      Hardware::PC() ? util::getenv_default("HOME", "/.comma/persist/comma/id_rsa", "/persist/comma/id_rsa")
                     : "/persist/comma/id_rsa";
  
  QByteArray rsa_sign(const QByteArray &data) {
    auto file = QFile(private_key_path.c_str());
    if (!file.open(QIODevice::ReadOnly)) {
      qDebug() << "No RSA private key found, please run manager.py or registration.py";
      return QByteArray();
    }
    auto key = file.readAll();
 
</s> remove const std::string private_key_path =
    Hardware::PC() ? util::getenv_default("HOME", "/.comma/persist/comma/id_rsa", "/persist/comma/id_rsa")
                   : "/persist/comma/id_rsa";

 </s> add  </s> remove const std::string default_params_path = Hardware::PC() ? util::getenv_default("HOME", "/.comma/params", "/data/params")
                                                       : "/data/params";
const std::string persistent_params_path = Hardware::PC() ? default_params_path : "/persist/comma/params";

 </s> add  </s> remove std::string getenv_default(const char* env_var, const char * suffix, const char* default_val) {
  const char* env_val = getenv(env_var);
  if (env_val != NULL) {
    return std::string(env_val) + std::string(suffix);
  } else {
    return std::string(default_val);
  }
 </s> add std::string getenv(const char* key, const char* default_val) {
  const char* val = ::getenv(key);
  return val ? val : default_val;
}

int getenv(const char* key, int default_val) {
  const char* val = ::getenv(key);
  return val ? atoi(val) : default_val;
}

float getenv(const char* key, float default_val) {
  const char* val = ::getenv(key);
  return val ? atof(val) : default_val; </s> remove const std::string DEFAULT_LOG_ROOT =
    Hardware::PC() ? util::getenv_default("HOME", "/.comma/media/0/realdata", "/data/media/0/realdata")
                   : "/data/media/0/realdata";

const std::string LOG_ROOT = util::getenv_default("LOG_ROOT", "", DEFAULT_LOG_ROOT.c_str());
 </s> add const std::string LOG_ROOT = Path::log_root(); </s> remove   static const int x_min = getenv("XMIN") ? atoi(getenv("XMIN")) : 0;
  static const int y_min = getenv("YMIN") ? atoi(getenv("YMIN")) : 0;
  static const int env_xmax = getenv("XMAX") ? atoi(getenv("XMAX")) : -1;
  static const int env_ymax = getenv("YMAX") ? atoi(getenv("YMAX")) : -1;
  static const int scale = getenv("SCALE") ? atoi(getenv("SCALE")) : 1;
 </s> add   static const int x_min = util::getenv("XMIN", 0);
  static const int y_min = util::getenv("YMIN", 0);
  static const int env_xmax = util::getenv("XMAX", -1);
  static const int env_ymax = util::getenv("YMAX", -1);
  static const int scale = util::getenv("SCALE", 1);
  auto file = QFile(Path::rsa_file().c_str());
      Hardware::PC() ? util::getenv_default("HOME", "/.comma/persist/comma/id_rsa", "/persist/comma/id_rsa")
                     : "/persist/comma/id_rsa";
  
  QByteArray rsa_sign(const QByteArray &data) {
  auto file = QFile(Path::rsa_file().c_str());
    if (!file.open(QIODevice::ReadOnly)) {
      qDebug() << "No RSA private key found, please run manager.py or registration.py";
      return QByteArray();
    }
    auto key = file.readAll();
keep keep keep keep replace keep keep keep keep keep
 hw.h: move Hardware-related paths to namespace Path (#21826)

* refactor getenv and path

* apply review 
selfdrive/ui/qt/api.cc