where to find select() source code in glibc source?

Question

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 anybody point me to the select() source code ?

Answer 1

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.

Answer 2

select() is not a function of the libc, but a kernel function, so you need to take a look into the kernel source.

You can tell this by looking into the man page: If it is in section 2, it's a kernel function, if it's in section 3, it's a function of the standard C library, in your case the glibc.

Edit: Like some other people remarked correctly (thank you!), a function described in section 2 is officially called a system call and it is actually a call to a library that wraps the operating system's actual call interface.