[dm-crypt] How to determine if a LUKS device is opened or closed

Tom Hartman rokstar83 at gmail.com
Fri Aug 19 17:42:41 CEST 2016

Is there a way through either cryptsetup or some other tool to determine if
a luks device is opened or closed? It looks like the status command is only
meant for mapped volumes.

Something like:

            cryptsetup isLuksOpen /dev/sda1

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