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 17package com.android.server; 18 19import android.content.BroadcastReceiver; 20import android.content.ContentResolver; 21import android.content.Context; 22import android.content.Intent; 23import android.content.SharedPreferences; 24import android.net.Downloads; 25import android.os.Build; 26import android.os.DropBoxManager; 27import android.os.FileObserver; 28import android.os.FileUtils; 29import android.os.RecoverySystem; 30import android.os.SystemProperties; 31import android.provider.Settings; 32import android.util.Slog; 33 34import java.io.File; 35import java.io.IOException; 36 37/** 38 * Performs a number of miscellaneous, non-system-critical actions 39 * after the system has finished booting. 40 */ 41public class BootReceiver extends BroadcastReceiver { 42 private static final String TAG = "BootReceiver"; 43 44 // Maximum size of a logged event (files get truncated if they're longer) 45 private static final int LOG_SIZE = 65536; 46 47 private static final File TOMBSTONE_DIR = new File("/data/tombstones"); 48 49 // The pre-froyo package and class of the system updater, which 50 // ran in the system process. We need to remove its packages here 51 // in order to clean up after a pre-froyo-to-froyo update. 52 private static final String OLD_UPDATER_PACKAGE = 53 "com.google.android.systemupdater"; 54 private static final String OLD_UPDATER_CLASS = 55 "com.google.android.systemupdater.SystemUpdateReceiver"; 56 57 // Keep a reference to the observer so the finalizer doesn't disable it. 58 private static FileObserver sTombstoneObserver = null; 59 60 @Override 61 public void onReceive(final Context context, Intent intent) { 62 try { 63 // Start the load average overlay, if activated 64 ContentResolver res = context.getContentResolver(); 65 if (Settings.System.getInt(res, Settings.System.SHOW_PROCESSES, 0) != 0) { 66 Intent loadavg = new Intent(context, com.android.server.LoadAverageService.class); 67 context.startService(loadavg); 68 } 69 } catch (Exception e) { 70 Slog.e(TAG, "Can't start load average service", e); 71 } 72 73 // Log boot events in the background to avoid blocking the main thread with I/O 74 new Thread() { 75 @Override 76 public void run() { 77 try { 78 logBootEvents(context); 79 } catch (Exception e) { 80 Slog.e(TAG, "Can't log boot events", e); 81 } 82 try { 83 removeOldUpdatePackages(context); 84 } catch (Exception e) { 85 Slog.e(TAG, "Can't remove old update packages", e); 86 } 87 88 } 89 }.start(); 90 } 91 92 private void removeOldUpdatePackages(Context ctx) { 93 Downloads.ByUri.removeAllDownloadsByPackage( 94 ctx, OLD_UPDATER_PACKAGE, OLD_UPDATER_CLASS); 95 } 96 97 private void logBootEvents(Context ctx) throws IOException { 98 final DropBoxManager db = (DropBoxManager) ctx.getSystemService(Context.DROPBOX_SERVICE); 99 final SharedPreferences prefs = ctx.getSharedPreferences("log_files", Context.MODE_PRIVATE); 100 final String headers = new StringBuilder(512) 101 .append("Build: ").append(Build.FINGERPRINT).append("\n") 102 .append("Hardware: ").append(Build.BOARD).append("\n") 103 .append("Bootloader: ").append(Build.BOOTLOADER).append("\n") 104 .append("Radio: ").append(Build.RADIO).append("\n") 105 .append("Kernel: ") 106 .append(FileUtils.readTextFile(new File("/proc/version"), 1024, "...\n")) 107 .append("\n").toString(); 108 109 String recovery = RecoverySystem.handleAftermath(); 110 if (recovery != null && db != null) { 111 db.addText("SYSTEM_RECOVERY_LOG", headers + recovery); 112 } 113 114 if (SystemProperties.getLong("ro.runtime.firstboot", 0) == 0) { 115 String now = Long.toString(System.currentTimeMillis()); 116 SystemProperties.set("ro.runtime.firstboot", now); 117 if (db != null) db.addText("SYSTEM_BOOT", headers); 118 119 // Negative sizes mean to take the *tail* of the file (see FileUtils.readTextFile()) 120 addFileToDropBox(db, prefs, headers, "/proc/last_kmsg", 121 -LOG_SIZE, "SYSTEM_LAST_KMSG"); 122 addFileToDropBox(db, prefs, headers, "/cache/recovery/log", 123 -LOG_SIZE, "SYSTEM_RECOVERY_LOG"); 124 addFileToDropBox(db, prefs, headers, "/data/dontpanic/apanic_console", 125 -LOG_SIZE, "APANIC_CONSOLE"); 126 addFileToDropBox(db, prefs, headers, "/data/dontpanic/apanic_threads", 127 -LOG_SIZE, "APANIC_THREADS"); 128 } else { 129 if (db != null) db.addText("SYSTEM_RESTART", headers); 130 } 131 132 // Scan existing tombstones (in case any new ones appeared) 133 File[] tombstoneFiles = TOMBSTONE_DIR.listFiles(); 134 for (int i = 0; tombstoneFiles != null && i < tombstoneFiles.length; i++) { 135 addFileToDropBox(db, prefs, headers, tombstoneFiles[i].getPath(), 136 LOG_SIZE, "SYSTEM_TOMBSTONE"); 137 } 138 139 // Start watching for new tombstone files; will record them as they occur. 140 // This gets registered with the singleton file observer thread. 141 sTombstoneObserver = new FileObserver(TOMBSTONE_DIR.getPath(), FileObserver.CLOSE_WRITE) { 142 @Override 143 public void onEvent(int event, String path) { 144 try { 145 String filename = new File(TOMBSTONE_DIR, path).getPath(); 146 addFileToDropBox(db, prefs, headers, filename, LOG_SIZE, "SYSTEM_TOMBSTONE"); 147 } catch (IOException e) { 148 Slog.e(TAG, "Can't log tombstone", e); 149 } 150 } 151 }; 152 153 sTombstoneObserver.startWatching(); 154 } 155 156 private static void addFileToDropBox( 157 DropBoxManager db, SharedPreferences prefs, 158 String headers, String filename, int maxSize, String tag) throws IOException { 159 if (db == null || !db.isTagEnabled(tag)) return; // Logging disabled 160 161 File file = new File(filename); 162 long fileTime = file.lastModified(); 163 if (fileTime <= 0) return; // File does not exist 164 165 if (prefs != null) { 166 long lastTime = prefs.getLong(filename, 0); 167 if (lastTime == fileTime) return; // Already logged this particular file 168 prefs.edit().putLong(filename, fileTime).commit(); 169 } 170 171 Slog.i(TAG, "Copying " + filename + " to DropBox (" + tag + ")"); 172 db.addText(tag, headers + FileUtils.readTextFile(file, maxSize, "[[TRUNCATED]]\n")); 173 } 174} 175