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Re: [gpsd-dev] Updated docs on NTP segment management
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] Updated docs on NTP segment management |
Date: |
Tue, 17 Feb 2015 13:16:19 -0800 |
Yo Hal!
On Tue, 17 Feb 2015 12:47:37 -0800
Hal Murray <address@hidden> wrote:
>
> > Yes, but I have been pushing Harlan and Pearly to all ntpshm
> > segments can be group ntpd and perms 660. We should coordinate
> > this with them. This swamp could be mostly drained if we do it
> > together.
>
> Please don't spend a lot of time trying to drain the old swamp.
I don't think it will take much time if we just convert to perms
660. ntpshm is pretty close to being pretty damn good.
> We can replace it with a new scheme that is read only to clients.
Yes, there are cool new things to do, but ntpshm is very lightweight,
thus embedded friendly. Plus, I assume, a large legacy usage.
> Does that solve the protection issues?
An interesting idea. You are suggesting perms 640 or 644? If
ntpd runs as ntpd:ntpd and creates the ntpshm as 640, then how
does gpsd which runs as gpsd:ntpd write to it?
I would hate to enforce that ntpd never create the ntpshm, or that
ntpd and gpsd run as the same user.
> Is there any reason to make gpsd's SHM not world readable?
Not that I can think of, but worth asking around. Seems to me
local time is not exactly a secret.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
address@hidden Tel:+1(541)382-8588
- [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Gary E. Miller, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Gary E. Miller, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Gary E. Miller, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Hal Murray, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management,
Gary E. Miller <=
- Re: [gpsd-dev] Updated docs on NTP segment management, Hal Murray, 2015/02/17
- Re: [gpsd-dev] Updated docs on NTP segment management, Harlan Stenn, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Hal Murray, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Gary E. Miller, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Gary E. Miller, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Harlan Stenn, 2015/02/18
- Re: [gpsd-dev] Updated docs on NTP segment management, Eric S. Raymond, 2015/02/18