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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* 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.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.IPackageManager;
import android.os.Build;
import android.os.DropBoxManager;
import android.os.Environment;
import android.os.FileObserver;
import android.os.FileUtils;
import android.os.RecoverySystem;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.os.storage.StorageManager;
import android.provider.Downloads;
import android.text.TextUtils;
import android.util.AtomicFile;
import android.util.EventLog;
import android.util.Slog;
import android.util.StatsLog;
import android.util.Xml;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.util.FastXmlSerializer;
import com.android.internal.util.XmlUtils;
import com.android.server.DropboxLogTags;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
/**
* Performs a number of miscellaneous, non-system-critical actions
* after the system has finished booting.
*/
public class BootReceiver extends BroadcastReceiver {
private static final String TAG = "BootReceiver";
// Maximum size of a logged event (files get truncated if they're longer).
// Give userdebug builds a larger max to capture extra debug, esp. for last_kmsg.
private static final int LOG_SIZE =
SystemProperties.getInt("ro.debuggable", 0) == 1 ? 98304 : 65536;
private static final File TOMBSTONE_DIR = new File("/data/tombstones");
private static final String TAG_TOMBSTONE = "SYSTEM_TOMBSTONE";
// The pre-froyo package and class of the system updater, which
// ran in the system process. We need to remove its packages here
// in order to clean up after a pre-froyo-to-froyo update.
private static final String OLD_UPDATER_PACKAGE =
"com.google.android.systemupdater";
private static final String OLD_UPDATER_CLASS =
"com.google.android.systemupdater.SystemUpdateReceiver";
// Keep a reference to the observer so the finalizer doesn't disable it.
private static FileObserver sTombstoneObserver = null;
private static final String LOG_FILES_FILE = "log-files.xml";
private static final AtomicFile sFile = new AtomicFile(new File(
Environment.getDataSystemDirectory(), LOG_FILES_FILE), "log-files");
private static final String LAST_HEADER_FILE = "last-header.txt";
private static final File lastHeaderFile = new File(
Environment.getDataSystemDirectory(), LAST_HEADER_FILE);
// example: fs_stat,/dev/block/platform/soc/by-name/userdata,0x5
private static final String FS_STAT_PATTERN = "fs_stat,[^,]*/([^/,]+),(0x[0-9a-fA-F]+)";
private static final int FS_STAT_FS_FIXED = 0x400; // should match with fs_mgr.cpp:FsStatFlags
private static final String FSCK_PASS_PATTERN = "Pass ([1-9]E?):";
private static final String FSCK_TREE_OPTIMIZATION_PATTERN =
"Inode [0-9]+ extent tree.*could be shorter";
private static final String FSCK_FS_MODIFIED = "FILE SYSTEM WAS MODIFIED";
// ro.boottime.init.mount_all. + postfix for mount_all duration
private static final String[] MOUNT_DURATION_PROPS_POSTFIX =
new String[] { "early", "default", "late" };
// for reboot, fs shutdown time is recorded in last_kmsg.
private static final String[] LAST_KMSG_FILES =
new String[] { "/sys/fs/pstore/console-ramoops", "/proc/last_kmsg" };
// first: fs shutdown time in ms, second: umount status defined in init/reboot.h
private static final String LAST_SHUTDOWN_TIME_PATTERN =
"powerctl_shutdown_time_ms:([0-9]+):([0-9]+)";
private static final int UMOUNT_STATUS_NOT_AVAILABLE = 4; // should match with init/reboot.h
// Location of file with metrics recorded during shutdown
private static final String SHUTDOWN_METRICS_FILE = "/data/system/shutdown-metrics.txt";
private static final String SHUTDOWN_TRON_METRICS_PREFIX = "shutdown_";
private static final String METRIC_SYSTEM_SERVER = "shutdown_system_server";
private static final String METRIC_SHUTDOWN_TIME_START = "begin_shutdown";
@Override
public void onReceive(final Context context, 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 void removeOldUpdatePackages(Context context) {
Downloads.removeAllDownloadsByPackage(context, OLD_UPDATER_PACKAGE, OLD_UPDATER_CLASS);
}
private String getPreviousBootHeaders() {
try {
return FileUtils.readTextFile(lastHeaderFile, 0, null);
} catch (IOException e) {
return null;
}
}
private String getCurrentBootHeaders() throws IOException {
return 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.getRadioVersion()).append("\n")
.append("Kernel: ")
.append(FileUtils.readTextFile(new File("/proc/version"), 1024, "...\n"))
.append("\n").toString();
}
private String getBootHeadersToLogAndUpdate() throws IOException {
final String oldHeaders = getPreviousBootHeaders();
final String newHeaders = getCurrentBootHeaders();
try {
FileUtils.stringToFile(lastHeaderFile, newHeaders);
} catch (IOException e) {
Slog.e(TAG, "Error writing " + lastHeaderFile, e);
}
if (oldHeaders == null) {
// If we failed to read the old headers, use the current headers
// but note this in the headers so we know
return "isPrevious: false\n" + newHeaders;
}
return "isPrevious: true\n" + oldHeaders;
}
private void logBootEvents(Context ctx) throws IOException {
final DropBoxManager db = (DropBoxManager) ctx.getSystemService(Context.DROPBOX_SERVICE);
final String headers = getBootHeadersToLogAndUpdate();
final String bootReason = SystemProperties.get("ro.boot.bootreason", null);
String recovery = RecoverySystem.handleAftermath(ctx);
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();
}
HashMap timestamps = readTimestamps();
if (SystemProperties.getLong("ro.runtime.firstboot", 0) == 0) {
if (StorageManager.inCryptKeeperBounce()) {
// 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, timestamps, headers, lastKmsgFooter,
"/proc/last_kmsg", -LOG_SIZE, "SYSTEM_LAST_KMSG");
addFileWithFootersToDropBox(db, timestamps, headers, lastKmsgFooter,
"/sys/fs/pstore/console-ramoops", -LOG_SIZE, "SYSTEM_LAST_KMSG");
addFileWithFootersToDropBox(db, timestamps, headers, lastKmsgFooter,
"/sys/fs/pstore/console-ramoops-0", -LOG_SIZE, "SYSTEM_LAST_KMSG");
addFileToDropBox(db, timestamps, headers, "/cache/recovery/log", -LOG_SIZE,
"SYSTEM_RECOVERY_LOG");
addFileToDropBox(db, timestamps, headers, "/cache/recovery/last_kmsg",
-LOG_SIZE, "SYSTEM_RECOVERY_KMSG");
addAuditErrorsToDropBox(db, timestamps, headers, -LOG_SIZE, "SYSTEM_AUDIT");
} else {
if (db != null) db.addText("SYSTEM_RESTART", headers);
}
// log always available fs_stat last so that logcat collecting tools can wait until
// fs_stat to get all file system metrics.
logFsShutdownTime();
logFsMountTime();
addFsckErrorsToDropBoxAndLogFsStat(db, timestamps, headers, -LOG_SIZE, "SYSTEM_FSCK");
logSystemServerShutdownTimeMetrics();
// 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, timestamps, headers, tombstoneFiles[i].getPath(),
LOG_SIZE, "SYSTEM_TOMBSTONE");
}
}
writeTimestamps(timestamps);
// 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.CREATE) {
@Override
public void onEvent(int event, String path) {
HashMap timestamps = readTimestamps();
try {
File file = new File(TOMBSTONE_DIR, path);
if (file.isFile() && file.getName().startsWith("tombstone_")) {
addFileToDropBox(db, timestamps, headers, file.getPath(), LOG_SIZE,
TAG_TOMBSTONE);
}
} catch (IOException e) {
Slog.e(TAG, "Can't log tombstone", e);
}
writeTimestamps(timestamps);
}
};
sTombstoneObserver.startWatching();
}
private static void addFileToDropBox(
DropBoxManager db, HashMap timestamps,
String headers, String filename, int maxSize, String tag) throws IOException {
addFileWithFootersToDropBox(db, timestamps, headers, "", filename, maxSize, tag);
}
private static void addFileWithFootersToDropBox(
DropBoxManager db, HashMap timestamps,
String headers, String footers, String filename, int maxSize,
String tag) throws IOException {
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 (timestamps.containsKey(filename) && timestamps.get(filename) == fileTime) {
return; // Already logged this particular file
}
timestamps.put(filename, fileTime);
String fileContents = FileUtils.readTextFile(file, maxSize, "[[TRUNCATED]]\n");
String text = headers + fileContents + footers;
// Create an additional report for system server native crashes, with a special tag.
if (tag.equals(TAG_TOMBSTONE) && fileContents.contains(">>> system_server <<<")) {
addTextToDropBox(db, "system_server_native_crash", text, filename, maxSize);
}
if (tag.equals(TAG_TOMBSTONE)) {
StatsLog.write(StatsLog.TOMB_STONE_OCCURRED);
}
addTextToDropBox(db, tag, text, filename, maxSize);
}
private static void addTextToDropBox(DropBoxManager db, String tag, String text,
String filename, int maxSize) {
Slog.i(TAG, "Copying " + filename + " to DropBox (" + tag + ")");
db.addText(tag, text);
EventLog.writeEvent(DropboxLogTags.DROPBOX_FILE_COPY, filename, maxSize, tag);
}
private static void addAuditErrorsToDropBox(DropBoxManager db,
HashMap timestamps, String headers, int maxSize, String tag)
throws IOException {
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) {
file = new File("/sys/fs/pstore/console-ramoops-0");
fileTime = file.lastModified();
}
}
if (fileTime <= 0) return; // File does not exist
if (timestamps.containsKey(tag) && timestamps.get(tag) == fileTime) {
return; // Already logged this particular file
}
timestamps.put(tag, fileTime);
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 void addFsckErrorsToDropBoxAndLogFsStat(DropBoxManager db,
HashMap timestamps, String headers, int maxSize, String tag)
throws IOException {
boolean uploadEnabled = true;
if (db == null || !db.isTagEnabled(tag)) {
uploadEnabled = false;
}
boolean uploadNeeded = false;
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");
Pattern pattern = Pattern.compile(FS_STAT_PATTERN);
String lines[] = log.split("\n");
int lineNumber = 0;
int lastFsStatLineNumber = 0;
for (String line : lines) { // should check all lines
if (line.contains(FSCK_FS_MODIFIED)) {
uploadNeeded = true;
} else if (line.contains("fs_stat")){
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
handleFsckFsStat(matcher, lines, lastFsStatLineNumber, lineNumber);
lastFsStatLineNumber = lineNumber;
} else {
Slog.w(TAG, "cannot parse fs_stat:" + line);
}
}
lineNumber++;
}
if (uploadEnabled && uploadNeeded ) {
addFileToDropBox(db, timestamps, headers, "/dev/fscklogs/log", maxSize, tag);
}
// Remove the file so we don't re-upload if the runtime restarts.
file.delete();
}
private static void logFsMountTime() {
for (String propPostfix : MOUNT_DURATION_PROPS_POSTFIX) {
int duration = SystemProperties.getInt("ro.boottime.init.mount_all." + propPostfix, 0);
if (duration != 0) {
MetricsLogger.histogram(null, "boot_mount_all_duration_" + propPostfix, duration);
}
}
}
// TODO b/64815357 Move to bootstat.cpp and log AbsoluteRebootTime
private static void logSystemServerShutdownTimeMetrics() {
File metricsFile = new File(SHUTDOWN_METRICS_FILE);
String metricsStr = null;
if (metricsFile.exists()) {
try {
metricsStr = FileUtils.readTextFile(metricsFile, 0, null);
} catch (IOException e) {
Slog.e(TAG, "Problem reading " + metricsFile, e);
}
}
if (!TextUtils.isEmpty(metricsStr)) {
String reboot = null;
String reason = null;
String start_time = null;
String duration = null;
String[] array = metricsStr.split(",");
for (String keyValueStr : array) {
String[] keyValue = keyValueStr.split(":");
if (keyValue.length != 2) {
Slog.e(TAG, "Wrong format of shutdown metrics - " + metricsStr);
continue;
}
// Ignore keys that are not indended for tron
if (keyValue[0].startsWith(SHUTDOWN_TRON_METRICS_PREFIX)) {
logTronShutdownMetric(keyValue[0], keyValue[1]);
if (keyValue[0].equals(METRIC_SYSTEM_SERVER)) {
duration = keyValue[1];
}
}
if (keyValue[0].equals("reboot")) {
reboot = keyValue[1];
} else if (keyValue[0].equals("reason")) {
reason = keyValue[1];
} else if (keyValue[0].equals(METRIC_SHUTDOWN_TIME_START)) {
start_time = keyValue[1];
}
}
logStatsdShutdownAtom(reboot, reason, start_time, duration);
}
metricsFile.delete();
}
private static void logTronShutdownMetric(String metricName, String valueStr) {
int value;
try {
value = Integer.parseInt(valueStr);
} catch (NumberFormatException e) {
Slog.e(TAG, "Cannot parse metric " + metricName + " int value - " + valueStr);
return;
}
if (value >= 0) {
MetricsLogger.histogram(null, metricName, value);
}
}
private static void logStatsdShutdownAtom(
String rebootStr, String reasonStr, String startStr, String durationStr) {
boolean reboot = false;
String reason = "";
long start = 0;
long duration = 0;
if (rebootStr != null) {
if (rebootStr.equals("y")) {
reboot = true;
} else if (!rebootStr.equals("n")) {
Slog.e(TAG, "Unexpected value for reboot : " + rebootStr);
}
} else {
Slog.e(TAG, "No value received for reboot");
}
if (reasonStr != null) {
reason = reasonStr;
} else {
Slog.e(TAG, "No value received for shutdown reason");
}
if (startStr != null) {
try {
start = Long.parseLong(startStr);
} catch (NumberFormatException e) {
Slog.e(TAG, "Cannot parse shutdown start time: " + startStr);
}
} else {
Slog.e(TAG, "No value received for shutdown start time");
}
if (durationStr != null) {
try {
duration = Long.parseLong(durationStr);
} catch (NumberFormatException e) {
Slog.e(TAG, "Cannot parse shutdown duration: " + startStr);
}
} else {
Slog.e(TAG, "No value received for shutdown duration");
}
StatsLog.write(StatsLog.SHUTDOWN_SEQUENCE_REPORTED, reboot, reason, start, duration);
}
private static void logFsShutdownTime() {
File f = null;
for (String fileName : LAST_KMSG_FILES) {
File file = new File(fileName);
if (!file.exists()) continue;
f = file;
break;
}
if (f == null) { // no last_kmsg
return;
}
final int maxReadSize = 16*1024;
// last_kmsg can be very big, so only parse the last part
String lines;
try {
lines = FileUtils.readTextFile(f, -maxReadSize, null);
} catch (IOException e) {
Slog.w(TAG, "cannot read last msg", e);
return;
}
Pattern pattern = Pattern.compile(LAST_SHUTDOWN_TIME_PATTERN, Pattern.MULTILINE);
Matcher matcher = pattern.matcher(lines);
if (matcher.find()) {
MetricsLogger.histogram(null, "boot_fs_shutdown_duration",
Integer.parseInt(matcher.group(1)));
MetricsLogger.histogram(null, "boot_fs_shutdown_umount_stat",
Integer.parseInt(matcher.group(2)));
Slog.i(TAG, "boot_fs_shutdown," + matcher.group(1) + "," + matcher.group(2));
} else { // not found
// This can happen when a device has too much kernel log after file system unmount
// ,exceeding maxReadSize. And having that much kernel logging can affect overall
// performance as well. So it is better to fix the kernel to reduce the amount of log.
MetricsLogger.histogram(null, "boot_fs_shutdown_umount_stat",
UMOUNT_STATUS_NOT_AVAILABLE);
Slog.w(TAG, "boot_fs_shutdown, string not found");
}
}
/**
* Fix fs_stat from e2fsck.
* For now, only handle the case of quota warning caused by tree optimization. Clear fs fix
* flag (=0x400) caused by that.
*
* @param partition partition name
* @param statOrg original stat reported from e2fsck log
* @param lines e2fsck logs broken down into lines
* @param startLineNumber start line to parse
* @param endLineNumber end line. exclusive.
* @return updated fs_stat. For tree optimization, will clear bit 0x400.
*/
@VisibleForTesting
public static int fixFsckFsStat(String partition, int statOrg, String[] lines,
int startLineNumber, int endLineNumber) {
int stat = statOrg;
if ((stat & FS_STAT_FS_FIXED) != 0) {
// fs was fixed. should check if quota warning was caused by tree optimization.
// This is not a real fix but optimization, so should not be counted as a fs fix.
Pattern passPattern = Pattern.compile(FSCK_PASS_PATTERN);
Pattern treeOptPattern = Pattern.compile(FSCK_TREE_OPTIMIZATION_PATTERN);
String currentPass = "";
boolean foundTreeOptimization = false;
boolean foundQuotaFix = false;
boolean foundTimestampAdjustment = false;
boolean foundOtherFix = false;
String otherFixLine = null;
for (int i = startLineNumber; i < endLineNumber; i++) {
String line = lines[i];
if (line.contains(FSCK_FS_MODIFIED)) { // no need to parse above this
break;
} else if (line.startsWith("Pass ")) {
Matcher matcher = passPattern.matcher(line);
if (matcher.find()) {
currentPass = matcher.group(1);
}
} else if (line.startsWith("Inode ")) {
Matcher matcher = treeOptPattern.matcher(line);
if (matcher.find() && currentPass.equals("1")) {
foundTreeOptimization = true;
Slog.i(TAG, "fs_stat, partition:" + partition + " found tree optimization:"
+ line);
} else {
foundOtherFix = true;
otherFixLine = line;
break;
}
} else if (line.startsWith("[QUOTA WARNING]") && currentPass.equals("5")) {
Slog.i(TAG, "fs_stat, partition:" + partition + " found quota warning:"
+ line);
foundQuotaFix = true;
if (!foundTreeOptimization) { // only quota warning, this is real fix.
otherFixLine = line;
break;
}
} else if (line.startsWith("Update quota info") && currentPass.equals("5")) {
// follows "[QUOTA WARNING]", ignore
} else if (line.startsWith("Timestamp(s) on inode") &&
line.contains("beyond 2310-04-04 are likely pre-1970") &&
currentPass.equals("1")) {
Slog.i(TAG, "fs_stat, partition:" + partition + " found timestamp adjustment:"
+ line);
// followed by next line, "Fix? yes"
if (lines[i + 1].contains("Fix? yes")) {
i++;
}
foundTimestampAdjustment = true;
} else {
line = line.trim();
// ignore empty msg or any msg before Pass 1
if (!line.isEmpty() && !currentPass.isEmpty()) {
foundOtherFix = true;
otherFixLine = line;
break;
}
}
}
if (foundOtherFix) {
if (otherFixLine != null) {
Slog.i(TAG, "fs_stat, partition:" + partition + " fix:" + otherFixLine);
}
} else if (foundQuotaFix && !foundTreeOptimization) {
Slog.i(TAG, "fs_stat, got quota fix without tree optimization, partition:" +
partition);
} else if ((foundTreeOptimization && foundQuotaFix) || foundTimestampAdjustment) {
// not a real fix, so clear it.
Slog.i(TAG, "fs_stat, partition:" + partition + " fix ignored");
stat &= ~FS_STAT_FS_FIXED;
}
}
return stat;
}
private static void handleFsckFsStat(Matcher match, String[] lines, int startLineNumber,
int endLineNumber) {
String partition = match.group(1);
int stat;
try {
stat = Integer.decode(match.group(2));
} catch (NumberFormatException e) {
Slog.w(TAG, "cannot parse fs_stat: partition:" + partition + " stat:" + match.group(2));
return;
}
stat = fixFsckFsStat(partition, stat, lines, startLineNumber, endLineNumber);
MetricsLogger.histogram(null, "boot_fs_stat_" + partition, stat);
Slog.i(TAG, "fs_stat, partition:" + partition + " stat:0x" + Integer.toHexString(stat));
}
private static HashMap readTimestamps() {
synchronized (sFile) {
HashMap timestamps = new HashMap();
boolean success = false;
try (final FileInputStream stream = sFile.openRead()) {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(stream, StandardCharsets.UTF_8.name());
int type;
while ((type = parser.next()) != XmlPullParser.START_TAG
&& type != XmlPullParser.END_DOCUMENT) {
;
}
if (type != XmlPullParser.START_TAG) {
throw new IllegalStateException("no start tag found");
}
int outerDepth = parser.getDepth(); // Skip the outer tag.
while ((type = parser.next()) != XmlPullParser.END_DOCUMENT
&& (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) {
if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
continue;
}
String tagName = parser.getName();
if (tagName.equals("log")) {
final String filename = parser.getAttributeValue(null, "filename");
final long timestamp = Long.valueOf(parser.getAttributeValue(
null, "timestamp"));
timestamps.put(filename, timestamp);
} else {
Slog.w(TAG, "Unknown tag: " + parser.getName());
XmlUtils.skipCurrentTag(parser);
}
}
success = true;
} catch (FileNotFoundException e) {
Slog.i(TAG, "No existing last log timestamp file " + sFile.getBaseFile() +
"; starting empty");
} catch (IOException e) {
Slog.w(TAG, "Failed parsing " + e);
} catch (IllegalStateException e) {
Slog.w(TAG, "Failed parsing " + e);
} catch (NullPointerException e) {
Slog.w(TAG, "Failed parsing " + e);
} catch (XmlPullParserException e) {
Slog.w(TAG, "Failed parsing " + e);
} finally {
if (!success) {
timestamps.clear();
}
}
return timestamps;
}
}
private void writeTimestamps(HashMap timestamps) {
synchronized (sFile) {
final FileOutputStream stream;
try {
stream = sFile.startWrite();
} catch (IOException e) {
Slog.w(TAG, "Failed to write timestamp file: " + e);
return;
}
try {
XmlSerializer out = new FastXmlSerializer();
out.setOutput(stream, StandardCharsets.UTF_8.name());
out.startDocument(null, true);
out.startTag(null, "log-files");
Iterator itor = timestamps.keySet().iterator();
while (itor.hasNext()) {
String filename = itor.next();
out.startTag(null, "log");
out.attribute(null, "filename", filename);
out.attribute(null, "timestamp", timestamps.get(filename).toString());
out.endTag(null, "log");
}
out.endTag(null, "log-files");
out.endDocument();
sFile.finishWrite(stream);
} catch (IOException e) {
Slog.w(TAG, "Failed to write timestamp file, using the backup: " + e);
sFile.failWrite(stream);
}
}
}
}
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