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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* Copyright (C) 2009 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.
*/
package com.android.server;
import android.app.backup.AbsoluteFileBackupHelper;
import android.app.backup.BackupDataInput;
import android.app.backup.BackupDataOutput;
import android.app.backup.BackupAgentHelper;
import android.app.backup.FullBackup;
import android.app.backup.FullBackupDataOutput;
import android.app.backup.WallpaperBackupHelper;
import android.content.Context;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.os.ServiceManager;
import android.os.UserHandle;
import android.util.Slog;
import java.io.File;
import java.io.IOException;
/**
* Backup agent for various system-managed data, currently just the system wallpaper
*/
public class SystemBackupAgent extends BackupAgentHelper {
private static final String TAG = "SystemBackupAgent";
// These paths must match what the WallpaperManagerService uses. The leaf *_FILENAME
// are also used in the full-backup file format, so must not change unless steps are
// taken to support the legacy backed-up datasets.
private static final String WALLPAPER_IMAGE_FILENAME = "wallpaper";
private static final String WALLPAPER_INFO_FILENAME = "wallpaper_info.xml";
private static final String PROFILES_FILENAME =
ProfileManagerService.PROFILE_FILE.getName();
private static final String PROFILES_FILE_DIRECTORY =
ProfileManagerService.PROFILE_FILE.getParentFile().getAbsolutePath();
// TODO: Will need to change if backing up non-primary user's wallpaper
private static final String WALLPAPER_IMAGE_DIR =
Environment.getUserSystemDirectory(UserHandle.USER_OWNER).getAbsolutePath();
private static final String WALLPAPER_IMAGE = WallpaperBackupHelper.WALLPAPER_IMAGE;
// TODO: Will need to change if backing up non-primary user's wallpaper
private static final String WALLPAPER_INFO_DIR =
Environment.getUserSystemDirectory(UserHandle.USER_OWNER).getAbsolutePath();
private static final String WALLPAPER_INFO = WallpaperBackupHelper.WALLPAPER_INFO;
// Use old keys to keep legacy data compatibility and avoid writing two wallpapers
private static final String WALLPAPER_IMAGE_KEY = WallpaperBackupHelper.WALLPAPER_IMAGE_KEY;
private static final String WALLPAPER_INFO_KEY = WallpaperBackupHelper.WALLPAPER_INFO_KEY;
@Override
public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data,
ParcelFileDescriptor newState) throws IOException {
// We only back up the data under the current "wallpaper" schema with metadata
WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService(
Context.WALLPAPER_SERVICE);
String[] files = new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO };
String[] keys = new String[] { WALLPAPER_IMAGE_KEY, WALLPAPER_INFO_KEY };
if (wallpaper != null && wallpaper.getName() != null && wallpaper.getName().length() > 0) {
// When the wallpaper has a name, back up the info by itself.
// TODO: Don't rely on the innards of the service object like this!
// TODO: Send a delete for any stored wallpaper image in this case?
files = new String[] { WALLPAPER_INFO };
keys = new String[] { WALLPAPER_INFO_KEY };
}
addHelper("wallpaper", new WallpaperBackupHelper(SystemBackupAgent.this, files, keys));
addHelper("profiles", new AbsoluteFileBackupHelper(SystemBackupAgent.this,
ProfileManagerService.PROFILE_FILE.getAbsolutePath()));
super.onBackup(oldState, data, newState);
}
@Override
public void onFullBackup(FullBackupDataOutput data) throws IOException {
// At present we back up only the wallpaper and profiles
fullWallpaperBackup(data);
fullProfilesBackup(data);
}
private void fullWallpaperBackup(FullBackupDataOutput output) {
// Back up the data files directly. We do them in this specific order --
// info file followed by image -- because then we need take no special
// steps during restore; the restore will happen properly when the individual
// files are restored piecemeal.
FullBackup.backupToTar(getPackageName(), FullBackup.ROOT_TREE_TOKEN, null,
WALLPAPER_INFO_DIR, WALLPAPER_INFO, output.getData());
FullBackup.backupToTar(getPackageName(), FullBackup.ROOT_TREE_TOKEN, null,
WALLPAPER_IMAGE_DIR, WALLPAPER_IMAGE, output.getData());
}
private void fullProfilesBackup(FullBackupDataOutput output) {
FullBackup.backupToTar(getPackageName(), FullBackup.ROOT_TREE_TOKEN, null,
PROFILES_FILE_DIRECTORY, PROFILES_FILENAME, output.getData());
}
@Override
public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)
throws IOException {
// On restore, we also support a previous data schema "system_files"
addHelper("wallpaper", new WallpaperBackupHelper(SystemBackupAgent.this,
new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO },
new String[] { WALLPAPER_IMAGE_KEY, WALLPAPER_INFO_KEY} ));
addHelper("system_files", new WallpaperBackupHelper(SystemBackupAgent.this,
new String[] { WALLPAPER_IMAGE },
new String[] { WALLPAPER_IMAGE_KEY} ));
addHelper("profiles", new AbsoluteFileBackupHelper(SystemBackupAgent.this,
ProfileManagerService.PROFILE_FILE.getAbsolutePath()));
try {
super.onRestore(data, appVersionCode, newState);
WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService(
Context.WALLPAPER_SERVICE);
ProfileManagerService profiles = (ProfileManagerService)ServiceManager.getService(
Context.PROFILE_SERVICE);
wallpaper.settingsRestored();
profiles.settingsRestored();
} catch (IOException ex) {
// If there was a failure, delete everything for the wallpaper, this is too aggressive,
// but this is hopefully a rare failure.
Slog.d(TAG, "restore failed", ex);
(new File(WALLPAPER_IMAGE)).delete();
(new File(WALLPAPER_INFO)).delete();
}
}
@Override
public void onRestoreFile(ParcelFileDescriptor data, long size,
int type, String domain, String path, long mode, long mtime)
throws IOException {
Slog.i(TAG, "Restoring file domain=" + domain + " path=" + path);
// Bits to indicate postprocessing we may need to perform
boolean restoredWallpaper = false;
boolean restoredProfiles = false;
File outFile = null;
// Various domain+files we understand a priori
if (domain.equals(FullBackup.ROOT_TREE_TOKEN)) {
if (path.equals(WALLPAPER_INFO_FILENAME)) {
outFile = new File(WALLPAPER_INFO);
restoredWallpaper = true;
} else if (path.equals(WALLPAPER_IMAGE_FILENAME)) {
outFile = new File(WALLPAPER_IMAGE);
restoredWallpaper = true;
} else if (path.equals(PROFILES_FILENAME)) {
outFile = ProfileManagerService.PROFILE_FILE;
restoredProfiles = true;
}
}
try {
if (outFile == null) {
Slog.w(TAG, "Skipping unrecognized system file: [ " + domain + " : " + path + " ]");
}
FullBackup.restoreFile(data, size, type, mode, mtime, outFile);
if (restoredWallpaper) {
WallpaperManagerService wallpaper =
(WallpaperManagerService)ServiceManager.getService(
Context.WALLPAPER_SERVICE);
wallpaper.settingsRestored();
}
if (restoredProfiles) {
ProfileManagerService profiles = (ProfileManagerService)
ServiceManager.getService(Context.PROFILE_SERVICE);
profiles.settingsRestored();
}
} catch (IOException e) {
if (restoredWallpaper) {
// Make sure we wind up in a good state
(new File(WALLPAPER_IMAGE)).delete();
(new File(WALLPAPER_INFO)).delete();
}
}
}
}
|
