redhat man page for getsockname

GETSOCKNAME(2)						     Linux Programmer's Manual						    GETSOCKNAME(2)

NAME
       getsockname - get socket name

SYNOPSIS
       #include <sys/socket.h>

       int getsockname(int s, struct sockaddr *name, socklen_t *namelen);

DESCRIPTION
       Getsockname returns the current name for the specified socket.  The namelen parameter should be initialized to indicate the amount of space
       pointed to by name.  On return it contains the actual size of the name returned (in bytes).

RETURN VALUE
       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS
       EBADF  The argument s is not a valid descriptor.

       ENOTSOCK
	      The argument s is a file, not a socket.

       ENOBUFS
	      Insufficient resources were available in the system to perform the operation.

       EFAULT The name parameter points to memory not in a valid part of the process address space.

CONFORMING TO
       SVr4, 4.4BSD (the getsockname function call appeared in 4.2BSD).  SVr4 documents additional ENOMEM and ENOSR error codes.

NOTE
       The third argument of getsockname is in reality an `int *' (and this is what BSD 4.* and libc4  and  libc5  have).   Some  POSIX  confusion
       resulted  in the present socklen_t.  The draft standard has not been adopted yet, but glibc2 already follows it and also has socklen_t. See
       also accept(2).

SEE ALSO
       bind(2), socket(2)

BSD Man Page							    1993-07-24							    GETSOCKNAME(2)