Implement Exec

[sevensolutions]

Try to implement the exec functionality if it is possible to do that under the AppPool identity.

[sevensolutions]

Ok, after some research it's not that easy to run another app as the AppPool's identity because it's a gMSA or virtual account :/

[sevensolutions]

An idea would be to co-host a separate web app in the same AppPool which acts as a proxy, runs the command and forwards stdio/stderr to the task driver. Similar to "Kudu" in Azure.
Seems like Kudu is open-source: https://github.com/projectkudu/kudu

[sevensolutions]

After a couple of days of trial and error, a PoC for this is now working on branch "feature/exec".
It's currently stealing the auth token from the worker process and then creates the exec process by using some low level NT API calls.