Date: Tue, 26 Aug 2014 16:32:16 -0700 (PDT) From: "Chris H" <bsd-lists@bsdforge.com> To: "Lowell Gilbert" <freebsd-current-local@be-well.ilk.org> Cc: freebsd-current@freebsd.org, Peter Wemm <peter@wemm.org> Subject: Re: did tar(1) loose xz compression support in 11? Message-ID: <6c36b18e9cf5d2dcd7b251bb385babbd.authenticated@ultimatedns.net> In-Reply-To: <44sikjvw37.fsf@be-well.ilk.org> References: <cc981009f9a7332a7aad557c6a2ed216.authenticated@ultimatedns.net> <53FCD7B8.5060300@wemm.org> <dc60c6e467412ae8c8c4ba043039b270.authenticated@ultimatedns.net> <44sikjvw37.fsf@be-well.ilk.org>
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> "Chris H" <bsd-lists@bsdforge.com> writes:
>
>>> On 8/26/14 11:05 AM, Chris H wrote:
>>>> Greetings,
>>>> I'm currently testing 11. My build / install is from about 2 days ago.
>>>> I generally use xz compression, when creating archives. But when I
>>>> attempt the following:
>>>>
>>>> tar -cvJ --options xz:9 -f ./archive-name.tar.xz ./file
>>>>
>>>> it returns the following:
>>>>
>>>> tar: Undefined option: `xz:9'
>>>>
>>>> This has always worked in previous versions. Has the syntax changed,
>>>> and the man(1) pages just haven't caught up?
>>>
>>> I use:
>>> tar -cJ --options xz:compression-level=1
>>> .. on head. Are you using the right syntax?
>> Apparently not. Using your example works as expected.
>> RELENG_8, and RELENG_9 use short-hand;
>> tar -cvJ --options xz:9
>>
>> Why/when the change to long-hand? Seems a shame. Now I
>> get to modify all my scripts, and such. :P Altho I
>> don't suppose it'd be a big deal to back out (revert) the
>> changes made to tar(1). :)
>
> I can't find any changes that would make the syntax change. At least,
> not in quite a long while. Therefore, this change may not be
> intentional. However, I looked at the the manual page from 9.3, and its
> description of the features looks the same as on the latest HEAD, and
> *doesn't* look like leaving out a "key" (in this case,
> "compression-level") is ever compliant.
>
> You might try the latest (or older) libarchive from the ports, and
> compare its behaviour. Also, there are a number (amusingly many, in
> fact) of other ways of specifying these parameters that may be more
> convenient for you, so another look throught the tar(1) manual might
> save you a few minutes.
Thank you, Lowell. For your extremely informative reply.
Curious. The man page I read from my freshly built 11-CURRENT indicates
the following:
xz:compression-level
A decimal integer from 0 to 9 specifying the xz compres-
sion level.
As I have always read that (interpreted it). It meant:
xz:<decimal-number> (0-9)
Which is what I've always used. I haven't grepped ports||src
yet. But if it makes any difference, it came from src -- build/install
world.
I'll do some poking around. But all my other boxes (RELENG_8 && RELENG_9)
use xz:<decimal-number>.
Thanks again, Lowell. For taking the time to respond. Greatly appreciated.
--Chris
>
> Good luck.
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