Bug#542915: pbuilder: removes data from bind-mounted directories

[Loïc Minier]

On Fri, Sep 18, 2009, Jakub Wilk wrote:
> First of all, you should not close a bug without a proper explanation.
> 
> mount and rm does exactly what they are meant to do (and what is
> documented). This is not true for your package.
> 
> In fact, this bug is easily fixable:
> - In most cases, `umount -a` called inside chroot does unmount
> everything that should be unmounted.
> - If it does not (i.e. if /proc/mounts contents changed during a
> build), pbuilder should refrain from rm-Rf-ing the chroot.

 It seems pbuilder doesn't rm -r (it uses find -xdev to rm -f all
 non-directories and then rmdir on dirs; it could as well use rm
 --one-file-system IMO) see clean_subdirectories() in pbuilder-modules;
 it also has some logic to check for mounts not having been properly
 unmounted (seems_truly_unmounted() in pbuilder-modules).  Perhaps
 you're hitting another rm such as the hooks one?

-- 
Loïc Minier