Date: Fri, 5 Sep 2014 16:24:02 +0200 From: Lionel Cons <lionelcons1972@gmail.com> To: Tim Kientzle <tim@kientzle.com> Cc: Rick Macklem <rmacklem@uoguelph.ca>, Cedric Blancher <cedric.blancher@gmail.com>, Freebsd hackers list <freebsd-hackers@freebsd.org>, Richard Yao <ryao@gentoo.org>, Pedro Giffuni <pfg@freebsd.org>, Jordan Hubbard <jkh@mail.turbofuzz.com> Subject: Re: O_XATTR support in FreeBSD? Message-ID: <CAPJSo4WdzW=KnWnFq964DQZ9cSdxE4Z6mEeXrWNORc5KzAfXUA@mail.gmail.com> In-Reply-To: <CAPJSo4WvVpjUGkcOFcX19x%2BYBDp3eaf_j=UuoT7epoYmUCcWJQ@mail.gmail.com> References: <BC41DB59-5868-432D-9452-00F420934E12@mail.turbofuzz.com> <718836647.19911209.1385302696963.JavaMail.root@uoguelph.ca> <CALXu0UfEQD2y6m5irGQRms=6bY8H854v0Wu9_96JpL4w6wntcg@mail.gmail.com> <706707CA-BD52-4814-BCCE-EB044B062BA6@kientzle.com> <CAPJSo4WvVpjUGkcOFcX19x%2BYBDp3eaf_j=UuoT7epoYmUCcWJQ@mail.gmail.com>
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On 1 December 2013 23:05, Lionel Cons <lionelcons1972@gmail.com> wrote: > On 27 November 2013 05:52, Tim Kientzle <tim@kientzle.com> wrote: >> >> On Nov 26, 2013, at 1:51 AM, Cedric Blancher <cedric.blancher@gmail.com> wrote: >> >>> 5. Support for tar and pax is already there. Its described in >>> Solaris's fsattr man page, they use a extended header with filename >>> /dev/null (to prevent older tar versions from tripping over the new >>> headers) and then have a named attribute header which describes the >>> attributes names and flags. >> >> There are quite a few alternative approaches for storing >> extended attributes in tar and pax files. > > But this discussion is *not* about extended attributes, this > discussion is about Alternate Data Streams. Unfortunately the O_XATTR > discussion somehow started to cover the Linux "extended attribute > system", which is utterly useless in the intended use cases (as said, > no access through normal POSIX read(), write(), mmap(), no unlimited > size, no sparse data support (aka SEEK_HOLE, SEEK_DATA) etc etc). > > Lionel What is the status of O_XATTR (alias alternate data stream support) in FreeBSD? We run more and more into the trouble that these kind of streams are in use but cannot be accessed or processed on FreeBSD. Lionel
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