1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
34#if 0
35__FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_init.c 326193 2017-11-25 17:12:48Z pfg $");
36#else
37__RCSID("$NetBSD: acl_init.c,v 1.1 2020/05/16 18:31:47 christos Exp $");
38#endif
39
40#include "namespace.h"
41#include <sys/types.h>
42#include <sys/acl.h>
43#include <errno.h>
44#include <stdlib.h>
45#include <string.h>
46#include <assert.h>
47
48#include "acl_support.h"
49
50__CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct));
51
52acl_t
53acl_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
81acl_t
82acl_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