Examples with StructStat libcore.io.StructStat used on opensource projects

Example 1 with StructStat

use of libcore.io.StructStat in project android_frameworks_base by ParanoidAndroid.

the class BackupAgent method fullBackupFileTree.

/**
     * Scan the dir tree (if it actually exists) and process each entry we find.  If the
     * 'excludes' parameter is non-null, it is consulted each time a new file system entity
     * is visited to see whether that entity (and its subtree, if appropriate) should be
     * omitted from the backup process.
     *
     * @hide
     */
protected final void fullBackupFileTree(String packageName, String domain, String rootPath, HashSet<String> excludes, FullBackupDataOutput output) {
    File rootFile = new File(rootPath);
    if (rootFile.exists()) {
        LinkedList<File> scanQueue = new LinkedList<File>();
        scanQueue.add(rootFile);
        while (scanQueue.size() > 0) {
            File file = scanQueue.remove(0);
            String filePath;
            try {
                filePath = file.getCanonicalPath();
                // prune this subtree?
                if (excludes != null && excludes.contains(filePath)) {
                    continue;
                }
                // If it's a directory, enqueue its contents for scanning.
                StructStat stat = Libcore.os.lstat(filePath);
                if (OsConstants.S_ISLNK(stat.st_mode)) {
                    if (DEBUG)
                        Log.i(TAG, "Symlink (skipping)!: " + file);
                    continue;
                } else if (OsConstants.S_ISDIR(stat.st_mode)) {
                    File[] contents = file.listFiles();
                    if (contents != null) {
                        for (File entry : contents) {
                            scanQueue.add(0, entry);
                        }
                    }
                }
            } catch (IOException e) {
                if (DEBUG)
                    Log.w(TAG, "Error canonicalizing path of " + file);
                continue;
            } catch (ErrnoException e) {
                if (DEBUG)
                    Log.w(TAG, "Error scanning file " + file + " : " + e);
                continue;
            }
            // Finally, back this file up before proceeding
            FullBackup.backupToTar(packageName, domain, null, rootPath, filePath, output.getData());
        }
    }
}

Example 2 with StructStat

use of libcore.io.StructStat in project android_frameworks_base by ParanoidAndroid.

the class SharedPreferencesImpl method loadFromDiskLocked.

private void loadFromDiskLocked() {
    if (mLoaded) {
        return;
    }
    if (mBackupFile.exists()) {
        mFile.delete();
        mBackupFile.renameTo(mFile);
    }
    // Debugging
    if (mFile.exists() && !mFile.canRead()) {
        Log.w(TAG, "Attempt to read preferences file " + mFile + " without permission");
    }
    Map map = null;
    StructStat stat = null;
    try {
        stat = Libcore.os.stat(mFile.getPath());
        if (mFile.canRead()) {
            BufferedInputStream str = null;
            try {
                str = new BufferedInputStream(new FileInputStream(mFile), 16 * 1024);
                map = XmlUtils.readMapXml(str);
            } catch (XmlPullParserException e) {
                Log.w(TAG, "getSharedPreferences", e);
            } catch (FileNotFoundException e) {
                Log.w(TAG, "getSharedPreferences", e);
            } catch (IOException e) {
                Log.w(TAG, "getSharedPreferences", e);
            } finally {
                IoUtils.closeQuietly(str);
            }
        }
    } catch (ErrnoException e) {
    }
    mLoaded = true;
    if (map != null) {
        mMap = map;
        mStatTimestamp = stat.st_mtime;
        mStatSize = stat.st_size;
    } else {
        mMap = new HashMap<String, Object>();
    }
    notifyAll();
}

Example 3 with StructStat

use of libcore.io.StructStat in project android_frameworks_base by ParanoidAndroid.

the class SharedPreferencesImpl method hasFileChangedUnexpectedly.

// Has the file changed out from under us?  i.e. writes that
// we didn't instigate.
private boolean hasFileChangedUnexpectedly() {
    synchronized (this) {
        if (mDiskWritesInFlight > 0) {
            // If we know we caused it, it's not unexpected.
            if (DEBUG)
                Log.d(TAG, "disk write in flight, not unexpected.");
            return false;
        }
    }
    final StructStat stat;
    try {
        /*
             * Metadata operations don't usually count as a block guard
             * violation, but we explicitly want this one.
             */
        BlockGuard.getThreadPolicy().onReadFromDisk();
        stat = Libcore.os.stat(mFile.getPath());
    } catch (ErrnoException e) {
        return true;
    }
    synchronized (this) {
        return mStatTimestamp != stat.st_mtime || mStatSize != stat.st_size;
    }
}

Example 4 with StructStat

use of libcore.io.StructStat in project android_frameworks_base by ParanoidAndroid.

the class PackageManagerTests method assertDirOwnerGroupPerms.

private void assertDirOwnerGroupPerms(String reason, int uid, int gid, int perms, String path) {
    final StructStat stat;
    try {
        stat = Libcore.os.lstat(path);
    } catch (ErrnoException e) {
        throw new AssertionError(reason + "\n" + "Got: " + path + " does not exist");
    }
    StringBuilder sb = new StringBuilder();
    if (!S_ISDIR(stat.st_mode)) {
        sb.append("\nExpected type: ");
        sb.append(S_IFDIR);
        sb.append("\ngot type: ");
        sb.append((stat.st_mode & S_IFMT));
    }
    if (stat.st_uid != uid) {
        sb.append("\nExpected owner: ");
        sb.append(uid);
        sb.append("\nGot owner: ");
        sb.append(stat.st_uid);
    }
    if (stat.st_gid != gid) {
        sb.append("\nExpected group: ");
        sb.append(gid);
        sb.append("\nGot group: ");
        sb.append(stat.st_gid);
    }
    if ((stat.st_mode & ~S_IFMT) != perms) {
        sb.append("\nExpected permissions: ");
        sb.append(Integer.toOctalString(perms));
        sb.append("\nGot permissions: ");
        sb.append(Integer.toOctalString(stat.st_mode & ~S_IFMT));
    }
    if (sb.length() > 0) {
        throw new AssertionError(reason + sb.toString());
    }
}

Example 5 with StructStat

use of libcore.io.StructStat in project android_frameworks_base by ParanoidAndroid.

the class SharedPreferencesImpl method writeToFile.

// Note: must hold mWritingToDiskLock
private void writeToFile(MemoryCommitResult mcr) {
    // Rename the current file so it may be used as a backup during the next read
    if (mFile.exists()) {
        if (!mcr.changesMade) {
            // If the file already exists, but no changes were
            // made to the underlying map, it's wasteful to
            // re-write the file.  Return as if we wrote it
            // out.
            mcr.setDiskWriteResult(true);
            return;
        }
        if (!mBackupFile.exists()) {
            if (!mFile.renameTo(mBackupFile)) {
                Log.e(TAG, "Couldn't rename file " + mFile + " to backup file " + mBackupFile);
                mcr.setDiskWriteResult(false);
                return;
            }
        } else {
            mFile.delete();
        }
    }
    // from the backup.
    try {
        FileOutputStream str = createFileOutputStream(mFile);
        if (str == null) {
            mcr.setDiskWriteResult(false);
            return;
        }
        XmlUtils.writeMapXml(mcr.mapToWriteToDisk, str);
        FileUtils.sync(str);
        str.close();
        ContextImpl.setFilePermissionsFromMode(mFile.getPath(), mMode, 0);
        try {
            final StructStat stat = Libcore.os.stat(mFile.getPath());
            synchronized (this) {
                mStatTimestamp = stat.st_mtime;
                mStatSize = stat.st_size;
            }
        } catch (ErrnoException e) {
        // Do nothing
        }
        // Writing was successful, delete the backup file if there is one.
        mBackupFile.delete();
        mcr.setDiskWriteResult(true);
        return;
    } catch (XmlPullParserException e) {
        Log.w(TAG, "writeToFile: Got exception:", e);
    } catch (IOException e) {
        Log.w(TAG, "writeToFile: Got exception:", e);
    }
    // Clean up an unsuccessfully written file
    if (mFile.exists()) {
        if (!mFile.delete()) {
            Log.e(TAG, "Couldn't clean up partially-written file " + mFile);
        }
    }
    mcr.setDiskWriteResult(false);
}