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Date: Sun, 9 Jan 2022 20:11:32 +0900 (JST)
From: Tatsuro MATSUOKA <tmacchant2 AT yahoo DOT co DOT jp>
To: Thomas Wolff <towo AT towo DOT net>, "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>,
        me <tmacchant2 AT yahoo DOT co DOT jp>
Message-ID: <1804805239.1181531.1641726692666.JavaMail.yahoo@mail.yahoo.co.jp>
Subject: Re: permission 600
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Reply-To: Tatsuro MATSUOKA <matsuoka AT nuce DOT nagoya-u DOT ac DOT jp>
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> ----- Original Message -----
> 
> From: "Thomas Wolff" 
> Date: 2022/01/09 日 17:51
> Subject: Re: permission 600
> Am 09.01.2022 um 07:10 schrieb Tatsuro MATSUOKA:
> >> ----- Original Message -----
> >>
> >> From: "Marco Atzeri"
> >> To: "cygwin> Date: 2022/01/09 日 14:39
> >> Subject: Re: permission 600
> >>
> >>
> >> On 09.01.2022 06:28, Tatsuro MATSUOKA wrote:
> >>> $ echo aaa > test.txt
> >>> $ ls -l  test.txt
> >>> -rw-r--r-- 1 user user 4 Jan  9 14:07 test.txt
> >>> $ chmod 600 test.txt
> >>> $ ls -l test.txt
> >>> -rw-r--r-- 1 user user 4 Jan  9 14:07 test.txt
> >> it works for me
> >>
> >> $ ls -l test.txt
> >> -rw-r--r-- 1 Marco Kein 4 Jan  9 06:35 test.txt
> >>
> >> $ chmod 600 test.txt
> >>
> >> $ ls -l test.txt
> >> -rw------- 1 Marco Kein 4 Jan  9 06:35 test.txt
> >>
> >> I suspect that having user and group called same
> >> is the clue
> >>
> > Ah! Thanks!
> >
> > Tatsuro
> Did you verify it by using different names?
> It can hardly be an explanation by POSIX means. If so, it must be some 
> weird consequence of Windows-specific stuff. Maybe a workaround could be 
> found for cygwin?

I made another windows account and sign in PC with different user name.
But result for chmod 600 gave the same results.
I found the workaround for jupyter by readind the code of "paths.py" in jupyter.

Tatsuro


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