Method ueventOpen

src/Library/DeviceManagerBase.cpp:154–184

  }

  int DeviceManagerBase::ueventOpen()
  {
    int socket_fd = -1;
    USBGUARD_SYSCALL_THROW("UEvent device manager",
      (socket_fd = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT)) < 0);

    try {
      const int optval = 1;
      USBGUARD_SYSCALL_THROW("UEvent device manager",
        setsockopt(socket_fd, SOL_SOCKET, SO_PASSCRED, &optval, sizeof optval) != 0);
      /*
       * Set a 1MiB receive buffer on the netlink socket to avoid ENOBUFS error
       * in recvmsg.
       */
      const size_t rcvbuf_max = 1024 * 1024;
      USBGUARD_SYSCALL_THROW("UEvent device manager",
        setsockopt(socket_fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf_max, sizeof rcvbuf_max) != 0);
      struct sockaddr_nl sa = {};
      sa.nl_family = AF_NETLINK;
      sa.nl_pid = getpid();
      sa.nl_groups = -1;
      USBGUARD_SYSCALL_THROW("UEvent device manager",
        bind(socket_fd, reinterpret_cast<const sockaddr*>(&sa), sizeof sa) != 0);
    }
    catch (...) {
      (void)close(socket_fd);
      throw;
    }

    return socket_fd;
  }

  void DeviceManagerBase::setDeviceAuthorizedDefault(SysFSDevice* device, DeviceManager::AuthorizedDefaultType auth_default)
  {