Device) with a byte count of zero in CX.

[4] Close the file using Int 21h function 3Eh (or 4Ch).

bill frolik
hplabs!hp-pcd!bill

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Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!whuxl!whuxlm!akgua!gatech!ut-sally!pyramid!hplabs!hp-pcd!bill
From: bill@hp-pcd.UUCP
Newsgroups: net.micro.pc
Subject: Re: File truncation under PC-DOS
Message-ID: <15200010@hpcvlo.UUCP>
Date: Wed, 5-Feb-86 12:52:00 EST
Article-I.D.: hpcvlo.15200010
Posted: Wed Feb  5 12:52:00 1986
Date-Received: Tue, 11-Feb-86 03:41:14 EST
References: <901@dataioDa.UUCP>
Organization: Hewlett-Packard - Corvallis, OR
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Nf-ID: #R:dataioDa:-90100:hpcvlo:15200010:000:413
Nf-From: hpcvlo!bill    Feb  5 09:52:00 1986

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