def _async_start(self):
settings = self.settings
portage_bin_path = settings["PORTAGE_BIN_PATH"]
misc_sh_binary = os.path.join(
portage_bin_path, os.path.basename(portage.const.MISC_SH_BINARY))
self.args = [portage._shell_quote(misc_sh_binary)] + self.commands
if self.logfile is None and \
self.settings.get("PORTAGE_BACKGROUND") != "subprocess":
self.logfile = settings.get("PORTAGE_LOG_FILE")
yield AbstractEbuildProcess._async_start(self)
