Patrick: > logs etc. to ram .. but sometimes I need modifications to be done > permanently, thus infact I would need that. > But isnt there another way? e.g. copying / mount-moving/binding > real_root to the union or something like that?
I think it depends on your initramfs. As long as you use initramfs, you cannot see /real_root, can you? If aufs introduces a new option which enables changeing permission mode of a hidden branch, you cannot write to it directly. But here is an idea, which might be rather complex operation. - introduce some mount options, + idel:<branch index> removes a branch specified by index, instead of path. + imod:<branch index>:<new permission> modifies a permission mode of the branch specified by index, instead of path. + imove:<old branch index>:<new branch index> re-order the branches, from <old> to <new>. it might be dangerous. + coo copyup on open + nocoo disables coo - mount -o remount,imod:1:rw,imove:1:0,imod:1:ro,coo /your/aufs - head -1 /your/aufs/whatever/you/want/to/copyup - mount -o remount,imod:1:rw,imove:1:0,imod:1:ro,nocoo /your/aufs Is that what you need? Junjiro Okajima ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV