Update: Organize error status handling and address return codes.

Update: Organize error status handling and address return codes.

Improve some of the status handling that I noticed.

Several functions are return code 0 even on status errors.
Only when the execute is performed does the return code get set to something else.
Make sure this behavior is consistent.

There `fake_execute()` does not need to have the error message printed after calling.
That function already prints the error messages as needed.