Merge change 2099 into donut

# Copyright 2009 The Android Open Source Project

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_SRC_FILES:= backup.cpp

LOCAL_SHARED_LIBRARIES := libcutils libc libutils

LOCAL_MODULE:= btool

LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)

LOCAL_MODULE_TAGS := debug

include $(BUILD_EXECUTABLE)

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#include <utils/backup_helpers.h>

#include <utils/String8.h>

#include <fcntl.h>

#include <stdio.h>

#include <string.h>

using namespace android;

#include <unistd.h>

int

usage(int argc, const char** argv)

{

    const char* p = argv[0];

    fprintf(stderr, "%s: Backs up your data.\n"

                    "\n"

                    "usage: %s\n"

                    "  Prints all of the data that can be backed up to stdout.\n"

                    "\n"

                    "usage: %s list FILE\n"

                    "  Lists the backup entities in the file.\n"

                    "\n"

                    "usage: %s print NAME FILE\n"

                    "  Prints the entity named NAME in FILE.\n",

                    p, p, p, p);

    return 1;

}

int

perform_full_backup()

{

    printf("this would have written all of your data to stdout\n");

    return 0;

}

int

perform_list(const char* filename)

{

    int err;

    int fd;

    fd = open(filename, O_RDONLY);

    if (fd == -1) {

        fprintf(stderr, "Error opening: %s\n", filename);

        return 1;

    }

    BackupDataReader reader(fd);

    int type;

    while (reader.ReadNextHeader(&type) == 0) {

        switch (type) {

            case BACKUP_HEADER_APP_V1:

            {

                String8 packageName;

                int cookie;

                err = reader.ReadAppHeader(&packageName, &cookie);

                if (err == 0) {

                    printf("App header: %s 0x%08x (%d)\n", packageName.string(), cookie, cookie);

                } else {

                    printf("Error reading app header\n");

                }

                break;

            }

            case BACKUP_HEADER_ENTITY_V1:

            {

                String8 key;

                size_t dataSize;

                err = reader.ReadEntityHeader(&key, &dataSize);

                if (err == 0) {

                    printf("   entity: %s (%d bytes)\n", key.string(), dataSize);

                } else {

                    printf("   Error reading entity header\n");

                }

                break;

            }

            case BACKUP_FOOTER_APP_V1:

            {

                int cookie;

                err = reader.ReadAppFooter(&cookie);

                if (err == 0) {

                    printf("   App footer: 0x%08x (%d)\n", cookie, cookie);

                } else {

                    printf("   Error reading entity header\n");

                }

                break;

            }

            default:

            {

                printf("Unknown chunk type: 0x%08x\n", type);

                break;

            }

        }

    }

    return 0;

}

int perform_print(const char* entityname, const char* filename)

{

    printf("perform_print(%s, %s);", entityname, filename);

    return 0;

}

int

main(int argc, const char** argv)

{

    if (argc <= 1) {

        return perform_full_backup();

    }

    if (argc == 3 && 0 == strcmp(argv[1], "list")) {

        return perform_list(argv[2]);

    }

    if (argc == 4 && 0 == strcmp(argv[1], "print")) {

        return perform_print(argv[2], argv[3]);

    }

    return usage(argc, argv);

}

/** @hide */

public class BackupDataOutput {

    /* package */ FileDescriptor fd;

    int mBackupWriter;

    private Context mContext;

    public static final int OP_UPDATE = 1;

    public static final int OP_DELETE = 2;

    public BackupDataOutput(Context context, FileDescriptor fd) {

        this.fd = fd;

        mContext = context;

        if (fd == null) throw new NullPointerException();

        mBackupWriter = ctor(fd);

        if (mBackupWriter == 0) {

            throw new RuntimeException("Native initialization failed with fd=" + fd);

        }

    }

    public void close() {

        // do we close the fd?

    protected void finalize() throws Throwable {

        try {

            dtor(mBackupWriter);

        } finally {

            super.finalize();

        }

    }

    public native void flush();

    public native void write(byte[] buffer);

    public native void write(int oneByte);

    public native void write(byte[] buffer, int offset, int count);

    public native void writeOperation(int op);

    public native void writeKey(String key);

    private native static int ctor(FileDescriptor fd);

    private native static void dtor(int mBackupWriter);

}

        }

        // oldStateFd can be null

        FileDescriptor oldStateFd = oldState != null ? oldState.getFileDescriptor() : null;

        if (data.fd == null) {

            throw new NullPointerException();

        }

        FileDescriptor newStateFd = newState.getFileDescriptor();

        if (newStateFd == null) {

            throw new NullPointerException();

        }

        int err = performBackup_native(basePath, oldStateFd, data.fd, newStateFd, files);

        int err = performBackup_native(basePath, oldStateFd, data.mBackupWriter, newStateFd, files);

        if (err != 0) {

            throw new RuntimeException("Backup failed"); // TODO: more here

    }

    native private static int performBackup_native(String basePath, FileDescriptor oldState,

            FileDescriptor data, FileDescriptor newState, String[] files);

            int data, FileDescriptor newState, String[] files);

}