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Message-ID: <5D732830.3090208@tlinx.org>
Date: Fri, 06 Sep 2019 20:46:56 -0700
From: L A Walsh <cygwin@tlinx.org>
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To: cygwin@cygwin.com
Subject: Re: Odd, is it not? mkdir 'e:\' cannot be undone by rmdir 'e:\' ...
References: <bc3df101ab93c20b86c3ab7fa7d3ea4f@xs4all.nl> <20190827152549.GY11632@calimero.vinschen.de> <a47cc167b725c08e6f1c914166fabcaf@smtp-cloud8.xs4all.net> <3E262D05-F393-453A-9E43-B248DDE50812@solidrocksystems.com> <b97e4dbe952154efc68412540514ae81@smtp-cloud8.xs4all.net> <20190828125939.GL11632@calimero.vinschen.de> <421ac447-b249-da21-1ca5-228041cfc884@redhat.com> <20190828141556.GM11632@calimero.vinschen.de> <20190828142220.GN11632@calimero.vinschen.de>
In-Reply-To: <20190828142220.GN11632@calimero.vinschen.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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