Standard library sources?

Question

C++ / C#

Hello.

I understand that the question has been asked a million times, but I do not understand how to use the answers to it.
I'm trying to understand the connection of connect() with SIGALRM (does it exist at all?), for this I want to look at the source code of the function itself.

I go here
https://sourceware.org/git/?p=glibc.git;a=tree

And what I see in the connect.c file

int
__connect (int fd, __CONST_SOCKADDR_ARG addr, socklen_t len)
{
  __set_errno (ENOSYS);
  return -1;
}

What does it mean? Is this the whole function that establishes a connection with the server for us?

Tell me please. Give me the right path.

Answer 1

What does it mean? Is this the whole function that establishes a connection with the server for us?

This is a stub, in case there is no other implementation of this function.
For linux, there is another implementation, it is in sysdeps/unix/sysv/linux/connect.c, but all it does is a system call wrapped in a pthread-cancellation manipulation.
You can look at the implementation of the system call in the kernel. You can start here , this is the connect system call dispatcher. The connect implementation for TCP/IPv4 is here .

Answer 2

Sources of the standard library.