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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 int
usage(int argc,const char ** argv)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
perform_full_backup()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
perform_list(const char * filename)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 
perform_print(const char * entityname,const char * filename)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
main(int argc,const char ** argv)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