On Mon, Apr 18, 2016 at 02:51:37PM +0300, Yuriy M. Kaminskiy wrote:
> Karel Zak <kzak@xxxxxxxxxx> writes:
>
> > On Fri, Mar 18, 2016 at 05:26:25AM +0300, Yuriy M. Kaminskiy wrote:
> >> I think this issue should be at least documented. And, maybe, default
> >> `--propagation` should be changed to `slave`.
> >
> > The reason why we use 'private' is that it's the kernel default for
> > years and it's what has been expected by users for long time before we
> > introduced --propagation and any unshare(1) default.
> >
> > The current --propagation default unifies things and makes unshare(1)
> > portable to distributions where root fs is mounted as 'shared' (e.g.
> > systemd distros) and all this in backwardly compatible way for users
> > who have no clue about --propagation.
> >
> > So, I don't think we want to change any default to corrupt scripts where
> > is no explicitly specified --propagation.
>
> By you already broke scripts that expected old a-la '--propagation
> unchanged' behavior.
Only if your system uses something else that kernel default 'private'
and you depend on this non-default setting. (IMHO relatively small
groups of users)
The old "--propagation unchanged" makes unshare useless on some
mainstream distros where default is 'shared'.
Anyway, we will not change any default now.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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