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
|
/*-
* Copyright (c) 1999 Robert N. M. Watson
* 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 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.
*
* $FreeBSD$
*/
/*
* acl_calc_mask(): POSIX.1e routine to recalculate the mask value
*/
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/errno.h>
#include <string.h>
#include "acl_support.h"
/*
* POSIX.1e ACL semantics:
*
* acl_calc_mask(): calculate an ACL_MASK entry for the ACL, then either
* insert into the ACL if there is none already, or replace the existing
* one.
*/
int
acl_calc_mask(acl_t *acl_p)
{
acl_perm_t perm_union = ACL_PERM_NONE;
acl_t acl = *acl_p;
int mask_entry = -1;
int i;
if (!acl_posix1e(acl))
return (0);
/* search for ACL_MASK */
for (i = 0; i < acl->acl_cnt; i++)
if (acl->acl_entry[i].ae_tag == ACL_MASK)
mask_entry = i;
else
perm_union |= acl->acl_entry[i].ae_perm;
if (mask_entry != -1) {
/* already have a mask, replace */
acl->acl_entry[mask_entry].ae_perm = perm_union;
} else {
/* must add a new mask */
if (acl_add_entry(acl, ACL_MASK, 0, perm_union) == -1)
return (-1);
}
return (0);
}
|
