Re: tzsetup chroot

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On 02/03/15 17:05, Nick Frampton wrote:
> We have our own FreeBSD 10.1 installation script in which we call
> tzsetup.
> 
> I'm seeing different behaviour in tzsetup between these two
> invocations:
> 
> tzsetup -C /mnt chroot /mnt /usr/sbin/tzsetup
> 
> With the -C option, no matter which time zone I select, it asks:
> 
> Does the abbreviation 'UTC' look reasonable?
> 
> Using chroot, I get the expected behaviour, e.g. selecting 
> America/New_York:
> 
> Does the abbreviation 'EST' look reasonable?
> 
> /mnt contains the contents of base.txz, so it looks like all the 
> zoneinfo files are there.

Could you please submit a bug ticket for this?

It looks like what happens is that tzsetup does not really do a
chroot(2) system call.  Instead, it simulated the effect by prefixing
all paths with the chroot environment.

The problem is that when tzsetup is going to verify your
configuration, it would use tzset(3), which does not respect the
simulated chroot effect.  When no zoneinfo data is present, everything
would be considered as UTC.

Attached is an dirty hack (ugly enough that I don't wish to commit)
that changes tzsetup to use chroot instead, which should fix the
problem.  I'm not very satisfied with it as it does chroot() before
doing init_dialog, which may well fail as the devfs is not necessarily
mounted in the chroot, and on the other hand all termcap related data
would be sourced from the chroot, which is probably an undesirable
side effect.

Cheers,
- -- 
Xin LI <delphij_at_delphij.net>    https://www.delphij.net/
FreeBSD - The Power to Serve!           Live free or die
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