acl_entry.c revision 192586 
1/*
2 * Copyright (c) 2001-2002 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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_entry.c 192586 2009-05-22 15:56:43Z trasz $");
29
30#include <sys/types.h>
31#include "namespace.h"
32#include <sys/acl.h>
33#include "un-namespace.h"
34
35#include <errno.h>
36#include <stdlib.h>
37
38/*
39 * acl_create_entry() (23.4.7): create a new ACL entry in the ACL pointed
40 * to by acl_p.
41 */
42int
43acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
44{
45	struct acl *acl_int;
46
47	if (acl_p == NULL) {
48		errno = EINVAL;
49		return (-1);
50	}
51
52	acl_int = &(*acl_p)->ats_acl;
53
54	if ((acl_int->acl_cnt >= ACL_MAX_ENTRIES) || (acl_int->acl_cnt < 0)) {
55		errno = EINVAL;
56		return (-1);
57	}
58
59	*entry_p = &acl_int->acl_entry[acl_int->acl_cnt++];
60
61	(**entry_p).ae_tag  = ACL_UNDEFINED_TAG;
62	(**entry_p).ae_id   = ACL_UNDEFINED_ID;
63	(**entry_p).ae_perm = ACL_PERM_NONE;
64	(**entry_p).ae_entry_type = 0;
65	(**entry_p).ae_flags = 0;
66
67	(*acl_p)->ats_cur_entry = 0;
68
69	return (0);
70}
71
72/*
73 * acl_get_entry() (23.4.14): returns an ACL entry from an ACL
74 * indicated by entry_id.
75 */
76int
77acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p)
78{
79	struct acl *acl_int;
80
81	if (acl == NULL) {
82		errno = EINVAL;
83		return (-1);
84	}
85	acl_int = &acl->ats_acl;
86
87	switch(entry_id) {
88	case ACL_FIRST_ENTRY:
89		acl->ats_cur_entry = 0;
90		/* PASSTHROUGH */
91	case ACL_NEXT_ENTRY:
92		if (acl->ats_cur_entry >= acl->ats_acl.acl_cnt)
93			return 0;
94		*entry_p = &acl_int->acl_entry[acl->ats_cur_entry++];
95		return (1);
96	}
97
98	errno = EINVAL;
99	return (-1);
100}
101