Hi, I have "finished" the disk space checking implementation. The only TODO left is to add the statvfs version of getmntinfo code path (NetBSD), but otherwise I consider this done. The calculations done are quite good but it is near impossible to be exact (e.g. adding/removing a block for directories but only once across the transaction, .pacsave/.pacnew files, filelist db files). I suppose I could add a block for those and not remove blocks to get an upper limit. However, the difference will likely be orders of magnitude smaller than the transaction size so I am not sure it is worth further effort... As far as the interface goes, the check is performed only when the CheckSpace option is given in pacman.conf. We also get a nice progress bar in pacman while the check is being performed (think of what is displayed during file conflict checking). See the work here: http://projects.archlinux.org/users/allan/pacman.git/diff/?h=diskspace&id2=working I need to rebase that branch into useful commit(s), but the overall changes are rather small (12 files changed, 447 insertions, 2 deletions - with 365 of those additions being in two new files). So I think code review can happen now. I am looking for comments on code correctness and very specific implementation details only. Anything other than that needs to be submitted in patch form... Allan