Some other Unix operating systems had the functions in a own socket library, e.g. SunOS: https://docs.oracle.com/cd/E19120-01/open.solaris/817-4415/sockets-8588

Some other Unix operating systems had the functions in a own socket library, e.g. SunOS: https://docs.oracle.com/cd/E19120-01/open.solaris/817-4415/sockets-85885/index.html https://docs.oracle.com/cd/E19120-01/open.solaris/817-4415/s... . I suppose though in the context of Linux it's a bit weird, but you did get the correct meaning :).