1 /*
2  * Copyright (C) 2018 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 package com.android.server.backup;
18 
19 import android.os.Environment;
20 import android.os.UserHandle;
21 
22 import java.io.File;
23 
24 /** Directories used for user specific backup/restore persistent state and book-keeping. */
25 final class UserBackupManagerFiles {
26     // Name of the directories the service stores bookkeeping data under.
27     private static final String BACKUP_PERSISTENT_DIR = "backup";
28     private static final String BACKUP_STAGING_DIR = "backup_stage";
29 
getBaseDir(int userId)30     private static File getBaseDir(int userId) {
31         return Environment.getDataSystemCeDirectory(userId);
32     }
33 
getBaseStateDir(int userId)34     static File getBaseStateDir(int userId) {
35         if (userId != UserHandle.USER_SYSTEM) {
36             return new File(getBaseDir(userId), BACKUP_PERSISTENT_DIR);
37         }
38         // TODO (b/120424138) remove if clause above and use same logic for system user.
39         // simultaneously, copy below dir to new system user dir
40         return new File(Environment.getDataDirectory(), BACKUP_PERSISTENT_DIR);
41     }
42 
getDataDir(int userId)43     static File getDataDir(int userId) {
44         if (userId != UserHandle.USER_SYSTEM) {
45             return new File(getBaseDir(userId), BACKUP_STAGING_DIR);
46         }
47         // TODO (b/120424138) remove if clause above and use same logic for system user. Since this
48         // is a staging dir, we dont need to copy below dir to new system user dir
49         return new File(Environment.getDownloadCacheDirectory(), BACKUP_STAGING_DIR);
50     }
51 
52     /** A user specific dir within the system user's directory. */
getStateDirInSystemDir(int userId)53     static File getStateDirInSystemDir(int userId) {
54         return new File(getBaseStateDir(UserHandle.USER_SYSTEM), "" + userId);
55     }
56 
57     /** Stored in a user specific dir within the system user's directory. */
getStateFileInSystemDir(String filename, int userId)58     static File getStateFileInSystemDir(String filename, int userId) {
59         return new File(getStateDirInSystemDir(userId), filename);
60     }
61 }
62