usr/src/sys/sys/un.h

/*
 * Copyright (c) 1982 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)un.h        6.3 (Berkeley) %G%
 */

/*
 * Definitions for UNIX IPC domain.
 */
struct  sockaddr_un {
        short   sun_family;             /* AF_UNIX */
        char    sun_path[108];          /* path name (gag) */
};

#ifdef KERNEL
int     unp_discard();
#endif