Run and manage sub processes. This class grants acess to run and manage sub processes with more fine grained control compared to OS.execute(). Returns the data returned by the last [member poll] run. Returns the exit code of the process. Returns the exit code of the running process, or 0. Returns whether a subprocess is running. Reads from the running process's console output if applicable. Pipe data to the running process. Send a signal to the runnign process. Start a subprocess according to the properties. Will return ERR_BUSY if something is already running. If [member blocking] is true, and [member read_output] is also true, the output can be read from [member get_data()] after this method returns. If [member blocking] is false, and [member read_output] is true, the output can be read (usually line-by-line) from [member get_data()] after every [member poll()] calls. Stop the running subprocess. The arguments that will be passed to the executable. Whether to block until the subprocess finishes or not. The executable's path that will be run. Whether to open a console window or not. Windows only. Controls whether to read any output of the subprocess or not. Controls whether to read the standard output of the subprocess or not. Controls whether to read the standard error output of the subprocess or not. Controls whether to use a mutex when reading the output of the subprocess.