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Date:	Mon, 16 Dec 2024 16:00:57 +0300
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Message-ID:	<1475774521.20241216160057@yandex.ru>
To:	Federico Kircheis <federico AT kircheis DOT it>, cygwin AT cygwin DOT com
Subject:	Re: cygpath and unc paths
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From:	Andrey Repin via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Andrey Repin <anrdaemon AT yandex DOT ru>
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Greetings, Federico Kircheis!

>>> 1)
>>> root path, like C:\ , because for whatever reason \\?\C:\ is not valid, it
>>> has to be a subfolder (and trying to trick it with \\?\C:\\ does not work
>>> either).
>> > In which scenario?  \\?\C:\ is just the same as \??\C:\ in NT speak, and
>> that's a perfectly valid directory path.

> I've never seen \??\C:\.

> My test case, from powershell (which I do definitively _not_ know well
> enough, otherwise I wouldn't be using cygwin) was

> cd C:\             # success
> cd \\?\C:\         # fail
> cd C:\windows      # success
> cd \\?\C:\windows  # success

This way, you're testing command interpreter, not WinApi.

The command interpreter has its own ideas about what you can and can not use
with it.

> and repeat the same operation with dir instead of ls.

> The error message is that the "value of argument path is not valid"

F.e. Far manager works just fine with `goto:\\?\C:\`. More or less.


-- 
With best regards,
Andrey Repin
Monday, December 16, 2024 15:57:08

Sorry for my terrible english...


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