acl_entry.c revision 75928 
1/*
2 * Copyright (c) 2001 Chris D. Faulhaber
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libc/posix1e/acl_entry.c 75928 2001-04-24 22:45:41Z jedgar $
27 */
28
29#include <sys/types.h>
30#include "namespace.h"
31#include <sys/acl.h>
32#include "un-namespace.h"
33
34#include <errno.h>
35#include <stdlib.h>
36
37/*
38 * acl_create_entry() (23.4.7): create a new ACL entry in the ACL pointed
39 * to by acl_p.
40 */
41int
42acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
43{
44	struct acl *acl_int;
45
46	if (!acl_p) {
47		errno = EINVAL;
48		return -1;
49	}
50
51	acl_int = &(*acl_p)->ats_acl;
52
53	if ((acl_int->acl_cnt >= ACL_MAX_ENTRIES) || (acl_int->acl_cnt < 0)) {
54		errno = EINVAL;
55		return -1;
56	}
57
58	*entry_p = &acl_int->acl_entry[acl_int->acl_cnt++];
59
60	(**entry_p).ae_tag  = ACL_UNDEFINED_TAG;
61	(**entry_p).ae_id   = ACL_UNDEFINED_ID;
62	(**entry_p).ae_perm = ACL_PERM_NONE;
63
64	(*acl_p)->ats_cur_entry = 0;
65
66	return 0;
67}
68
69/*
70 * acl_get_entry() (23.4.14): returns an ACL entry from an ACL
71 * indicated by entry_id.
72 */
73int
74acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p)
75{
76	struct acl *acl_int;
77
78	if (!acl) {
79		errno = EINVAL;
80		return -1;
81	}
82	acl_int = &acl->ats_acl;
83
84	switch(entry_id) {
85	case ACL_FIRST_ENTRY:
86		acl->ats_cur_entry = 0;
87		/* PASSTHROUGH */
88	case ACL_NEXT_ENTRY:
89		if (acl->ats_cur_entry >= acl->ats_acl.acl_cnt)
90			return 0;
91		*entry_p = &acl_int->acl_entry[acl->ats_cur_entry++];
92		return 1;
93	}
94
95	errno = EINVAL;
96	return -1;
97}
98