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Date: Wed, 21 Aug 2002 10:26:07 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Odd permissions problem
Message-ID: <20020821102607.T26346@cygbert.vinschen.de>
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References: <3D613A17 DOT 30401 AT Salira DOT com> <20020820103858 DOT M26346 AT cygbert DOT vinschen DOT de> <3D627A79 DOT 4000101 AT Salira DOT com>
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On Tue, Aug 20, 2002 at 10:20:57AM -0700, Andrew DeFaria wrote:
> Corinna Vinschen wrote:
> 
> >On Mon, Aug 19, 2002 at 11:33:59AM -0700, Andrew DeFaria wrote:
> >
> >>This one has me stumped. Occasionally I get "permission denied" type
> >>problems when rsh'ing to a machine and creating or updating a file I
> >>would think I should be able to create or update. I don't understand why
> >>this happens. So I was playing around trying to categorize it:
> >>
> >>$ pwd
> >>/home/adefaria
> >>$ touch foo
> >>$ ls -l foo
> >>-rw-rw-r-- 1 adefaria Domain U 0 Aug 19 10:47 foo
> >>$ rm foo
> >>
> >>OK, I can touch and create files. Note /home/defaria is actually on a
> >>server (i.e. I've mounted //<server>/<share> to /home). However if I try
> >>to do this through rsh
> >>
> >>$ rsh $(hostname) touch foo
> >>touch: creating `foo': Permission denied
> >>
> >>it fails. Now I am myself:
> >>
> >>$ rsh $(hostname) "id && touch file"
> >>uid=1370(adefaria) gid=513(Domain Users) groups=0(Everyone),512(Domain
> >>Admins),513(Domain
> >>Users),1170(Everybody),1382(ITSupport),1354(Operations),1331(Software)
> >>touch: creating `foo': Permission denied
> >>
> >>Why is this?
> >
> >
> >Does `rsh hostname ls' actually list the files in your home dir?
> 
> Yes:
> 
> $ rsh $(hostname) ls -l
> total 19341
> [...]

Hmm, in theory you shouldn't have access to your home dir under rsh
since it's a share from another machine which isn't available to a
process running under a SYSTEM environment.  Except your home dir
is publically available (i. e., no authentication needed).

I don't understand what you're doing, probably.  Do you rsh to the
same machine as you're doing the first `pwd' on?  Or do you rsh to
the server which provides your home dir?  Did you try e. g. an

  rsh hostname echo foo > foo

to check if touch is performing unnecessary tests or an

  rsh hostname strace touch foo

to look into the strace what happens?

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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