Article View: comp.sys.ibm.pc.misc
Article #7426Re: Disabling DOS internal commands ?
From: Mika R Iisakkila
Date: Thu, 24 Jan 1991 11:47
Date: Thu, 24 Jan 1991 11:47
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1295 bytes
A.C.G.Saunders@newcastle.ac.uk (Aidan Saunders) writes: > Is there any way of disabling DOS internal commands ? Alternatively > can DOS be persuaded to execute a program of the same name as a DOS > internal command without explicitly specifying a path ? Use a binary editor and patch the command names in command.com into something else. You can't change the lenght of the command names, but changing 'copy' into 'ypoc' or something should fool the users for a while... The command name string arrays are near the end of command.com and easily found. You might probably want to patch a renamed copy of command.com and use the config.sys's SHELL command.
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!spool2.mu.edu!sdd.hp.com!usc!snorkelwacker.mit.edu!bloom-beacon!eru!hagbard!sunic!news.funet.fi!funic!santra!santra!iisakkil From: iisakkil@niksula.hut.fi (Mika R Iisakkila) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: Disabling DOS internal commands ? Message-ID: <IISAKKIL.91Jan24124743@colossus.hut.fi> Date: 24 Jan 91 11:47:42 GMT References: <1991Jan23.120842.3032@newcastle.ac.uk> Sender: news@santra.uucp (Cnews - USENET news system) Organization: Otaniemi Underground Broadcasting System Lines: 12 In-Reply-To: A.C.G.Saunders@newcastle.ac.uk's message of 23 Jan 91 12:08:42 GMT