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 <stdint.h>
19 #include <stdlib.h>
20
21 #include <iostream>
22 #include <map>
23 #include <memory>
24 #include <optional>
25 #include <string>
26 #include <string_view>
27
28 #include <android-base/logging.h>
29 #include <android-base/parseint.h>
30
31 #include "misc_writer/misc_writer.h"
32
33 using namespace std::string_literals;
34 using android::hardware::google::pixel::MiscWriter;
35 using android::hardware::google::pixel::MiscWriterActions;
36
Usage(std::string_view name)37 static int Usage(std::string_view name) {
38 std::cerr << name << " usage:\n";
39 std::cerr << name << " [--override-vendor-space-offset <offset>] --<misc_writer_action>\n";
40 std::cerr << "Supported misc_writer_action is one of: \n";
41 std::cerr << " --set-dark-theme Write the dark theme flag\n";
42 std::cerr << " --clear-dark-theme Clear the dark theme flag\n";
43 std::cerr << " --set-sota Write the silent OTA flag\n";
44 std::cerr << " --clear-sota Clear the silent OTA flag\n";
45 std::cerr << " --set-enable-pkvm Write the enable pKVM flag\n";
46 std::cerr << " --set-disable-pkvm Write the disable pKVM flag\n";
47 std::cerr << "Writes the given hex string to the specified offset in vendor space in /misc "
48 "partition.\nDefault offset is used for each action unless "
49 "--override-vendor-space-offset is specified.\n";
50 return EXIT_FAILURE;
51 }
52
53 // misc_writer is a vendor tool that writes data to the vendor space in /misc.
main(int argc,char ** argv)54 int main(int argc, char** argv) {
55 constexpr struct option OPTIONS[] = {
56 { "set-dark-theme", no_argument, nullptr, 0 },
57 { "clear-dark-theme", no_argument, nullptr, 0 },
58 { "set-sota", no_argument, nullptr, 0 },
59 { "clear-sota", no_argument, nullptr, 0 },
60 { "override-vendor-space-offset", required_argument, nullptr, 0 },
61 { "set-enable-pkvm", no_argument, nullptr, 0 },
62 { "set-disable-pkvm", no_argument, nullptr, 0 },
63 { nullptr, 0, nullptr, 0 },
64 };
65
66 std::map<std::string, MiscWriterActions> action_map{
67 { "set-dark-theme", MiscWriterActions::kSetDarkThemeFlag },
68 { "clear-dark-theme", MiscWriterActions::kClearDarkThemeFlag },
69 { "set-sota", MiscWriterActions::kSetSotaFlag },
70 { "clear-sota", MiscWriterActions::kClearSotaFlag },
71 { "set-enable-pkvm", MiscWriterActions::kSetEnablePkvmFlag },
72 { "set-disable-pkvm", MiscWriterActions::kSetDisablePkvmFlag },
73 };
74
75 std::unique_ptr<MiscWriter> misc_writer;
76 std::optional<size_t> override_offset;
77
78 int arg;
79 int option_index = 0;
80 while ((arg = getopt_long(argc, argv, "", OPTIONS, &option_index)) != -1) {
81 if (arg != 0) {
82 LOG(ERROR) << "Invalid command argument";
83 return Usage(argv[0]);
84 }
85 auto option_name = OPTIONS[option_index].name;
86 if (option_name == "override-vendor-space-offset"s) {
87 LOG(WARNING) << "Overriding the vendor space offset in misc partition to " << optarg;
88 size_t offset;
89 if (!android::base::ParseUint(optarg, &offset)) {
90 LOG(ERROR) << "Failed to parse the offset: " << optarg;
91 return Usage(argv[0]);
92 }
93 override_offset = offset;
94 } else if (auto iter = action_map.find(option_name); iter != action_map.end()) {
95 if (misc_writer) {
96 LOG(ERROR) << "Misc writer action has already been set";
97 return Usage(argv[0]);
98 }
99 misc_writer = std::make_unique<MiscWriter>(iter->second);
100 } else {
101 LOG(FATAL) << "Unreachable path, option_name: " << option_name;
102 }
103 }
104
105 if (!misc_writer) {
106 LOG(ERROR) << "An action must be specified for misc writer";
107 return Usage(argv[0]);
108 }
109
110 if (!misc_writer->PerformAction(override_offset)) {
111 return EXIT_FAILURE;
112 }
113
114 return EXIT_SUCCESS;
115 }
116