2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008, 2009 Edward Tomasz NapieraĆa <trasz@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
36 #include "acl_support.h"
39 * An ugly detail of the implementation - fortunately not visible
40 * to the API users - is the "branding": libc needs to keep track
41 * of what "brand" ACL is: NFSv4, POSIX.1e or unknown. It happens
42 * automatically - for example, during acl_get_file(3) ACL gets
43 * branded according to the "type" argument; during acl_set_permset
44 * ACL, if its brand is unknown it gets branded as NFSv4 if any of the
45 * NFSv4 permissions that are not valid for POSIX.1e ACL are set etc.
46 * Branding information is used for printing out the ACL (acl_to_text(3)),
47 * veryfying acl_set_whatever arguments (checking against setting
48 * bits that are valid only for NFSv4 in ACL branded as POSIX.1e) etc.
52 entry2acl(acl_entry_t entry)
56 aclp = (acl_t)(((long)entry >> _ACL_T_ALIGNMENT_BITS) << _ACL_T_ALIGNMENT_BITS);
62 * Return brand of an ACL.
65 _acl_brand(const acl_t acl)
68 return (acl->ats_brand);
72 _entry_brand(const acl_entry_t entry)
75 return (_acl_brand(entry2acl(entry)));
79 * Return 1, iff branding ACL as "brand" is ok.
82 _acl_brand_may_be(const acl_t acl, int brand)
85 if (_acl_brand(acl) == ACL_BRAND_UNKNOWN)
88 if (_acl_brand(acl) == brand)
95 _entry_brand_may_be(const acl_entry_t entry, int brand)
98 return (_acl_brand_may_be(entry2acl(entry), brand));
102 * Brand ACL as "brand".
105 _acl_brand_as(acl_t acl, int brand)
108 assert(_acl_brand_may_be(acl, brand));
110 acl->ats_brand = brand;
114 _entry_brand_as(const acl_entry_t entry, int brand)
117 _acl_brand_as(entry2acl(entry), brand);
121 _acl_type_not_valid_for_acl(const acl_t acl, acl_type_t type)
124 switch (_acl_brand(acl)) {
126 if (type == ACL_TYPE_NFS4)
130 case ACL_BRAND_POSIX:
131 if (type == ACL_TYPE_ACCESS || type == ACL_TYPE_DEFAULT)
135 case ACL_BRAND_UNKNOWN:
143 _acl_brand_from_type(acl_t acl, acl_type_t type)
148 _acl_brand_as(acl, ACL_BRAND_NFS4);
150 case ACL_TYPE_ACCESS:
151 case ACL_TYPE_DEFAULT:
152 _acl_brand_as(acl, ACL_BRAND_POSIX);
155 /* XXX: What to do here? */
161 acl_get_brand_np(acl_t acl, int *brand_p)
164 if (acl == NULL || brand_p == NULL) {
168 *brand_p = _acl_brand(acl);