On Mon, 2010-03-15 at 17:32 +0100, Karel Zak wrote:
> On Fri, Jan 08, 2010 at 04:40:51PM -0500, Adam Jackson wrote:
> > --- a/mount/mount.c
> > +++ b/mount/mount.c
> > @@ -1075,6 +1075,12 @@ loop_check(const char **spec, const char **type, int *flags,
> > *loop = ((*flags & MS_LOOP) || *loopdev || opt_offset || opt_sizelimit || opt_encryption);
> > *loopfile = *spec;
> >
> > + if (!*loop) {
> > + struct stat st_buf;
> > + stat(*spec, &st_buf);
> > + *loop = S_ISREG(st_buf.st_mode);
> > + }
>
> Applied a little different version (see below).
>
> The problem with this feature is that mount(2) syscall allows to use
> regular files (or whatever) as the source argument. The interpretation
> of the source argument completely depends on filesystem driver. So you
> can create FS that is able to mount regular files...
That's... a little bizarre. But very orthogonal, I suppose. And I
can't imagine a sane filesystem that would behave differently when
pointed at a block device as at a regular file containing the same bits,
so this is probably safe.
Thanks for looking into this!
- ajax
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