Re: [Qemu-discuss] How to send a message from guest machine to host

[Jakob Bohm]

On 11/11/2015 12:12, Jimmy Situ wrote:
> Dear All,
>
> I looking for a method to send a message from my guest machine to the 
> host side when my program on guest machine is finished.
> I have a monitor on the QEMU QMP side, it is possible to send a 
> message by using QMP on the guest machine?
>
> Or there is a better way?
>
> Thanks
>
> Jimmy
The common methods from easiest to most complicated:

1. If you want to shut down the virtual machine at that
  point anyway, just do so, when the shutdown tells the
  VM to power off, qemu will exit and/or signal QMP.

2. Have your program create a file on a shared file
  location, then your code on the guest (or another host)
  can detect its appearance and proceed.

3. Have your program send a "network" message (such as
  sending a packet to a port on the host) which will
  signal your code on the host (or another guest).



Enjoy

Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
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