1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 /*
31 * acl_set_file -- set a file/directory ACL by name
32 */
33
34 #include <sys/types.h>
35 #include "namespace.h"
36 #include <sys/acl.h>
37 #include "un-namespace.h"
38
39 #include <errno.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 #include "acl_support.h"
45
46 /*
47 * For POSIX.1e-semantic ACLs, do a presort so the kernel doesn't have to
48 * (the POSIX.1e semantic code will reject unsorted ACL submission). If it's
49 * not a semantic that the library knows about, just submit it flat and
50 * assume the caller knows what they're up to.
51 */
52 int
acl_set_file(const char * path_p,acl_type_t type,acl_t acl)53 acl_set_file(const char *path_p, acl_type_t type, acl_t acl)
54 {
55
56 if (acl == NULL || path_p == NULL) {
57 errno = EINVAL;
58 return (-1);
59 }
60 type = _acl_type_unold(type);
61 if (_acl_type_not_valid_for_acl(acl, type)) {
62 errno = EINVAL;
63 return (-1);
64 }
65 if (_posix1e_acl(acl, type))
66 _posix1e_acl_sort(acl);
67
68 acl->ats_cur_entry = 0;
69
70 return (__acl_set_file(path_p, type, &acl->ats_acl));
71 }
72
73 int
acl_set_link_np(const char * path_p,acl_type_t type,acl_t acl)74 acl_set_link_np(const char *path_p, acl_type_t type, acl_t acl)
75 {
76
77 if (acl == NULL || path_p == NULL) {
78 errno = EINVAL;
79 return (-1);
80 }
81 type = _acl_type_unold(type);
82 if (_acl_type_not_valid_for_acl(acl, type)) {
83 errno = EINVAL;
84 return (-1);
85 }
86 if (_posix1e_acl(acl, type))
87 _posix1e_acl_sort(acl);
88
89 acl->ats_cur_entry = 0;
90
91 return (__acl_set_link(path_p, type, &acl->ats_acl));
92 }
93
94 int
acl_set_fd(int fd,acl_t acl)95 acl_set_fd(int fd, acl_t acl)
96 {
97
98 if (fpathconf(fd, _PC_ACL_NFS4) == 1)
99 return (acl_set_fd_np(fd, acl, ACL_TYPE_NFS4));
100
101 return (acl_set_fd_np(fd, acl, ACL_TYPE_ACCESS));
102 }
103
104 int
acl_set_fd_np(int fd,acl_t acl,acl_type_t type)105 acl_set_fd_np(int fd, acl_t acl, acl_type_t type)
106 {
107
108 if (acl == NULL) {
109 errno = EINVAL;
110 return (-1);
111 }
112 type = _acl_type_unold(type);
113 if (_acl_type_not_valid_for_acl(acl, type)) {
114 errno = EINVAL;
115 return (-1);
116 }
117 if (_posix1e_acl(acl, type))
118 _posix1e_acl_sort(acl);
119
120 acl->ats_cur_entry = 0;
121
122 return (___acl_set_fd(fd, type, &acl->ats_acl));
123 }
124
125 /*
126 * acl_set_permset() (23.4.23): sets the permissions of ACL entry entry_d
127 * with the permissions in permset_d
128 */
129 int
acl_set_permset(acl_entry_t entry_d,acl_permset_t permset_d)130 acl_set_permset(acl_entry_t entry_d, acl_permset_t permset_d)
131 {
132
133 if (!entry_d) {
134 errno = EINVAL;
135 return (-1);
136 }
137
138 if ((*permset_d & ACL_POSIX1E_BITS) != *permset_d) {
139 if ((*permset_d & ACL_NFS4_PERM_BITS) != *permset_d) {
140 errno = EINVAL;
141 return (-1);
142 }
143 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
144 errno = EINVAL;
145 return (-1);
146 }
147 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
148 }
149
150 entry_d->ae_perm = *permset_d;
151
152 return (0);
153 }
154
155 /*
156 * acl_set_qualifier() sets the qualifier (ae_id) of the tag for
157 * ACL entry entry_d to the value referred to by tag_qualifier_p
158 */
159 int
acl_set_qualifier(acl_entry_t entry_d,const void * tag_qualifier_p)160 acl_set_qualifier(acl_entry_t entry_d, const void *tag_qualifier_p)
161 {
162
163 if (!entry_d || !tag_qualifier_p) {
164 errno = EINVAL;
165 return (-1);
166 }
167 switch(entry_d->ae_tag) {
168 case ACL_USER:
169 case ACL_GROUP:
170 entry_d->ae_id = *(uid_t *)tag_qualifier_p;
171 break;
172 default:
173 errno = EINVAL;
174 return (-1);
175 }
176
177 return (0);
178 }
179
180 /*
181 * acl_set_tag_type() sets the tag type for ACL entry entry_d to the
182 * value of tag_type
183 */
184 int
acl_set_tag_type(acl_entry_t entry_d,acl_tag_t tag_type)185 acl_set_tag_type(acl_entry_t entry_d, acl_tag_t tag_type)
186 {
187
188 if (entry_d == NULL) {
189 errno = EINVAL;
190 return (-1);
191 }
192
193 switch(tag_type) {
194 case ACL_OTHER:
195 case ACL_MASK:
196 if (!_entry_brand_may_be(entry_d, ACL_BRAND_POSIX)) {
197 errno = EINVAL;
198 return (-1);
199 }
200 _entry_brand_as(entry_d, ACL_BRAND_POSIX);
201 break;
202 case ACL_EVERYONE:
203 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
204 errno = EINVAL;
205 return (-1);
206 }
207 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
208 break;
209 }
210
211 switch(tag_type) {
212 case ACL_USER_OBJ:
213 case ACL_USER:
214 case ACL_GROUP_OBJ:
215 case ACL_GROUP:
216 case ACL_MASK:
217 case ACL_OTHER:
218 case ACL_EVERYONE:
219 entry_d->ae_tag = tag_type;
220 return (0);
221 }
222
223 errno = EINVAL;
224 return (-1);
225 }
226
227 int
acl_set_entry_type_np(acl_entry_t entry_d,acl_entry_type_t entry_type)228 acl_set_entry_type_np(acl_entry_t entry_d, acl_entry_type_t entry_type)
229 {
230
231 if (entry_d == NULL) {
232 errno = EINVAL;
233 return (-1);
234 }
235 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
236 errno = EINVAL;
237 return (-1);
238 }
239 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
240
241 switch (entry_type) {
242 case ACL_ENTRY_TYPE_ALLOW:
243 case ACL_ENTRY_TYPE_DENY:
244 case ACL_ENTRY_TYPE_AUDIT:
245 case ACL_ENTRY_TYPE_ALARM:
246 entry_d->ae_entry_type = entry_type;
247 return (0);
248 }
249
250 errno = EINVAL;
251 return (-1);
252 }
253