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BootReceiver.javaAPI DocAndroid 5.1 API11857Thu Mar 12 22:22:10 GMT 2015com.android.server

BootReceiver

public class BootReceiver extends android.content.BroadcastReceiver
Performs a number of miscellaneous, non-system-critical actions after the system has finished booting.

Fields Summary
private static final String
TAG
private static final int
LOG_SIZE
private static final File
TOMBSTONE_DIR
private static final String
OLD_UPDATER_PACKAGE
private static final String
OLD_UPDATER_CLASS
private static android.os.FileObserver
sTombstoneObserver
Constructors Summary
Methods Summary
private static voidaddAuditErrorsToDropBox(android.os.DropBoxManager db, android.content.SharedPreferences prefs, java.lang.String headers, int maxSize, java.lang.String tag)

        if (db == null || !db.isTagEnabled(tag)) return;  // Logging disabled
        Slog.i(TAG, "Copying audit failures to DropBox");

        File file = new File("/proc/last_kmsg");
        long fileTime = file.lastModified();
        if (fileTime <= 0) {
            file = new File("/sys/fs/pstore/console-ramoops");
            fileTime = file.lastModified();
        }

        if (fileTime <= 0) return;  // File does not exist

        if (prefs != null) {
            long lastTime = prefs.getLong(tag, 0);
            if (lastTime == fileTime) return;  // Already logged this particular file
            // TODO: move all these SharedPreferences Editor commits
            // outside this function to the end of logBootEvents
            prefs.edit().putLong(tag, fileTime).apply();
        }

        String log = FileUtils.readTextFile(file, maxSize, "[[TRUNCATED]]\n");
        StringBuilder sb = new StringBuilder();
        for (String line : log.split("\n")) {
            if (line.contains("audit")) {
                sb.append(line + "\n");
            }
        }
        Slog.i(TAG, "Copied " + sb.toString().length() + " worth of audits to DropBox");
        db.addText(tag, headers + sb.toString());
private static voidaddFileToDropBox(android.os.DropBoxManager db, android.content.SharedPreferences prefs, java.lang.String headers, java.lang.String filename, int maxSize, java.lang.String tag)

        addFileWithFootersToDropBox(db, prefs, headers, "", filename, maxSize,
                tag);
private static voidaddFileWithFootersToDropBox(android.os.DropBoxManager db, android.content.SharedPreferences prefs, java.lang.String headers, java.lang.String footers, java.lang.String filename, int maxSize, java.lang.String tag)

        if (db == null || !db.isTagEnabled(tag)) return;  // Logging disabled

        File file = new File(filename);
        long fileTime = file.lastModified();
        if (fileTime <= 0) return;  // File does not exist

        if (prefs != null) {
            long lastTime = prefs.getLong(filename, 0);
            if (lastTime == fileTime) return;  // Already logged this particular file
            // TODO: move all these SharedPreferences Editor commits
            // outside this function to the end of logBootEvents
            prefs.edit().putLong(filename, fileTime).apply();
        }

        Slog.i(TAG, "Copying " + filename + " to DropBox (" + tag + ")");
        db.addText(tag, headers + FileUtils.readTextFile(file, maxSize, "[[TRUNCATED]]\n") + footers);
private static voidaddFsckErrorsToDropBox(android.os.DropBoxManager db, android.content.SharedPreferences prefs, java.lang.String headers, int maxSize, java.lang.String tag)

        boolean upload_needed = false;
        if (db == null || !db.isTagEnabled(tag)) return;  // Logging disabled
        Slog.i(TAG, "Checking for fsck errors");

        File file = new File("/dev/fscklogs/log");
        long fileTime = file.lastModified();
        if (fileTime <= 0) return;  // File does not exist

        String log = FileUtils.readTextFile(file, maxSize, "[[TRUNCATED]]\n");
        StringBuilder sb = new StringBuilder();
        for (String line : log.split("\n")) {
            if (line.contains("FILE SYSTEM WAS MODIFIED")) {
                upload_needed = true;
                break;
            }
        }

        if (upload_needed) {
            addFileToDropBox(db, prefs, headers, "/dev/fscklogs/log", maxSize, tag);
        }

        // Remove the file so we don't re-upload if the runtime restarts.
        file.delete();
private voidlogBootEvents(android.content.Context ctx)

        final DropBoxManager db = (DropBoxManager) ctx.getSystemService(Context.DROPBOX_SERVICE);
        final SharedPreferences prefs = ctx.getSharedPreferences("log_files", Context.MODE_PRIVATE);
        final String headers = new StringBuilder(512)
            .append("Build: ").append(Build.FINGERPRINT).append("\n")
            .append("Hardware: ").append(Build.BOARD).append("\n")
            .append("Revision: ")
            .append(SystemProperties.get("ro.revision", "")).append("\n")
            .append("Bootloader: ").append(Build.BOOTLOADER).append("\n")
            .append("Radio: ").append(Build.RADIO).append("\n")
            .append("Kernel: ")
            .append(FileUtils.readTextFile(new File("/proc/version"), 1024, "...\n"))
            .append("\n").toString();
        final String bootReason = SystemProperties.get("ro.boot.bootreason", null);

        String recovery = RecoverySystem.handleAftermath();
        if (recovery != null && db != null) {
            db.addText("SYSTEM_RECOVERY_LOG", headers + recovery);
        }

        String lastKmsgFooter = "";
        if (bootReason != null) {
            lastKmsgFooter = new StringBuilder(512)
                .append("\n")
                .append("Boot info:\n")
                .append("Last boot reason: ").append(bootReason).append("\n")
                .toString();
        }

        if (SystemProperties.getLong("ro.runtime.firstboot", 0) == 0) {
            if ("encrypted".equals(SystemProperties.get("ro.crypto.state"))
                && "trigger_restart_min_framework".equals(SystemProperties.get("vold.decrypt"))){
                // Encrypted, first boot to get PIN/pattern/password so data is tmpfs
                // Don't set ro.runtime.firstboot so that we will do this again
                // when data is properly mounted
            } else {
                String now = Long.toString(System.currentTimeMillis());
                SystemProperties.set("ro.runtime.firstboot", now);
            }
            if (db != null) db.addText("SYSTEM_BOOT", headers);

            // Negative sizes mean to take the *tail* of the file (see FileUtils.readTextFile())
            addFileWithFootersToDropBox(db, prefs, headers, lastKmsgFooter,
                    "/proc/last_kmsg", -LOG_SIZE, "SYSTEM_LAST_KMSG");
            addFileWithFootersToDropBox(db, prefs, headers, lastKmsgFooter,
                    "/sys/fs/pstore/console-ramoops", -LOG_SIZE,
                    "SYSTEM_LAST_KMSG");
            addFileToDropBox(db, prefs, headers, "/cache/recovery/log",
                    -LOG_SIZE, "SYSTEM_RECOVERY_LOG");
            addFileToDropBox(db, prefs, headers, "/cache/recovery/last_kmsg",
                    -LOG_SIZE, "SYSTEM_RECOVERY_KMSG");
            addFileToDropBox(db, prefs, headers, "/data/dontpanic/apanic_console",
                    -LOG_SIZE, "APANIC_CONSOLE");
            addFileToDropBox(db, prefs, headers, "/data/dontpanic/apanic_threads",
                    -LOG_SIZE, "APANIC_THREADS");
            addAuditErrorsToDropBox(db, prefs, headers, -LOG_SIZE, "SYSTEM_AUDIT");
            addFsckErrorsToDropBox(db, prefs, headers, -LOG_SIZE, "SYSTEM_FSCK");
        } else {
            if (db != null) db.addText("SYSTEM_RESTART", headers);
        }

        // Scan existing tombstones (in case any new ones appeared)
        File[] tombstoneFiles = TOMBSTONE_DIR.listFiles();
        for (int i = 0; tombstoneFiles != null && i < tombstoneFiles.length; i++) {
            if (tombstoneFiles[i].isFile()) {
                addFileToDropBox(db, prefs, headers, tombstoneFiles[i].getPath(),
                        LOG_SIZE, "SYSTEM_TOMBSTONE");
            }
        }

        // Start watching for new tombstone files; will record them as they occur.
        // This gets registered with the singleton file observer thread.
        sTombstoneObserver = new FileObserver(TOMBSTONE_DIR.getPath(), FileObserver.CLOSE_WRITE) {
            @Override
            public void onEvent(int event, String path) {
                try {
                    File file = new File(TOMBSTONE_DIR, path);
                    if (file.isFile()) {
                        addFileToDropBox(db, prefs, headers, file.getPath(), LOG_SIZE, "SYSTEM_TOMBSTONE");
                    }
                } catch (IOException e) {
                    Slog.e(TAG, "Can't log tombstone", e);
                }
            }
        };

        sTombstoneObserver.startWatching();
public voidonReceive(android.content.Context context, android.content.Intent intent)


    
           
        // Log boot events in the background to avoid blocking the main thread with I/O
        new Thread() {
            @Override
            public void run() {
                try {
                    logBootEvents(context);
                } catch (Exception e) {
                    Slog.e(TAG, "Can't log boot events", e);
                }
                try {
                    boolean onlyCore = false;
                    try {
                        onlyCore = IPackageManager.Stub.asInterface(ServiceManager.getService(
                                "package")).isOnlyCoreApps();
                    } catch (RemoteException e) {
                    }
                    if (!onlyCore) {
                        removeOldUpdatePackages(context);
                    }
                } catch (Exception e) {
                    Slog.e(TAG, "Can't remove old update packages", e);
                }

            }
        }.start();
private voidremoveOldUpdatePackages(android.content.Context context)

        Downloads.removeAllDownloadsByPackage(context, OLD_UPDATER_PACKAGE, OLD_UPDATER_CLASS);