system ';' STRING ( ';' STRING )?

public String _system(String args[]) throws Exception {
	return system_internal(false, args);
}

public String _system_allow_fail(String args[]) throws Exception {
	String result = "";
	try {
		result = system_internal(true, args);
	}
	catch (Throwable t) {
		/* ignore */
	}
	return result;
}

	/**
 * System command. Execute a command and insert the result.
 *
 * @param args
 * @param help
 * @param patterns
 * @param low
 * @param high
 */
public String system_internal(boolean allowFail, String args[]) throws Exception {
	if (nosystem)
		throw new RuntimeException("Macros in this mode cannot excute system commands");

	verifyCommand(args, "${" + (allowFail ? "system-allow-fail" : "system")
			+ ";<command>[;<in>]}, execute a system command", null, 2, 3);
	String command = args[1];
	String input = null;

	if (args.length > 2) {
		input = args[2];
	}

	if ( File.separatorChar == '\\')
		command = "cmd /c \"" + command + "\"";


	Process process = Runtime.getRuntime().exec(command, null, domain.getBase());
	if (input != null) {
		process.getOutputStream().write(input.getBytes("UTF-8"));
	}
	process.getOutputStream().close();

	String s = IO.collect(process.getInputStream(), "UTF-8");
	int exitValue = process.waitFor();
	if (exitValue != 0)
		return exitValue + "";

	if (exitValue != 0) {
		if (!allowFail) {
			domain.error("System command " + command + " failed with exit code " + exitValue);
		} else {
			domain.warning("System command " + command + " failed with exit code " + exitValue + " (allowed)");

		}
	}

	return s.trim();
}