I'm trying to retrofit an existing NPAPI plugin to use Google's native message passing technology. Since it's an existing exe, we already have some console behavior programmed in so that users can call our program from the terminal. Is there any way for us to detect, in a C# application, that the exe has been launched by Google Chrome for message passing? If we could do that, we could launch the message passing loop if we're called from Chrome but resume normal behavior if called from Powershell/cmd.
I've tried inspecting the command line arguments passed to the program when launched by Chrome, but there are none. Having a configurable option there would solve this for us, but as far as I can tell it's not possible. I haven't yet had a chance to inspect the current working directory in case it could also be used as an identifier.
The API doesn't support passing command line arguments, but your host process should be able to inspect its own parent process to determine if it was launched by Chrome or something else.