Re: Intercepting syscalls in glibc example

[Mike Frysinger <vapier at gentoo dot org>]

On Monday 09 February 2009 23:10:40 Tom Kraljevic wrote:
> Goal:  On an ubuntu system (release "hardy"), modify and build a glibc
> which intercepts syscalls.
>
> This example hijacks the write syscall and adds a proxy layer which
> allows the user to compute statistics, etc.  In my particular example,
> I am statically linking the program.

seems like a lot of effort for not a whole lot of gain.  why not use ptrace() 
instead ?  then you could do the same exact thing without requiring any glibc 
modification.
-mike

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