Re: chmod 670

[Owen Townend <bowbowbow@optushome.com.au>]

On Tue, 2007-11-13 at 12:49 -0800, Andrew Sackville-West wrote:
> On Wed, Nov 14, 2007 at 07:22:45AM +1100, Owen Townend wrote:
> > 
> > On Tue, 2007-11-13 at 13:25 -0300, Patricio Rojo wrote:
> > > Hi,
> > > 
> > >   I don't know whether this is a bug or it is expected behavior.  If
> > > this is a bug I would appreciate someone telling me who to report it
> > > to:D...
> > > 
> > > 
> > >   I recently noticed that strange things happen if you do 'chmod 670' on
> > > a directory that you own, and whose group is set to one you belong.
> > > 
> > >  - If you try 'ls', then its contents are shown
> > >  - If you try 'cd' to it, you get permission denied.
> > >  - If you try 'ls -l', you get many interrogation signs (?????) instead
> > > of the properties of the file.
> 
> 
> can you provide the exact output from ls -l? Usually, ???????
> indicates some kind of filesystem damage.
> 
> A

Hey,
  I'm running Ubuntu 7.10 and was able to reproduce the behaviour.
  Also got the same result on my Etch box.

owen@mattimeo:~/TMP$ mkdir one; touch one/a one/b one/c;

owen@mattimeo:~/TMP$ ls -l
total 8
drwxr-xr-x 3 owen owen 4096 2007-09-02 00:29 one

owen@mattimeo:~/TMP$ ls -l one
total 4
-rw-r--r-- 1 owen owen    0 2007-09-02 00:29 a
-rw-r--r-- 1 owen owen    0 2007-09-02 00:29 b
-rw-r--r-- 1 owen owen    0 2007-09-02 00:29 c

owen@mattimeo:~/TMP$ chmod 670 one

owen@mattimeo:~/TMP$ ls -l one
total 0
?--------- ? ? ? ?                ? one/a
?--------- ? ? ? ?                ? one/b
?--------- ? ? ? ?                ? one/c

owen@mattimeo:~/TMP$ ls -l
total 8
drw-rwx--- 3 owen owen 4096 2007-09-02 00:29 one

owen@mattimeo:~/TMP$ uname -a
Linux mattimeo 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007
i686 GNU/Linux

  For kicks I booted a FreeBSD 6.2 VM and the behaviour was similar:

$ ls -l one
ls: a: Permission denied
ls: b: Permission denied
ls: c: Permission denied
total 0

cheers,
Owen.