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Date:	Tue, 18 Feb 2025 20:29:41 +0100
To:	cygwin AT cygwin DOT com
Subject:	Re: [regression-3.6] df -k on Cygwin 3.6 no longer lists all
	filesystems
Message-ID:	<Z7TfpSKvHtBxPd9f@calimero.vinschen.de>
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	<e8ab61d0-9893-6c20-e234-f58355d30189 AT jdrake DOT com>
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From:	Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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On Feb 18 11:19, Jeremy Drake via Cygwin wrote:
> On Tue, 18 Feb 2025, Corinna Vinschen via Cygwin wrote:
> 
> > Yep. Are you going to create a patch?
> 
> I'm not seeing a particularly clean way to do this.  Bring back
> available_drives, mask off bits when we see the corresponding drive root
> from dos_drive_mappings, and return those drive letters whose bits are
> still set at the end?

No, I wouldn't do that.

IMHO, the cleanest way to bring this back is to extend
dos_drive_mappings::dos_drive_mappings():

- Prior to the FindFirstVolumeW/FindNextVolumeW loop, prepend another
  loop iterating over GetLogicalDrives() or GetLogicalDriveStringsW().
  In the loop, call QueryDosDevice and add this info to
  dos_drive_mappings, just as in the FindVolume loop.

- In the second loop, simply ignore all mounts mounted to just a drive
  letter (because the first loop already added them all).

Makes sense?

Corinna



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