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X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Tue, 4 Feb 2003 18:57:37 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Salvo <salvo AT scicli DOT com>
cc: cygwin AT cygwin DOT com
Subject: RE: logis as root?
In-Reply-To: <001401c2cca5$14d52ba0$81dcb9c2@wittgenstein>
Message-ID: <Pine.GSO.4.44.0302041839090.24195-100000@slinky.cs.nyu.edu>
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Salvo,

On Wed, 5 Feb 2003, Salvo wrote:

> Hi Igor :-)
>
> >First off, to avoid that "permission denied" message, make sure your
> >mounts of "/", "/usr/bin" and "/usr/lib" are system mounts, not user
> >mounts.  Try cutting and pasting the output of
> >$ mount -m | grep -i cygwin | sed 's/ -u / -s /'
>
> I obtain this output:
> "$ mount -m | grep -i cygwin | sed 's/ -u / -s /'
> mount -f -s -b "C:/cygwin/usr/X11R6/lib/X11/fonts" "/usr/X11R6/lib/X11/fonts"
> mount -f -s -b "C:/cygwin/bin" "/usr/bin"
> mount -f -s -b "C:/cygwin/lib" "/usr/lib"
> mount -f -s -b "C:/cygwin" "/" "
>
> >into your bash shell (after proper inspection, of course, and I also
> >suggest you save the full output of "mount -m" first so you can recover
> >your mount table if something goes wrong).  "man mount" for details.
>
> Ok, is it correct the above output?

Looks fine.  You can just paste all 4 of the above mount lines into your
shell.  This will re-mount all of your standard mounts as "system" mounts,
which will be seen by all users.

> >Now, as far as root is concerned, Unix programs think of "root" as uid
> >0. The Cygwin versions of those programs are usually patched to consider
> >uid 18 to be root (this corresponds to the LocalSystem account, which
> >has very high privileges on NT systems, unlike the Administrator
> >account).
>
> Right, can I control this with a command?

Control what?  The uid is hard-coded into the program source, at least in
the case of inetutils and procmail...  You can change the privileges of
other accounts to approach those of LocalSystem, but *this is not
recommended*.  You're much better off figuring out what xdm considers
"root" (maybe it just needs to run as a service or something).  Again, the
cygwin-xfree list is the place to go for that.  I suggest you post a new
message there with "xdm" in its subject (e.g., 'xdm says "Only root wants
to run xdm"' or something similar).

> >I'm not sure what xdm considers root (it's in the source, I'm sure).
> >You might have better luck asking on the <cygwin-xfree at cygwin dot
> >com> list, which is for all things X.
>
> Thanks!
>
> >P.S. Incidentally, which "su" are you using?
>
> 1.3.19: uname tell me
> "$ uname -a
> CYGWIN_NT-5.1 wittgenstein 1.3.19(0.71/3/2) 2003-01-23 21:31 i686 unknown unknown Cygwin"
>
> Regards
> Salvo

Umm, I actually asked about the "su" command, rather than the system
version...  In the future, try "which su" and "su --version" in response
to such a question (no need to do that now, as I've found that there's an -
apparently non-working - su.exe packaged in the latest "sh-utils"
package).
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

Oh, boy, virtual memory! Now I'm gonna make myself a really *big* RAMdisk!
  -- /usr/games/fortune


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