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Subject:	Re: sed seems to force UC filename on Mixed 8.3 filenames on FAT32
To:	cygwin AT cygwin DOT com
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From:	cyg Simple <cygsimple AT gmail DOT com>
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Date:	Sun, 4 Mar 2018 12:05:55 -0500
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On 3/4/2018 11:14 AM, Brian Inglis wrote:
> On 2018-03-04 03:09, Corinna Vinschen wrote:
>> On Mar  3 11:14, Brian Inglis wrote:
>>> On 2018-03-03 01:36, Fergus Daly wrote:
>>>>>> Run stat on original and converted files.
>>>>
>>>> OK. I get this:
>>>>
>>>> ~> stat /j/PStart.xml
>>>>   File: /j/PStart.xml
>>>>   Size: 7233            Blocks: 8          IO Block: 65536  regular file
>>>> Device: a6418e7fh/2789314175d   Inode: 7206475022584976007  Links: 1
>>>> Access: (0644/-rw-r--r--)  Uid: (197609/ fergusd)   Gid: (197609/ fergusd)
>>>> Access: 2018-03-03 00:00:00.000000000 +0000
>>>> Modify: 2018-03-02 11:50:12.000000000 +0000
>>>> Change: 2018-03-02 11:50:12.000000000 +0000
>>>>  Birth: 2018-03-02 09:26:44.060000000 +0000
>>>>
>>>> ~> dos2unix.exe /j/PStart.xml
>>>> dos2unix: converting file /j/PStart.xml to Unix format...
>>>>
>>>> ~> stat /j/PSTART.XML
>>>>   File: /j/PSTART.XML
>>>>   Size: 6943            Blocks: 8          IO Block: 65536  regular file
>>>> Device: a6418e7fh/2789314175d   Inode: 7206475022584976007  Links: 1
>>>> Access: (0644/-rw-r--r--)  Uid: (197609/ fergusd)   Gid: (197609/ fergusd)
>>>> Access: 2018-03-03 00:00:00.000000000 +0000
>>>> Modify: 2018-03-03 08:27:16.000000000 +0000
>>>> Change: 2018-03-03 08:27:16.000000000 +0000
>>>>  Birth: 2018-03-03 08:27:15.210000000 +0000
>>>>
>>>> Does that help at all?
>>>>
>>>> It's not so much the behaviour on FAT32, which I could put up with as
>>>> a filesystem pehenomenon if it had always been the case: but it's just
>>>> started in the past few days. Can't think what has been updated that
>>>> would cause this change. Previously sed and dos2unix which I use
>>>> constantly (and others) did NOT change the case of the filename.
>>>
>>> Should only be possible if Std C rename was changed in newlib/Cygwin1.dll
>>> updates
>>
>> No changes there, certainly not renaming the file to all uppercase.
> 
> Not suggesting any deliberate impact from newlib/Cygwin but any change could
> result in different Windows calls in the emulation layer, or the cause could be
> as in the rest of the sentence trimmed:
> 
> ..."or operation on FAT32 was changed by Windows updates."
> 

IIRC, the original FAT only allowed uppercase file names.  Maybe some
emulation switch is on as a result of such updates at the Windows level.

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