d915a14ef0
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
172 lines
3.9 KiB
C
172 lines
3.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <errno.h>
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#include <sys/acl.h>
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#include "acl_support.h"
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/*
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* An ugly detail of the implementation - fortunately not visible
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* to the API users - is the "branding": libc needs to keep track
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* of what "brand" ACL is: NFSv4, POSIX.1e or unknown. It happens
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* automatically - for example, during acl_get_file(3) ACL gets
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* branded according to the "type" argument; during acl_set_permset
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* ACL, if its brand is unknown it gets branded as NFSv4 if any of the
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* NFSv4 permissions that are not valid for POSIX.1e ACL are set etc.
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* Branding information is used for printing out the ACL (acl_to_text(3)),
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* veryfying acl_set_whatever arguments (checking against setting
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* bits that are valid only for NFSv4 in ACL branded as POSIX.1e) etc.
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*/
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static acl_t
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entry2acl(acl_entry_t entry)
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{
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acl_t aclp;
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aclp = (acl_t)(((long)entry >> _ACL_T_ALIGNMENT_BITS) << _ACL_T_ALIGNMENT_BITS);
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return (aclp);
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}
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/*
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* Return brand of an ACL.
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*/
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int
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_acl_brand(const acl_t acl)
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{
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return (acl->ats_brand);
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}
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int
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_entry_brand(const acl_entry_t entry)
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{
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return (_acl_brand(entry2acl(entry)));
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}
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/*
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* Return 1, iff branding ACL as "brand" is ok.
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*/
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int
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_acl_brand_may_be(const acl_t acl, int brand)
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{
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if (_acl_brand(acl) == ACL_BRAND_UNKNOWN)
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return (1);
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if (_acl_brand(acl) == brand)
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return (1);
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return (0);
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}
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int
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_entry_brand_may_be(const acl_entry_t entry, int brand)
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{
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return (_acl_brand_may_be(entry2acl(entry), brand));
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}
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/*
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* Brand ACL as "brand".
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*/
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void
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_acl_brand_as(acl_t acl, int brand)
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{
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assert(_acl_brand_may_be(acl, brand));
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acl->ats_brand = brand;
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}
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void
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_entry_brand_as(const acl_entry_t entry, int brand)
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{
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_acl_brand_as(entry2acl(entry), brand);
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}
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int
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_acl_type_not_valid_for_acl(const acl_t acl, acl_type_t type)
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{
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switch (_acl_brand(acl)) {
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case ACL_BRAND_NFS4:
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if (type == ACL_TYPE_NFS4)
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return (0);
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break;
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case ACL_BRAND_POSIX:
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if (type == ACL_TYPE_ACCESS || type == ACL_TYPE_DEFAULT)
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return (0);
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break;
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case ACL_BRAND_UNKNOWN:
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return (0);
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}
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return (-1);
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}
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void
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_acl_brand_from_type(acl_t acl, acl_type_t type)
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{
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switch (type) {
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case ACL_TYPE_NFS4:
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_acl_brand_as(acl, ACL_BRAND_NFS4);
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break;
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case ACL_TYPE_ACCESS:
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case ACL_TYPE_DEFAULT:
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_acl_brand_as(acl, ACL_BRAND_POSIX);
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break;
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default:
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/* XXX: What to do here? */
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break;
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}
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}
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int
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acl_get_brand_np(acl_t acl, int *brand_p)
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{
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if (acl == NULL || brand_p == NULL) {
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errno = EINVAL;
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return (-1);
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}
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*brand_p = _acl_brand(acl);
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return (0);
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}
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