GNU bug report logs - #16539
df command, possible bug?

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Message #37 received at 16539 <at> debbugs.gnu.org (full text, mbox):

From: Bernhard Voelker <mail <at> bernhard-voelker.de>
To: Pádraig Brady <P <at> draigBrady.com>
Cc: 16539 <at> debbugs.gnu.org, crubel <at> compro.net
Subject: Re: bug#16539: More details on df command output for you
Date: Tue, 28 Jan 2014 12:13:00 +0100

On 01/27/2014 11:47 PM, Bernhard Voelker wrote:
> On 01/27/2014 02:06 AM, Pádraig Brady wrote:
>> wrt c) and annoying warnings, I also notice `df -a` on a default Fedora 20 install here,
>> giving multiple duplicate warnings like:
>>   df: ‘net:[4026532416]’: No such file or directory
>>   df: ‘net:[4026532416]’: No such file or directory
>> That's due to:
>>   $ grep net: /proc/mounts
>>   proc net:[4026532416] proc rw,nosuid,nodev,noexec,relatime 0 0
>>   proc net:[4026532416] proc rw,nosuid,nodev,noexec,relatime 0 0
>> Which is due to support for namespaces.
> 
> Ugh ... and that's a third problm class for df. ;-(
> 
>> Seems like we should not try to lookup non absolute mount points?
> 
> yes, that's probably our best chance.

Thinking further, this is mandatory:

  $ touch 'net:[4026532416]'

This would make the stat() in df succeed and lead to wrong output.

Have a nice day,
Berny

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