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Date:	Fri, 06 Sep 2019 20:46:56 -0700
From:	L A Walsh <cygwin AT tlinx DOT org>
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To:	cygwin AT cygwin DOT com
Subject:	Re: Odd, is it not? mkdir 'e:\' cannot be undone by rmdir 'e:\' ...
References:	<bc3df101ab93c20b86c3ab7fa7d3ea4f AT xs4all DOT nl> <20190827152549 DOT GY11632 AT calimero DOT vinschen DOT de> <a47cc167b725c08e6f1c914166fabcaf AT smtp-cloud8 DOT xs4all DOT net> <3E262D05-F393-453A-9E43-B248DDE50812 AT solidrocksystems DOT com> <b97e4dbe952154efc68412540514ae81 AT smtp-cloud8 DOT xs4all DOT net> <20190828125939 DOT GL11632 AT calimero DOT vinschen DOT de> <421ac447-b249-da21-1ca5-228041cfc884 AT redhat DOT com> <20190828141556 DOT GM11632 AT calimero DOT vinschen DOT de> <20190828142220 DOT GN11632 AT calimero DOT vinschen DOT de>
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On 2019/08/28 07:22, Corinna Vinschen wrote:
> One problem here is, what to do about border cases like
>
>   $ mkdir a\/\/\/
>
> In theory slashes and backslashes should both be treated as dir
> separators.  Handling a case like this so that all expectations
> are satisfied is next to impossible, I guess.
>   
In a shell or as a quoted literal?  Under POSIX or under Windows?

In a shell it ends up as:

> pathcat a\/\/\/\/ b
a/b
> pathcat a\/\/ b
a/b

But as a quoted string, things don't get reduced unless last of first +
first of second are same:

> pathcat 'a\/\/' 'b'
a\/\/b                  # cuddled
> pathcat 'a\/\/' '/b'
a\/\/b                  # slash reduced
pathcat 'a\/\/' '\/b'
a\/\/\/b                # concat
pathcat 'a\/\' '\/b'
a\/\/\/b               # slash added as "\/b is assumed to be at ./\/b

Note that while posix may specify that mkdir 'a' and 'a/' should be the
same,
'a:' and 'a:\' are not (and would not be POSIX compliant).






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