GNU bug report logs - #41935
tail: unrecognized file system type 0x786f4256

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Message #11 received at 41935 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: Pausch Manfred <Manfred.Pausch <at> tgw-group.com>, 41935 <at> debbugs.gnu.org
Subject: Re: bug#41935: tail: unrecognized file system type 0x786f4256
Date: Sat, 20 Jun 2020 16:15:07 +0200

[Message part 1 (text/plain, inline)]

On 2020-06-18 17:57, Pausch Manfred wrote:
> Hello
> 
> When I tail a logfile that’s located on a VirtualBox guest shared folder than I get this message:
> 
> tail: unrecognized file system type 0x786f4256 for ‘oracle_12102_PSU190716-20200618_174315.log’. please report this to bug-coreutils <at> gnu.org. reverting to polling
> 
> My setup:
> VirtualBox Guest: Oracle Linux 7.x
> VirtualBox Host: Windows 10
> 
> A directory on the host is mapped into the guest via VirtualBox shared folder and mounted in the guest.
> The process that writes to the logfile runs inside the guest. And tail that follows the logfile also runs inside the guest.

Thanks for the report.
It's unusual that this FS-type slipped through for so long.
The attached fixes it.

An internet search unveils that inotify does not seem to work reliably
for 'vboxsf', and I think that this cannot really reliably work, e.g. if a Windows
host exposes a directory on a CIFS share into a Linux guest VM (which works, I tried).
Therefore, I've marked 'vboxsf' as a 'remote' file system which uses polling.

Have a nice day,
Berny

[0001-stat-tail-add-support-for-the-VBOXSF-file-system.patch (text/x-patch, attachment)]

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