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Date:	Tue, 29 Apr 2025 13:02:18 +0300
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To:	"Agnihotri, Alok Kumar" <alokkumar DOT agnihotri AT philips DOT com>,
	cygwin AT cygwin DOT com
Subject:	Re: Request for Assistance: Non-Functioning Commands in Cygwin
	Environment
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From:	Andrey Repin via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Andrey Repin <anrdaemon AT yandex DOT ru>
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Greetings, Agnihotri, Alok Kumar!

This list uses a bottom-posting for easier navigation of reply history.

>>> Dear Cygwin Technical Support Team,
>>> I hope this email finds you well.
>>> My name is Alok Agnihotri, and I am part of the Philips organization. We
>>> are utilizing Cygwin in our environment to execute SSH commands remotely on
>>> Windows-based machines, supporting various  activities critical to our operations.
>>> We are currently facing an issue where certain standard commands are not
>>> recognized or are failing to execute within the Cygwin environment.
>>> The list of affected commands includes:
>
>>>   * wmic
>>>   * perl
>>>   * egrep
>>>   * zip
>>>   * awk
>>>   * env
>>>   * head
>>>   * portqry
>>>   * reg query
>
>> egrep is obsolete (use `grep -E`), but it should work (see below).
>> To the other commands, awk, env, head - should work (reinstall and rebase
>> Cygwin if that's not the case). Same for zip and perl, if those are Cygwin
>> executables (make sure you actually have them installed).
>> In general, if you have silent crashes of Cygwin programs, it's often the
>> memory allocation issue, which could be caused by Cygwin installation when any
>> of the Cygwin processes running during package install. Setup could only
>> detect processes running when you start it, but if any of them are started and
>> still running when setup is actually installing packages, THAT could be a
>> problem. Another source of this issue is a badly behaving "antivirus"
>> injecting its libs at the wrong time in the wrong place. The third cause could
>> be forced ASLR. Cygwin's fork implementation is sensitive to address space
>> layout changes. Don't do that for Cygwin.
>
>> To the portqry, wmic and reg, IDK what is your issue. May be update Cygwin and
>> try again? There were changes in socket code regarding pipelining.

> Thanks for  your quick response .

> Can you please suggest which Cygwin version should be use so that we dont
> face issue with these commands .

There's no such thing as "Cygwin version" aside from the Cygwin1 DLL itself.
Cygwin as an application is a package management system that helps you install
the packages you want in an easy way.
As I outlined above, the problem could come from more than one source.
First thing should be a clean upgrade in either way, making sure no suddenly
spawned Cygwin processes could interfere with it. Then (if that didn't help)
`rebase-trigger full` with subsequent run of setup.exe (see docs for details).
After that, it's likely an external issue (AV/OS interfering), and there's
steps and hints to diagnose and mitigate it in the list archives.


-- 
With best regards,
Andrey Repin
Tuesday, April 29, 2025 12:52:45

Sorry for my terrible english...


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