On Friday 10 June 2005 07:34, Karl Chen wrote: > Hi, I'm doing some large-scale security experiments on Debian > security. I'm using UML to do the whole thing on a cluster.
> Hostfs seems to make everything owned by root -- even files > created by non-root users. So you are running uml as root? Or you are running UML as non-root but with hostfs as root filesystem? In this case you're possibly seeing the result of a trick made to make it work well... but I don't know if that trick is present in the UML version you're using. > I'm currently using 2.4.26-3 (Debian > package). Hmm, in that case > I found a few posts via Google mentioning a patch to > fix this, but no other information. What is the modified behavior > of hostfs permissions? Has this been integrated into a newer > version, or is it in cvs, or if not, are there plans to? Well, there are: 1) HUMFS, implementing the ideal behaviour below 2) a patch posted by somebody for when UML is run by root, to allow created files to get the UID of the process creating it inside UML. > [I think the ideal behavior, if UML is running as non-root, would > be if there were a temporary mapping of ownership (e.g. so chown > works) -- but that would be a lot of work to implement.] Well, this work has been started but is currently stalled because of other ongoing work, however I hope we'll resurrect that shortly. > I would be happy if there were uid and gid mount options as many > other fs types have -- to treat all files in the entire mount as > owned by a particular user/group. Well, I'm going to add those options to UML 2.6 but I'll be able to work on this only next week... However this should not be too much work. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894) http://www.user-mode-linux.org/~blaisorblade ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ User-mode-linux-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
