[Emacs-bug-tracker] bug#7483: closed (Tail claims bad file descriptor when following)

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Your message dated Sat, 23 Jul 2011 00:21:35 +0200
with message-id <address@hidden>
and subject line Re: bug#7483: Tail claims bad file descriptor when following
has caused the GNU bug report #7483,
regarding Tail claims bad file descriptor when following
to be marked as done.

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7483: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7483
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--- Begin Message --- Subject: Tail claims bad file descriptor when following Date: Fri, 26 Nov 2010 10:44:28 +0200 Hi there,

I use tail 5.3.0 in Windows 7.  It works fine unless I try to follow a file.

Here is my --version output:

C:\>tail --version

tail (GNU coreutils) 5.3.0

Written by Paul Rubin, David MacKenzie, Ian Lance Taylor, and Jim Meyering.

Copyright (C) 2005 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

The following works as expected with no error messages.

tail \\ssb-batman\logs\batman\build.log

However, if I try to follow, it gives output as follows.

C:\>tail -f \\ssb-batman\logs\batman\build.log

[INFO] Unpacking C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb\postgen\target\postgen-izpack.zip to

  C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb_installer\target\staging

   with includes null and excludes:null

[INFO] Unpacking C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb\scheduleinjector\target\scheduleinjector-izpack.zip to

  C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb_installer\target\staging

   with includes null and excludes:null

[INFO] Unpacking C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb\services\target\services-izpack.zip to

  C:\p4ws\depot_cfg\ssb\trunk\postilion\ssb_installer\target\staging

   with includes null and excludes:null

tail: \\ssb-batman\logs\batman\build.log: Bad file descriptor

tail: no files remaining

Why is tail suddenly claiming that the file descriptor is bad, when clearly it works just fine?

So I tried some different things to see if I could get it to work.

I tried 

tail --follow=\\ssb-batman\logs\batman\build.log

but that just gives an even stranger error:

tail: invalid argument `\\\\ssb-batman\\logs\\batman\\build.log' for `--follow'

Valid arguments are:

  - `descriptor'

  - `name'

Try `tail --help' for more information.

I thought at first that maybe tail does not like the UNC path, but that is not the case - it does exactly the same when I use a local file.

If I add --retry to the mix, I get the following very interesting reaction:  It prints out the last few lines, throws out the same error as before, then prints out the entire file!  This is what it looks like:

C:\>tail -f "\\ssb-batman\logs\batman\build.log" --retry

tail: warning: --retry is useful only when following by name

[INFO] CfgSystemInfoExt ...................................... SUCCESS [4.328s]

[INFO] SSB Installer ......................................... SUCCESS [1:28.422s]

[INFO] ------------------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD SUCCESSFUL

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 22 minutes 54 seconds

[INFO] Finished at: Fri Nov 26 10:11:17 GMT+02:00 2010

[INFO] Final Memory: 66M/1016M

[INFO] ------------------------------------------------------------------------

tail: \\ssb-batman\logs\batman\build.log: Bad file descriptor

tail: `\\ssb-batman\logs\batman\build.log' has become accessible

[INFO] Scanning for projects...

[INFO] Reactor build order:

[INFO]   Postilion Parent POM

<snip snip...>

In the interests of brevity I cut out the rest of my 250KB log file :-)

Regards,

Johan

--
Johan Pretorius

Cell: 0829268327

address@hidden

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#7483: Tail claims bad file descriptor when following
>
>
>
>
> Date: 
>
> Sat, 23 Jul 2011 00:21:35 +0200
>
>
>
>
> tags 7483 + notabug
> close 7483
> thanks
>
> Paul Eggert wrote:
> > On 11/26/2010 12:44 AM, Johan Pretorius wrote:
> >> I use tail 5.3.0 in Windows 7.
> >
> > Hmm, that's rather old.  I suggest upgrading to a more-recent
> > version before investigating further.  The current version is 8.7.
> >
> > Also, you might try reporting the bug to whoever built it on Windows
> > rather than to bug-coreutils, as it could well be a property
> > of the Windows port rather than a bug in coreutils itself.
>
> Thanks for the report.
> I'm closing this as "not a bug".
> If you find evidence of a bug using the latest,
> you might want to report it to whomever wrote packaged
> coreutils for windows 7.
>
>
> --- End Message ---