1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <cutils/multiuser.h>
#include <private/android_filesystem_config.h>
userid_t multiuser_get_user_id(uid_t uid) {
return uid / AID_USER_OFFSET;
}
appid_t multiuser_get_app_id(uid_t uid) {
return uid % AID_USER_OFFSET;
}
uid_t multiuser_get_uid(userid_t user_id, appid_t app_id) {
return (user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET);
}
gid_t multiuser_get_cache_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_CACHE_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_ext_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_ext_cache_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_CACHE_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_shared_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_SHARED_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_shared_app_gid(uid_t uid) {
return multiuser_get_shared_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
}
|
