On Sun, May 12, 2002 at 05:14:17PM -0400, Roland McGrath wrote:
> > Cool, I started implementing it when I noticed that it isn't too easy to
> > construct the mach_msg call from the inp.
>
> Sure it is.
Well, I will reserve my final judgement for the time when everything works
as it should :)
> > Likewise, I think that the msgh_local_port should be unchanged, so the
> > other server sends the reply directly to the user.
>
> Nope. The fields are swapped on the way through the kernel, so you have to
> swap them back. See rpctrace.
Cruel. So the code in libpager/demux.c is actually wrong in using the
remote part rather than the local port, I take it?
> > I have to think more about the problems that this doesn't solve.
>
> Do you mean the issue of peropen state that I mentioned, or something else?
Yeah, that one.
Ok, here is an update:
* in a fakeroot, running suid/sgid binaries doesn't work, it fails with
Operation not permitted. It seems that auth_makeauth fails:
83->20000 ( 82 0 "ids" "PWD=/" { 80 89 35} { 30 54 38 99 91 (null)}
{18 0 0 0 0} pn{135 127 129 92 134 120 119 90 12 75 0 89 91 92}
pn{117}) 67->21013 () = 0 {23 3 0 16297 1019142589 0 35309 1 0 0 6372
1021229047 0 1019142272 0 1019142514 0 8192 16 0 0 135676248 377 135356968
135356968 135356968 361 135357320 135357320 135356968 345 135357304}
38->25000 () = 0 1000 {1000 1000} 1000 {1000 1000}
38->25001 ( 9 0 {1000 0 1000} 1000 {1000 1000}) = 0x40000001 (Operation
not permitted)
I am not sure what happens here, but it seems to indicate that the way
programs are executed in a fakeroot is more like if the program comes from
fakeroot itself rather than the underlying filesystem.
* Creating pipe fails also with Operation not permitted, and I have no clue
yet why. /servers/socket/1 is correctly looked up (with flags being 0, by
the way), and then I don't think the pflocal server is even involved in
the matter. I will have to do more debugging here.
Thanks,
Marcus
--
`Rhubarb is no Egyptian god.' Debian http://www.debian.org [EMAIL PROTECTED]
Marcus Brinkmann GNU http://www.gnu.org [EMAIL PROTECTED]
[EMAIL PROTECTED]
http://www.marcus-brinkmann.de
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