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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 <utils/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 int
     29 usage(int argc, const char** argv)
     30 {
     31     const char* p = argv[0];
     32 
     33     fprintf(stderr, "%s: Backs up your data.\n"
     34                     "\n"
     35                     "usage: %s\n"
     36                     "  Prints all of the data that can be backed up to stdout.\n"
     37                     "\n"
     38                     "usage: %s list FILE\n"
     39                     "  Lists the backup entities in the file.\n"
     40                     "\n"
     41                     "usage: %s print NAME FILE\n"
     42                     "  Prints the entity named NAME in FILE.\n",
     43                     p, p, p, p);
     44     return 1;
     45 }
     46 
     47 int
     48 perform_full_backup()
     49 {
     50     printf("this would have written all of your data to stdout\n");
     51     return 0;
     52 }
     53 
     54 int
     55 perform_list(const char* filename)
     56 {
     57     int err;
     58     int fd;
     59 
     60     fd = open(filename, O_RDONLY);
     61     if (fd == -1) {
     62         fprintf(stderr, "Error opening: %s\n", filename);
     63         return 1;
     64     }
     65 
     66     BackupDataReader reader(fd);
     67     bool done;
     68     int type;
     69 
     70     while (reader.ReadNextHeader(&done, &type) == 0) {
     71         if (done) {
     72             break;
     73         }
     74         switch (type) {
     75             case BACKUP_HEADER_ENTITY_V1:
     76             {
     77                 String8 key;
     78                 size_t dataSize;
     79                 err = reader.ReadEntityHeader(&key, &dataSize);
     80                 if (err == 0) {
     81                     printf("   entity: %s (%d bytes)\n", key.string(), dataSize);
     82                 } else {
     83                     printf("   Error reading entity header\n");
     84                 }
     85                 break;
     86             }
     87             default:
     88             {
     89                 printf("Unknown chunk type: 0x%08x\n", type);
     90                 break;
     91             }
     92         }
     93     }
     94 
     95     return 0;
     96 }
     97 
     98 int perform_print(const char* entityname, const char* filename)
     99 {
    100     printf("perform_print(%s, %s);", entityname, filename);
    101     return 0;
    102 }
    103 
    104 int
    105 main(int argc, const char** argv)
    106 {
    107     if (argc <= 1) {
    108         return perform_full_backup();
    109     }
    110     if (argc == 3 && 0 == strcmp(argv[1], "list")) {
    111         return perform_list(argv[2]);
    112     }
    113     if (argc == 4 && 0 == strcmp(argv[1], "print")) {
    114         return perform_print(argv[2], argv[3]);
    115     }
    116     return usage(argc, argv);
    117 }
    118 
    119