[wpkg-users] WPKG client upgrade

[Brian May]

Tomasz Chmielewski wrote:
> I think killing WPKGSrv.exe will also kill its child processes:
> - cscript ...\wpkg.js
>     \- any other child of cscript

I am not convinced of this. That doesn't mean it won't kill the child 
processes, but unless I see proof...

When I ran it on my system, I think it only killed the service, but I 
wasn't really looking out for this either.

> So I'm afraid that if we don't use "start" to start the script in 
> background, taskkill would also kill our batch script, and prevent WPKG 
> Client from upgrading?

That is bad, there is no guarantees when you have two processes what 
order they will run in. So the taskkill could still kill the batch 
script even if it is a second process.

Assuming you are right and killing the parent process will automatically 
kill the child process that is. Under Unix, the child process would 
continue living unless the parent caught the signal and killed its 
child. I don't know about Windows.

> to make sure WPKG doesn't continue while it's killed...

This who idea of killing wpkg makes me very nervous unless it only kills 
the service and not the wpkg.js script. If you kill the wpkg.js service, 
then presumably you prevent it from writing its current state to disk.

Brian May