bug#23143: tail: unrecognized file system type 0x7c7c6673

[Bernhard Voelker]

On 03/31/2016 05:41 PM, Pádraig Brady wrote:

I'll push the attached later.


LGTM. Thanks!

Have a nice day,
Berny

bug#23143: tail: unrecognized file system type 0x7c7c6673

[Pádraig Brady]

On 30/03/16 21:15, Mikhail Emelchenkov wrote:

Hello Pádraig,


Heh 0x7C7C6673 is ||fs in ASCII. I like it :)


Me too :)


Could you install inotify-tools and use inotifywait to see if inotify is 
supported on prl_fs?
That will let us tag it appropriately.


I did it. Mixed picture:
1. Run `inotifywait -e modify /vagrant/out/1.txt` and run `echo 123 >> 
/vagrant/out/1.txt` both from inside VM (in different shell sessions).
Setting up watches.
Watches established.
/vagrant/out/1.txt MODIFY
2. Run `inotifywait -e modify /vagrant/out/1.txt` from inside VM and run `echo 123 
>> /vagrant/out/1.txt` from outside VM.
Setting up watches.
Watches established.
(just waiting, nothing fired)

I use native Parallels Tools installed inside VM.

FS mounted as (it is mounted automatically by Vagrant and Parallels):
vagrant on /vagrant type prl_fs (rw,uid=1000,gid=1000)


Excellent.
I'll push the attached later.

thanks,
Pádraig

>From d33f1fbd671c58df453ce24446174d8c5ce4a355 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= 
Date: Thu, 31 Mar 2016 16:34:28 +0100
Subject: [PATCH] stat: report type for "prl_fs" file systems

* src/stat.c (human_fstype): Identify the parallels file system.
Also tag as remote so that tail(1) doesn't use inotify, which
fails to detect changes made outside a VM.
Fixes http://bugs.gnu.org/23143
---
 NEWS   | 2 ++
 src/stat.c | 6 --
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index d3597d0..dd3ee9c 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,8 @@ GNU coreutils NEWS-*- outline -*-
stat now outputs nanosecond information for time stamps even if
they are out of localtime range.
 
+   stat -f --format=%T now reports "prl_fs" for a parallels file system.
+
sort, tail, and uniq now support traditional usage like 'sort +2'
and 'tail +10' on systems conforming to POSIX 1003.1-2008 and later.
The 2008 edition of POSIX dropped the requirement that arguments
diff --git a/src/stat.c b/src/stat.c
index 1742ff1..4d7ead3 100644
--- a/src/stat.c
+++ b/src/stat.c
@@ -403,9 +403,11 @@ human_fstype (STRUCT_STATVFS const *statfsbuf)
   return "panfs";
 case S_MAGIC_PIPEFS: /* 0x50495045 remote */
   /* FIXME: change syntax or add an optional attribute like "inotify:no".
- The above is labeled as "remote" so that tail always uses polling,
- but this isn't really a remote file system type.  */
+ pipefs and prlfs are labeled as "remote" so that tail always polls,
+ but these aren't really remote file system types.  */
   return "pipefs";
+case S_MAGIC_PRL_FS: /* 0x7C7C6673 remote */
+  return "prl_fs";
 case S_MAGIC_PROC: /* 0x9FA0 local */
   return "proc";
 case S_MAGIC_PSTOREFS: /* 0x6165676C local */
-- 
2.5.5

bug#23143: tail: unrecognized file system type 0x7c7c6673

[Mikhail Emelchenkov]

Hello Pádraig,

> Heh 0x7C7C6673 is ||fs in ASCII. I like it :)

Me too :)

> Could you install inotify-tools and use inotifywait to see if inotify is 
> supported on prl_fs?
> That will let us tag it appropriately.

I did it. Mixed picture:
1. Run `inotifywait -e modify /vagrant/out/1.txt` and run `echo 123 >> 
/vagrant/out/1.txt` both from inside VM (in different shell sessions).
Setting up watches.
Watches established.
/vagrant/out/1.txt MODIFY
2. Run `inotifywait -e modify /vagrant/out/1.txt` from inside VM and run `echo 
123 >> /vagrant/out/1.txt` from outside VM.
Setting up watches.
Watches established.
(just waiting, nothing fired)

I use native Parallels Tools installed inside VM.

FS mounted as (it is mounted automatically by Vagrant and Parallels):
vagrant on /vagrant type prl_fs (rw,uid=1000,gid=1000)

Mikhail Emelchenkov
Research & development
www.Emelchenkov.pro 

bug#23143: tail: unrecognized file system type 0x7c7c6673

[Pádraig Brady]

On 29/03/16 12:40, Mikhail Emelchenkov wrote:

Hello,

tail ask me to send bugreport to your email address, and I am doing it.

When using Parallels 11 OS X with Vagrant and Ubuntu guest, got this error. 
`tails` utility can't detect `prl_fs` filesystem.

tail: unrecognized file system type 0x7c7c6673 for 'file.log'. please report 
this to bug-coreutils@gnu.org. reverting to polling

# lsb_release -rd
Description:Ubuntu 14.04.3 LTS
Release:14.04

coreutils 8.21-1ubuntu5.4

Also, I reported this bug to Ubuntu: 
https://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/1563283


Heh 0x7C7C6673 is ||fs in ASCII. I like it :)
Could you install inotify-tools and use inotifywait to see if inotify is 
supported on prl_fs?
That will let us tag it appropriately.

thanks,
Pádraig.

bug#23143: tail: unrecognized file system type 0x7c7c6673

[Mikhail Emelchenkov]

Hello,

tail ask me to send bugreport to your email address, and I am doing it.

When using Parallels 11 OS X with Vagrant and Ubuntu guest, got this error. 
`tails` utility can't detect `prl_fs` filesystem.

tail: unrecognized file system type 0x7c7c6673 for 'file.log'. please report 
this to bug-coreutils@gnu.org. reverting to polling

# lsb_release -rd
Description:Ubuntu 14.04.3 LTS
Release:14.04

coreutils 8.21-1ubuntu5.4

Also, I reported this bug to Ubuntu: 
https://bugs.launchpad.net/ubuntu/+source/coreutils/+bug/1563283

Mikhail Emelchenkov
Research & development
www.Emelchenkov.pro , +7 (968) 849-4070