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X-HELO: calimero.vinschen.de
Date: Mon, 8 Aug 2016 16:03:26 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: PATHEXT is fundamental to Windows and Should be recognised by CYGWIN
Message-ID: <20160808140326.GR25811@calimero.vinschen.de>
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References: <001001d1edf1$a4e1ae90$eea50bb0$@rogers.com> <1C0AE95E-0118-4353-AA77-4D41F1AE9AE1 AT solidrocksystems DOT com> <001a01d1eea9$f7949a90$e6bdcfb0$@rogers.com> <76ec05e9-140a-19cb-942b-698582c3d024 AT gmail DOT com> <001f01d1ef2c$f04af9e0$d0e0eda0$@rogers.com> <20160805152951 DOT GO25811 AT calimero DOT vinschen DOT de> <57A6ED1C DOT 1060402 AT gmx DOT de> <20160808112321 DOT GF32150 AT calimero DOT vinschen DOT de> <e90174df-61b4-17c8-064b-30009e6ad559 AT gmail DOT com>
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On Aug  8 09:43, cyg Simple wrote:
> On 8/8/2016 7:23 AM, Corinna Vinschen wrote:
> > On Aug  7 10:11, Herbert Stocker wrote:
> >> On 05.08.2016 17:29, Corinna Vinschen wrote:
> >>  If you see the
> >>> code required to handle .exe and .lnk extensions you don't *want*
> >>> PATHEXT support anymore.
> >>>
> >>
> >> Moreso, this code has recently broken my C++ code in Cygwin.
> >> It tried to see if a directory  /dir/subdir/something  existed,
> >> and Cygwin said yes because it found a /dir/subdir/something.exe .
> >> So my program failed.
> >=20
> > I have some doubt here.  Cygwin always checks for "foo" first.
> > Only if it doesn't find "foo", it checks for "foo.exe", then
> > for "foo.lnk" and last, for backward compat, for "foo.exe.lnk".
> >=20
>=20
> Which is the exact cause of the issue.
>=20
> > In the POSIX realm, "foo" =3D=3D "foo.exe" =3D=3D "foo.lnk".  The searc=
h itself
> > is indiscriminately, because Cygwin can't know if you're looking for
> > "foo" or "foo.exe" or a symlink "foo" using the .lnk suffix.
>=20
> Why do you say "In the POSIX realm"?  Only Cygwin does this association.
>  I understand why it does so but is there a different way to achieve the
> same thing with greater accuracy?

No, sorry, but no.  Every time you start to double guess what the
application is looking for in a certain scenario, you lose.  See
the example I just made up in=20

https://cygwin.com/ml/cygwin/2016-08/msg00124.html

And it's just *one* very simple example.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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