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Date:   Thu, 6 Jun 2019 19:31:47 -0400
From:   "Theodore Ts'o" <tytso@mit.edu>
To:     Karel Zak <kzak@redhat.com>
Cc:     Harald Dunkel <harald.dunkel@aixigo.com>,
        util-linux@vger.kernel.org
Subject: Re: careful with that umount options, Eugene
Message-ID: <20190606233147.GB23169@mit.edu>
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On Thu, Jun 06, 2019 at 02:59:47PM +0200, Karel Zak wrote:
> On Tue, Jun 04, 2019 at 01:51:58PM +0200, Harald Dunkel wrote:
> > Hi folks
> > 
> > by accident I pasted
> > 
> > 	umount ls -al /mnt/
> > 
> > into bash. My bad. AFAICT /proc was umounted immediately, the
> > rest died slowly. Don't try this at home.
> 
> Fixed ... new version:
> 
>  # umount ls -al /mnt/
>  umount: unexpected arguments
>  Try 'umount --help' for more information.

Hmm...  Should we also prevent a lazy unmount of the root file system?

	       	       	       	 - Ted