+
+ <para>If multiple socket units activate the same
+ service the order of the file descriptors passed to
+ its main process is undefined. If additional file
+ descriptors have been passed to the service manager
+ using
+ <citerefentry><refentrytitle>sd_pid_notify_with_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>'s
+ <literal>FDSTORE=1</literal> messages, these file
+ descriptors are passed last, in arbitrary order, and
+ with duplicates removed.</para>