redhat man page for getpeername

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

NAME
       getpeername - get name of connected peer socket

SYNOPSIS
       #include <sys/socket.h>

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

DESCRIPTION
       Getpeername  returns  the  name	of  the peer connected to socket s.  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).  The name is truncated if the buffer pro-
       vided is too small.

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.

       ENOTCONN
	      The socket is not connected.

       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 getpeername function call first appeared in 4.2BSD).

NOTE
       The  third  argument  of  getpeername  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
       accept(2), bind(2), getsockname(2)

BSD Man Page							    1993-07-30							    GETPEERNAME(2)