1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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
26 * SUCH DAMAGE.
27 */
28 /*
29 * acl_init -- return a fresh acl structure
30 * acl_dup -- duplicate an acl and return the new copy
31 */
32
33 #include <sys/types.h>
34 #include "namespace.h"
35 #include <sys/acl.h>
36 #include "un-namespace.h"
37 #include <errno.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <assert.h>
41
42 #include "acl_support.h"
43
44 #ifndef CTASSERT
45 #define CTASSERT(x) _CTASSERT(x, __LINE__)
46 #define _CTASSERT(x, y) __CTASSERT(x, y)
47 #define __CTASSERT(x, y) typedef char __assert_ ## y [(x) ? 1 : -1]
48 #endif
49
50 CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct));
51
52 acl_t
acl_init(int count)53 acl_init(int count)
54 {
55 int error;
56 acl_t acl;
57
58 if (count > ACL_MAX_ENTRIES) {
59 errno = ENOMEM;
60 return (NULL);
61 }
62 if (count < 0) {
63 errno = EINVAL;
64 return (NULL);
65 }
66
67 error = posix_memalign((void *)&acl, 1 << _ACL_T_ALIGNMENT_BITS,
68 sizeof(struct acl_t_struct));
69 if (error) {
70 errno = error;
71 return (NULL);
72 }
73
74 bzero(acl, sizeof(struct acl_t_struct));
75 acl->ats_brand = ACL_BRAND_UNKNOWN;
76 acl->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
77
78 return (acl);
79 }
80
81 acl_t
acl_dup(acl_t acl)82 acl_dup(acl_t acl)
83 {
84 acl_t acl_new;
85
86 acl_new = acl_init(ACL_MAX_ENTRIES);
87 if (acl_new != NULL) {
88 *acl_new = *acl;
89 acl->ats_cur_entry = 0;
90 acl_new->ats_cur_entry = 0;
91 }
92
93 return (acl_new);
94 }
95