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      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 
     17 #include <androidfw/BackupHelpers.h>
     18 #include <utils/String8.h>
     19 
     20 #include <fcntl.h>
     21 #include <stdio.h>
     22 #include <string.h>
     23 
     24 using namespace android;
     25 
     26 #include <unistd.h>
     27 
     28 static int usage(int /* argc */, const char** argv)
     29 {
     30     const char* p = argv[0];
     31 
     32     fprintf(stderr, "%s: Backs up your data.\n"
     33                     "\n"
     34                     "usage: %s\n"
     35                     "  Prints all of the data that can be backed up to stdout.\n"
     36                     "\n"
     37                     "usage: %s list FILE\n"
     38                     "  Lists the backup entities in the file.\n"
     39                     "\n"
     40                     "usage: %s print NAME FILE\n"
     41                     "  Prints the entity named NAME in FILE.\n",
     42                     p, p, p, p);
     43     return 1;
     44 }
     45 
     46 static int perform_full_backup()
     47 {
     48     printf("this would have written all of your data to stdout\n");
     49     return 0;
     50 }
     51 
     52 static int perform_list(const char* filename)
     53 {
     54     int err;
     55     int fd;
     56 
     57     fd = open(filename, O_RDONLY);
     58     if (fd == -1) {
     59         fprintf(stderr, "Error opening: %s\n", filename);
     60         return 1;
     61     }
     62 
     63     BackupDataReader reader(fd);
     64     bool done;
     65     int type;
     66 
     67     while (reader.ReadNextHeader(&done, &type) == 0) {
     68         if (done) {
     69             break;
     70         }
     71         switch (type) {
     72             case BACKUP_HEADER_ENTITY_V1:
     73             {
     74                 String8 key;
     75                 size_t dataSize;
     76                 err = reader.ReadEntityHeader(&key, &dataSize);
     77                 if (err == 0) {
     78                     printf("   entity: %s (%zu bytes)\n", key.string(), dataSize);
     79                 } else {
     80                     printf("   Error reading entity header\n");
     81                 }
     82                 break;
     83             }
     84             default:
     85             {
     86                 printf("Unknown chunk type: 0x%08x\n", type);
     87                 break;
     88             }
     89         }
     90     }
     91 
     92     return 0;
     93 }
     94 
     95 static int perform_print(const char* entityname, const char* filename)
     96 {
     97     printf("perform_print(%s, %s);", entityname, filename);
     98     return 0;
     99 }
    100 
    101 int main(int argc, const char** argv)
    102 {
    103     if (argc <= 1) {
    104         return perform_full_backup();
    105     }
    106     if (argc == 3 && 0 == strcmp(argv[1], "list")) {
    107         return perform_list(argv[2]);
    108     }
    109     if (argc == 4 && 0 == strcmp(argv[1], "print")) {
    110         return perform_print(argv[2], argv[3]);
    111     }
    112     return usage(argc, argv);
    113 }
    114 
    115