CEF Forum

I want to add new commandline switches or modify few command line switches in main process.
I tried using "OnBeforeCommandLineProcessing" and process_type is supposed to be empty for main process. But I am not able to find a log with "process_type" empty.. I get few logs for other sub-processes.
To update main process command line flags we need to use "OnBeforeCommandLineProcessing" this function right? or is there any other way ?
If we try updating sub-process command line switches in "OnBeforeCommandLineProcessing", then it crashes.

I want to add new commandline switches or modify few command line switches in few sub processes.
I tried adding log in "OnBeforeChildProcessLaunch" but it does not get invoked. I am returning "CefBrowserProcessHandler" from "GetBrowserProcessHandler" function. Is there anything I am missing ?
Also I had few more doubts related to "OnBeforeChildProcessLaunch" -
1) how to identify process_type in OnBeforeChildProcessLaunch ?
2) This function will be called for gpu-process and renderer only? not for any other sub-process ?

Please let me know if there is any better way to achieve same thing.

OnBeforeCommandLineProcessing is the correct method. Make sure to pass your CefApp instance to both CefExecuteProcess and CefInitialize. Command-line flags should usually only be set on the main process. Which flags are you trying to set?

1) OnBeforeCommandLineProcessing is called only for sub-processes and I do not see log with "process_type" empty so I guess its not called for main process. I have passed instance of cefApp to both CefExecuteProcess and CefInitialize. Is there any other reson why OnBeforeCommandLineProcessing is not called for main process ?

2) There are few flags attached to renderer sub-process. I wanted to know if those flags are copied from main process or they are dynamically attached to the renderer sub-process.
I wanted to remove all the command line flags from renderer sub-process and still have those switches turned on programatically, is there any way to achieve this ? We can add cefsettings in main process so can we do something similar in sub-process ?

OnBeforeCommandLineProcessing is called only for sub-processes

That is incorrect.

I wanted to remove all the command line flags from renderer sub-process and still have those switches turned on programatically, is there any way to achieve this ?

OnBeforeChildProcessLaunch can be used to modify the flags passed to sub-processes but usage as you describe is not recommended. Some command-line flags are required to properly launch sub-processes.

1) Who is responsible for calling sub-process executable that is passed in CefSettings "browser_subprocess_path" ?
2) How does main process flags are passed to sub-processes? Can we stop inheriting flags from main process to sub-processes ?