Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/sys/socket.h,v
retrieving revision 1.26.8.1
retrieving revision 1.27
diff -u -p -r1.26.8.1 -r1.27
--- src/sys/sys/socket.h	1998/11/10 04:21:22	1.26.8.1
+++ src/sys/sys/socket.h	1998/01/07 22:46:26	1.27
@@ -1,4 +1,4 @@
-/*	$NetBSD: socket.h,v 1.26.8.1 1998/11/10 04:21:22 cgd Exp $	*/
+/*	$NetBSD: socket.h,v 1.27 1998/01/07 22:46:26 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
@@ -189,6 +189,24 @@ struct sockproto {
 #define	PF_MAX		AF_MAX
 
 /*
+ * Socket credentials.
+ */
+struct sockcred {
+	uid_t	sc_uid;			/* real user id */
+	uid_t	sc_euid;		/* effective user id */
+	gid_t	sc_gid;			/* real group id */
+	gid_t	sc_egid;		/* effective group id */
+	int	sc_ngroups;		/* number of supplemental groups */
+	gid_t	sc_groups[1];		/* variable length */
+};
+
+/*
+ * Compute size of a sockcred structure with groups.
+ */
+#define	SOCKCREDSIZE(ngrps) \
+	(sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
+
+/*
  * Definitions for network related sysctl, CTL_NET.
  *
  * Second level is protocol family.
@@ -308,6 +326,7 @@ struct cmsghdr {
 /* "Socket"-level control message types: */
 #define	SCM_RIGHTS	0x01		/* access rights (array of int) */
 #define	SCM_TIMESTAMP	0x02		/* timestamp (struct timeval) */
+#define	SCM_CREDS	0x04		/* credientials (struct sockcred) */
 
 /*
  * 4.3 compat sockaddr, move to compat file later
@@ -355,7 +374,7 @@ int	socketpair __P((int, int, int, int *
 __END_DECLS
 #else
 # if defined(COMPAT_43) || defined(COMPAT_SUNOS) || defined(COMPAT_LINUX) || \
-     defined(COMPAT_HPUX) || defined(COMPAT_FREEBSD) || defined(COMPAT_ULTRIX)
+     defined(COMPAT_HPUX) || defined(COMPAT_FREEBSD)
 #  define COMPAT_OLDSOCK
 #  define MSG_COMPAT	0x8000
 # endif