linux-kernel - Re: CONFIG_VFAT_FS

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Date:	Fri, 3 Jul 2009 03:58:22 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	tridge@...ba.org
cc:	Theodore Tso <tytso@....edu>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Pavel Machek <pavel@....cz>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	john.lanza@...ux.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org,
	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>, corbet@....net,
	jcm@...masters.org
Subject: Re: CONFIG_VFAT_FS_DUALNAMES regression


On Friday 2009-07-03 03:26, tridge@...ba.org wrote:
>
> > Making WINNT the default would cause many a `ls` output to just
> > scream at me in uppercaps because there are programs that
> > create long names with all-uppers.
>
>well, you could also argue that having WINNT in effect does the
>'correct' thing. It causes ls to display the name that is actually in
>the filesystem. 
>
>I think the current default for VFAT on Linux is rather misleading. It
>always displays 8.3 names as lowercase,

There is no misleading in that, since VFAT is rather case-insensitive.
Certainly, lowering all 8.3 names is more appalling to the eyes than
keeping all-caps-longnames that way. I think I would even add a new
heuristic for case transformation on display to fit my personal
guidelines which would be:

  ($file, $ext) = ($filename =~ /^(.*)\.(.*)$/);
  $ext = lc $ext;
  if ($file =~ /^[A-Z]+$/) {
      $file = lc $ext;
  }

I think none of the shortcase= options does that at this time.

>I should also point out that if we followed Alan's reasoning then we'd
>have to actually make all these options separate filesystems[...]

Linux has been doing case conversion all years long so I do not think
Alan's request to make new filesystems was based solely upon
shortname=; otherwise, I suspect, it would have raised it earlier.

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