tring list</span></span> <span>&#45;&gt;</span> <a href="index.html#type-action">action</a> <span>&#45;&gt;</span> string</code></dt><dd><p>Given an command to be executed, creates a process to execute this command, and waits for its execution. Depending on the action passed, either stdout or stderr is returned, with the other being streamed to the console. If the commands fails to execute, prints an error message and exits.</p></dd></dl><dl><dt class="spec value" id="val-print_error_and_exit"><a href="#val