Messages in this thread | | | Date | Mon, 7 Apr 2003 04:35:56 -0400 | From | Jakub Jelinek <> | Subject | Re: [PATCH] new syscall: flink |
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On Mon, Apr 07, 2003 at 10:18:00AM +0200, Olivier Galibert wrote: > On Mon, Apr 07, 2003 at 07:29:35AM +0000, Miquel van Smoorenburg wrote: > > Can't you just check those permissions, i.e. behave like link() ? > > If you cant't access the path to the file, don't permit flink() ? > > Which path ? A file can have many paths to it, or to the other > extreme none at all.
There is at most one path associated with an opened file - d_path on file->f_dentry. If a fd has no path, don't permit flink(). Alternatively, flink() could have 3 arguments, 2 like link and an opened fd, which would atomically do if fd describes the same object as buf, link buf to newname.
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