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Reply-To: Brian DOT Inglis AT SystematicSw DOT ab DOT ca
Subject: Re: case sensitivity bug?
References: <43ca1dd7-3042-88b1-dbb7-59b02f13d331 AT cornell DOT edu>
To: cygwin AT cygwin DOT com
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Message-ID: <6aa79b30-fa27-c5b6-e597-d40b82eee313@SystematicSw.ab.ca>
Date: Wed, 21 Sep 2016 10:32:26 -0600
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On 2016-09-20 18:33, Ken Brown wrote:
> I've set up my Cygwin installation to be case sensitive, following the instructions at
> https://cygwin.com/cygwin-ug-net/using-specialnames.html#pathnames-casesensitive
> But it doesn't seem to be working as I expect.  For example:
> $ mkdir a
> $ mkdir A
> $ ls -al [aA]
> a:
> total 100
> drwxr-xr-x+ 1 kbrown       None 0 2016-09-20 20:18 ./
> drwxrwxrwt+ 1 kbrown-admin None 0 2016-09-20 20:19 ../
> A:
> total 100
> drwxr-xr-x+ 1 kbrown       None 0 2016-09-20 20:19 ./
> drwxrwxrwt+ 1 kbrown-admin None 0 2016-09-20 20:19 ../
> $ mv a A
> mv: cannot move 'a' to a subdirectory of itself, 'A/a'
> Why does mv think that A and a are the same directory?
> Here's another example, where mv should simply do a rename, but it doesn't:
> $ rmdir A
> $ mv a A
> $ ls -al a
> total 100
> drwxr-xr-x+ 1 kbrown       None 0 2016-09-20 20:18 ./
> drwxrwxrwt+ 1 kbrown-admin None 0 2016-09-20 20:30 ../
> $ ls -al A
> ls: cannot access 'A': No such file or directory
> cygcheck output is attached.

Windows Win32 and WoW are case insensitive but case preserving where the underlying
filesystem supports case sensitivity; POSIX subsystem is case sensitive:

https://support.microsoft.com/en-us/kb/100625 (N.B. NT 3.1!)

Nitty gritties:

http://www.nicklowe.org/2012/02/understanding-case-sensitivity-in-windows-obcaseinsensitive-file_case_sensitive_search/

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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