1 /*
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 
17 #include <cutils/multiuser.h>
18 
multiuser_get_user_id(uid_t uid)19 userid_t multiuser_get_user_id(uid_t uid) {
20     return uid / MULTIUSER_APP_PER_USER_RANGE;
21 }
22 
multiuser_get_app_id(uid_t uid)23 appid_t multiuser_get_app_id(uid_t uid) {
24     return uid % MULTIUSER_APP_PER_USER_RANGE;
25 }
26 
multiuser_get_uid(userid_t userId,appid_t appId)27 uid_t multiuser_get_uid(userid_t userId, appid_t appId) {
28     return userId * MULTIUSER_APP_PER_USER_RANGE + (appId % MULTIUSER_APP_PER_USER_RANGE);
29 }
30 
multiuser_get_shared_app_gid(uid_t id)31 appid_t multiuser_get_shared_app_gid(uid_t id) {
32   return MULTIUSER_FIRST_SHARED_APPLICATION_GID + (id % MULTIUSER_APP_PER_USER_RANGE)
33           - MULTIUSER_FIRST_APPLICATION_UID;
34 
35 }
36