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Jeff Sharkey9509d272012-08-07 17:56:30 -07001/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Jeff Sharkey9509d272012-08-07 17:56:30 -070017#include <cutils/multiuser.h>
Jeff Sharkeydff44702016-12-13 11:55:19 -070018#include <private/android_filesystem_config.h>
Jeff Sharkey9509d272012-08-07 17:56:30 -070019
Jeff Sharkey96851942012-08-27 15:03:37 -070020userid_t multiuser_get_user_id(uid_t uid) {
Jeff Sharkeydff44702016-12-13 11:55:19 -070021 return uid / AID_USER_OFFSET;
Jeff Sharkey9509d272012-08-07 17:56:30 -070022}
23
Jeff Sharkey96851942012-08-27 15:03:37 -070024appid_t multiuser_get_app_id(uid_t uid) {
Jeff Sharkeydff44702016-12-13 11:55:19 -070025 return uid % AID_USER_OFFSET;
Jeff Sharkey9509d272012-08-07 17:56:30 -070026}
27
Jeff Sharkeydff44702016-12-13 11:55:19 -070028uid_t multiuser_get_uid(userid_t user_id, appid_t app_id) {
29 return (user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET);
Jeff Sharkey9509d272012-08-07 17:56:30 -070030}
Calin Juravle807f23a2016-02-01 19:27:01 +000031
Jeff Sharkeydff44702016-12-13 11:55:19 -070032gid_t multiuser_get_cache_gid(userid_t user_id, appid_t app_id) {
33 if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
34 return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_CACHE_GID_START);
35 } else {
36 return -1;
37 }
38}
Calin Juravle807f23a2016-02-01 19:27:01 +000039
Jeff Sharkey7e5d0b12017-01-18 17:04:21 -070040gid_t multiuser_get_ext_gid(userid_t user_id, appid_t app_id) {
41 if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
42 return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_GID_START);
43 } else {
44 return -1;
45 }
46}
47
Jeff Sharkeydff44702016-12-13 11:55:19 -070048gid_t multiuser_get_shared_gid(userid_t user_id, appid_t app_id) {
49 if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
50 return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_SHARED_GID_START);
51 } else {
52 return -1;
53 }
54}
55
56gid_t multiuser_get_shared_app_gid(uid_t uid) {
57 return multiuser_get_shared_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
Calin Juravle807f23a2016-02-01 19:27:01 +000058}