chmod 670

External Since: Jan 11, 2007 Posts: 1

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.
- If the user is changed to someone other than you, but the group
remains the same, then you get full access.

Since the permissions are set to full access to the group, and I'm
part of that group, shouldn't I get full access to the directory?
Anyways, getting many '????' is very awkward.

Thank you very much!

Patricio

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External Since: Jan 09, 2007 Posts: 15

On Tue, Nov 13, 2007 at 01:25:35PM -0300, Patricio Rojo wrote:

> - If you try 'ls', then its contents are shown

Yes, because you have read permission.

> - If you try 'cd' to it, you get permission denied.

Yes, because you do not have search ("x") permission.

> - If you try 'ls -l', you get many interrogation signs (?????) instead
> of the properties of the file.

Yes, because you do not have search ("x") permission, so "ls" can not
get the requested information, but it still has to display _something_.

> - If the user is changed to someone other than you, but the group
> remains the same, then you get full access.

Yes, because group permission bits are used only if you are _not_ the
owner of the file.

> Anyways, getting many '????' is very awkward.

No, specifying "rw-" rights for a directory what is awkward. You get
what you've asked for.

Gabor

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Hungarian Academy of Sciences
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