Messages in this thread | | | Date | Thu, 24 Feb 2000 09:10:38 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: permissions not honoured by /bin/pwd aka getcwd |
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On Thu, 24 Feb 2000, Harald Kirsch wrote:
> On Thu, Feb 24, 2000 at 08:18:17AM -0500, Richard B. Johnson wrote: > > On Thu, 24 Feb 2000, Harald Kirsch wrote: > > > Why is /bin/pwd (or getcwd) allowed to return an output in the following > > > command sequence? > > > > > > > > > % mkdir -p really/closed; cd really/closed; chmod 000 ..; /bin/pwd > > > /home1_phys/kir/sunHome/tmp/really/closed > > > > > > Harald Kirsch > > > > Because permissions don't prevent you from reading a directory. > > Strange answer. What is `chmod a-r some/directory' good for if not to > forbid reading a directory? > > Harald Kirsch
If prevents non-root from reading (i.e. entering) the directory. You are never going to hide the directory contents from root.
Here is a non-root user:
Script started on Thu Feb 24 09:07:10 2000 $ pwd /tmp $ mkdir foo $ mkdir foo/bat $ ls foo typescript $ ls foo/* $ cd foo $ ls bat $ cd .. $ ls foo typescript $ chmod 0 foo $ ls foo typescript $ cd foo bash: foo: Permission denied $ ls foo/* ls: foo/*: Permission denied $ exit exit
Script done on Thu Feb 24 09:08:37 2000
Cheers, Dick Johnson
Penguin : Linux version 2.3.41 on an i686 machine (800.63 BogoMips).
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