Hi Jim, Jim Meyering wrote on 12/22/2011 11:01 AM:
Sven Breuner wrote:can you please add the FhGFS remote file system magic "0x19830326" to the inotify blacklist of the src/tail.c:fremote function.I've attached the expected patch below.
thanks for the patch!(I had problems finding out how the mechanism works, because I was searching for something like a "#define ...MAGIC <number>", which is why I didn't submit a patch in the first place. Now I see how it works.)
Currently, the inotify mechanism is assumed to be working for all unknown file systems, which probably causes trouble for a lot of the different network file systems out there.We have a mechanism in place already to ensure that all file system types listed in /usr/include/linux/magic.h are known to stat -f. I see that FhGFS is not listed there. If it had been listed a few months ago, coreutils-8.14 would now support it. In your situation (a new remote FS for which GNU tail does not yet know its status as a remote FS), there are two ways to work around the problem (that inotify failing makes tail -f fail): - use the deliberately undocumented tail option, ---disable-inotify - add an argument of "-", telling tail -f to read stdin, which never works with inotify, so tail reverts to polling here, too.
Indeed, we are recommending an alias tail='tail ---disable-inotify' as a temporary solution to our users.
From 896529709230021ba3d2b0000b28a6c4af13970a Mon Sep 17 00:00:00 2001 From: Jim Meyering<[email protected]> Date: Thu, 22 Dec 2011 09:26:31 +0100 Subject: [PATCH] tail,stat: add support for FhGFS [...]
Thanks and best regards, Sven
<<attachment: sven_breuner.vcf>>
