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Date: Mon, 14 Aug 2023 01:35:02 -0600
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Subject: Re: Entering Cygwin command line (bash login) from Windows cmd.exe ?
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From: Brian Inglis via Cygwin <cygwin@cygwin.com>
Reply-To: cygwin@cygwin.com
Cc: Brian Inglis <Brian.Inglis@Shaw.ca>, Martin Wege <martin.l.wege@gmail.com>
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On 2023-08-13 11:40, Martin Wege via Cygwin wrote:
> On Sun, Aug 13, 2023 at 12:53 AM Roland Mainz via Cygwin wrote:
>> On Mon, Aug 7, 2023 at 7:38 AM KAVALAGIOS Panagiotis (EEAS) via Cygwin wrote:
>>>> On Sat, Jul 29, 2023 at 6:18 AM Roland Mainz wrote:
>>>>> Is there an official way to enter the Cygwin command line (e.g. bash
>>>>> login) from Windows cmd.exe, e.g. if someone ssh's into a Windows
>>>>> machine he/she ends/up in a cmd.exe and not bash...

>>> You may run your favourite shell from the bin directory of your Cygwin installation:
>>> "C:\Program Files\Cygwin\bin\bash.exe"
>>> "C:\Program Files\Cygwin\bin\tcsh.exe"
>>> replace " C:\Program Files" with your target Cygwin installation directory root.

>> Turns out my problem was simply that I forgot that just typing "bash"
>> only gives me an interactive shell, which sources only the interactive
>> shell configs (e.g. /etc/ksh.kshrc + ~/.kshrc for ksh93, and
>> /etc/bash.bashrc + ~/.bashrc for bash), but not the login configs
>> (e.g. /etc/profile + ~/.profile).
>> So the simple fix was just to type:
>> C:\Program Files\Cygwin\bin\bash.exe --login
>> or
>> C:\Program Files\Cygwin\bin\ksh93.exe --login
>> P.S.: Which reminds me - is there a way to contribute a Cygwin ksh93 package ?

> We would greatly appreciate a Korn Shell 93 package, preferably with
> some POSIX builtin commands.

$ cygcheck -p Korn
Found 6 matches for Korn
mksh-53a-1-src - mksh-src: MirBSD Korn Shell (source)
mksh-54-1-src - mksh-src: MirBSD Korn Shell (source)
mksh-56c-1-src - mksh-src: MirBSD Korn Shell (source)
mksh-53a-1 - mksh: MirBSD Korn Shell
mksh-54-1 - mksh: MirBSD Korn Shell
mksh-56c-1 - mksh: MirBSD Korn Shell

https://cygwin.com/packages/summary/mksh-src.html

POSIX only standardizes the POSIX shell sh (install man-pages-posix for docs).
Cygwin provides the dash POSIX compatible shell preinstalled as a base package.

Each shell provides its own builtins which may be similar, or have differnet 
names, and sufficient differences, to keep shell programmers in a job.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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