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Subject: Re: Quotes around command-line argument that has unicode characters are not removed
To: cygwin@cygwin.com
References: <08d9621d-b9a0-c0d7-b58b-581ab957a08c@mail.ru> <1547310513.20180322142446@yandex.ru>
From: Thomas Wolff <towo@towo.net>
Message-ID: <80cca6dd-f7a7-3dda-9c95-8bfb9e97956d@towo.net>
Date: Fri, 23 Mar 2018 08:39:21 +0100
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Am 22.03.2018 um 12:24 schrieb Andrey Repin:
> ...
>> when I put quotes around file that has
>> non-ASCII symbols, these quotes are passed to argv of the process literally,
>> otherwise they are removed. I would expect that there is a consistency.
> Parameter unquoting done by the shell.
> CMD does that differently from POSIX shells.
cmd.exe applies some inconsistent "smart" (in an MS sense...) magic 
quoting; it adds additional quotes if the parameter contains non-ASCII 
characters.
>> I have written a small C program that displays arguments, and run it three times:
> ...
You can also test this with cygwin /bin/echo:
C:\cygwin\bin>.\echo "bla"
bla

C:\cygwin\bin>.\echo "blö"
"blö"

This is also the reason why 'chere' fails on non-ASCII directories.

>> As one can see, the last run fails. I am a bit puzzled: how can I pass the name
>> of the file with space and Unicode symbols? I need to do it in uniform way, as I
>> am calling a Cygwin program from native Windows program, as in [1].
Due to the weird cmd.exe behaviour, you cannot. However, cygwin could 
apply a workaround by magic unquoting.

Thomas

>> Any feedback is appreciated.
>> [1] https://sourceware.org/ml/cygwin/2016-05/msg00082.html
>> [2] http://daviddeley.com/autohotkey/parameters/parameters.htm
>> [3] https://cygwin.com/cygwin-ug-net/using-specialnames.html#pathnames-at
>> [4] https://github.com/openunix/cygwin/blob/master/winsup/cygwin/dcrt0.cc#L177

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