fastboot/device/variables.cpp - third_party/android/platform/system/core - Git at Google

 /*
  * Copyright (C) 2018 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 "variables.h"

 #include <inttypes.h>

 #include <android-base/file.h>
 #include <android-base/logging.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <ext4_utils/ext4_utils.h>
 #include <healthhalutils/HealthHalUtils.h>

 #include "fastboot_device.h"
 #include "flashing.h"
 #include "utility.h"

 using ::android::hardware::boot::V1_0::BoolResult;
 using ::android::hardware::boot::V1_0::Slot;
 using ::android::hardware::fastboot::V1_0::FileSystemType;
 using ::android::hardware::fastboot::V1_0::Result;
 using ::android::hardware::fastboot::V1_0::Status;

 constexpr char kFastbootProtocolVersion[] = "0.4";

 bool GetVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                 std::string* message) {
     *message = kFastbootProtocolVersion;
     return true;
 }

 bool GetBootloaderVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                           std::string* message) {
     *message = android::base::GetProperty("ro.bootloader", "");
     return true;
 }

 bool GetBasebandVersion(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                         std::string* message) {
     *message = android::base::GetProperty("ro.build.expect.baseband", "");
     return true;
 }

 bool GetProduct(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                 std::string* message) {
     *message = android::base::GetProperty("ro.product.device", "");
     return true;
 }

 bool GetSerial(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                std::string* message) {
     *message = android::base::GetProperty("ro.serialno", "");
     return true;
 }

 bool GetSecure(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                std::string* message) {
     *message = android::base::GetBoolProperty("ro.secure", "") ? "yes" : "no";
     return true;
 }

 bool GetVariant(FastbootDevice* device, const std::vector<std::string>& /* args */,
                 std::string* message) {
     auto fastboot_hal = device->fastboot_hal();
     if (!fastboot_hal) {
         *message = "Fastboot HAL not found";
         return false;
     }

     Result ret;
     auto ret_val = fastboot_hal->getVariant([&](std::string device_variant, Result result) {
         *message = device_variant;
         ret = result;
     });
     if (!ret_val.isOk() || ret.status != Status::SUCCESS) {
         *message = "Unable to get device variant";
         return false;
     }

     return true;
 }

 bool GetBatteryVoltageHelper(FastbootDevice* device, int32_t* battery_voltage) {
     using android::hardware::health::V2_0::HealthInfo;
     using android::hardware::health::V2_0::Result;

     auto health_hal = device->health_hal();
     if (!health_hal) {
         return false;
     }

     Result ret;
     auto ret_val = health_hal->getHealthInfo([&](Result result, HealthInfo info) {
         *battery_voltage = info.legacy.batteryVoltage;
         ret = result;
     });
     if (!ret_val.isOk() || (ret != Result::SUCCESS)) {
         return false;
     }

     return true;
 }

 bool GetBatterySoCOk(FastbootDevice* device, const std::vector<std::string>& /* args */,
                      std::string* message) {
     int32_t battery_voltage = 0;
     if (!GetBatteryVoltageHelper(device, &battery_voltage)) {
         *message = "Unable to read battery voltage";
         return false;
     }

     auto fastboot_hal = device->fastboot_hal();
     if (!fastboot_hal) {
         *message = "Fastboot HAL not found";
         return false;
     }

     Result ret;
     auto ret_val = fastboot_hal->getBatteryVoltageFlashingThreshold(
             [&](int32_t voltage_threshold, Result result) {
                 *message = battery_voltage >= voltage_threshold ? "yes" : "no";
                 ret = result;
             });

     if (!ret_val.isOk() || ret.status != Status::SUCCESS) {
         *message = "Unable to get battery voltage flashing threshold";
         return false;
     }

     return true;
 }

 bool GetOffModeChargeState(FastbootDevice* device, const std::vector<std::string>& /* args */,
                            std::string* message) {
     auto fastboot_hal = device->fastboot_hal();
     if (!fastboot_hal) {
         *message = "Fastboot HAL not found";
         return false;
     }

     Result ret;
     auto ret_val =
             fastboot_hal->getOffModeChargeState([&](bool off_mode_charging_state, Result result) {
                 *message = off_mode_charging_state ? "1" : "0";
                 ret = result;
             });
     if (!ret_val.isOk() || (ret.status != Status::SUCCESS)) {
         *message = "Unable to get off mode charge state";
         return false;
     }

     return true;
 }

 bool GetBatteryVoltage(FastbootDevice* device, const std::vector<std::string>& /* args */,
                        std::string* message) {
     int32_t battery_voltage = 0;
     if (GetBatteryVoltageHelper(device, &battery_voltage)) {
         *message = std::to_string(battery_voltage);
         return true;
     }
     *message = "Unable to get battery voltage";
     return false;
 }

 bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& /* args */,
                     std::string* message) {
     std::string suffix = device->GetCurrentSlot();
     *message = suffix.size() == 2 ? suffix.substr(1) : suffix;
     return true;
 }

 bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& /* args */,
                   std::string* message) {
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
         *message = "0";
     } else {
         *message = std::to_string(boot_control_hal->getNumberSlots());
     }
     return true;
 }

 bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args,
                        std::string* message) {
     if (args.empty()) {
         *message = "Missing argument";
         return false;
     }
     Slot slot;
     if (!GetSlotNumber(args[0], &slot)) {
         *message = "Invalid slot";
         return false;
     }
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
         *message = "Device has no slots";
         return false;
     }
     if (boot_control_hal->isSlotMarkedSuccessful(slot) != BoolResult::TRUE) {
         *message = "no";
     } else {
         *message = "yes";
     }
     return true;
 }

 bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args,
                        std::string* message) {
     if (args.empty()) {
         *message = "Missing argument";
         return false;
     }
     Slot slot;
     if (!GetSlotNumber(args[0], &slot)) {
         *message = "Invalid slot";
         return false;
     }
     auto boot_control_hal = device->boot_control_hal();
     if (!boot_control_hal) {
         *message = "Device has no slots";
         return false;
     }
     if (boot_control_hal->isSlotBootable(slot) != BoolResult::TRUE) {
         *message = "yes";
     } else {
         *message = "no";
     }
     return true;
 }

 bool GetMaxDownloadSize(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                         std::string* message) {
     *message = android::base::StringPrintf("0x%X", kMaxDownloadSizeDefault);
     return true;
 }

 bool GetUnlocked(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                  std::string* message) {
     *message = GetDeviceLockStatus() ? "no" : "yes";
     return true;
 }

 bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args,
                 std::string* message) {
     if (args.empty()) {
         *message = "Missing argument";
         return false;
     }
     std::string slot_suffix = device->GetCurrentSlot();
     if (slot_suffix.empty()) {
         *message = "no";
         return true;
     }
     std::string partition_name = args[0] + slot_suffix;
     if (FindPhysicalPartition(partition_name) ||
         LogicalPartitionExists(partition_name, slot_suffix)) {
         *message = "yes";
     } else {
         *message = "no";
     }
     return true;
 }

 bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args,
                       std::string* message) {
     if (args.size() < 1) {
         *message = "Missing argument";
         return false;
     }
     // Zero-length partitions cannot be created through device-mapper, so we
     // special case them here.
     bool is_zero_length;
     if (LogicalPartitionExists(args[0], device->GetCurrentSlot(), &is_zero_length) &&
         is_zero_length) {
         *message = "0x0";
         return true;
     }
     // Otherwise, open the partition as normal.
     PartitionHandle handle;
     if (!OpenPartition(device, args[0], &handle)) {
         *message = "Could not open partition";
         return false;
     }
     uint64_t size = get_block_device_size(handle.fd());
     *message = android::base::StringPrintf("0x%" PRIX64, size);
     return true;
 }

 bool GetPartitionType(FastbootDevice* device, const std::vector<std::string>& args,
                       std::string* message) {
     if (args.size() < 1) {
         *message = "Missing argument";
         return false;
     }

     std::string partition_name = args[0];
     if (!FindPhysicalPartition(partition_name) &&
         !LogicalPartitionExists(partition_name, device->GetCurrentSlot())) {
         *message = "Invalid partition";
         return false;
     }

     auto fastboot_hal = device->fastboot_hal();
     if (!fastboot_hal) {
         *message = "Fastboot HAL not found";
         return false;
     }

     FileSystemType type;
     Result ret;
     auto ret_val =
             fastboot_hal->getPartitionType(args[0], [&](FileSystemType fs_type, Result result) {
                 type = fs_type;
                 ret = result;
             });
     if (!ret_val.isOk() || (ret.status != Status::SUCCESS)) {
         *message = "Unable to retrieve partition type";
     } else {
         switch (type) {
             case FileSystemType::RAW:
                 *message = "raw";
                 return true;
             case FileSystemType::EXT4:
                 *message = "ext4";
                 return true;
             case FileSystemType::F2FS:
                 *message = "f2fs";
                 return true;
             default:
                 *message = "Unknown file system type";
         }
     }

     return false;
 }

 bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args,
                            std::string* message) {
     if (args.size() < 1) {
         *message = "Missing argument";
         return false;
     }
     // Note: if a partition name is in both the GPT and the super partition, we
     // return "true", to be consistent with prefering to flash logical partitions
     // over physical ones.
     std::string partition_name = args[0];
     if (LogicalPartitionExists(partition_name, device->GetCurrentSlot())) {
         *message = "yes";
         return true;
     }
     if (FindPhysicalPartition(partition_name)) {
         *message = "no";
         return true;
     }
     *message = "Partition not found";
     return false;
 }

 bool GetIsUserspace(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                     std::string* message) {
     *message = "yes";
     return true;
 }

 std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device) {
     std::vector<std::vector<std::string>> args;
     auto partitions = ListPartitions(device);
     for (const auto& partition : partitions) {
         args.emplace_back(std::initializer_list<std::string>{partition});
     }
     return args;
 }

 std::vector<std::vector<std::string>> GetAllPartitionArgsNoSlot(FastbootDevice* device) {
     auto partitions = ListPartitions(device);

     std::string slot_suffix = device->GetCurrentSlot();
     if (!slot_suffix.empty()) {
         auto names = std::move(partitions);
         for (const auto& name : names) {
             std::string slotless_name = name;
             if (android::base::EndsWith(name, "_a") || android::base::EndsWith(name, "_b")) {
                 slotless_name = name.substr(0, name.rfind("_"));
             }
             if (std::find(partitions.begin(), partitions.end(), slotless_name) ==
                 partitions.end()) {
                 partitions.emplace_back(slotless_name);
             }
         }
     }

     std::vector<std::vector<std::string>> args;
     for (const auto& partition : partitions) {
         args.emplace_back(std::initializer_list<std::string>{partition});
     }
     return args;
 }

 bool GetHardwareRevision(FastbootDevice* /* device */, const std::vector<std::string>& /* args */,
                          std::string* message) {
     *message = android::base::GetProperty("ro.revision", "");
     return true;
 }
	/*
	* Copyright (C) 2018 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 "variables.h"

	#include <inttypes.h>

	#include <android-base/file.h>
	#include <android-base/logging.h>
	#include <android-base/properties.h>
	#include <android-base/stringprintf.h>
	#include <android-base/strings.h>
	#include <ext4_utils/ext4_utils.h>
	#include <healthhalutils/HealthHalUtils.h>

	#include "fastboot_device.h"
	#include "flashing.h"
	#include "utility.h"

	using ::android::hardware::boot::V1_0::BoolResult;
	using ::android::hardware::boot::V1_0::Slot;
	using ::android::hardware::fastboot::V1_0::FileSystemType;
	using ::android::hardware::fastboot::V1_0::Result;
	using ::android::hardware::fastboot::V1_0::Status;

	constexpr char kFastbootProtocolVersion[] = "0.4";

	bool GetVersion(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = kFastbootProtocolVersion;
	return true;
	}

	bool GetBootloaderVersion(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetProperty("ro.bootloader", "");
	return true;
	}

	bool GetBasebandVersion(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetProperty("ro.build.expect.baseband", "");
	return true;
	}

	bool GetProduct(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetProperty("ro.product.device", "");
	return true;
	}

	bool GetSerial(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetProperty("ro.serialno", "");
	return true;
	}

	bool GetSecure(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetBoolProperty("ro.secure", "") ? "yes" : "no";
	return true;
	}

	bool GetVariant(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	auto fastboot_hal = device->fastboot_hal();
	if (!fastboot_hal) {
	*message = "Fastboot HAL not found";
	return false;
	}

	Result ret;
	auto ret_val = fastboot_hal->getVariant([&](std::string device_variant, Result result) {
	*message = device_variant;
	ret = result;
	});
	if (!ret_val.isOk() \|\| ret.status != Status::SUCCESS) {
	*message = "Unable to get device variant";
	return false;
	}

	return true;
	}

	bool GetBatteryVoltageHelper(FastbootDevice* device, int32_t* battery_voltage) {
	using android::hardware::health::V2_0::HealthInfo;
	using android::hardware::health::V2_0::Result;

	auto health_hal = device->health_hal();
	if (!health_hal) {
	return false;
	}

	Result ret;
	auto ret_val = health_hal->getHealthInfo([&](Result result, HealthInfo info) {
	*battery_voltage = info.legacy.batteryVoltage;
	ret = result;
	});
	if (!ret_val.isOk() \|\| (ret != Result::SUCCESS)) {
	return false;
	}

	return true;
	}

	bool GetBatterySoCOk(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	int32_t battery_voltage = 0;
	if (!GetBatteryVoltageHelper(device, &battery_voltage)) {
	*message = "Unable to read battery voltage";
	return false;
	}

	auto fastboot_hal = device->fastboot_hal();
	if (!fastboot_hal) {
	*message = "Fastboot HAL not found";
	return false;
	}

	Result ret;
	auto ret_val = fastboot_hal->getBatteryVoltageFlashingThreshold(
	[&](int32_t voltage_threshold, Result result) {
	*message = battery_voltage >= voltage_threshold ? "yes" : "no";
	ret = result;
	});

	if (!ret_val.isOk() \|\| ret.status != Status::SUCCESS) {
	*message = "Unable to get battery voltage flashing threshold";
	return false;
	}

	return true;
	}

	bool GetOffModeChargeState(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	auto fastboot_hal = device->fastboot_hal();
	if (!fastboot_hal) {
	*message = "Fastboot HAL not found";
	return false;
	}

	Result ret;
	auto ret_val =
	fastboot_hal->getOffModeChargeState([&](bool off_mode_charging_state, Result result) {
	*message = off_mode_charging_state ? "1" : "0";
	ret = result;
	});
	if (!ret_val.isOk() \|\| (ret.status != Status::SUCCESS)) {
	*message = "Unable to get off mode charge state";
	return false;
	}

	return true;
	}

	bool GetBatteryVoltage(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	int32_t battery_voltage = 0;
	if (GetBatteryVoltageHelper(device, &battery_voltage)) {
	*message = std::to_string(battery_voltage);
	return true;
	}
	*message = "Unable to get battery voltage";
	return false;
	}

	bool GetCurrentSlot(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	std::string suffix = device->GetCurrentSlot();
	*message = suffix.size() == 2 ? suffix.substr(1) : suffix;
	return true;
	}

	bool GetSlotCount(FastbootDevice* device, const std::vector<std::string>& /* args */,
	std::string* message) {
	auto boot_control_hal = device->boot_control_hal();
	if (!boot_control_hal) {
	*message = "0";
	} else {
	*message = std::to_string(boot_control_hal->getNumberSlots());
	}
	return true;
	}

	bool GetSlotSuccessful(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.empty()) {
	*message = "Missing argument";
	return false;
	}
	Slot slot;
	if (!GetSlotNumber(args[0], &slot)) {
	*message = "Invalid slot";
	return false;
	}
	auto boot_control_hal = device->boot_control_hal();
	if (!boot_control_hal) {
	*message = "Device has no slots";
	return false;
	}
	if (boot_control_hal->isSlotMarkedSuccessful(slot) != BoolResult::TRUE) {
	*message = "no";
	} else {
	*message = "yes";
	}
	return true;
	}

	bool GetSlotUnbootable(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.empty()) {
	*message = "Missing argument";
	return false;
	}
	Slot slot;
	if (!GetSlotNumber(args[0], &slot)) {
	*message = "Invalid slot";
	return false;
	}
	auto boot_control_hal = device->boot_control_hal();
	if (!boot_control_hal) {
	*message = "Device has no slots";
	return false;
	}
	if (boot_control_hal->isSlotBootable(slot) != BoolResult::TRUE) {
	*message = "yes";
	} else {
	*message = "no";
	}
	return true;
	}

	bool GetMaxDownloadSize(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::StringPrintf("0x%X", kMaxDownloadSizeDefault);
	return true;
	}

	bool GetUnlocked(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = GetDeviceLockStatus() ? "no" : "yes";
	return true;
	}

	bool GetHasSlot(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.empty()) {
	*message = "Missing argument";
	return false;
	}
	std::string slot_suffix = device->GetCurrentSlot();
	if (slot_suffix.empty()) {
	*message = "no";
	return true;
	}
	std::string partition_name = args[0] + slot_suffix;
	if (FindPhysicalPartition(partition_name) \|\|
	LogicalPartitionExists(partition_name, slot_suffix)) {
	*message = "yes";
	} else {
	*message = "no";
	}
	return true;
	}

	bool GetPartitionSize(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.size() < 1) {
	*message = "Missing argument";
	return false;
	}
	// Zero-length partitions cannot be created through device-mapper, so we
	// special case them here.
	bool is_zero_length;
	if (LogicalPartitionExists(args[0], device->GetCurrentSlot(), &is_zero_length) &&
	is_zero_length) {
	*message = "0x0";
	return true;
	}
	// Otherwise, open the partition as normal.
	PartitionHandle handle;
	if (!OpenPartition(device, args[0], &handle)) {
	*message = "Could not open partition";
	return false;
	}
	uint64_t size = get_block_device_size(handle.fd());
	*message = android::base::StringPrintf("0x%" PRIX64, size);
	return true;
	}

	bool GetPartitionType(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.size() < 1) {
	*message = "Missing argument";
	return false;
	}

	std::string partition_name = args[0];
	if (!FindPhysicalPartition(partition_name) &&
	!LogicalPartitionExists(partition_name, device->GetCurrentSlot())) {
	*message = "Invalid partition";
	return false;
	}

	auto fastboot_hal = device->fastboot_hal();
	if (!fastboot_hal) {
	*message = "Fastboot HAL not found";
	return false;
	}

	FileSystemType type;
	Result ret;
	auto ret_val =
	fastboot_hal->getPartitionType(args[0], [&](FileSystemType fs_type, Result result) {
	type = fs_type;
	ret = result;
	});
	if (!ret_val.isOk() \|\| (ret.status != Status::SUCCESS)) {
	*message = "Unable to retrieve partition type";
	} else {
	switch (type) {
	case FileSystemType::RAW:
	*message = "raw";
	return true;
	case FileSystemType::EXT4:
	*message = "ext4";
	return true;
	case FileSystemType::F2FS:
	*message = "f2fs";
	return true;
	default:
	*message = "Unknown file system type";
	}
	}

	return false;
	}

	bool GetPartitionIsLogical(FastbootDevice* device, const std::vector<std::string>& args,
	std::string* message) {
	if (args.size() < 1) {
	*message = "Missing argument";
	return false;
	}
	// Note: if a partition name is in both the GPT and the super partition, we
	// return "true", to be consistent with prefering to flash logical partitions
	// over physical ones.
	std::string partition_name = args[0];
	if (LogicalPartitionExists(partition_name, device->GetCurrentSlot())) {
	*message = "yes";
	return true;
	}
	if (FindPhysicalPartition(partition_name)) {
	*message = "no";
	return true;
	}
	*message = "Partition not found";
	return false;
	}

	bool GetIsUserspace(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = "yes";
	return true;
	}

	std::vector<std::vector<std::string>> GetAllPartitionArgsWithSlot(FastbootDevice* device) {
	std::vector<std::vector<std::string>> args;
	auto partitions = ListPartitions(device);
	for (const auto& partition : partitions) {
	args.emplace_back(std::initializer_list<std::string>{partition});
	}
	return args;
	}

	std::vector<std::vector<std::string>> GetAllPartitionArgsNoSlot(FastbootDevice* device) {
	auto partitions = ListPartitions(device);

	std::string slot_suffix = device->GetCurrentSlot();
	if (!slot_suffix.empty()) {
	auto names = std::move(partitions);
	for (const auto& name : names) {
	std::string slotless_name = name;
	if (android::base::EndsWith(name, "_a") \|\| android::base::EndsWith(name, "_b")) {
	slotless_name = name.substr(0, name.rfind("_"));
	}
	if (std::find(partitions.begin(), partitions.end(), slotless_name) ==
	partitions.end()) {
	partitions.emplace_back(slotless_name);
	}
	}
	}

	std::vector<std::vector<std::string>> args;
	for (const auto& partition : partitions) {
	args.emplace_back(std::initializer_list<std::string>{partition});
	}
	return args;
	}

	bool GetHardwareRevision(FastbootDevice* /* device /, const std::vector<std::string>& / args */,
	std::string* message) {
	*message = android::base::GetProperty("ro.revision", "");
	return true;
	}