Consolidate the vendor space misc usage for Pixels
The layout of the vendor space /misc partition was pretty confusing and
lead to some usage conflicts. To formalize the layout, we create a pixel
specific library with the definition & offset of various flags. The new
library also handles the R/W. As a result, we will leave system domain
/misc definitions in the libbootloader_message.
We also switch the misc_writer binary to use more specific options
instead of writing an arbitrary hex string. So we can avoid redefining
the string & offset in both init script and recovery ui.
Bug: 131775112
Test: unit tests pass, run misc_writer and check contents of /misc
Change-Id: I00f8842a81d1929e31a1de4d5eb09575ffad47c0
diff --git a/misc_writer/misc_writer_main.cpp b/misc_writer/misc_writer_main.cpp
new file mode 100644
index 0000000..69a9fe3
--- /dev/null
+++ b/misc_writer/misc_writer_main.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <getopt.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include <iostream>
+#include <map>
+#include <memory>
+#include <optional>
+#include <string>
+#include <string_view>
+
+#include <android-base/logging.h>
+#include <android-base/parseint.h>
+
+#include "misc_writer/misc_writer.h"
+
+using namespace std::string_literals;
+using android::hardware::google::pixel::MiscWriter;
+using android::hardware::google::pixel::MiscWriterActions;
+
+static int Usage(std::string_view name) {
+ std::cerr << name << " usage:\n";
+ std::cerr << name << " [--override-vendor-space-offset <offset>] --<misc_writer_action>\n";
+ std::cerr << "Supported misc_writer_action is one of: \n";
+ std::cerr << " --set-dark-theme Write the dark theme flag\n";
+ std::cerr << " --clear-dark-theme Clear the dark theme flag\n";
+ std::cerr << " --set-sota Write the silent OTA flag\n";
+ std::cerr << " --clear-sota Clear the silent OTA flag\n";
+ std::cerr << "Writes the given hex string to the specified offset in vendor space in /misc "
+ "partition.\nDefault offset is used for each action unless "
+ "--override-vendor-space-offset is specified.\n";
+ return EXIT_FAILURE;
+}
+
+// misc_writer is a vendor tool that writes data to the vendor space in /misc.
+int main(int argc, char** argv) {
+ constexpr struct option OPTIONS[] = {
+ { "set-dark-theme", no_argument, nullptr, 0 },
+ { "clear-dark-theme", no_argument, nullptr, 0 },
+ { "set-sota", no_argument, nullptr, 0 },
+ { "clear-sota", no_argument, nullptr, 0 },
+ { "override-vendor-space-offset", required_argument, nullptr, 0 },
+ { nullptr, 0, nullptr, 0 },
+ };
+
+ std::map<std::string, MiscWriterActions> action_map{
+ { "set-dark-theme", MiscWriterActions::kSetDarkThemeFlag },
+ { "clear-dark-theme", MiscWriterActions::kClearDarkThemeFlag },
+ { "set-sota", MiscWriterActions::kSetSotaFlag },
+ { "clear-sota", MiscWriterActions::kClearSotaFlag },
+ };
+
+ std::unique_ptr<MiscWriter> misc_writer;
+ std::optional<size_t> override_offset;
+
+ int arg;
+ int option_index = 0;
+ while ((arg = getopt_long(argc, argv, "", OPTIONS, &option_index)) != -1) {
+ if (arg != 0) {
+ LOG(ERROR) << "Invalid command argument";
+ return Usage(argv[0]);
+ }
+ auto option_name = OPTIONS[option_index].name;
+ if (option_name == "override-vendor-space-offset"s) {
+ LOG(WARNING) << "Overriding the vendor space offset in misc partition to " << optarg;
+ size_t offset;
+ if (!android::base::ParseUint(optarg, &offset)) {
+ LOG(ERROR) << "Failed to parse the offset: " << optarg;
+ return Usage(argv[0]);
+ }
+ override_offset = offset;
+ } else if (auto iter = action_map.find(option_name); iter != action_map.end()) {
+ if (misc_writer) {
+ LOG(ERROR) << "Misc writer action has already been set";
+ return Usage(argv[0]);
+ }
+ misc_writer = std::make_unique<MiscWriter>(iter->second);
+ } else {
+ LOG(FATAL) << "Unreachable path, option_name: " << option_name;
+ }
+ }
+
+ if (!misc_writer) {
+ LOG(ERROR) << "An action must be specified for misc writer";
+ return Usage(argv[0]);
+ }
+
+ if (!misc_writer->PerformAction(override_offset)) {
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+}