1*9aa2a9c3Schristos /*-
2*9aa2a9c3Schristos * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3*9aa2a9c3Schristos *
4*9aa2a9c3Schristos * Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
5*9aa2a9c3Schristos * All rights reserved.
6*9aa2a9c3Schristos *
7*9aa2a9c3Schristos * Redistribution and use in source and binary forms, with or without
8*9aa2a9c3Schristos * modification, are permitted provided that the following conditions
9*9aa2a9c3Schristos * are met:
10*9aa2a9c3Schristos * 1. Redistributions of source code must retain the above copyright
11*9aa2a9c3Schristos * notice, this list of conditions and the following disclaimer.
12*9aa2a9c3Schristos * 2. Redistributions in binary form must reproduce the above copyright
13*9aa2a9c3Schristos * notice, this list of conditions and the following disclaimer in the
14*9aa2a9c3Schristos * documentation and/or other materials provided with the distribution.
15*9aa2a9c3Schristos *
16*9aa2a9c3Schristos * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17*9aa2a9c3Schristos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18*9aa2a9c3Schristos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19*9aa2a9c3Schristos * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20*9aa2a9c3Schristos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21*9aa2a9c3Schristos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22*9aa2a9c3Schristos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23*9aa2a9c3Schristos * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24*9aa2a9c3Schristos * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*9aa2a9c3Schristos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*9aa2a9c3Schristos * SUCH DAMAGE.
27*9aa2a9c3Schristos */
28*9aa2a9c3Schristos /*
29*9aa2a9c3Schristos * acl_init -- return a fresh acl structure
30*9aa2a9c3Schristos * acl_dup -- duplicate an acl and return the new copy
31*9aa2a9c3Schristos */
32*9aa2a9c3Schristos
33*9aa2a9c3Schristos #include <sys/cdefs.h>
34*9aa2a9c3Schristos #if 0
35*9aa2a9c3Schristos __FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_init.c 326193 2017-11-25 17:12:48Z pfg $");
36*9aa2a9c3Schristos #else
37*9aa2a9c3Schristos __RCSID("$NetBSD: acl_init.c,v 1.1 2020/05/16 18:31:47 christos Exp $");
38*9aa2a9c3Schristos #endif
39*9aa2a9c3Schristos
40*9aa2a9c3Schristos #include "namespace.h"
41*9aa2a9c3Schristos #include <sys/types.h>
42*9aa2a9c3Schristos #include <sys/acl.h>
43*9aa2a9c3Schristos #include <errno.h>
44*9aa2a9c3Schristos #include <stdlib.h>
45*9aa2a9c3Schristos #include <string.h>
46*9aa2a9c3Schristos #include <assert.h>
47*9aa2a9c3Schristos
48*9aa2a9c3Schristos #include "acl_support.h"
49*9aa2a9c3Schristos
50*9aa2a9c3Schristos __CTASSERT(1 << _ACL_T_ALIGNMENT_BITS > sizeof(struct acl_t_struct));
51*9aa2a9c3Schristos
52*9aa2a9c3Schristos acl_t
acl_init(int count)53*9aa2a9c3Schristos acl_init(int count)
54*9aa2a9c3Schristos {
55*9aa2a9c3Schristos int error;
56*9aa2a9c3Schristos acl_t acl;
57*9aa2a9c3Schristos
58*9aa2a9c3Schristos if (count > ACL_MAX_ENTRIES) {
59*9aa2a9c3Schristos errno = ENOMEM;
60*9aa2a9c3Schristos return (NULL);
61*9aa2a9c3Schristos }
62*9aa2a9c3Schristos if (count < 0) {
63*9aa2a9c3Schristos errno = EINVAL;
64*9aa2a9c3Schristos return (NULL);
65*9aa2a9c3Schristos }
66*9aa2a9c3Schristos
67*9aa2a9c3Schristos error = posix_memalign((void *)&acl, 1 << _ACL_T_ALIGNMENT_BITS,
68*9aa2a9c3Schristos sizeof(struct acl_t_struct));
69*9aa2a9c3Schristos if (error) {
70*9aa2a9c3Schristos errno = error;
71*9aa2a9c3Schristos return (NULL);
72*9aa2a9c3Schristos }
73*9aa2a9c3Schristos
74*9aa2a9c3Schristos bzero(acl, sizeof(struct acl_t_struct));
75*9aa2a9c3Schristos acl->ats_brand = ACL_BRAND_UNKNOWN;
76*9aa2a9c3Schristos acl->ats_acl.acl_maxcnt = ACL_MAX_ENTRIES;
77*9aa2a9c3Schristos
78*9aa2a9c3Schristos return (acl);
79*9aa2a9c3Schristos }
80*9aa2a9c3Schristos
81*9aa2a9c3Schristos acl_t
acl_dup(acl_t acl)82*9aa2a9c3Schristos acl_dup(acl_t acl)
83*9aa2a9c3Schristos {
84*9aa2a9c3Schristos acl_t acl_new;
85*9aa2a9c3Schristos
86*9aa2a9c3Schristos acl_new = acl_init(ACL_MAX_ENTRIES);
87*9aa2a9c3Schristos if (acl_new != NULL) {
88*9aa2a9c3Schristos *acl_new = *acl;
89*9aa2a9c3Schristos acl->ats_cur_entry = 0;
90*9aa2a9c3Schristos acl_new->ats_cur_entry = 0;
91*9aa2a9c3Schristos }
92*9aa2a9c3Schristos
93*9aa2a9c3Schristos return (acl_new);
94*9aa2a9c3Schristos }
95