On Mon, 4 Oct 2004, Alex Kiernan wrote:
> The box got rebooted, ntpd started, exim started, ntpd delta'd the
> time backwards -178.829209s, exim had already started receiving
> messages, the world got confused.
I believe that the patch below should fix this problem.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book: http://www.uit.co.uk/exim-book
*** exim-4.42/src/exim.c Thu Aug 26 15:09:59 2004
--- exim.c Mon Oct 4 11:38:32 2004
***************
*** 309,314 ****
--- 309,326 ----
itval.it_interval.tv_usec = 0;
itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
+
+ /* We know that, overall, "now" is less than or equal to "then". Therefore, a
+ negative value for the microseconds is possible only in the case when "now"
+ is more than a second less than "then". That means that itval.it_value.tv_sec
+ is greater than zero. The following correction is therefore safe. */
+
+ if (itval.it_value.tv_usec < 0)
+ {
+ itval.it_value.tv_usec += 1000000;
+ itval.it_value.tv_sec -= 1;
+ }
+
DEBUG(D_transport|D_receive)
{
if (!running_in_test_harness)
