glibc, glibc sockets

Hi all,
I have a couple questions:
1. Where exactly in the glibc soouce code are the functions for the
socket api found (It seems to me like everything in soxket/ is a
stub).
2. I have compiled and installed an older version of glibc (from 2.7
to 2.5.1) with the prefix=/usr. I see both libraries in /lib, and I
have run /sbin/ldconfig. But it seems like everything is still linked
up with the previous library that I have (for example the libc.so.6
and ld-linux.2.so still have symlinks to the 2.7, and not the 2.5.1 I
installed. How do I make the system aware of that.
[What I am trying to do is modify some socket functions in glibc and
install it, for a school class project].
Thanks,

On Mar 11, 9:20 pm, begin.middle....@gmail.com wrote:

> [What I am trying to do is modify some socket functions in glibc and
> install it, for a school class project].

The socket functions are just very thin wrappers around kernel calls.
If you want to trap/modify them, the best way is probably to do it in
your own library. Google for 'LD_PRELOAD' and 'RTLD_NEXT'.

On Mar 12, 12:43*pm, David Schwartz <dav...@webmaster.com> wrote:
> On Mar 11, 9:20 pm, begin.middle....@gmail.com wrote:
>
> > [What I am trying to do is modify some socket functions in glibc and
> > install it, for a school class project].
>
> The socket functions are just very thin wrappers around kernel calls.
> If you want to trap/modify them, the best way is probably to do it in
> your own library. Google for 'LD_PRELOAD' and 'RTLD_NEXT'.

Thank you. I will explore that option.