K&R Style Function Definition

I first met this kind of old function prototype here(glibc/socket.c).

24 int

25 __socket (domain, type, protocol)

26             int domain;

27             int type;

28             int protocol;

29 {

30  __set_errno (ENOSYS);

31  return -1;

32 }

Notice the parameters domain,type and protocol are defined outside of the parenthesizes.

Actually it is a old style function prototype, though it is still widely seen in kernel code.

It is also known as pre-ISO function definition.