acl_valid.c revision 108410 
1/*-
2 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by Robert Watson for the TrustedBSD Project.
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_valid -- POSIX.1e ACL check routine
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD: head/lib/libc/posix1e/acl_valid.c 108410 2002-12-29 20:47:05Z rwatson $");
34
35#include <sys/types.h>
36#include "namespace.h"
37#include <sys/acl.h>
38#include "un-namespace.h"
39#include <sys/errno.h>
40#include <stdlib.h>
41
42#include "acl_support.h"
43
44/*
45 * acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
46 * and errno set to EINVAL.
47 *
48 * Implemented by calling the acl_check routine in acl_support, which
49 * requires ordering.  We call acl_support's _posix1e_acl_sort to make this
50 * true.  POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
51 *
52 * This call is deprecated, as it doesn't ask whether the ACL is valid
53 * for a particular target.  However, this call is standardized, unlike
54 * the other two forms.
55 */
56int
57acl_valid(acl_t acl)
58{
59	int	error;
60
61	if (acl == NULL) {
62		errno = EINVAL;
63		return (-1);
64	}
65	_posix1e_acl_sort(acl);
66	error = _posix1e_acl_check(acl);
67	if (error) {
68		errno = error;
69		return (-1);
70	} else {
71		return (0);
72	}
73}
74
75int
76acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
77{
78	int	error;
79
80	if (pathp == NULL || acl == NULL) {
81		errno = EINVAL;
82		return (-1);
83	}
84	if (_posix1e_acl(acl, type)) {
85		error = _posix1e_acl_sort(acl);
86		if (error) {
87			errno = error;
88			return (-1);
89		}
90	}
91
92	return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
93}
94
95int
96acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
97{
98	int	error;
99
100	if (pathp == NULL || acl == NULL) {
101		errno = EINVAL;
102		return (-1);
103	}
104	if (_posix1e_acl(acl, type)) {
105		error = _posix1e_acl_sort(acl);
106		if (error) {
107			errno = error;
108			return (-1);
109		}
110	}
111
112	return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
113}
114
115int
116acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
117{
118	int	error;
119
120	if (acl == NULL) {
121		errno = EINVAL;
122		return (-1);
123	}
124	if (_posix1e_acl(acl, type)) {
125		error = _posix1e_acl_sort(acl);
126		if (error) {
127			errno = error;
128			return (-1);
129		}
130	}
131
132	acl->ats_cur_entry = 0;
133
134
135	return (___acl_aclcheck_fd(fd, type, &acl->ats_acl));
136}
137