2 * Copyright (c) 2008, 2009 Edward Tomasz NapieraĆa <trasz@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
34 #include "acl_support.h"
37 * An ugly detail of the implementation - fortunately not visible
38 * to the API users - is the "branding": libc needs to keep track
39 * of what "brand" ACL is: NFSv4, POSIX.1e or unknown. It happens
40 * automatically - for example, during acl_get_file(3) ACL gets
41 * branded according to the "type" argument; during acl_set_permset
42 * ACL, if its brand is unknown it gets branded as NFSv4 if any of the
43 * NFSv4 permissions that are not valid for POSIX.1e ACL are set etc.
44 * Branding information is used for printing out the ACL (acl_to_text(3)),
45 * veryfying acl_set_whatever arguments (checking against setting
46 * bits that are valid only for NFSv4 in ACL branded as POSIX.1e) etc.
50 entry2acl(acl_entry_t entry)
54 aclp = (acl_t)(((long)entry >> _ACL_T_ALIGNMENT_BITS) << _ACL_T_ALIGNMENT_BITS);
60 * Return brand of an ACL.
63 _acl_brand(const acl_t acl)
66 return (acl->ats_brand);
70 _entry_brand(const acl_entry_t entry)
73 return (_acl_brand(entry2acl(entry)));
77 * Return 1, iff branding ACL as "brand" is ok.
80 _acl_brand_may_be(const acl_t acl, int brand)
83 if (_acl_brand(acl) == ACL_BRAND_UNKNOWN)
86 if (_acl_brand(acl) == brand)
93 _entry_brand_may_be(const acl_entry_t entry, int brand)
96 return (_acl_brand_may_be(entry2acl(entry), brand));
100 * Brand ACL as "brand".
103 _acl_brand_as(acl_t acl, int brand)
106 assert(_acl_brand_may_be(acl, brand));
108 acl->ats_brand = brand;
112 _entry_brand_as(const acl_entry_t entry, int brand)
115 _acl_brand_as(entry2acl(entry), brand);
119 _acl_type_not_valid_for_acl(const acl_t acl, acl_type_t type)
122 switch (_acl_brand(acl)) {
124 if (type == ACL_TYPE_NFS4)
128 case ACL_BRAND_POSIX:
129 if (type == ACL_TYPE_ACCESS || type == ACL_TYPE_DEFAULT)
133 case ACL_BRAND_UNKNOWN:
141 _acl_brand_from_type(acl_t acl, acl_type_t type)
146 _acl_brand_as(acl, ACL_BRAND_NFS4);
148 case ACL_TYPE_ACCESS:
149 case ACL_TYPE_DEFAULT:
150 _acl_brand_as(acl, ACL_BRAND_POSIX);
153 /* XXX: What to do here? */
159 acl_get_brand_np(acl_t acl, int *brand_p)
162 if (acl == NULL || brand_p == NULL) {
166 *brand_p = _acl_brand(acl);