+# undef DISABLE_DNSSEC
+#endif
+
+/* Wrapper around read(2) to read all the data we requested (BLOCKING) */
+ssize_t
+readn(int fd, void *buffer, size_t len);
+
+/* Some platforms (FreeBSD, OpenBSD, Solaris) do not seem to define this */
+
+#ifndef POLLRDHUP
+# define POLLRDHUP (POLLIN | POLLHUP)