i am trying to find the select() source code (linux, i386 arch) in the glibc source code, but i cannot find anything (related to the said architecture)
Could anybod
mh's answer is pretty good, but I will try to be more specific:
select is Linux system call, not libc function. It's source code could be found here.
libc has only wrapper for calling (executing) linux system call. Wrapper for select syscall is created on the fly at build time, because select is in syscalls.list file.