backup.cpp revision cfedceb8c180a2e176154d461659e0c3569dc931 
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
24using namespace android;
25
26#include <unistd.h>
27
28static 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
46static int perform_full_backup()
47{
48    printf("this would have written all of your data to stdout\n");
49    return 0;
50}
51
52static 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 (%d 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
95static int perform_print(const char* entityname, const char* filename)
96{
97    printf("perform_print(%s, %s);", entityname, filename);
98    return 0;
99}
100
101int 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