:sig
String process_start_directory()

:params
return value : worker process start directory

:see
>sys
>cwd_get
>cwd_set

:content
Returns the directory captured when the native process started. It remains stable even if `cwd_set()` changes the current working directory.

:example
print(process_start_directory() != "" ? "have a start directory" : "none", "\n");