Article View: comp.os.msdos.programmer
Article #7259How can a TSR detect if it has been installed?
From: sorrow
Date: Sat, 22 Jun 1991 20:57
Date: Sat, 22 Jun 1991 20:57
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1405 bytes
I have written a TSR that takes over the command line input for INT21H, in other words an INT21H replacement. How can it prevent itself from being re-installed? I know programs such as NORTON SI will show you who "owns" an interrupt, and my program comes up as the owner. If there was a way to see if the owner was NOT DOS (i.e. another program, such as a TSR, owned it) and to not install itself in that case, I would like to know. Thanks, Brian /* Brian Hook -- MS-DOS Programmer for Contract ----------------------------------------------------------------- "Seamus, that's my dog...I saw her today at the reception...sorry, sixTEEN inches....better save the women and children first...but this one goes to 11! ..anymore of that plutonium nyborg?....there can be only ONE!....like a finger pointing to the moon....ease the seat back...one day closer to death */
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!eng.ufl.edu!math.ufl.edu!uflorida!SORROW@MAPLE.CIRCA.UFL.EDU From: sorrow@oak.circa.ufl.edu Newsgroups: comp.os.msdos.programmer Subject: How can a TSR detect if it has been installed? Message-ID: <0094A83A.9AE8E1A0@MAPLE.CIRCA.UFL.EDU> Date: 22 Jun 91 20:57:01 GMT Sender: news@uflorida.cis.ufl.EDU Reply-To: sorrow@oak.circa.ufl.edu Organization: University of Florida CIRCA VAX Cluster Lines: 20