1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
35 __FBSDID("$FreeBSD$");
36
37 #include <sys/types.h>
38 #include "namespace.h"
39 #include <sys/acl.h>
40 #include "un-namespace.h"
41
42 #include <errno.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include "acl_support.h"
48
49 /*
50 * For POSIX.1e-semantic ACLs, do a presort so the kernel doesn't have to
51 * (the POSIX.1e semantic code will reject unsorted ACL submission). If it's
52 * not a semantic that the library knows about, just submit it flat and
53 * assume the caller knows what they're up to.
54 */
55 int
acl_set_file(const char * path_p,acl_type_t type,acl_t acl)56 acl_set_file(const char *path_p, acl_type_t type, acl_t acl)
57 {
58
59 if (acl == NULL || path_p == NULL) {
60 errno = EINVAL;
61 return (-1);
62 }
63 type = _acl_type_unold(type);
64 if (_acl_type_not_valid_for_acl(acl, type)) {
65 errno = EINVAL;
66 return (-1);
67 }
68 if (_posix1e_acl(acl, type))
69 _posix1e_acl_sort(acl);
70
71 acl->ats_cur_entry = 0;
72
73 return (__acl_set_file(path_p, type, &acl->ats_acl));
74 }
75
76 int
acl_set_link_np(const char * path_p,acl_type_t type,acl_t acl)77 acl_set_link_np(const char *path_p, acl_type_t type, acl_t acl)
78 {
79
80 if (acl == NULL || path_p == NULL) {
81 errno = EINVAL;
82 return (-1);
83 }
84 type = _acl_type_unold(type);
85 if (_acl_type_not_valid_for_acl(acl, type)) {
86 errno = EINVAL;
87 return (-1);
88 }
89 if (_posix1e_acl(acl, type))
90 _posix1e_acl_sort(acl);
91
92 acl->ats_cur_entry = 0;
93
94 return (__acl_set_link(path_p, type, &acl->ats_acl));
95 }
96
97 int
acl_set_fd(int fd,acl_t acl)98 acl_set_fd(int fd, acl_t acl)
99 {
100
101 if (fpathconf(fd, _PC_ACL_NFS4) == 1)
102 return (acl_set_fd_np(fd, acl, ACL_TYPE_NFS4));
103
104 return (acl_set_fd_np(fd, acl, ACL_TYPE_ACCESS));
105 }
106
107 int
acl_set_fd_np(int fd,acl_t acl,acl_type_t type)108 acl_set_fd_np(int fd, acl_t acl, acl_type_t type)
109 {
110
111 if (acl == NULL) {
112 errno = EINVAL;
113 return (-1);
114 }
115 type = _acl_type_unold(type);
116 if (_acl_type_not_valid_for_acl(acl, type)) {
117 errno = EINVAL;
118 return (-1);
119 }
120 if (_posix1e_acl(acl, type))
121 _posix1e_acl_sort(acl);
122
123 acl->ats_cur_entry = 0;
124
125 return (___acl_set_fd(fd, type, &acl->ats_acl));
126 }
127
128 /*
129 * acl_set_permset() (23.4.23): sets the permissions of ACL entry entry_d
130 * with the permissions in permset_d
131 */
132 int
acl_set_permset(acl_entry_t entry_d,acl_permset_t permset_d)133 acl_set_permset(acl_entry_t entry_d, acl_permset_t permset_d)
134 {
135
136 if (!entry_d) {
137 errno = EINVAL;
138 return (-1);
139 }
140
141 if ((*permset_d & ACL_POSIX1E_BITS) != *permset_d) {
142 if ((*permset_d & ACL_NFS4_PERM_BITS) != *permset_d) {
143 errno = EINVAL;
144 return (-1);
145 }
146 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
147 errno = EINVAL;
148 return (-1);
149 }
150 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
151 }
152
153 entry_d->ae_perm = *permset_d;
154
155 return (0);
156 }
157
158 /*
159 * acl_set_qualifier() sets the qualifier (ae_id) of the tag for
160 * ACL entry entry_d to the value referred to by tag_qualifier_p
161 */
162 int
acl_set_qualifier(acl_entry_t entry_d,const void * tag_qualifier_p)163 acl_set_qualifier(acl_entry_t entry_d, const void *tag_qualifier_p)
164 {
165
166 if (!entry_d || !tag_qualifier_p) {
167 errno = EINVAL;
168 return (-1);
169 }
170 switch(entry_d->ae_tag) {
171 case ACL_USER:
172 case ACL_GROUP:
173 entry_d->ae_id = *(uid_t *)tag_qualifier_p;
174 break;
175 default:
176 errno = EINVAL;
177 return (-1);
178 }
179
180 return (0);
181 }
182
183 /*
184 * acl_set_tag_type() sets the tag type for ACL entry entry_d to the
185 * value of tag_type
186 */
187 int
acl_set_tag_type(acl_entry_t entry_d,acl_tag_t tag_type)188 acl_set_tag_type(acl_entry_t entry_d, acl_tag_t tag_type)
189 {
190
191 if (entry_d == NULL) {
192 errno = EINVAL;
193 return (-1);
194 }
195
196 switch(tag_type) {
197 case ACL_OTHER:
198 case ACL_MASK:
199 if (!_entry_brand_may_be(entry_d, ACL_BRAND_POSIX)) {
200 errno = EINVAL;
201 return (-1);
202 }
203 _entry_brand_as(entry_d, ACL_BRAND_POSIX);
204 break;
205 case ACL_EVERYONE:
206 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
207 errno = EINVAL;
208 return (-1);
209 }
210 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
211 break;
212 }
213
214 switch(tag_type) {
215 case ACL_USER_OBJ:
216 case ACL_USER:
217 case ACL_GROUP_OBJ:
218 case ACL_GROUP:
219 case ACL_MASK:
220 case ACL_OTHER:
221 case ACL_EVERYONE:
222 entry_d->ae_tag = tag_type;
223 return (0);
224 }
225
226 errno = EINVAL;
227 return (-1);
228 }
229
230 int
acl_set_entry_type_np(acl_entry_t entry_d,acl_entry_type_t entry_type)231 acl_set_entry_type_np(acl_entry_t entry_d, acl_entry_type_t entry_type)
232 {
233
234 if (entry_d == NULL) {
235 errno = EINVAL;
236 return (-1);
237 }
238 if (!_entry_brand_may_be(entry_d, ACL_BRAND_NFS4)) {
239 errno = EINVAL;
240 return (-1);
241 }
242 _entry_brand_as(entry_d, ACL_BRAND_NFS4);
243
244 switch (entry_type) {
245 case ACL_ENTRY_TYPE_ALLOW:
246 case ACL_ENTRY_TYPE_DENY:
247 case ACL_ENTRY_TYPE_AUDIT:
248 case ACL_ENTRY_TYPE_ALARM:
249 entry_d->ae_entry_type = entry_type;
250 return (0);
251 }
252
253 errno = EINVAL;
254 return (-1);
255 }
256