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/*
* 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 <errno.h>
#include <getopt.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <string>
#include <string_view>
#include <vector>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <bootloader_message/bootloader_message.h>
using namespace std::string_literals;
static std::vector<uint8_t> ParseHexString(std::string_view hex_string) {
auto length = hex_string.size();
if (length % 2 != 0 || length == 0) {
return {};
}
std::vector<uint8_t> result(length / 2);
for (size_t i = 0; i < length / 2; i++) {
auto sub = "0x" + std::string(hex_string.substr(i * 2, 2));
if (!android::base::ParseUint(sub, &result[i])) {
return {};
}
}
return result;
}
static int Usage(std::string_view name) {
std::cerr << name << " usage:\n";
std::cerr << name << " [--vendor-space-offset <offset>] --hex-string 0xABCDEF\n";
std::cerr << "Writes the given hex string to the specified offset in vendor space in /misc "
"partition. Offset defaults to 0 if unspecified.\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[] = {
{ "vendor-space-offset", required_argument, nullptr, 0 },
{ "hex-string", required_argument, nullptr, 0 },
{ nullptr, 0, nullptr, 0 },
};
// Offset defaults to 0 if unspecified.
size_t offset = 0;
std::string_view hex_string;
int arg;
int option_index;
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 == "vendor-space-offset"s) {
if (!android::base::ParseUint(optarg, &offset)) {
LOG(ERROR) << "Failed to parse the offset: " << optarg;
return Usage(argv[0]);
}
} else if (option_name == "hex-string"s) {
hex_string = optarg;
}
}
if (hex_string.starts_with("0x") || hex_string.starts_with("0X")) {
hex_string = hex_string.substr(2);
}
if (hex_string.empty()) {
LOG(ERROR) << "Invalid input hex string: " << hex_string;
return Usage(argv[0]);
}
auto data = ParseHexString(hex_string);
if (data.empty()) {
LOG(ERROR) << "Failed to parse the input hex string: " << hex_string;
return EXIT_FAILURE;
}
if (std::string err; !WriteMiscPartitionVendorSpace(data.data(), data.size(), offset, &err)) {
LOG(ERROR) << "Failed to write to misc partition: " << err;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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