On Apr 11, 2010, at 18:21, kernalist wrote:
Hi, I am developing a Linux program which runs inside VirtualBox
(i.e. the guest OS is Linux). The program needs to know the moment
when a VM has been restored. Is there a way for a program to find
this out?
I looked through some of the code, and saw some events which
presumably are sent to a VM. However, how can I catch these events
in my program inside a VM, and which events am I exactly interested
in?
Currently there is no official way of determining this. Hmm... One
idea which might work though is watching /VirtualBox/HostInfo/VBoxVer
for changes. I'm not entirely sure if waiting on it will work as that
variable + restore might be a bit of an edge case at the moment. But
if it works, the following command should return after a restore:
VBoxControl wait /VirtualBox/HostInfo/VBoxVer
If it doesn't try poll for timestamp changes using:
while true; do VBoxControl get /VirtualBox/HostInfo/VBoxVer -verbose;
sleep 2; done
We have plans to add a dedicated guest property for signaling restore
events in one of the next releases. When we do that we will make sure
waiting on it will work 100% upon restore.
--
Kind regards / Mit freundlichen Gruessen / Vennlig hilsen,
Knut
--
Sun Microsystems GmbH Knut St. Osmundsen
Werkstrasse 24 Senior Staff Engineer, VirtualBox
71384 Weinstadt, Germany mailto:[email protected]
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