1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* Copyright (c) 2001-2002 Chris D. Faulhaber
* All rights reserved.
*
* 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 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include "namespace.h"
#include <sys/acl.h>
#include "un-namespace.h"
#include <errno.h>
#include <string.h>
static int
_perm_is_invalid(acl_perm_t perm)
{
/* Check if more than a single bit is set. */
if ((perm & -perm) == perm &&
(perm & (ACL_POSIX1E_BITS | ACL_NFS4_PERM_BITS)) == perm)
return (0);
errno = EINVAL;
return (1);
}
/*
* acl_add_perm() (23.4.1): add the permission contained in perm to the
* permission set permset_d
*/
int
acl_add_perm(acl_permset_t permset_d, acl_perm_t perm)
{
if (permset_d == NULL) {
errno = EINVAL;
return (-1);
}
if (_perm_is_invalid(perm))
return (-1);
*permset_d |= perm;
return (0);
}
/*
* acl_clear_perms() (23.4.3): clear all permisions from the permission
* set permset_d
*/
int
acl_clear_perms(acl_permset_t permset_d)
{
if (permset_d == NULL) {
errno = EINVAL;
return (-1);
}
*permset_d = ACL_PERM_NONE;
return (0);
}
/*
* acl_delete_perm() (23.4.10): remove the permission in perm from the
* permission set permset_d
*/
int
acl_delete_perm(acl_permset_t permset_d, acl_perm_t perm)
{
if (permset_d == NULL) {
errno = EINVAL;
return (-1);
}
if (_perm_is_invalid(perm))
return (-1);
*permset_d &= ~perm;
return (0);
}
int
acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm)
{
if (permset_d == NULL) {
errno = EINVAL;
return (-1);
}
if (_perm_is_invalid(perm))
return (-1);
if (*permset_d & perm)
return (1);
return (0);
}
|
