[Libvir] [PATCH] add a ttyconsole command

[Richard W.M. Jones]

Daniel Veillard wrote:
>  It was pointed out that we have a vncdisplay command but none for
> extracting the TTY console device:
> 
>   https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=239687
> 
> the trivial associated patch adds it as well as the doc in the man page

I wonder if it should print some error message if the <console> node 
doesn't exist?  I tried your patch on a FV domain, before remembering 
that FV domains don't have consoles, and it prints an empty line (but 
the return code is 1, which is good):

$ src/.libs/virsh ttyconsole debian32fv

$ echo $?
1

Rich.

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