On Oct 2 2007 13:39, Giuliano Gagliardi wrote: >> >> You could write up a LSM that restricts UID changing. > >Would you not consider it more useful to let one process have multiple user >ids? I do not see why they can have multiple group ids, but only (and >exactly) three user ids.
It would raise the complexity enormously. In the kernel, you currently do if (current->uid == inode->i_uid) or so. If you were to have multiple identities, that would evolve into a costly "if (in_user_p(inode->i_uid))" or so, much like in_group_p does it at the moment. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
