[pacman-dev] Checking free space before transaction

[Nezmer]

On Wed, Nov 10, 2010 at 02:43:16PM -0600, Dan McGee wrote:
> On Wed, Nov 10, 2010 at 1:16 PM, Eric Bélanger <snowmaniscool at gmail.com> wrote:
> > On Tue, Nov 9, 2010 at 10:47 PM, Allan McRae <allan at archlinux.org> wrote:
> >> Hi,
> >>
> >> I have implemented some basic disk space checking in pacman.  The code is
> >> still a bit rough and there are some TODOs in there (especially related to
> >> output).  But the basics are all there, so it seems time to get some
> >> comments.
> >>
> >
> > I only glanced at the code so this might not be relevant.
> >
> > -Does it work if you have other partitions like /usr, /var , etc... ?
> >
> > -I like the idea of putting option in pacman.conf. If someone has an
> > exotic partitionning scheme that makes pacman unable to calculate the
> > actual disk space, then they can disable the disk space checking.
> 
> Your glance was much too quick. The whole point of this was to get rid
> of the dumbassness of "dur I have magic number size to hit" type
> checking. For this, you don't have to map partitions yourself, you
> don't do anything- it gets your partition map, figures out where each
> file is going to end up, sums up the necessary blocks per partition
> gained/lost (not even bytes which could still be wrong), and then
> finally decides whether the install can proceed.
> 
> -Dan
> 

Good luck with that. If It eventually works, It would be great.

I made some minor changes to make Allan's code compile in FreeBSD. I'm
not sure the changes I made were correct(After all, I don't know much
beyond hello world in C). But with those changes pacman did not like my
ZFS pool.

So, this code might only work in GNU or with only classic FSes.