Search:

http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz

Download it...decompress it...look at what's inside

Did you try libc? There are C versions of the functions you mentioned in the download

That code is usually pre-compiled and linked in a shared library by the time you get to use it so you cant jump to it unless you are prepared to read it in assembler.

Try have a look at libc (GNU...