1 /*
2 * Copyright (C) 2019 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 <getopt.h>
18 #include <sysexits.h>
19
20 #include <libvbmeta/libvbmeta.h>
21
22 using android::fs_mgr::WriteToSuperVBMetaFile;
23
24 /* Prints program usage to |where|. */
usage(int,char * argv[])25 static int usage(int /* argc */, char* argv[]) {
26 fprintf(stderr,
27 "%s - command-line tool for creating Super VBMeta Image.\n"
28 "\n"
29 "Usage:\n"
30 " %s [options]\n"
31 "\n"
32 "Required options:\n"
33 " -o,--output=FILE Output file.\n"
34 "\n"
35 "Optional:\n"
36 " -i,--image=VBMETA_NAME=FILE include the given vbmeta file as\n"
37 " initial data for the super vbmeta.\n",
38 argv[0], argv[0]);
39 return EX_USAGE;
40 }
41
main(int argc,char * argv[])42 int main(int argc, char* argv[]) {
43 struct option options[] = {
44 { "help", no_argument, nullptr, 'h' },
45 { "image", required_argument, nullptr, 'i' },
46 { "output", required_argument, nullptr, 'o' },
47 { nullptr, 0, nullptr, 0 },
48 };
49
50 std::string output_path;
51 std::map<std::string, std::string> images;
52
53 int rv;
54 while ((rv = getopt_long_only(argc, argv, "i:o:", options, NULL)) != -1) {
55 switch (rv) {
56 case 'h':
57 return usage(argc, argv);
58 case 'i':
59 {
60 char* separator = strchr(optarg, '=');
61 if (!separator || separator == optarg || !strlen(separator + 1)) {
62 fprintf(stderr, "Expected VBMETA_NAME=FILE.\n");
63 return EX_USAGE;
64 }
65 *separator = '\0';
66
67 std::string vbmeta_name(optarg);
68 std::string file(separator + 1);
69 images[vbmeta_name] = file;
70 break;
71 }
72 case 'o':
73 output_path = optarg;
74 break;
75 default:
76 break;
77 }
78 }
79
80 // Check for empty arguments so we can print a more helpful message rather
81 // than error on each individual missing argument.
82 if (optind == 1) {
83 return usage(argc, argv);
84 }
85
86 if (output_path.empty()) {
87 fprintf(stderr, "--output must specify a valid path.\n");
88 return EX_USAGE;
89 }
90
91 if (!WriteToSuperVBMetaFile(output_path.c_str(), images)) {
92 return EX_CANTCREAT;
93 }
94
95 return EX_OK;
96 }
97