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To: linux-btrfs@vger.kernel.org
From: boris <6401e46d@opayq.com>
Subject: File test operator for subvols; possible bug in 'btrfs show <directory>'
Date: Tue, 25 Nov 2014 02:11:11 +0000 (UTC)
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Hi all,

I was looking for a quick method of testing whether a working directory is a 
subvolume.

Couldn't see an obvious one, so tried 'btrfs show <somesubvol≥'. It printed 
a fail message as expected but returned 0 exit status. Bug?

Can I put in a feature request for a shell file test operator for subvols, 
please (or something of the kind)? http://tldp.org/LDP/abs/html/fto.html . 
The letter v (for volume, both upper and lower case forms; one for subvol, 
other for snapshots) is unused afaict. 

Have I missed the obvious? Or scored a false positive?

TIA.