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List:       util-linux-ng
Subject:    Re: when would blkid success but not filesystem type?
From:       Karel Zak <kzak () redhat ! com>
Date:       2015-05-26 9:40:40
Message-ID: 20150526094040.GA11308 () ws ! net ! home
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On Tue, May 26, 2015 at 12:21:36PM +0800, Paul Wise wrote:
> On Thu, 21 May 2015 13:07:35 +0200 Karel Zak wrote:
> 
> > The option '-s' does not affect return code ...  we have information
> > about all (including empty) partitions!
> 
> Ok, I see. Sounds like the proposed patch is appropriate then.
> 
> https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=12;filename=0001-Fix-by-forcing-fs-type-to-not-detected-if-not-named.patch;att=1;bug=784709
>  
> > Note that my recommendation is to use lsblk, for example:
> 
> That has the same issue:
> 
> $ sudo lsblk --noheading --output FSTYPE /dev/sda2 ; echo $?
> 
> 0

 Why do you want rely on return code? It is not error when 
 FS type is undefined/unknown. All you need is to check result.

  FSTYPE=$(lsblk --nodeps --noheading --output FSTYPE /dev/sda2)
  [ -n "$FSTYPE" ] && echo $FSTYPE

> I think for our purposes we would need --nodeps too.

 Yes.

    Karel

-- 
 Karel Zak  <kzak@redhat.com>
 http://karelzak.blogspot.com
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