| /* |
| * Copyright (C) 2022 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 <aidl/android/hardware/contexthub/BnContextHubCallback.h> |
| #include <aidl/android/hardware/contexthub/IContextHub.h> |
| #include <aidl/android/hardware/contexthub/NanoappBinary.h> |
| #include <android/binder_manager.h> |
| #include <android/binder_process.h> |
| #include <dirent.h> |
| #include <utils/String16.h> |
| |
| #include <cctype> |
| #include <filesystem> |
| #include <fstream> |
| #include <future> |
| #include <map> |
| #include <regex> |
| #include <stdexcept> |
| #include <string> |
| #include <vector> |
| |
| #include "chre_api/chre/version.h" |
| #include "chre_host/file_stream.h" |
| #include "chre_host/napp_header.h" |
| |
| using aidl::android::hardware::contexthub::AsyncEventType; |
| using aidl::android::hardware::contexthub::BnContextHubCallback; |
| using aidl::android::hardware::contexthub::ContextHubInfo; |
| using aidl::android::hardware::contexthub::ContextHubMessage; |
| using aidl::android::hardware::contexthub::HostEndpointInfo; |
| using aidl::android::hardware::contexthub::IContextHub; |
| using aidl::android::hardware::contexthub::NanoappBinary; |
| using aidl::android::hardware::contexthub::NanoappInfo; |
| using aidl::android::hardware::contexthub::NanSessionRequest; |
| using aidl::android::hardware::contexthub::Setting; |
| using android::chre::NanoAppBinaryHeader; |
| using android::chre::readFileContents; |
| using android::internal::ToString; |
| using ndk::ScopedAStatus; |
| |
| namespace { |
| // A default id 0 is used for every command requiring a context hub id. When |
| // this is not the case the id number should be one of the arguments of the |
| // commands. |
| constexpr uint32_t kContextHubId = 0; |
| constexpr int32_t kLoadTransactionId = 1; |
| constexpr int32_t kUnloadTransactionId = 2; |
| constexpr auto kTimeOutThresholdInSec = std::chrono::seconds(5); |
| // Locations should be searched in the sequence defined below: |
| const char *kPredefinedNanoappPaths[] = { |
| "/vendor/etc/chre/", |
| "/vendor/dsp/adsp/", |
| "/vendor/dsp/sdsp/", |
| "/vendor/lib/rfsa/adsp/", |
| }; |
| // Please keep kUsage in alphabetical order |
| constexpr char kUsage[] = R"( |
| Usage: chre_aidl_hal_client COMMAND [ARGS] |
| COMMAND ARGS...: |
| connect - connect to HAL, register the callback and keep |
| the session alive while user can execute other |
| commands. Use `exit` to quit the session. |
| connectEndpoint <HEX_HOST_ENDPOINT_ID> |
| - associate an endpoint with the current client |
| and notify HAL. |
| disableSetting <SETTING> - disable a setting identified by a number defined |
| in android/hardware/contexthub/Setting.aidl. |
| disableTestMode - disable test mode. |
| disconnectEndpoint <HEX_HOST_ENDPOINT_ID> |
| - remove an endpoint with the current client and |
| notify HAL. |
| enableSetting <SETTING> - enable a setting identified by a number defined |
| in android/hardware/contexthub/Setting.aidl. |
| enableTestMode - enable test mode. |
| getContextHubs - get all the context hubs. |
| list <PATH_OF_NANOAPPS> - list all the nanoapps' header info in the path. |
| load <APP_NAME> - load the nanoapp specified by the name. |
| If an absolute path like /path/to/awesome.so, |
| which is optional, is not provided then default |
| locations are searched. |
| query - show all loaded nanoapps (system apps excluded) |
| sendMessage <HEX_HOST_ENDPOINT_ID> <HEX_NANOAPP_ID | APP_NAME> <HEX_PAYLOAD> |
| - send a payload to a nanoapp. |
| unload <HEX_NANOAPP_ID | APP_NAME> |
| - unload the nanoapp specified by either the |
| nanoapp id in hex format or the app name. |
| If an absolute path like /path/to/awesome.so, |
| which is optional, is not provided then default |
| locations are searched. |
| )"; |
| |
| inline void throwError(const std::string &message) { |
| throw std::system_error{std::error_code(), message}; |
| } |
| |
| bool isValidHexNumber(const std::string &number) { |
| if (number.empty() || |
| (number.substr(0, 2) != "0x" && number.substr(0, 2) != "0X")) { |
| return false; |
| } |
| for (int i = 2; i < number.size(); i++) { |
| if (!isxdigit(number[i])) { |
| throwError("Hex app id " + number + " contains invalid character."); |
| } |
| } |
| return number.size() > 2; |
| } |
| |
| uint16_t verifyAndConvertEndpointHexId(const std::string &number) { |
| // host endpoint id must be a 16-bits long hex number. |
| if (isValidHexNumber(number)) { |
| int convertedNumber = std::stoi(number, /* idx= */ nullptr, /* base= */ 16); |
| if (convertedNumber < std::numeric_limits<uint16_t>::max()) { |
| return static_cast<uint16_t>(convertedNumber); |
| } |
| } |
| throwError("host endpoint id must be a 16-bits long hex number."); |
| return 0; // code never reached. |
| } |
| |
| bool isValidNanoappHexId(const std::string &number) { |
| if (!isValidHexNumber(number)) { |
| return false; |
| } |
| // Once the input has the hex prefix, an exception will be thrown if it is |
| // malformed because it shouldn't be treated as an app name anymore. |
| if (number.size() > 18) { |
| throwError("Hex app id must has a length of [3, 18] including the prefix."); |
| } |
| return true; |
| } |
| |
| std::string parseAppVersion(uint32_t version) { |
| std::ostringstream stringStream; |
| stringStream << std::hex << "0x" << version << std::dec << " (v" |
| << CHRE_EXTRACT_MAJOR_VERSION(version) << "." |
| << CHRE_EXTRACT_MINOR_VERSION(version) << "." |
| << CHRE_EXTRACT_PATCH_VERSION(version) << ")"; |
| return stringStream.str(); |
| } |
| |
| std::string parseTransactionId(int32_t transactionId) { |
| switch (transactionId) { |
| case kLoadTransactionId: |
| return "Loading"; |
| case kUnloadTransactionId: |
| return "Unloading"; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| class ContextHubCallback : public BnContextHubCallback { |
| public: |
| ScopedAStatus handleNanoappInfo( |
| const std::vector<NanoappInfo> &appInfo) override { |
| std::cout << appInfo.size() << " nanoapps loaded" << std::endl; |
| for (const NanoappInfo &app : appInfo) { |
| std::cout << "appId: 0x" << std::hex << app.nanoappId << std::dec << " {" |
| << "\n\tappVersion: " << parseAppVersion(app.nanoappVersion) |
| << "\n\tenabled: " << (app.enabled ? "true" : "false") |
| << "\n\tpermissions: " << ToString(app.permissions) |
| << "\n\trpcServices: " << ToString(app.rpcServices) << "\n}" |
| << std::endl; |
| } |
| setPromiseAndRefresh(); |
| return ScopedAStatus::ok(); |
| } |
| |
| ScopedAStatus handleContextHubMessage( |
| const ContextHubMessage &message, |
| const std::vector<std::string> & /*msgContentPerms*/) override { |
| std::cout << "Received a message with type " << message.messageType |
| << " size " << message.messageBody.size() << " from nanoapp 0x" |
| << std::hex << message.nanoappId |
| << " sent to the host endpoint 0x" << message.hostEndPoint |
| << std::endl; |
| std::cout << "message: 0x"; |
| for (const uint8_t &data : message.messageBody) { |
| std::cout << std::hex << static_cast<uint32_t>(data); |
| } |
| std::cout << std::endl; |
| setPromiseAndRefresh(); |
| return ScopedAStatus::ok(); |
| } |
| |
| ScopedAStatus handleContextHubAsyncEvent(AsyncEventType /*event*/) override { |
| setPromiseAndRefresh(); |
| return ScopedAStatus::ok(); |
| } |
| |
| // Called after loading/unloading a nanoapp. |
| ScopedAStatus handleTransactionResult(int32_t transactionId, |
| bool success) override { |
| std::cout << parseTransactionId(transactionId) << " transaction is " |
| << (success ? "successful" : "failed") << std::endl; |
| setPromiseAndRefresh(); |
| return ScopedAStatus::ok(); |
| } |
| |
| ScopedAStatus handleNanSessionRequest( |
| const NanSessionRequest & /* request */) override { |
| return ScopedAStatus::ok(); |
| } |
| |
| std::promise<void> promise; |
| |
| private: |
| void setPromiseAndRefresh() { |
| promise.set_value(); |
| promise = std::promise<void>{}; |
| } |
| }; |
| |
| std::shared_ptr<IContextHub> gContextHub = nullptr; |
| std::shared_ptr<ContextHubCallback> gCallback = nullptr; |
| |
| /** Initializes gContextHub and register gCallback. */ |
| std::shared_ptr<IContextHub> getContextHub() { |
| if (gContextHub == nullptr) { |
| auto aidlServiceName = std::string() + IContextHub::descriptor + "/default"; |
| ndk::SpAIBinder binder( |
| AServiceManager_waitForService(aidlServiceName.c_str())); |
| if (binder.get() == nullptr) { |
| throwError("Could not find Context Hub HAL"); |
| } |
| gContextHub = IContextHub::fromBinder(binder); |
| gCallback = ContextHubCallback::make<ContextHubCallback>(); |
| |
| if (!gContextHub->registerCallback(kContextHubId, gCallback).isOk()) { |
| throwError("Failed to register the callback"); |
| } |
| } |
| return gContextHub; |
| } |
| |
| void printNanoappHeader(const NanoAppBinaryHeader &header) { |
| std::cout << " {" |
| << "\n\tappId: 0x" << std::hex << header.appId << std::dec |
| << "\n\tappVersion: " << parseAppVersion(header.appVersion) |
| << "\n\tflags: " << header.flags << "\n\ttarget CHRE API version: " |
| << static_cast<int>(header.targetChreApiMajorVersion) << "." |
| << static_cast<int>(header.targetChreApiMinorVersion) << "\n}" |
| << std::endl; |
| } |
| |
| std::unique_ptr<NanoAppBinaryHeader> findHeaderByName( |
| const std::string &appName, const std::string &binaryPath) { |
| DIR *dir = opendir(binaryPath.c_str()); |
| if (dir == nullptr) { |
| return nullptr; |
| } |
| std::regex regex(appName + ".napp_header"); |
| std::cmatch match; |
| |
| std::unique_ptr<NanoAppBinaryHeader> result = nullptr; |
| for (struct dirent *entry; (entry = readdir(dir)) != nullptr;) { |
| if (!std::regex_match(entry->d_name, match, regex)) { |
| continue; |
| } |
| std::ifstream input(std::string(binaryPath) + "/" + entry->d_name, |
| std::ios::binary); |
| result = std::make_unique<NanoAppBinaryHeader>(); |
| input.read(reinterpret_cast<char *>(result.get()), |
| sizeof(NanoAppBinaryHeader)); |
| break; |
| } |
| closedir(dir); |
| return result; |
| } |
| |
| void readNanoappHeaders(std::map<std::string, NanoAppBinaryHeader> &nanoapps, |
| const std::string &binaryPath) { |
| DIR *dir = opendir(binaryPath.c_str()); |
| if (dir == nullptr) { |
| return; |
| } |
| std::regex regex("(\\w+)\\.napp_header"); |
| std::cmatch match; |
| for (struct dirent *entry; (entry = readdir(dir)) != nullptr;) { |
| if (!std::regex_match(entry->d_name, match, regex)) { |
| continue; |
| } |
| std::ifstream input(std::string(binaryPath) + "/" + entry->d_name, |
| std::ios::binary); |
| input.read(reinterpret_cast<char *>(&nanoapps[match[1]]), |
| sizeof(NanoAppBinaryHeader)); |
| } |
| closedir(dir); |
| } |
| |
| void verifyStatus(const std::string &operation, const ScopedAStatus &status) { |
| if (!status.isOk()) { |
| throwError(operation + " fails with abnormal status " + |
| ToString(status.getMessage()) + " error code " + |
| ToString(status.getServiceSpecificError())); |
| } |
| } |
| |
| void verifyStatusAndSignal(const std::string &operation, |
| const ScopedAStatus &status, |
| const std::future<void> &future_signal) { |
| verifyStatus(operation, status); |
| std::future_status future_status = |
| future_signal.wait_for(kTimeOutThresholdInSec); |
| if (future_status != std::future_status::ready) { |
| throwError(operation + " doesn't finish within " + |
| ToString(kTimeOutThresholdInSec.count()) + " seconds"); |
| } |
| } |
| |
| /** Finds the .napp_header file associated to the nanoapp. |
| * |
| * This function guarantees to return a non-null {@link NanoAppBinaryHeader} |
| * pointer. In case a .napp_header file cannot be found an exception will be |
| * raised. |
| * |
| * @param pathAndName name of the nanoapp that might be prefixed with it path. |
| * It will be normalized to the format of <absolute-path><name>.so at the end. |
| * For example, "abc" will be changed to "/path/to/abc.so". |
| * @return a unique pointer to the {@link NanoAppBinaryHeader} found |
| */ |
| std::unique_ptr<NanoAppBinaryHeader> findHeaderAndNormalizePath( |
| std::string &pathAndName) { |
| // To match the file pattern of [path]<name>[.so] |
| std::regex pathNameRegex("(.*?)(\\w+)(\\.so)?"); |
| std::smatch smatch; |
| if (!std::regex_match(pathAndName, smatch, pathNameRegex)) { |
| throwError("Invalid nanoapp: " + pathAndName); |
| } |
| std::string fullPath = smatch[1]; |
| std::string appName = smatch[2]; |
| // absolute path is provided: |
| if (!fullPath.empty() && fullPath[0] == '/') { |
| auto result = findHeaderByName(appName, fullPath); |
| if (result == nullptr) { |
| throwError("Unable to find the nanoapp header for " + pathAndName); |
| } |
| pathAndName = fullPath + appName + ".so"; |
| return result; |
| } |
| // relative path is searched form predefined locations: |
| for (const std::string &predefinedPath : kPredefinedNanoappPaths) { |
| auto result = findHeaderByName(appName, predefinedPath); |
| if (result == nullptr) { |
| continue; |
| } |
| pathAndName = predefinedPath + appName + ".so"; |
| std::cout << "Found the nanoapp header for " << pathAndName << std::endl; |
| return result; |
| } |
| throwError("Unable to find the nanoapp header for " + pathAndName); |
| return nullptr; |
| } |
| |
| int64_t getNanoappIdFrom(std::string &appIdOrName) { |
| int64_t appId; |
| if (isValidNanoappHexId(appIdOrName)) { |
| appId = std::stoll(appIdOrName, nullptr, 16); |
| } else { |
| // Treat the appIdOrName as the app name and try again |
| appId = |
| static_cast<int64_t>(findHeaderAndNormalizePath(appIdOrName)->appId); |
| } |
| return appId; |
| } |
| |
| void getAllContextHubs() { |
| std::vector<ContextHubInfo> hubs{}; |
| getContextHub()->getContextHubs(&hubs); |
| if (hubs.empty()) { |
| std::cerr << "Failed to get any context hub." << std::endl; |
| return; |
| } |
| for (const auto &hub : hubs) { |
| std::cout << "Context Hub " << hub.id << ": " << std::endl |
| << " Name: " << hub.name << std::endl |
| << " Vendor: " << hub.vendor << std::endl |
| << " Max support message length (bytes): " |
| << hub.maxSupportedMessageLengthBytes << std::endl |
| << " Version: " << static_cast<uint32_t>(hub.chreApiMajorVersion) |
| << "." << static_cast<uint32_t>(hub.chreApiMinorVersion) |
| << std::endl |
| << " Chre platform id: 0x" << std::hex << hub.chrePlatformId |
| << std::endl; |
| } |
| } |
| |
| void loadNanoapp(std::string &pathAndName) { |
| auto header = findHeaderAndNormalizePath(pathAndName); |
| std::vector<uint8_t> soBuffer{}; |
| if (!readFileContents(pathAndName.c_str(), soBuffer)) { |
| throwError("Failed to open the content of " + pathAndName); |
| } |
| NanoappBinary binary; |
| binary.nanoappId = static_cast<int64_t>(header->appId); |
| binary.customBinary = soBuffer; |
| binary.flags = static_cast<int32_t>(header->flags); |
| binary.targetChreApiMajorVersion = |
| static_cast<int8_t>(header->targetChreApiMajorVersion); |
| binary.targetChreApiMinorVersion = |
| static_cast<int8_t>(header->targetChreApiMinorVersion); |
| binary.nanoappVersion = static_cast<int32_t>(header->appVersion); |
| |
| auto status = |
| getContextHub()->loadNanoapp(kContextHubId, binary, kLoadTransactionId); |
| verifyStatusAndSignal(/* operation= */ "loading nanoapp " + pathAndName, |
| status, gCallback->promise.get_future()); |
| } |
| |
| void unloadNanoapp(std::string &appIdOrName) { |
| auto appId = getNanoappIdFrom(appIdOrName); |
| auto status = getContextHub()->unloadNanoapp(kContextHubId, appId, |
| kUnloadTransactionId); |
| verifyStatusAndSignal(/* operation= */ "unloading nanoapp " + appIdOrName, |
| status, gCallback->promise.get_future()); |
| } |
| |
| void queryNanoapps() { |
| auto status = getContextHub()->queryNanoapps(kContextHubId); |
| verifyStatusAndSignal(/* operation= */ "querying nanoapps", status, |
| gCallback->promise.get_future()); |
| } |
| |
| void onEndpointConnected(const std::string &hexEndpointId) { |
| auto contextHub = getContextHub(); |
| uint16_t hostEndpointId = verifyAndConvertEndpointHexId(hexEndpointId); |
| HostEndpointInfo info = { |
| .hostEndpointId = hostEndpointId, |
| .type = HostEndpointInfo::Type::NATIVE, |
| .packageName = "chre_aidl_hal_client", |
| .attributionTag{}, |
| }; |
| // connect the endpoint to HAL |
| verifyStatus(/* operation= */ "connect endpoint", |
| contextHub->onHostEndpointConnected(info)); |
| std::cout << "onHostEndpointConnected() is called. " << std::endl; |
| } |
| |
| void onEndpointDisconnected(const std::string &hexEndpointId) { |
| auto contextHub = getContextHub(); |
| uint16_t hostEndpointId = verifyAndConvertEndpointHexId(hexEndpointId); |
| // disconnect the endpoint from HAL |
| verifyStatus(/* operation= */ "disconnect endpoint", |
| contextHub->onHostEndpointDisconnected(hostEndpointId)); |
| std::cout << "onHostEndpointDisconnected() is called. " << std::endl; |
| } |
| |
| /** Sends a hexPayload from hexHostEndpointId to appIdOrName. */ |
| void sendMessageToNanoapp(const std::string &hexHostEndpointId, |
| std::string &appIdOrName, |
| const std::string &hexPayload) { |
| if (!isValidHexNumber(hexPayload)) { |
| throwError("Invalid hex payload."); |
| } |
| auto appId = getNanoappIdFrom(appIdOrName); |
| uint16_t hostEndpointId = verifyAndConvertEndpointHexId(hexHostEndpointId); |
| ContextHubMessage contextHubMessage = { |
| .nanoappId = appId, |
| .hostEndPoint = hostEndpointId, |
| .messageBody = {}, |
| .permissions = {}, |
| }; |
| // populate the payload |
| for (int i = 2; i < hexPayload.size(); i += 2) { |
| contextHubMessage.messageBody.push_back( |
| std::stoi(hexPayload.substr(i, 2), /* idx= */ nullptr, /* base= */ 16)); |
| } |
| // send the message |
| auto contextHub = getContextHub(); |
| onEndpointConnected(hexHostEndpointId); |
| auto status = contextHub->sendMessageToHub(kContextHubId, contextHubMessage); |
| verifyStatusAndSignal(/* operation= */ "sending a message to " + appIdOrName, |
| status, gCallback->promise.get_future()); |
| onEndpointDisconnected(hexHostEndpointId); |
| } |
| |
| void changeSetting(const std::string &setting, bool enabled) { |
| auto contextHub = getContextHub(); |
| int settingType = std::stoi(setting); |
| if (settingType < 1 || settingType > 7) { |
| throwError("setting type must be within [1, 7]."); |
| } |
| ScopedAStatus status = |
| contextHub->onSettingChanged(static_cast<Setting>(settingType), enabled); |
| std::cout << "onSettingChanged is called to " |
| << (enabled ? "enable" : "disable") << " setting type " |
| << settingType << std::endl; |
| verifyStatus("change setting", status); |
| } |
| |
| void enableTestModeOnContextHub() { |
| auto status = getContextHub()->setTestMode(true); |
| verifyStatusAndSignal(/* operation= */ "enabling test mode", status, |
| gCallback->promise.get_future()); |
| } |
| |
| void disableTestModeOnContextHub() { |
| auto status = getContextHub()->setTestMode(false); |
| verifyStatusAndSignal(/* operation= */ "disabling test mode", status, |
| gCallback->promise.get_future()); |
| } |
| |
| // Please keep Command in alphabetical order |
| enum Command { |
| connect, |
| connectEndpoint, |
| disableSetting, |
| disableTestMode, |
| disconnectEndpoint, |
| enableSetting, |
| enableTestMode, |
| getContextHubs, |
| list, |
| load, |
| query, |
| sendMessage, |
| unload, |
| unsupported |
| }; |
| |
| struct CommandInfo { |
| Command cmd; |
| u_int8_t numofArgs; // including cmd; |
| }; |
| |
| Command parseCommand(const std::vector<std::string> &cmdLine) { |
| std::map<std::string, CommandInfo> commandMap{ |
| {"connect", {connect, 1}}, |
| {"connectEndpoint", {connectEndpoint, 2}}, |
| {"disableSetting", {disableSetting, 2}}, |
| {"disableTestMode", {disableTestMode, 1}}, |
| {"disconnectEndpoint", {disconnectEndpoint, 2}}, |
| {"enableSetting", {enableSetting, 2}}, |
| {"enableTestMode", {enableTestMode, 1}}, |
| {"getContextHubs", {getContextHubs, 1}}, |
| {"list", {list, 2}}, |
| {"load", {load, 2}}, |
| {"query", {query, 1}}, |
| {"sendMessage", {sendMessage, 4}}, |
| {"unload", {unload, 2}}, |
| }; |
| if (cmdLine.empty() || commandMap.find(cmdLine[0]) == commandMap.end()) { |
| return unsupported; |
| } |
| auto cmdInfo = commandMap.at(cmdLine[0]); |
| return cmdLine.size() == cmdInfo.numofArgs ? cmdInfo.cmd : unsupported; |
| } |
| |
| void executeCommand(std::vector<std::string> cmdLine) { |
| switch (parseCommand(cmdLine)) { |
| case connectEndpoint: { |
| onEndpointConnected(cmdLine[1]); |
| break; |
| } |
| case disableSetting: { |
| changeSetting(cmdLine[1], false); |
| break; |
| } |
| case disableTestMode: { |
| disableTestModeOnContextHub(); |
| break; |
| } |
| case disconnectEndpoint: { |
| onEndpointDisconnected(cmdLine[1]); |
| break; |
| } |
| case enableSetting: { |
| changeSetting(cmdLine[1], true); |
| break; |
| } |
| case enableTestMode: { |
| enableTestModeOnContextHub(); |
| break; |
| } |
| case getContextHubs: { |
| getAllContextHubs(); |
| break; |
| } |
| case list: { |
| std::map<std::string, NanoAppBinaryHeader> nanoapps{}; |
| readNanoappHeaders(nanoapps, cmdLine[1]); |
| for (const auto &entity : nanoapps) { |
| std::cout << entity.first; |
| printNanoappHeader(entity.second); |
| } |
| break; |
| } |
| case load: { |
| loadNanoapp(cmdLine[1]); |
| break; |
| } |
| case query: { |
| queryNanoapps(); |
| break; |
| } |
| case sendMessage: { |
| sendMessageToNanoapp(cmdLine[1], cmdLine[2], cmdLine[3]); |
| break; |
| } |
| case unload: { |
| unloadNanoapp(cmdLine[1]); |
| break; |
| } |
| default: |
| std::cout << kUsage; |
| } |
| } |
| |
| std::vector<std::string> getCommandLine() { |
| std::string input; |
| std::cout << "> "; |
| std::getline(std::cin, input); |
| input.push_back('\n'); |
| std::vector<std::string> result{}; |
| for (int begin = 0, end = 0; end < input.size();) { |
| if (isspace(input[begin])) { |
| end = begin = begin + 1; |
| continue; |
| } |
| if (!isspace(input[end])) { |
| end += 1; |
| continue; |
| } |
| result.push_back(input.substr(begin, end - begin)); |
| begin = end; |
| } |
| return result; |
| } |
| |
| void connectToHal() { |
| auto hub = getContextHub(); |
| std::cout << "Connected to context hub." << std::endl; |
| while (true) { |
| auto cmdLine = getCommandLine(); |
| if (cmdLine.empty()) { |
| continue; |
| } |
| if (cmdLine.size() == 1 && cmdLine[0] == "connect") { |
| std::cout << "Already in a live session." << std::endl; |
| continue; |
| } |
| if (cmdLine.size() == 1 && cmdLine[0] == "exit") { |
| break; |
| } |
| try { |
| executeCommand(cmdLine); |
| } catch (std::system_error &e) { |
| std::cerr << e.what() << std::endl; |
| } |
| } |
| } |
| } // anonymous namespace |
| |
| int main(int argc, char *argv[]) { |
| // Start binder thread pool to enable callbacks. |
| ABinderProcess_startThreadPool(); |
| |
| std::vector<std::string> cmdLine{}; |
| for (int i = 1; i < argc; i++) { |
| cmdLine.emplace_back(argv[i]); |
| } |
| if (cmdLine.size() == 1 && cmdLine[0] == "connect") { |
| connectToHal(); |
| return 0; |
| } |
| try { |
| executeCommand(cmdLine); |
| } catch (std::system_error &e) { |
| std::cerr << e.what() << std::endl; |
| return -1; |
| } |
| return 0; |
| } |
