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Bug#932644: reconfigure writes to /usr/lib/locale/locale-archive



On 2019-07-24 12:38, Marc Haber wrote:
> On Mon, Jul 22, 2019 at 07:20:42PM +0200, Aurelien Jarno wrote:
> > On 2019-07-21 17:11, Marc Haber wrote:
> > > Package: locales
> > > Version: 2.28-10
> > > Severity: minor
> > > 
> > > Hi,
> > > 
> > > reconfiguring the locales package updates the file
> > > /usr/lib/locale/locale-archive.
> > 
> > This is indeed where the libc looks for the compiled locales.
> 
> And it wouldn't follow a symlink to /var/lib/locale/locale-archive,
> where variable data would belong?

As said in my previous mail, those are not variable data, I do not see
the point of moving them to /var. They are only modified when the 
locales postinst script is run.

> > > I am not sure whether this is allowed by policy, hence severity: minor.
> > 
> > I do not find anything that prevents that in the policy. In addition
> > many other packages are also writing files to /usr when they are
> > configured (for example __pycache__ files or the various kernel
> > modules.* files used by depmod, udev hwdb.bin, etc.).
> 
> But they only do that on package installation. And: "look, how bad the
> neighbor is" is hardly an excuse. I happened to stumble upon that in
> locales, and it's the first time that I actually noticed that.

They do that exactly in the same situation than the locales postinst, ie
when the package is (re)configured. There is nothing in the policy
forbidding that. We can open a bug against the policy to confirm or
infirm that.

> > > Maybe this file would better be in /var.
> > 
> > /var is for files whose content is expected to continually change during
> > normal operation of the system. This is not the case of the
> > locale-archive file which doesn't change until the next reconfiguration
> > of the package. As such it doesn't prevent for example mounting the / or
> > /usr partition read-only once apt or dpkg have finished their work.
> 
> You're of course entitled to your opinion and I respect the decision.
> 
> Just assume:
> 
> - ansible/puppet/salt etc has a /etc/locale.gen which for some reason
>   doesn't have the current set of comments
> - a handler calls dpkg-reconfigure locales to handle the change in
>   /etc/locale.gen
> - locales rewrites /etc/locale.gen with the current set of comments
> - ansible/puppet/salt runs again, notices that /etc/locale.gen is not as
>   it should be according to its opinion
> - repeat starting with step 1

Looks like that is for the wrong bug report...

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net


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