From a174a13af3f3ab7c4603e7530a5089069d6aef33 Mon Sep 17 00:00:00 2001
From: guido <guido@FreeBSD.org>
Date: Mon, 24 Feb 1997 20:32:24 +0000
Subject: When group wheel is empty, allow everyone to su to root. This has
 normally no conseqeunces as we ship with a non-empty wheel.

Closes PR/1882
Submitted by:	Arne Henrik Juul <arnej@frida.imf.unit.no>
---
 usr.bin/su/su.1 | 7 ++++---
 usr.bin/su/su.c | 5 +++--
 2 files changed, 7 insertions(+), 5 deletions(-)

(limited to 'usr.bin/su')

diff --git a/usr.bin/su/su.1 b/usr.bin/su/su.1
index f7c6e74..0c60ec7 100644
--- a/usr.bin/su/su.1
+++ b/usr.bin/su/su.1
@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"	@(#)su.1	8.2 (Berkeley) 4/18/94
-.\"	$Id$
+.\"	$Id: su.1,v 1.7 1997/02/22 19:57:15 peter Exp $
 .\"
 .\" this is for hilit19's braindeadness: "
 .Dd April 18, 1994
@@ -149,12 +149,13 @@ option as understood by most shells.  Note that
 usually expects a single argument only; you have to quote it when
 passing multiple words.
 .Pp
-Only users in group 0 (normally
+Only users listed in group 0 (normally
 .Dq wheel )
 can
 .Nm su
 to
-.Dq root .
+.Dq root ,
+unless this group is empty.
 .Pp
 By default (unless the prompt is reset by a startup file) the super-user
 prompt is set to
diff --git a/usr.bin/su/su.c b/usr.bin/su/su.c
index 210c3ae..fa4f02a 100644
--- a/usr.bin/su/su.c
+++ b/usr.bin/su/su.c
@@ -42,7 +42,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)su.c	8.3 (Berkeley) 4/2/94";
 */
 static const char rcsid[] =
-	"$Id: su.c,v 1.15 1997/01/13 06:39:19 davidn Exp $";
+	"$Id: su.c,v 1.17 1997/01/14 09:24:09 davidn Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -223,7 +223,8 @@ main(argc, argv)
 #endif
 		{
 			/* only allow those in group zero to su to root. */
-			if (pwd->pw_uid == 0 && (gr = getgrgid((gid_t)0)))
+			if (pwd->pw_uid == 0 && (gr = getgrgid((gid_t)0)) &&
+			    gr->gr_mem && *(gr->gr_mem))
 				for (g = gr->gr_mem;; ++g) {
 					if (!*g)
 						errx(1,
-- 
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