Method ueventEnumerateTriggerDevice

src/Library/UEventDeviceManager.cpp:412–452

  }

  int UEventDeviceManager::ueventEnumerateTriggerDevice(const std::string& devpath, const std::string& buspath)
  {
    USBGUARD_LOG(Trace) << "devpath=" << devpath << " buspath=" << buspath;

    try {
      std::string sysfs_absolute_path(PATH_MAX, 0);

      if (::realpath(devpath.c_str(), &sysfs_absolute_path[0]) == nullptr) {
        USBGUARD_LOG(Warning) << "Cannot resolve realpath for " << devpath;
        return 0;
      }

      sysfs_absolute_path.resize(::strlen(&sysfs_absolute_path[0]));

      if (!hasPrefix(sysfs_absolute_path, SysFSDevice::getSysfsRoot())) {
        USBGUARD_LOG(Warning) << "Device isn't rooted inside " << SysFSDevice::getSysfsRoot() << ". Skipping.";
        return 0;
      }

      const std::string sysfs_relative_path = removePrefix(SysFSDevice::getSysfsRoot(), sysfs_absolute_path);
      USBGUARD_LOG(Debug) << "sysfs_relative_path=" << sysfs_relative_path;
      SysFSDevice device(sysfs_relative_path);

      if (device.getUEvent().getAttribute("DEVTYPE") == "usb_device") {
        learnSysfsPath(sysfs_relative_path);
        ueventProcessAction("add", sysfs_relative_path);
        return 1;
      }
      else {
        USBGUARD_LOG(Debug) << "DEVTYPE != usb_device. Skipping.";
      }
    }
    catch (const Exception& ex) {
      USBGUARD_LOG(Warning) << "device enumeration exception: " << buspath << ": " << ex.message();
    }
    catch (const std::exception& ex) {
      USBGUARD_LOG(Warning) << "device enumeration exception: " << buspath << ": " << ex.what();
    }

    return 0;
  }

  void UEventDeviceManager::processBacklog()
  {