El Tue, Nov 11, 2008 at 02:01:48PM +0530 sandeep lahane ha dit:
> If I am not missing anything and if there is libc wrapper provided
> for calls to be trapped then I think this can be done userspace.
> Just write the wrappers for calls to be trapped and and make a shared
> lib out of it, and then do
> a LD_PRELOAD of that lib, or add it to /etc/ld.so.preload.
>
> So it would look like this,
>
> app calls func -> func in your wrapper lib -> actual libc func or
> whatever you want to call from you lib.
> This way, you cal trap all calls like open/close etc CMIIW.
the solution you propose was my first thought, but i think it has a
flaw: the user himself could use LD_PRELOAD to circumvent the call to
the wrapper function
--
Matthias Kaehlcke
Embedded Linux Engineer
Barcelona
The assumption that what currently exists must necessarily
exist is the acid that corrodes all visionary thinking
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