1 /* 2 * Copyright (C) 2009 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.app.IWallpaperManager; 20 import android.app.backup.BackupAgentHelper; 21 import android.app.backup.BackupDataInput; 22 import android.app.backup.BackupDataOutput; 23 import android.app.backup.FullBackup; 24 import android.app.backup.FullBackupDataOutput; 25 import android.app.backup.WallpaperBackupHelper; 26 import android.content.Context; 27 import android.os.Environment; 28 import android.os.ParcelFileDescriptor; 29 import android.os.RemoteException; 30 import android.os.ServiceManager; 31 import android.os.UserHandle; 32 import android.util.Slog; 33 34 import java.io.File; 35 import java.io.IOException; 36 37 /** 38 * Backup agent for various system-managed data. Wallpapers are now handled by a 39 * separate package, but we still process restores from legacy datasets here. 40 */ 41 public class SystemBackupAgent extends BackupAgentHelper { 42 private static final String TAG = "SystemBackupAgent"; 43 44 // Names of the helper tags within the dataset. Changing one of these names will 45 // break the ability to restore from datasets that predate the change. 46 private static final String WALLPAPER_HELPER = "wallpaper"; 47 private static final String SYNC_SETTINGS_HELPER = "account_sync_settings"; 48 private static final String PREFERRED_HELPER = "preferred_activities"; 49 private static final String NOTIFICATION_HELPER = "notifications"; 50 private static final String PERMISSION_HELPER = "permissions"; 51 private static final String USAGE_STATS_HELPER = "usage_stats"; 52 private static final String SHORTCUT_MANAGER_HELPER = "shortcut_manager"; 53 private static final String ACCOUNT_MANAGER_HELPER = "account_manager"; 54 private static final String SLICES_HELPER = "slices"; 55 56 // These paths must match what the WallpaperManagerService uses. The leaf *_FILENAME 57 // are also used in the full-backup file format, so must not change unless steps are 58 // taken to support the legacy backed-up datasets. 59 private static final String WALLPAPER_IMAGE_FILENAME = "wallpaper"; 60 private static final String WALLPAPER_INFO_FILENAME = "wallpaper_info.xml"; 61 62 // TODO: Will need to change if backing up non-primary user's wallpaper 63 // TODO: http://b/22388012 64 private static final String WALLPAPER_IMAGE_DIR = 65 Environment.getUserSystemDirectory(UserHandle.USER_SYSTEM).getAbsolutePath(); 66 public static final String WALLPAPER_IMAGE = 67 new File(Environment.getUserSystemDirectory(UserHandle.USER_SYSTEM), 68 "wallpaper").getAbsolutePath(); 69 70 // TODO: Will need to change if backing up non-primary user's wallpaper 71 // TODO: http://b/22388012 72 private static final String WALLPAPER_INFO_DIR = 73 Environment.getUserSystemDirectory(UserHandle.USER_SYSTEM).getAbsolutePath(); 74 public static final String WALLPAPER_INFO = 75 new File(Environment.getUserSystemDirectory(UserHandle.USER_SYSTEM), 76 "wallpaper_info.xml").getAbsolutePath(); 77 // Use old keys to keep legacy data compatibility and avoid writing two wallpapers 78 private static final String WALLPAPER_IMAGE_KEY = WallpaperBackupHelper.WALLPAPER_IMAGE_KEY; 79 80 private WallpaperBackupHelper mWallpaperHelper = null; 81 82 @Override onBackup(ParcelFileDescriptor oldState, BackupDataOutput data, ParcelFileDescriptor newState)83 public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data, 84 ParcelFileDescriptor newState) throws IOException { 85 addHelper(SYNC_SETTINGS_HELPER, new AccountSyncSettingsBackupHelper(this)); 86 addHelper(PREFERRED_HELPER, new PreferredActivityBackupHelper()); 87 addHelper(NOTIFICATION_HELPER, new NotificationBackupHelper(this)); 88 addHelper(PERMISSION_HELPER, new PermissionBackupHelper()); 89 addHelper(USAGE_STATS_HELPER, new UsageStatsBackupHelper(this)); 90 addHelper(SHORTCUT_MANAGER_HELPER, new ShortcutBackupHelper()); 91 addHelper(ACCOUNT_MANAGER_HELPER, new AccountManagerBackupHelper()); 92 addHelper(SLICES_HELPER, new SliceBackupHelper(this)); 93 super.onBackup(oldState, data, newState); 94 } 95 96 @Override onFullBackup(FullBackupDataOutput data)97 public void onFullBackup(FullBackupDataOutput data) throws IOException { 98 // At present we don't back up anything 99 } 100 101 @Override onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState)102 public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) 103 throws IOException { 104 // Slot in a restore helper for the older wallpaper backup schema to support restore 105 // from devices still generating data in that format. 106 mWallpaperHelper = new WallpaperBackupHelper(this, 107 new String[] { WALLPAPER_IMAGE_KEY} ); 108 addHelper(WALLPAPER_HELPER, mWallpaperHelper); 109 110 // On restore, we also support a long-ago wallpaper data schema "system_files" 111 addHelper("system_files", new WallpaperBackupHelper(this, 112 new String[] { WALLPAPER_IMAGE_KEY} )); 113 114 addHelper(SYNC_SETTINGS_HELPER, new AccountSyncSettingsBackupHelper(this)); 115 addHelper(PREFERRED_HELPER, new PreferredActivityBackupHelper()); 116 addHelper(NOTIFICATION_HELPER, new NotificationBackupHelper(this)); 117 addHelper(PERMISSION_HELPER, new PermissionBackupHelper()); 118 addHelper(USAGE_STATS_HELPER, new UsageStatsBackupHelper(this)); 119 addHelper(SHORTCUT_MANAGER_HELPER, new ShortcutBackupHelper()); 120 addHelper(ACCOUNT_MANAGER_HELPER, new AccountManagerBackupHelper()); 121 addHelper(SLICES_HELPER, new SliceBackupHelper(this)); 122 123 super.onRestore(data, appVersionCode, newState); 124 } 125 126 /** 127 * Support for 'adb restore' of legacy archives 128 */ 129 @Override onRestoreFile(ParcelFileDescriptor data, long size, int type, String domain, String path, long mode, long mtime)130 public void onRestoreFile(ParcelFileDescriptor data, long size, 131 int type, String domain, String path, long mode, long mtime) 132 throws IOException { 133 Slog.i(TAG, "Restoring file domain=" + domain + " path=" + path); 134 135 // Bits to indicate postprocessing we may need to perform 136 boolean restoredWallpaper = false; 137 138 File outFile = null; 139 // Various domain+files we understand a priori 140 if (domain.equals(FullBackup.ROOT_TREE_TOKEN)) { 141 if (path.equals(WALLPAPER_INFO_FILENAME)) { 142 outFile = new File(WALLPAPER_INFO); 143 restoredWallpaper = true; 144 } else if (path.equals(WALLPAPER_IMAGE_FILENAME)) { 145 outFile = new File(WALLPAPER_IMAGE); 146 restoredWallpaper = true; 147 } 148 } 149 150 try { 151 if (outFile == null) { 152 Slog.w(TAG, "Skipping unrecognized system file: [ " + domain + " : " + path + " ]"); 153 } 154 FullBackup.restoreFile(data, size, type, mode, mtime, outFile); 155 156 if (restoredWallpaper) { 157 IWallpaperManager wallpaper = 158 (IWallpaperManager)ServiceManager.getService( 159 Context.WALLPAPER_SERVICE); 160 if (wallpaper != null) { 161 try { 162 wallpaper.settingsRestored(); 163 } catch (RemoteException re) { 164 Slog.e(TAG, "Couldn't restore settings\n" + re); 165 } 166 } 167 } 168 } catch (IOException e) { 169 if (restoredWallpaper) { 170 // Make sure we wind up in a good state 171 (new File(WALLPAPER_IMAGE)).delete(); 172 (new File(WALLPAPER_INFO)).delete(); 173 } 174 } 175 } 176 } 177