Messages in this thread | | | Date | Tue, 12 Feb 2002 10:56:17 +0200 (IST) | From | mulix <> | Subject | Re: faking time |
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On Tue, 12 Feb 2002, Andreas Ferber wrote:
> On Mon, Feb 11, 2002 at 10:47:23PM -0500, Theodore Tso wrote: > > > > Here's an LD_PRELOAD shared library that will do the trick... just > > export the environment variable FAKETIME with the time that you'd > > like, and then export the LD_PRELOAD environment variable to point > > that the faketime.so library, and then execute your program. All > > programs that have these two environment variables set will have their > > time faked out accordingly. > > But note that this doesn't work with programs linked statically. If > you must fool one of those, ptrace() is the only way to do it without > some sort of kernel patch or module I think.
luckily, someone wrote such a kernel module - syscalltrack, http://syscalltrack.sf.net.
it's in alpha stages right now, but it seems pretty stable so far (It Works For Me - i run it regularly on all of my machines). note that we currently support only logging system calls (a-la strace) and failing them with a user given parameter- rewriting system call parameters will require additional hackery, but not too much of it - on the order of one day of work. volunteers are welcome. -- mulix
http://vipe.technion.ac.il/~mulix/ http://syscalltrack.sf.net/
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