ultrix man page for getpeername

getpeername(2)							System Calls Manual						    getpeername(2)

Name
       getpeername - get name of connected peer

Syntax
       #include <sys/types.h>
       #include <sys/socket.h>

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

Description
       The  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, in bytes, of the name returned.

Return Values
       A zero is returned if the call succeeds, and -1 is returned if it fails.

Restrictions
       Names bound to sockets in the UNIX domain are inaccessible; returns a zero length name.

Diagnostics
       The call succeeds unless:

       [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.

See Also
       bind(2), getsockname(2), socket(2)

																    getpeername(2)