Function try_loading_plugin

src/traffic_server/traffic_server.cc:1036–1075

Attempt to load a plugin shared object file. * * Note that this function is only used to load plugins for the purpose of * verifying that they are valid plugins. It is not used to load plugins for * normal operation. Any loaded plugin will be closed immediately after loading * it. * * @param[in] plugin_type The type of plugin for which to create a PluginInfo. * @param[in] plugin_path The p

 * @return True if the plugin loaded successfully, false otherwise.
 */
bool
try_loading_plugin(plugin_type_t plugin_type, const fs::path &plugin_path, std::string &error)
{
  // At least one plugin checks this during plugin unload, so act like the event system is shutdown
  TSSystemState::shut_down_event_system();

  switch (plugin_type) {
  case plugin_type_t::GLOBAL: {
    void      *handle        = nullptr;
    void      *initptr       = nullptr;
    bool const plugin_loaded = plugin_dso_load(plugin_path.c_str(), handle, initptr, error);
    if (handle != nullptr) {
      dlclose(handle);
      handle = nullptr;
    }
    return plugin_loaded;
  }
  case plugin_type_t::REMAP: {
    auto temporary_directory  = fs::temp_directory_path();
    temporary_directory      /= fs::path(std::string("verify_plugin_") + std::to_string(getpid()));
    std::error_code ec;
    if (!fs::create_directories(temporary_directory, ec)) {
      std::ostringstream error_os;
      error_os << "Could not create temporary directory " << temporary_directory.string() << ": " << ec.message();
      error = error_os.str();
      return false;
    }
    const auto     runtime_path = temporary_directory / plugin_path.filename();
    const fs::path unused_config;
    auto           plugin_info = std::make_unique<RemapPluginInfo>(unused_config, plugin_path, runtime_path);
    bool           loaded      = plugin_info->load(error, unused_config); // ToDo: Will this ever need support for cripts
    if (!fs::remove(temporary_directory, ec)) {
      fprintf(stderr, "ERROR: could not remove temporary directory '%s': %s\n", temporary_directory.c_str(), ec.message().c_str());
    }
    return loaded;
  }
  }
  // Unreached.
  return false;
}

/** A helper for the verify plugin command functions.
 *