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Date: Mon, 6 Nov 2000 12:40:26 -0500 (EST)
From: Michael Vines <mjvines@undergrad.math.uwaterloo.ca>
To: Erik Mouw <J.A.K.Mouw@ITS.TUDelft.NL>
cc: Catalin BOIE <util@deuroconsult.ro>, linux-kernel@vger.kernel.org
Subject: Re: Kernel hook for open
In-Reply-To: <20001106182059.G12348@arthur.ubicom.tudelft.nl>
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On Mon, 6 Nov 2000, Erik Mouw wrote:

> On Mon, Nov 06, 2000 at 10:11:11AM -0500, Michael Vines wrote:
> > On Mon, 6 Nov 2000, Erik Mouw wrote:
> > > Use LD_PRELOAD instead.
> > 
> > You could also write a simple kernel module that replaces the open system
> > call.  See the Linux Kernel Module Programming Guide for details. 
> > http://www.linuxdoc.org/guides.html
> > 
> > specifically http://www.linuxdoc.org/LDP/lkmpg/node20.html
> 
> Why difficult when it can be done easy? To test the Y2K readiness of
> some programs (yeah, Y2K, remember?), I wrote a small library that
> overloaded the time() and gettimeofday() syscalls in about 100 lines of
> code.  No kernel modules needed, no root privileges needed, just set the
> environment variable LD_PRELOAD and off you go.

Well the question was posted to the kernel mailing list and not the glibc
mailing list after all :)

	Michael

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