Re: r2558 made another use case for make_relative_to_its_root visible (else SEGFAULT)

[Felix Zielcke]

Am Freitag, den 04.09.2009, 21:26 +0200 schrieb Robert Millan:
> On Fri, Sep 04, 2009 at 08:52:44PM +0200, Felix Zielcke wrote:
> > r2558 actually enabled this code path which was (almost) never executed
> > before in probe():
> > 
> >       if (S_ISREG (st.st_mode))
> >         {
> >           /* Regular file.  Verify that we can read it properly.  */
> > 
> >           grub_file_t file;
> >           grub_util_info ("reading %s via OS facilities", path);
> >           filebuf_via_sys = grub_util_read_image (path);
> > 
> >           grub_util_info ("reading %s via GRUB facilities", path);
> >           asprintf (&grub_path, "(%s)%s", drive_name, path);
> >           file = grub_file_open (grub_path);
> >           filebuf_via_grub = xmalloc (file->size);
> >           grub_file_read (file, filebuf_via_grub, file->size);
> > 
> >           grub_util_info ("comparing");
> > 
> >           if (memcmp (filebuf_via_grub, filebuf_via_sys, file->size))
> >             grub_util_error ("files differ");
> >         }
> >       printf ("%s\n", fs->name);
> > 
> > If /boot is on a seperate partition and you run `grub-probe -t
> > fs /boot/grub/core.img' grub_file_open returns 0 because grub_path is
> > the full system path and not a relative path which GRUB needs.
> 
> A proper fix for this would be too intrusive for 1.97.  Unless someone
> has a bright idea, I'll comment it out untill we've released.

For the release this is probable the best idea.


-- 
Felix Zielcke
Proud Debian Maintainer