Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754569AbaF3W2i (ORCPT ); Mon, 30 Jun 2014 18:28:38 -0400 Received: from mail-lb0-f172.google.com ([209.85.217.172]:52201 "EHLO mail-lb0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751333AbaF3W2g (ORCPT ); Mon, 30 Jun 2014 18:28:36 -0400 MIME-Version: 1.0 In-Reply-To: <1404124096-21445-17-git-send-email-drysdale@google.com> References: <1404124096-21445-1-git-send-email-drysdale@google.com> <1404124096-21445-17-git-send-email-drysdale@google.com> From: Andy Lutomirski Date: Mon, 30 Jun 2014 15:28:14 -0700 Message-ID: Subject: Re: [PATCH 5/5] man-pages: cap_rights_get: retrieve Capsicum fd rights To: David Drysdale Cc: LSM List , "linux-kernel@vger.kernel.org" , Greg Kroah-Hartman , Alexander Viro , Meredydd Luff , Kees Cook , James Morris , Linux API Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 30, 2014 at 3:28 AM, David Drysdale wrote: > Signed-off-by: David Drysdale > --- > man2/cap_rights_get.2 | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 126 insertions(+) > create mode 100644 man2/cap_rights_get.2 > > diff --git a/man2/cap_rights_get.2 b/man2/cap_rights_get.2 > new file mode 100644 > index 000000000000..966c0ed7e336 > --- /dev/null > +++ b/man2/cap_rights_get.2 > @@ -0,0 +1,126 @@ > +.\" > +.\" Copyright (c) 2008-2010 Robert N. M. Watson > +.\" Copyright (c) 2012-2013 The FreeBSD Foundation > +.\" Copyright (c) 2013-2014 Google, Inc. > +.\" All rights reserved. > +.\" > +.\" %%%LICENSE_START(BSD_2_CLAUSE) > +.\" Redistribution and use in source and binary forms, with or without > +.\" modification, are permitted provided that the following conditions > +.\" are met: > +.\" 1. Redistributions of source code must retain the above copyright > +.\" notice, this list of conditions and the following disclaimer. > +.\" 2. Redistributions in binary form must reproduce the above copyright > +.\" notice, this list of conditions and the following disclaimer in the > +.\" documentation and/or other materials provided with the distribution. > +.\" > +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND > +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE > +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE > +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE > +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL > +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS > +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) > +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT > +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY > +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF > +.\" SUCH DAMAGE. > +.\" %%%LICENSE_END > +.\" > +.TH CAP_RIGHTS_GET 2 2014-05-07 "Linux" "Linux Programmer's Manual" > +.SH NAME > +cap_rights_get \- retrieve Capsicum capability rights > +.SH SYNOPSIS > +.nf > +.B #include > +.sp > +.BI "int cap_rights_get(int " fd ", struct cap_rights *" rights , > +.BI " unsigned int *" fcntls , > +.BI " int *" nioctls ", unsigned int *" ioctls ); > +.SH DESCRIPTION > +Obtain the current Capsicum capability rights for a file descriptor. > +.PP > +The function will fill the > +.I rights > +argument (if non-NULL) with the primary capability rights of the > +.I fd > +descriptor. The result can be examined with the > +.BR cap_rights_is_set (3) > +family of functions. The complete list of primary rights can be found in the > +.BR rights (7) > +manual page. > +.PP > +If the > +.I fcntls > +argument is non-NULL, it will be filled in with a bitmask of allowed > +.BR fcntl (2) > +commands; see > +.BR cap_rights_limit (2) > +for values. If the file descriptor does not have the > +.B CAP_FCNTL > +primary right, the returned > +.I fcntls > +value will be zero. > +.PP > +If the > +.I nioctls > +argument is non-NULL, it will be filled in with the number of allowed > +.BR ioctl (2) > +commands, or with the value CAP_IOCTLS_ALL to indicate that all > +.BR ioctl (2) > +commands are allowed. If the file descriptor does not have the > +.B CAP_IOCTL > +primary right, the returned > +.I nioctls > +value will be zero. > +.PP > +The > +.I ioctls > +argument (if non-NULL) should point at memory that can hold up to > +.I nioctls > +values. > +The system call populates the provided buffer with up to > +.I nioctls > +elements, but always returns the total number of I assume you mean "up to the initial value of *nioctls elements" or something. Can you clarify? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/