int acquire_data_fd(const void *data, size_t size, unsigned flags);
+#if 0 /// UNNEEDED by elogind
int fd_duplicate_data_fd(int fd);
+#endif // 0
/* Hint: ENETUNREACH happens if we try to connect to "non-existing" special IP addresses, such as ::5 */
#define ERRNO_IS_DISCONNECT(r) \