GNU bug report logs - #12301
tail -F & ZFS

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Jim Meyering <jim <at> meyering.net>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#12301: closed (tail -F & ZFS)
Date: Wed, 29 Aug 2012 16:32:02 +0000

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Your message dated Wed, 29 Aug 2012 18:30:39 +0200
with message-id <87mx1d4q4w.fsf <at> rho.meyering.net>
and subject line Re: bug#12301: tail -F & ZFS
has caused the debbugs.gnu.org bug report #12301,
regarding tail -F & ZFS
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Raimonds Miltins <raimonds <at> pro-9.com>
To: <bug-coreutils <at> gnu.org>
Subject: tail -F & ZFS
Date: Wed, 29 Aug 2012 08:00:29 +0300

Hello,

I'm using Gentoo linux on ZFS and see following when opened file with 
tail -F (or -f):
tail: unrecognized file system type 0x2fc12fc1 for ‘/var/log/messages’. 
please report this to bug-coreutils <at> gnu.org. reverting to polling

Distro: Gentoo
Kernel: 3.2.22
Coreutils: 8.16


-- 
Raimonds Miltiņš
SIA "PRO-9"
phone: +371 26101996
gsm:   +371 29427647

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From: Jim Meyering <jim <at> meyering.net>
To: Pádraig Brady <P <at> draigBrady.com>
Cc: Erik Auerswald <auerswal <at> unix-ag.uni-kl.de>,
	Bernhard Voelker <mail <at> bernhard-voelker.de>, 12301-done <at> debbugs.gnu.org
Subject: Re: bug#12301: tail -F & ZFS
Date: Wed, 29 Aug 2012 18:30:39 +0200

Pádraig Brady wrote:
...
>> Hmm... fsid=0x4010002.
>> That is definitely not the same number as what is now recorded in
>> stat.c, so this deserves more investigation:
>>
>>     case S_MAGIC_ZFS: /* 0x2FC12FC1 local */
>>       return "zfs";
>>
>> This also shows there is room for improvement.
>> (should print the hexadecimal FSID):
>>
>>     sol10$ ./stat --fo=%t -f /
>>     ?
>>
>> This latter might deserve its own bug, but for now,
>> I've simply reopened the original ZFS-related bug.
>
> I don't think there is an issue here.
>
> fsid is a per file system rather than per file system type.
> So '?' is correct on Solaris as it doesn't expose the file
> system type ID (it doesn't have statfs).
>
> Also tail will default to the more portable polling
> method when f_type is not available.

Oh, good.  Then this really is "done".  Marking as such.
Thanks!

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