SystemBackupAgent.java revision 79ec80db70d788f35aa13346e4684ecbd401bd84
19bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato/* 29bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * Copyright (C) 2009 The Android Open Source Project 39bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * 49bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * Licensed under the Apache License, Version 2.0 (the "License"); 59bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * you may not use this file except in compliance with the License. 69bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * You may obtain a copy of the License at 79bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * 89bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * http://www.apache.org/licenses/LICENSE-2.0 99bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * 109bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * Unless required by applicable law or agreed to in writing, software 119bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * distributed under the License is distributed on an "AS IS" BASIS, 129bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * See the License for the specific language governing permissions and 149bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato * limitations under the License. 159bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato */ 169bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 179bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratopackage com.android.server; 189bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 19a924dc0db952fe32509435fdb8dc9c84a9e181f3Dianne Hackborn 204528186e0d65fc68ef0dd1941aa2ac8aefcd55a3Christopher Tateimport android.app.backup.BackupDataInput; 214528186e0d65fc68ef0dd1941aa2ac8aefcd55a3Christopher Tateimport android.app.backup.BackupDataOutput; 22cc84c69726507a85116f5664e20e2ebfac76edbeChristopher Tateimport android.app.backup.BackupAgentHelper; 234a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tateimport android.app.backup.FullBackup; 243f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tateimport android.app.backup.WallpaperBackupHelper; 259bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratoimport android.content.Context; 269bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratoimport android.os.ParcelFileDescriptor; 279bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratoimport android.os.ServiceManager; 288a9b22056b13477f59df934928c00c58b5871c95Joe Onoratoimport android.util.Slog; 299bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 303f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tate 319bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratoimport java.io.File; 329bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onoratoimport java.io.IOException; 339bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 349bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato/** 357c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate * Backup agent for various system-managed data, currently just the system wallpaper 369bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato */ 37cc84c69726507a85116f5664e20e2ebfac76edbeChristopher Tatepublic class SystemBackupAgent extends BackupAgentHelper { 389bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato private static final String TAG = "SystemBackupAgent"; 399bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 4075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // These paths must match what the WallpaperManagerService uses. The leaf *_FILENAME 4175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // are also used in the full-backup file format, so must not change unless steps are 4275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // taken to support the legacy backed-up datasets. 4375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate private static final String WALLPAPER_IMAGE_FILENAME = "wallpaper"; 4475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate private static final String WALLPAPER_INFO_FILENAME = "wallpaper_info.xml"; 4575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 464a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate private static final String WALLPAPER_IMAGE_DIR = "/data/data/com.android.settings/files"; 4775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate private static final String WALLPAPER_IMAGE = WALLPAPER_IMAGE_DIR + "/" + WALLPAPER_IMAGE_FILENAME; 4875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 494a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate private static final String WALLPAPER_INFO_DIR = "/data/system"; 5075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate private static final String WALLPAPER_INFO = WALLPAPER_INFO_DIR + "/" + WALLPAPER_INFO_FILENAME; 5175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 529bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 539bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato @Override 547c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate public void onBackup(ParcelFileDescriptor oldState, BackupDataOutput data, 557c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate ParcelFileDescriptor newState) throws IOException { 564a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate if (oldState == null) { 5775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // Ah, it's a full backup dataset, being restored piecemeal. Just 5875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // pop over to the full restore handling and we're done. 594a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate runFullBackup(data); 604a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate return; 614a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate } 624a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate 637c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate // We only back up the data under the current "wallpaper" schema with metadata 64541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService( 65541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor Context.WALLPAPER_SERVICE); 66541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor String[] files = new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO }; 67541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor if (wallpaper != null && wallpaper.mName != null && wallpaper.mName.length() > 0) { 68541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor // When the wallpaper has a name, back up the info by itself. 69541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor // TODO: Don't rely on the innards of the service object like this! 70541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor // TODO: Send a delete for any stored wallpaper image in this case? 71541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor files = new String[] { WALLPAPER_INFO }; 72541fa51e5ccba9e2def2632f9835db0c9407ec5cDan Egnor } 733f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tate addHelper("wallpaper", new WallpaperBackupHelper(SystemBackupAgent.this, files)); 747c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate super.onBackup(oldState, data, newState); 759bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato } 769bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 774a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate private void runFullBackup(BackupDataOutput output) { 7875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate fullWallpaperBackup(output); 7975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 8075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 8175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate private void fullWallpaperBackup(BackupDataOutput output) { 8275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // Back up the data files directly. We do them in this specific order -- 8375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // info file followed by image -- because then we need take no special 8475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // steps during restore; the restore will happen properly when the individual 8575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // files are restored piecemeal. 8675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate FullBackup.backupToTar(getPackageName(), FullBackup.ROOT_TREE_TOKEN, null, 874a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate WALLPAPER_INFO_DIR, WALLPAPER_INFO, output); 8875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate FullBackup.backupToTar(getPackageName(), FullBackup.ROOT_TREE_TOKEN, null, 8975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate WALLPAPER_IMAGE_DIR, WALLPAPER_IMAGE, output); 904a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate } 914a627c71ff53a4fca1f961f4b1dcc0461df18a06Christopher Tate 929bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato @Override 939bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato public void onRestore(BackupDataInput data, int appVersionCode, ParcelFileDescriptor newState) 949bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato throws IOException { 957c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate // On restore, we also support a previous data schema "system_files" 963f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tate addHelper("wallpaper", new WallpaperBackupHelper(SystemBackupAgent.this, 977c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate new String[] { WALLPAPER_IMAGE, WALLPAPER_INFO })); 983f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tate addHelper("system_files", new WallpaperBackupHelper(SystemBackupAgent.this, 997c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate new String[] { WALLPAPER_IMAGE })); 1007c2bb66db77653c0a690962858cf105b0cb981d7Christopher Tate 1019bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato try { 1029bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato super.onRestore(data, appVersionCode, newState); 1039bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato 1048cc6a5026aeb5cf9cc36529426fe0cc66714f5fbDianne Hackborn WallpaperManagerService wallpaper = (WallpaperManagerService)ServiceManager.getService( 1059bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato Context.WALLPAPER_SERVICE); 1069bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato wallpaper.settingsRestored(); 1079bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato } catch (IOException ex) { 1083f64f8d8fc05189777e83b4efd3882cbc661fdebChristopher Tate // If there was a failure, delete everything for the wallpaper, this is too aggressive, 1099bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato // but this is hopefully a rare failure. 1108a9b22056b13477f59df934928c00c58b5871c95Joe Onorato Slog.d(TAG, "restore failed", ex); 1119bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato (new File(WALLPAPER_IMAGE)).delete(); 1129bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato (new File(WALLPAPER_INFO)).delete(); 1139bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato } 1149bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato } 11575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 11675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate @Override 11775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate public void onRestoreFile(ParcelFileDescriptor data, long size, 11875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate int type, String domain, String path, long mode, long mtime) 11975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate throws IOException { 12075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate Slog.i(TAG, "Restoring file domain=" + domain + " path=" + path); 12175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 12275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // Bits to indicate postprocessing we may need to perform 12375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate boolean restoredWallpaper = false; 12475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 12575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate File outFile = null; 12675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // Various domain+files we understand a priori 12775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate if (domain.equals(FullBackup.ROOT_TREE_TOKEN)) { 12875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate if (path.equals(WALLPAPER_INFO_FILENAME)) { 12975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate outFile = new File(WALLPAPER_INFO); 13075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate restoredWallpaper = true; 13175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } else if (path.equals(WALLPAPER_IMAGE_FILENAME)) { 13275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate outFile = new File(WALLPAPER_IMAGE); 13375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate restoredWallpaper = true; 13475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 13575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 13675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 13775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate try { 13875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate if (outFile == null) { 13975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate Slog.w(TAG, "Skipping unrecognized system file: [ " + domain + " : " + path + " ]"); 14075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 14179ec80db70d788f35aa13346e4684ecbd401bd84Christopher Tate FullBackup.restoreFile(data, size, type, mode, mtime, outFile); 14275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate 14375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate if (restoredWallpaper) { 14475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate WallpaperManagerService wallpaper = 14575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate (WallpaperManagerService)ServiceManager.getService( 14675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate Context.WALLPAPER_SERVICE); 14775a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate wallpaper.settingsRestored(); 14875a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 14975a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } catch (IOException e) { 15075a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate if (restoredWallpaper) { 15175a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate // Make sure we wind up in a good state 15275a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate (new File(WALLPAPER_IMAGE)).delete(); 15375a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate (new File(WALLPAPER_INFO)).delete(); 15475a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 15575a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 15675a99709accef8cf221fd436d646727e7c8dd1f1Christopher Tate } 1579bb8fd77c8dc177aab9ac96bed4f55972dcda70aJoe Onorato} 158