+=head1 RETURN VALUES
+
+X509_NAME_oneline() returns a valid string on success or NULL on error.
+
+X509_NAME_print() returns 1 on success or 0 on error.
+
+X509_NAME_print_ex() and X509_NAME_print_ex_fp() return 1 on success or 0 on error
+if the B<XN_FLAG_COMPAT> is set, which is the same as X509_NAME_print(). Otherwise,
+it returns -1 on error or other values on success.
+