timed man page on NeXTSTEP

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TIMED(8)							      TIMED(8)

NAME
       timed - time server daemon

SYNOPSIS
       /usr/etc/timed [ -t ] [ -M ] [ -n network ] [ -i network ]

DESCRIPTION
       Note: timed is obsolete; ntpd(8) is recommended.

       Timed  is  the  time server daemon and is normally invoked at boot time
       from the rc(8) file.  It synchronizes the host's time with the time  of
       other  machines	in  a local area network running timed(8).  These time
       servers will slow down the clocks of some machines  and	speed  up  the
       clocks  of  others  to  bring  them  to	the average network time.  The
       average network time is computed from measurements of clock differences
       using the ICMP timestamp request message.

       The service provided by timed is based  on a master-slave scheme.  When
       timed(8) is started on a machine, it asks the master  for  the  network
       time  and  sets	the host's clock to that time.	After that, it accepts
       synchronization messages periodically sent  by  the  master  and	 calls
       adjtime(2) to perform the needed corrections on the host's clock.

       It  also	 communicates  with date(1) in order to set the date globally,
       and with timedc(8), a timed control program.  If	 the  machine  running
       the  master crashes, then the slaves will elect a new master from among
       slaves running with the -M flag.	 A timed running without the  -M  flag
       will  remain  a slave.  The -t flag enables timed to trace the messages
       it receives in the file /usr/adm/timed.log.  Tracing can be  turned  on
       or  off	by  the program timedc(8).  Timed normally checks for a master
       time server on each  network  to	 which	it  is	connected,  except  as
       modified	  by   the   options   described   below.    It	 will  request
       synchronization service from  the  first	 master	 server	 located.   If
       permitted  by  the  -M flag, it will provide synchronization service on
       any attached networks on which no current master server	was  detected.
       Such  a	server	propagates  the time computed by the top-level master.
       The -n flag, followed by the name  of  a	 network  which	 the  host  is
       connected  to  (see  networks(5)),  overrides the default choice of the
       network addresses made by the program.  Each time the -n flag  appears,
       that  network  name  is	added  to a list of valid networks.  All other
       networks are ignored.  The -i flag, followed by the name of  a  network
       to which the host is connected (see networks(5)), overrides the default
       choice of the network addresses made by the program.  Each time the  -i
       flag  appears,  that  network  name  is	added to a list of networks to
       ignore.	All other networks are used by the time daemon.	 The -n and -i
       flags are meaningless if used together.

FILES
       /usr/adm/timed.log	    tracing file for timed
       /usr/adm/timed.masterlog	    log file for master timed

SEE ALSO
       ntpd(8), date(1), adjtime(2), gettimeofday(2), icmp(4P), timedc(8),
       TSP:  The Time Synchronization Protocol for UNIX 4.3BSD, R. Gusella and
       S. Zatti

4.3 Berkeley Distribution	 May 28, 1986			      TIMED(8)
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