Runtime.getRuntime().exec() - native process

Question

Hi,
I want to start a native (openFt) program from within my servlet. Therefore, I use Runtime.getRuntime().exec(String [] cmd). This works fine in my local OC4J container: the process is terminated with error code 0 and the native program is executed. The only strange thing here is that the output text isn't in my InputStream but in my ErrorStream.
The real problem arises when I deploy the same Ear on the 9ias server. Here, the process doesn't execute my native command, terminates with error code 128 and leaves no inputStream and no errorStream.
Errorcode 128 means that there are no child processes to wait for. (i call process.waitFor() to obtain the error code). I think this means my process isn't even started.
Anyone familiar with processes in OC4J & 9IAS?
Thanx in advance

Answer 1

I guess your implementation of matchIp() is wrong:
public class ReaderTest {
    public static void main(String[] args) {
        new ReaderTest().testReaderMethod();
    private void testReaderMethod() {
        ByteArrayInputStream dummyStrem = new ByteArrayInputStream(
                ("*******************************************\n"
                        + "*   My shell Application                   *\n"
                        + "\n"
                        + "*******************************************\n"
                        + "\n" + " \n" + "\n" + "HELP: h\n" + "\n"
                        + "COMMAND: c\n" + "\n" + "QUIT:q\n" + "\n"
                        + "135.19.45.18> ").getBytes());
        System.out.println(readUntilIpMatch(dummyStrem));
    private StringBuilder buffer = new StringBuilder();
    protected String readUntilIpMatch(final InputStream in) {
        while (true) {
            try {
                if (in.available() > 0) {
                    buffer.append((char) in.read());
                    Pattern pattern = Pattern
                            .compile("\\d{1,3}(\\.\\d{1,3}){3}(?=\\D)");
                    Matcher matcher = pattern.matcher(buffer);
                    if (matcher.find()) {
                        return matcher.group();
            } catch (final IOException e) {
                throw new RuntimeException(
                        "Failed to read buffer in while looking for prompt!", e);
    } // runs forever if not matching!!!!
bye
TPD