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Date: Sat, 2 Aug 2025 14:01:51 +0900
To: cygwin AT cygwin DOT com
Subject: Re: Incorrect command line handling when launching Cygwin program
 from Windows
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From: Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Fri, 1 Aug 2025 15:34:16 +0000
"Old, Oliver" wrote:
> > >echo-win32.exe C:\"Program Files"\
> > echo-win32.exe
> > C:"Program
> > Files\
> >
> > Is this as you expected?
> >
> > >echo.exe C:\"Program Files"\
> > echo
> > C:\Program Files\
> >
> > This makes more sense to me.
> 
> That is as expected. It is the way a Windows program would split the
> command line. To me, it does not make sense that Cygwin programs process
> the command line, which was produced by a Windows program, in a manner
> which is inconsistent with how a Windows program would.
> 
> If the sole purpose of taking a Windows command line is being able to be
> called from a Windows program, how does it make sense to diverge from
> Windows' parsing logic, aside from handling at-files?

So, shouldn't you be complaining abount PowerShell as well?
PS C:\> .\echo-win32.exe C:\"Program Files"\
C:\echo-win32.exe
C:\Program Files"
PS C:\> .\echo-win32.exe a b\"c\" d
a
b\c\
d

Moreover, you might complain about bash:
$ ./echo.exe C:\Windows\System32 '"' '\'
./a
C:WindowsSystem32
"
\

> ./echo-win32.exe C:\Windows\System32 '"' '\'
echo-win32.exe
C:\Windows\System32
'' '\'

cygwin does not treat \ as a quote if it is passed from non-cygwin shell.
When a Cygwin program is launched from a non-Cygwin shell, I personally
find it more natural for it to follow quoting semantics similar to Bash.

I'm afraid that's not the case...

> It sadly breaks builds driven by Windows-native tools since they expect
> the standard command line handling.

Isn't that the responsibility of the "Windows-native tool"? If it invokes
cygwin build tool, it should pass the arguments in a way that conforms to
cygwin's conventions.

BTW, what exactly is the "Windows-native tool"?

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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