Re: 5.3-BETA7: /etc/rc.d/ntpdate not using "$ntpdate_flags" from rc.conf ?
From: Ruslan Ermilov (ru_at_freebsd.org)
Date: 10/07/04
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- In reply to: spam maps: "5.3-BETA7: /etc/rc.d/ntpdate not using "$ntpdate_flags" from rc.conf ?"
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Date: Thu, 7 Oct 2004 11:10:00 +0300 To: spam maps <spamrefuse@yahoo.com>
On Wed, Oct 06, 2004 at 07:18:19PM -0700, spam maps wrote:
>
> Hello,
>
> I'm puzzled by the /etc/rc.d/ntpdate script and
> I wonder whether the script is wrong, or there
> is lack of documentation here.
>
I'd say lack of reading the documentation. ;)
This is from the rc.subr(8) manpage:
: rc_flags Flags to start the default command with. Defaults
: to ${name}_flags, unless overridden by the environ-
: ment variable `flags'. This variable may be
: changed by the argument_precmd method.
> In /etc/rc.conf, I am using:
> ntpdate_enable="YES"
> ntpd_enable="YES"
> with servers listed in /etc/ntp.conf.
>
> But I wonder if ntpdate instantly adjusts time
> using the "-b" from default ntpdate_flags.
>
> The flags used by the /etc/rc.d/ntpdate script
> are found in this order:
>
> 1. If /etc/ntp.conf exists and has servers
> listed, then extract the servers from here.
>
... and no ntpdate_hosts was specified.
> 2. If above fails to find servers, then use
> servers listed in /etc/rc.conf as
> ntpdate_flags="...".
>
Um no. Everything specified as ntpdate_flags is *always*
passed to ntpdate(8). I use ntpdate_flags="-b <ntp_server>".
> 3. If all that fails, exit ntpdate without doing
> any time/date modifications.
>
Only if neither of ntpdate_hosts, /etc/ntp.conf, and
ntpdate_flags exist and set.
> I also wonder whether the default ntpdate_flags
> (set to "-b") has any effect at all, since it is
> ignored in case 1.
>
Yes it does, and it becomes a value of ${rc_flags}.
if [ -n "$ntpdate_hosts" -o -n "$rc_flags" ]; then
echo "Setting date via ntp."
${ntpdate_command:-ntpdate} $rc_flags $ntpdate_hosts
fi
Run it like this to see the actual command that gets executed:
sh -x /etc/rc.d/ntpdate start
Cheers,
-- Ruslan Ermilov ru@FreeBSD.org FreeBSD committer
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