On Aug 28, 2015 2:54 PM, "Andreas Grünbacher" <andreas.gruenbac...@gmail.com> wrote: > > 2015-08-28 23:36 GMT+02:00 Andy Lutomirski <l...@amacapital.net>: > > Silly question from the peanut gallery: is there any such thing as > > opening an fd pointing at a file such that the "open file description" > > (i.e. the struct file) captures the right to delete the file? > > > > IOW do we need FMODE_DELETE_SELF? > > When would that permission be checked, what syscall would you use to > unlink an open file descriptor?
Good point. It's remotely plausible that there's some trick with bind mounts, it's likely possible to unlink a directory by fd (using unlinkat), and you can *link* a file (with linkat or /proc), but unlinkat doesn't appear to allow you to unlink a file by fd. --Andy > > Thanks, > Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
