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Date: Tue, 8 Jan 2019 12:29:05 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Cc: Brian DOT Inglis AT systematicsw DOT ab DOT ca
Subject: Re: [ANNOUNCEMENT] attr 2.4.48-2
Message-ID: <20190108112905.GG593@calimero.vinschen.de>
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References: <announce DOT 20181220110408 DOT 24226-1-corinna-cygwin AT cygwin DOT com> <792facca-bc23-d5c0-76af-336a95e455c1 AT SystematicSw DOT ab DOT ca> <20181220222241 DOT GA3310 AT calimero DOT vinschen DOT de>
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On Dec 20 23:22, Corinna Vinschen wrote:
> On Dec 20 09:03, Brian Inglis wrote:
> > On 2018-12-20 03:04, Corinna Vinschen wrote:
> > > The following packages have been uploaded to the Cygwin distribution:
> > >=20
> > > * attr-2.4.48-2
> > > * libattr-devel-2.4.48-2
> > > * libattr1-2.4.48-2
> >=20
> > Does this release support listing Windows Alternate Data Streams, as th=
e Linux
> > release does with Tuxera NTFS-3G?
>=20
> libattr only supports reading and writing EAs, it has no capabilities to
> read or write ADS.  Ntfs-3g supports the streams_interface=3Dwindows
> option which allows to read ADS.  This also adds the ntfs.streams.list
> EA to a file with named ADS.  So attr/getfattr can only inspect the
> ntfs.streams.list EA because the NTFS-3G driver creates them on the fly
> when inspecting the file EAs.
>=20
> tl;dr: No, sorry.  This could only work if Cygwin fakes the
> ntfs.streams.list EA per file just like the NTFS-3G driver.
>=20
> Patches welcome.  Looks like a nice little project if you want to get
> your hands dirty.  The functions to handle EAs are pretty
> self-sufficiently implemented in ntea.cc.  A little loop about
> NtQueryInformationFile(FileStreamInformation) should do it.

Would that be something you'd like to work on, Brian?


Corinna



--=20
Corinna Vinschen
Cygwin Maintainer

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