Yo Miroslav!
On Thu, 26 Feb 2015 07:24:26 +0100
Miroslav Lichvar <mlich...@redhat.com> wrote:
> On Wed, Feb 25, 2015 at 04:07:05PM -0800, Gary E. Miller wrote:
> > # ipcs -m
> >
> > ------ Shared Memory Segments --------
> > key shmid owner perms bytes nattch
> > status 0x4e545030 0 root 600 96
> > 2 0x4e545031 32769 root 600 96
> > 2 0x4e545032 65538 root 600 96 2
> > ^^^
> >
> > Ah. I started phc2sys before chronyd and phc2sys created the
> > ntpshm with the wrong permissions! NTP2 should be perms 666, not
> > 600. That should be an easy bug to fix.
>
> phc2sys and chronyd both create all segments with 600 permissions. In
> chronyd this is configurable with the mode refclock option, but the
> default is always 600. As everything is started as root I'm not sure
> why would 666 be needed.
Yes, but that is not the case for ntpd where segments 2 and beyond are
created 666. Regardless of why, it has caused me problems. My problem
description may not be perfect, but there is a problem there.
> > So, stop everything, and change to a new ntpd that can read from a
> > 600
>
> Hm, why would ntpd or chronyd not be able to read from a 600 segment?
Because they dropped root.
> They are both started as root and open the segment before they drop
> the root privileges.
Ah, no, not always. gpsd opens shmid as needed in control mode.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
g...@rellim.com Tel:+1(541)382-8588
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