From owner-freebsd-hackers  Mon Sep 18 00:50:35 1995
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.6.12/8.6.6) id AAA06691
          for hackers-outgoing; Mon, 18 Sep 1995 00:50:35 -0700
Received: from ref.tfs.com (ref.tfs.com [140.145.254.251])
          by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id AAA06686
          for <hackers@freebsd.org>; Mon, 18 Sep 1995 00:50:34 -0700
Received: (from julian@localhost) by ref.tfs.com (8.6.11/8.6.9) id AAA01170 for hackers@freebsd.org; Mon, 18 Sep 1995 00:50:32 -0700
From: Julian Elischer <julian@ref.tfs.com>
Message-Id: <199509180750.AAA01170@ref.tfs.com>
Subject: suspect code in 'unlink' syscall.
To: hackers@freebsd.org
Date: Mon, 18 Sep 1995 00:50:32 -0700 (PDT)
X-Mailer: ELM [version 2.4 PL24]
Content-Type: text
Content-Length: 701       
Sender: owner-hackers@freebsd.org
Precedence: bulk

looking at 'unlink (2)'
I see,
        if (vp->v_type != VDIR ||
            (error = suser(p->p_ucred, &p->p_acflag)) == 0) {
                /*
                 * The root of a mounted filesystem cannot be deleted.
                 */
                if (vp->v_flag & VROOT)
                        error = EBUSY;
                else
                        (void) vnode_pager_uncache(vp);
        }

I translate this as:
"if it's not a DIR, or we are root",
check if we are deleteing the 
root of an FS,
if not, flush cache......

now, if we were NOT root, and it IS a dir...... (normal...)

can we delete it?
I'm about to try this..
if you dont hear from me, the building exploded...

julian :)