term% cat index.txt TIMESYNC(8) System Manager's Manual TIMESYNC(8)
NAME
timesync - synchronize the system clock to a time source
SYNOPSIS
aux/timesync [ -a accuracy ] [ -S stratum ] [ -s netroot ] [ -frnDdLilG
] [ timeserver ]
DESCRIPTION
Aux/timesync synchronizes the system clock to a time source, by default
a file server. The options are:
-f synchronize to a file server. If timeserver is missing, use
/srv/boot.
-r synchronize to the local real time clock, #r/rtc.
-L used with -r to indicate the real time clock is in local time
rather than GMT. This is useful on PCs that also run the Win‐
dows OS.
-n synchronize to an NTP server. If timeserver is missing, dial
the server udp!$ntp!ntp.
-D print debugging to standard error
-d put file containing last determined clock frequency in directory
dir, default /tmp.
-i stands for impotent. Timesync announces what it would do but
doesn't do it. This is useful for tracking alternate time
sources.
-a specifies the accuracy in nanoseconds to which the clock should
be synchronized. This determines how often the reference clock
is accessed.
-G causes timesync to use a gps server (see gpsfs(8)) as a time
source.
-s causes timesync to listen for UDP NTP requests on the network
rooted at netroot. Up to 4 -s options are allowed.
-S sets the stratum number to stratum.
-l turns on logging to /sys/log/timesync.
FILES
/tmp/ts.<sysname>.<type>.timeserver
where the last frequency guess is kept
/sys/log/timesync
log file
SOURCE
/sys/src/cmd/aux/timesync.c
BUGS
Only works with IPv4.
TIMESYNC(8)