Re: New ELF packages available
> > Changed ld-linux.so to map files with MAP_DENYWRITE to
> > keep them from being changed while the file is in use
> > (Rick Sladkey).
> Woa there ! Under what circumstances can I map a file with
> MAP_DENYWRITE ?
> If I can prevent a user updating their files simply by opening them
> for reading and then mmapping them with funny options there is a bug
> in the kernel.
> It seems to me that this feature is not even required. In general
> shared libraries are only created by (and hence writeable by) the
> sysadmin (who should follow the library upgrade release notes) or by
> clueful users (who deserve what they get if they write to in-use
I don't understand your objection. The kernel already does this for
a.out binaries and libraries and the ELF dynamic linker. How else do
you propose to prevent binaries/libraries which are in use from being
opened for writing?
If you feel this is a permission problem, you should take it up with
Linus. It's been in the kernel for quite some time.
David Engel Optical Data Systems, Inc.
firstname.lastname@example.org 1101 E. Arapaho Road
(214) 234-6400 Richardson, TX 75081