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Date: Wed, 5 Aug 2015 19:41:14 +0300
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: cygwin AT cygwin DOT com
Message-ID: <1324339149.20150805194114@yandex.ru>
To: Corinna Vinschen <cygwin AT cygwin DOT com>, cygwin AT cygwin DOT com
Subject: Re: [ANNOUNCEMENT] Updated: Cygwin 2.2.0-1
In-Reply-To: <20150805075435.GP17917@calimero.vinschen.de>
References: <announce DOT 20150803131950 DOT GA18878 AT calimero DOT vinschen DOT de>   <55BFB64C DOT 1010802 AT towo DOT net> <20150803192940 DOT GA19315 AT calimero DOT vinschen DOT de>  <loom DOT 20150804T094839-714 AT post DOT gmane DOT org>  <895515CC-6BB7-41E7-AEA5-30FBBE071153 AT etr-usa DOT com>  <87wpxac2bj DOT fsf AT Rainer DOT invalid> <20150805075435 DOT GP17917 AT calimero DOT vinschen DOT de>
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Greetings, Corinna Vinschen!

> The problem the fix was *supposed* to fix (but it didn't) was to disallow
> incoming $HOME values which are non-POSIX or non-absolute paths.  These
> $HOME values should be disregarded.

> So the idea was:

>   set HOME=foo          <- ignored, set HOME from passwd DB entry
>   set HOME=C:/foo       <- same
>   set HOME=//foo/bar    <- same
>   set HOME=/foo/bar     <- valid, taken

> Right now, when started from a non-Cygwin process, Cygwin takes the
> value of $HOME and simply calls the Win32->POSIX conversion function.
> It does so for a long time, but is that right?  Especially if %HOME% is
> a non-absolute == relative path, the resulting POSIX value of $HOME
> depends on the current directory when starting Cygwin.

> This sounds like a terrible idea to me.

Agree.

> Together with cases like https://cygwin.com/ml/cygwin/2015-07/msg00344.html,
> and the fact that $HOME has no meaning in native Windows (HOMEPATH/HOMEDRIVE
> instead) I'm inclined to think that any incoming $HOME should make sense
> from a POSIX POV, otherwise we take the value from the passwd DB as defined
> by /etc/nsswitch.conf.

> Does anybody have a *good* reason *not* to change this?

For me, it wouldn't change a thing. My %HOME% is pointed to %USERPROFILE%, so
does the nsswitch.conf do the same for Cygwin.
Either way the $HOME is pulled from will point to the same place.

>> That's why I offered to ignore the issue.  That also needs nothing to be
>> done by me, which is an added benefit.  :-)

> That may be the way to go as soon as Cygwin is doing the right thing :}

:)
Do The Right Thing(tm)!


-- 
With best regards,
Andrey Repin
Wednesday, August 5, 2015 19:34:27

Sorry for my terrible english...


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