1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright (c) 1993-1997 by Sun Microsystems, Inc.
24 * All rights reserved
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28/* LINTLIBRARY */
29
30/*
31 * Convert ACL to/from permission bits
32 */
33
34#include <errno.h>
35#include <sys/acl.h>
36
37int
38acltomode(aclent_t *aclbufp, int nentries, mode_t *modep)
39{
40	aclent_t		*tp;
41	unsigned long		mode;
42	unsigned long		grpmode;
43	unsigned long		mask;
44	int			which;
45	int			got_mask = 0;
46
47	*modep = 0;
48	if (aclcheck(aclbufp, nentries, &which) != 0) {
49		errno = EINVAL;
50		return (-1);	/* errno is set in aclcheck() */
51	}
52	for (tp = aclbufp; nentries--; tp++) {
53		if (tp->a_type == USER_OBJ) {
54			mode = tp->a_perm;
55			if (mode > 07)
56				return (-1);
57			*modep |= (mode << 6);
58			continue;
59		}
60		if (tp->a_type == GROUP_OBJ) {
61			grpmode = tp->a_perm;
62			if (grpmode > 07)
63				return (-1);
64			continue;
65		}
66		if (tp->a_type == CLASS_OBJ) {
67			got_mask = 1;
68			mask = tp->a_perm;
69			if (mask > 07)
70				return (-1);
71			*modep |= (mask << 3);
72			continue;
73		}
74		if (tp->a_type == OTHER_OBJ) {
75			mode = tp->a_perm;
76			if (mode > 07)
77				return (-1);
78			*modep |= mode;
79			continue; /* we may break here if it is sorted */
80		}
81	}
82	if (!got_mask)
83		*modep |= (grpmode << 3);
84	return (0);
85}
86
87
88int
89aclfrommode(aclent_t *aclbufp, int nentries, mode_t *modep)
90{
91	aclent_t		*tp;
92	aclent_t		*savp;
93	mode_t 			mode;
94	mode_t 			grpmode;
95	int			which;
96	int			got_mask = 0;
97
98	if (aclcheck(aclbufp, nentries, &which) != 0) {
99		errno = EINVAL;
100		return (-1);	/* errno is set in aclcheck() */
101	}
102	for (tp = aclbufp; nentries--; tp++) {
103		if (tp->a_type == USER_OBJ) {
104			mode = (*modep & 0700);
105			tp->a_perm = (mode >> 6);
106			continue;
107		}
108		if (tp->a_type == GROUP_OBJ) {
109			grpmode = (*modep & 070);
110			savp = tp;
111			continue;
112		}
113		if (tp->a_type == CLASS_OBJ) {
114			got_mask = 1;
115			mode = (*modep & 070);
116			tp->a_perm = (mode >> 3);
117			continue;
118		}
119		if (tp->a_type == OTHER_OBJ) {
120			mode = (*modep & 07);
121			tp->a_perm = (o_mode_t)mode;
122			continue; /* we may break here if it is sorted */
123		}
124	}
125	if (!got_mask)
126		savp->a_perm = (grpmode >> 3);
127	return (0);
128}
129