From owner-cvs-all  Fri Sep 21 14:33:26 2001
Delivered-To: cvs-all@freebsd.org
Received: from freefall.freebsd.org (freefall.FreeBSD.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP
	id 24F1D37B408; Fri, 21 Sep 2001 14:33:23 -0700 (PDT)
Received: (from rwatson@localhost)
	by freefall.freebsd.org (8.11.4/8.11.4) id f8LLXNJ06986;
	Fri, 21 Sep 2001 14:33:23 -0700 (PDT)
	(envelope-from rwatson)
Message-Id: <200109212133.f8LLXNJ06986@freefall.freebsd.org>
From: Robert Watson <rwatson@FreeBSD.org>
Date: Fri, 21 Sep 2001 14:33:23 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern vfs_syscalls.c syscalls.master
X-FreeBSD-CVS-Branch: HEAD
Sender: owner-cvs-all@FreeBSD.ORG
Precedence: bulk
List-ID: <cvs-all.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20cvs-all>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20cvs-all>
X-Loop: FreeBSD.ORG

rwatson     2001/09/21 14:33:23 PDT

  Modified files:
    sys/kern             vfs_syscalls.c syscalls.master 
  Log:
  o Introduce eaccess(2), a version of access(2) that uses the effective
    credentials rather than the real credentials.  This is useful for
    implementing GUI's which need to modify icons based on access rights,
    but where use of open(2) is too expensive, use of stat(2) doesn't
    reflect the file system's real protection model, and use of
    access() suffers from real/effective credential confusion.  This
    implementation provides the same semantics as the call of the same
    name on SCO OpenServer.  Note: using this call improperly can
    leave you subject to some of the same races present in the
    access(2) call.
  o To implement this, break out the basic logic of access(2) into
    vpaccess(), which accepts a passed credential to perform the
    invocation of VOP_ACCESS().  Add eaccess(2) to invoke vpaccess(),
    and modify access(2) to use vpaccess().
  
  Obtained from:	TrustedBSD Project
  
  Revision  Changes    Path
  1.98      +2 -1      src/sys/kern/syscalls.master
  1.205     +68 -15    src/sys/kern/vfs_syscalls.c


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-all" in the body of the message