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Re: fakeroot status
From: |
Marcus Brinkmann |
Subject: |
Re: fakeroot status |
Date: |
Wed, 15 May 2002 15:37:44 +0200 |
User-agent: |
Mutt/1.3.28i |
On Tue, May 14, 2002 at 09:06:44PM -0400, Roland McGrath wrote:
> The file_exec call on the interpreter (sh) is where it goes from there.
> That in turn results in an ordinary exec_exec of the interpreter file.
> If you're unclear on what happens after that, read exec.c:do_exec,
> S_exec_startup_get_info, and libc/hurd/hurdstartup.c.
Ah, the startup thing does it, I see now.
> > However, I verified that the /dev/fd/3 mechanism works in a non-fakeroot
> > environment.
>
> Hmm. Since it is getting the node to the underlying file in dtable[3],
> there shouldn't be any difference from fakeroot in how accessing /dev/fd/3
> works (unless the /dev/fd magic isn't working right).
Ha, that was way too easy with rpctrace. It turns out that /dev/fd/3 is
looked up in the namespace of the fakeroot translator, which conveniently,
but in a fundamentally broken way looks up the node and does all the MAGIC
interpretation itself.
So, the client gets to see whatever is fd 3 in fakeroot, which is invalid in
this case. The same should apply to all other magic retries.
The ultimate test was to set 3< /bin/bashbug in the fakeroot invocation, and
see! All scripts that were broken before invoke bashbug from there on :)
Now, this starts to look as if using file_name_lookup_under was not the best
choice. Can't we use dir_lookup directly?
Thanks,
Marcus
--
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann GNU http://www.gnu.org marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de
- Re: fakeroot status, (continued)
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/15
- Re: fakeroot status, Roland McGrath, 2002/05/15
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/15
- Re: fakeroot status, Roland McGrath, 2002/05/15
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/15
- Re: fakeroot status, Roland McGrath, 2002/05/15
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/15
- Re: fakeroot status, Roland McGrath, 2002/05/15
- Re: fakeroot status, Marcus Brinkmann, 2002/05/14
- Re: fakeroot status, Roland McGrath, 2002/05/14
- Re: fakeroot status,
Marcus Brinkmann <=
- Re: fakeroot status, Roland McGrath, 2002/05/15
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/15
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/14
- Re: fakeroot status, Marcus Brinkmann, 2002/05/14
- Re: fakeroot status, Thomas Bushnell, BSG, 2002/05/14