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Endpoint Virtualization Community Blog

How to Launch an Application or Run a Script when a Layer's State Changes

Created: 17 Jan 2006 • Updated: 29 Jul 2010 • 16 comments
Jeremy_Hurren's picture
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SVS CodeMaster Jeremy Hurren just threw another gem over the wall. If you want an SVS action (activate, deactivate, delete ...) to trigger an application, or send a message, or play a sound, here's the recipe.

Have you ever needed to run an external process when a layer gets activated, or deactivated, or deleted? You might, for example, have a third-party inventory system and want to re-evaluate the computer's inventory when layers activate and deactivate. (Send us your examples*).

Or maybe, like me, you just want to play a sound when layers activate. The following example plays the ding.wav file when a layer is activated and the chord.wav file when a layer is deactivated.

HKEY_LOCAL_MACHINE\SYSTEM\Altiris\FSL
OnPostActivate (MULTI_SZ) = "PlaySound.exe "C:\Windows\Media\ding.wav""
OnPostDeactivate (MULTI_SZ) = "PlaySound.exe "C:\Windows\Media\chord.wav""

In addition to a global setting like the one above, you can also change settings for individual layers by using the following registry key.

HKEY_LOCAL_MACHINE\SYSTEM\Altiris\FSL\1 (replace 1 with the layer number)

There are a number of events that can be captured in this fashion. Here is a complete list of the possible registry values, all of which are REG_MULTI_SZ types:

  • OnPreActivate
  • OnPostActivate
  • OnPreDeactivate
  • OnPostDeactivate
  • OnPreImport
  • OnPostImport
  • OnPreExport
  • OnPostExport
  • OnPreReset
  • OnPostReset
  • OnPreDelete
  • OnPostDelete
  • OnPreCreate
  • OnPostCreate
  • OnPreCapture
  • OnPostCapture

* Let us know if you've come up with some cool applications for this tip. Send us your ideas and we'll post them here.

Comments 16 CommentsJump to latest comment

hamletv's picture

Can it be made so that an application layer, when activated/deactivated, activates/deactivates a related data layer?

-Hamlet

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Jeremy_Hurren's picture

Sure it can. You could just create an OnPostActivate and OnPostDeactivate for the application layer. For each, you would enter a command like "svscmd.exe [GUID-of-data-layer] activate" or "svscmd.exe [GUID-of-data-layer] deactivate".

Great Idea!

--LordJeb

Jeremy Hurren, Sr. Principal Software Engineer, Symantec

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Thunder-man's picture

Hi,
I post a Tip for OnPostActivate / OnPostDeactivate to hide a file, when a Layer is activate / deactivate.

See this ...
Altiris support forum

Sorry for my bad English…

Google English…
SVSLoad.com

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toralf's picture

Hi lordjeb,

Thank you for adding this feature. It opens a lot of possibilities.

But I wonder how I could use OnPreCreate or OnPostCreate. A layer only exists after it is created. And I can't add anything to the registry when it doesn't exist yet.

Or are these events only useful as global events? I understood from your main post that the list of events only applies to layers. And that only the de-/activate events can also be used globally. But I guess I misinterpreted it. Could you please confirm? Thanks a lot.

Ciao
toralf

Ciao
toralf

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sizemore's picture

Could this be used to start a service? OR add a service and start it?

Altiris Newb

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Swami's picture

Is it possible to add / have a GUI Please?
You now for old guys like me, remembering the commands are bit tuff. I used to write it in a piece of paper & loose them frequently :(

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Scott Jones's picture

The GUI for creating and editing SVS events is in Wise Package Studio. There is also a free tool here on the Juice.

Scott Jones
Product Manager
Altiris, Inc.
Now Part of Symantec

Scott Jones
Business Critical Engineer, Endpoint Virtualization
Symantec Corporation
www.symantec.com
 

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Swami's picture

Thank You very much for the informations.
Regards,
Swami

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rpfenninger's picture

We use the OnEvent actions (OnPostActivate, OnPostDeactivate and OnPostReset) most of the time to restart the spooler service so that printers from virtual packages work correctly.

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Pascal KOTTE's picture

https://www-secure.symantec.com/connect/downloads/...

Why not running a robot to correct this kind of failed link after migrating the Juice ? :-(

~Pascal @ Kotte.net~ Do you speak French? Et utilisez Altiris: venez nous rejoindre sur le GUASF

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clivant's picture

Hi,

I need to keep track of whether my users are using the virtualized applications that I provisioned to them. Is it possible to detect the virtual applications that are launched by the users, programmatically? 

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Nirmal R's picture

If you are using SWV stand alone, I've seen customer write their own tool to remotely monitor this. If you are using SWV in conjunction with CMS or Streaming, there are various reports you can run. If you need real time usage stats, consider using streaming.

Hope this helps.

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clivant's picture

Hi Nirmal,

Thanks for replying. I am using SWV stand alone, any ideas how the customer wrote their own tool to monitor this? 

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Nirmal R's picture

To my knowledge it was done with a combination of WMI (Windows Management Instrumentation) and svscmd

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Pascal KOTTE's picture

But you need to use a script, a package, or a tools, you need to include in your virtual package:

If the layer not activated, the content not "available", you can address the script with the "meta" variable

%VZ_LAYER_METADIR%

Provide the Meta folder inside the layer, all the same not yet activated:

see excellent Jordan article:

https://www-secure.symantec.com/connect/articles/getting-more-svss-onevent-functionality

I use this to create an Office installation, with the setup running on a empty layer, with all the Office source in the "meta" folder. So on post-import event: stop all layers, running the setup in "update mode" the empty layer, populate with the office installation, using the specific Windows context, to get a true "MSIEXEC" updating specific each current Windows machine, with previous Office existing data, and Windows context, different each machine...

~Pascal @ Kotte.net~ Do you speak French? Et utilisez Altiris: venez nous rejoindre sur le GUASF

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Matias Palomera's picture

How could I do an script that modifies the shortcut of the layer (im using Internet Explorer layers created with the Swvldf tool) to be for x86 or x64 depending of the system it is activated?

Thanks, Matias

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