Subj : Remote - Local Time synchro
To   : Jasen Betts
From : Gerald Miller
Date : Fri Jul 19 2002 06:30 pm

Hello Jasen,

    On Friday July 19 2002 at 07:43,
    Jasen Betts [3:640/531.42] wrote to Gerald Miller,
    about:  Remote - Local Time synchro

 GM>>                  Remote Time is: [61205] 17:00:05
 GM>>                   LOCAL Time is: [61230] 17:00:30
 GM>>    The Remote site is SLOWER by:         00:00:25
 GM>>  Action is:  - (subtraction) of:         00:00:25 from current
 GM>> LOCAL time... Do you wish to make an adjustment?

 GM>> Now, I have to decide how the adjustments are to be made
 GM>> and if I should let an "X" number of seconds #_slide_by_#
 GM>> before any notification of adjustments.....  ???
 GM>> Suggestions ???

 JB> I'd just put a message in the log file and change the system
 JB> time (unless the mailer event was less than the time taken)

I #think# that is the method that FrontDoor uses to synch systems
and it's unavailable to me....  When the event is running (making
the connection, the "handshake", the file exchanges...) the log
file is locked (in use) by 'Frodo'.....  :))

 JB> Still a delay of 5 seconds isn't going to be a big problem
 JB> either. you may want to ignore differences of greater than a
 JB> certain amount (if the remote end sets their clock
 JB> wrong....)

If I am within fifteen seconds (either way) of my Host, then the
time is acceptable.

 JB> if you want you could use inkey to delay and if the use
 JB> doesn't say no include the inkey delay could be the
 JB> synchronisation delay.

This sounds appealing...  Would you provide an example?

 JB> most times you'll probably only have to adjust by a few
 JB> seconds (if you only get 1 second difference probably you
 JB> should ignore it because it could really be less than one
 JB> second)

It's a math problem......

Take the CASE of "Y":

inkey /k"ynq[Enter]" /w60    Do you wish to make an adjustment?  %%reply
  switch %reply

      ......

  case y
      unset /q reply %+ (
      iff "%act"==" + (addition)" then %+
        set today=%@eval[%@date[%_date]*86400 + %@time[%_time]]
        set now=%@eval[%today + %@time[%amount]]
        set newtime=%@maketime[%@eval[%now %% 86400]]
          time %newtime
        echo              Revised time is:  %_time
      else
        set today=%@eval[%@date[%_date]*86400 + %@time[%_time]]
        set now=%@eval[%today - %@time[%amount]]
        set newtime=%@maketime[%@eval[%now %% 86400]]
          time %newtime
        echo              Revised time is:  %_time
      endiff
      )

This doesn't work, yet I can't see where my error is....

           Cheers ... Gerald

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