From: Hadmut Danisch <hadmut@danisch.de>
Date: Sat, 27 Dec 2025 14:44:09 GMT
Subject: Re: Git destroys u+s and g+s directory modes
Message-ID: <aU/wuT23Ybllu/1q@danisch.de>
In-Reply-To: <aU_lqe2Z47STv68O@kitsune.suse.cz>

On Sat, Dec 27, 2025 at 02:56:57PM +0100, Michal Suchánek wrote:
> 
> When you want it to be readable you do not need any special permission
> bits.
> 
> You can set the directories and files to be readable by group, and
> ensure the container user is part of the group.


And that's the problem: 

"ensure the container user is part of the group" is what the S_ISGID flag on directories is good for: It ensures that newly created directories inherit their parent's group. Unix administration basics. 

And this is the bit git clears and breaks this mechanism. 


regards

Hadmut