[PC-BSD Testing] ntpd and drift file

Fabrizio Parrella fabrizio at bibivu.com
Wed Apr 8 13:58:03 PDT 2009


I have been having problems with update the time since 1.5 (can't recall 1.4), and today I think I figure out the issue.  the drift file is missing or bad configured
in 1.5.1 and 7.0.2:
# ps awwx | grep ntp
1025  ??  Ss     0:04.39 /usr/sbin/ntpd -g -c /etc/ntp.conf -p /var/run/ntpd.pid -f /var/db/ntpd.drift
# ls -l /var/db/ntpd.drift
ls: /var/db/ntpd.drift: No such file or directory
# ls -l /var/db/ntp.drift
-rw-r--r--  1 root  wheel  7 Apr  8 14:59 /var/db/ntp.drift

looks like that the correct value is in ntp.drift, but the program is called with ntpd.drift.

The /etc/ntp.conf is correctly trying to override that value, but maybe the command line value is "stronger" than the config file...
The ntpd.conf is specified in the /etc/defaults/rc.conf
If I override that value in /etc/rc.conf everything works ok and ntpd starts without giving an error in the /var/log/messages

so, the solution is simple enough:
#echo ntpd_flags=\"-p /var/run/ntpd.pid -f /var/db/ntp.drift\" >> /etc/rc.conf
or (let's the /etc/ntp.conf decide which is the file):
#echo ntpd_flags=\"-p /var/run/ntpd.pid\" >> /etc/rc.conf
or (but I like better the second one)
#ln -s /var/db/ntp.drift /var/db/ntpd.drift
followed by a computer restart or:
#/etc/rc.d/ntpd restart
and this will generate a nice message (got an error message in 1.5, in 7 it doesn't work but no error messages):
# tail -2 /var/log/messages
Apr  8 16:49:08 h2113 ntpd[1025]: ntpd exiting on signal 15
Apr  8 16:49:08 h2113 ntpd[42455]: ntpd 4.2.4p5-a Mon Nov 24 19:44:30 EST 2008 (1)
#

Fabry
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