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Date: Wed, 7 Apr 2010 23:27:57 -0500 (CDT)
From: Tim McDaniel <tmcd AT panix DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Filesystem Filename touch fail [ was: PLEASE TEST YOUR FS ]
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On Wed, 7 Apr 2010, Morgan Gangwere wrote:
> On 4/7/2010 4:07 PM, Charles Wilson wrote:
>> One is a simple shared NTFS drive, I think (volinfo-1.txt). The
>> other is a weird distributed filesystem of some kind
>> (volinfo-2.txt).
>
> Both are NTFS unless one is not.
>
>> $ touch foo.
>> touch: cannot touch `foo.': No such file or directory
>
>> $ touch " foo "
>> touch: cannot touch ` foo ': No such file or directory
>
> Both of those are invalid under NTFS FS specifications:
> "Filenames may contain any character other than NULL (0x0000) but
> may not contain a space (ASCII 0x20, ' ') or period ('.')"

Where did you get that sentence?!  Googling found nothing but your
e-mail message.  That can't possibly be true for NTFS.  NTFS takes
spaces in directories (C:\Program Files\) and filenames
(...\Budget 2009.doc) perfectly well.  On a Windows XP system, I just
created a file named "C:\download\MySQL\foo bar.baz.txt" just fine:
created in Explorer, edited in Notepad, typed in CMD.

> Windows in kernel-space defines this restriction (as defined by Wikipedia):
> """
> 	Microsoft Windows: Windows kernel forbids the use of
> characters in range 1-31 (i.e., 0x01-0x1F) and characters " * : < >
> ? \ / |.  ...These restrictions only apply to Windows - Linux, for
> example, allows use of " * : < > ? \ / | even in NTFS.

Though / cannot be used in _filenames_ in Linux -- it's always a
directory delimiter.

> Since 'touch foo.' would result in doing an fileopen("foo.") this
> would be considered "bad" by Windows AND Linux ( I mounted an NTFS
> Partition and tried 'touch foo.' and was denied it)

In Linux using a Linux filesystem, it doesn't care in the slightest
about periods.  In Windows in CMD and Explorer, an attempt to rename
"C:\download\MySQL\foo bar baz" to
"C:\download\MySQL\foo bar baz." simply caused the trailing "." to be
ignored.

-- 
Tim McDaniel, tmcd AT panix DOT com

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