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Date:	Sun, 14 Dec 2025 14:05:45 +0300
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To:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>, cygwin AT cygwin DOT com
Subject:	Re: group '545' does not exist ?
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From:	Andrey Repin via Cygwin <cygwin AT cygwin DOT com>
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Greetings, Marco Atzeri!

> On 05/12/2025 19:48, Corinna Vinschen via Cygwin wrote:

>>> Right now, our newgrp is commandline compatible with Linux' newgrp from
>>> shadow-utils:
>>>
>>> - A single '-' reinitializes the environment.
>>> - The group must be given as name, not as GID.
>>>

> Hi Corinnathe current version of newgroup is NOT doing so.
> It spins a new shell process

IIRC, that's the only way to create a new environment in Windows by an
external process.
If you take a look at the exec's implementation, it also starts a small code
to manage the spawned process.

> $ pstree
> ?─┬─?───sshd
>    ├─mintty───bash───pstree
>    └─ssh-agent

> $ newgrp - Users

> $ pstree
> ?─┬─?───sshd
>    ├─mintty───bash───bash───pstree
>    └─ssh-agent


> Noticed as it is very easy to bomb the enviroment.


-- 
With best regards,
Andrey Repin
Sunday, December 14, 2025 14:02:50

Sorry for my terrible english...

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