Re: (interposers): How to workaround the "strong symbols" problem?

In article <vmeibp$33sam$1@news.xmission.com>,
Kenny McCormack <gazelle@shell.xmission.com> wrote:

Context is Linux (and only Linux).
>
Over the years, I have written many "interposers" - that is, a shared
library loaded with LD_PRELOAD that hooks some system or library call
(e.g., "read").  The interposer usually ends up calling the "real"
function, then doing something special either before or after the call.

Also, wanted to state that the function I am trying to hook is "openat".

"open" I can hook, but "openat" doesn't work.  I think most programs just
call "open", which eventually ends up calling "openat", so that (hooking
"open") works.  But some programs call "openat" directly, and that doesn't
work.

And, also, just to clarify, the whole point of this is to modify the
behavior of a program without the bother of re-compiling it.

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