Problems with a thread that records dvd on suse linux

Question

PLEASE HELP
I am using SuSE linux, and I record dvd+/- RW with the program growisofs.
By command line on the linux shell, growisofs records normally, but when I try to use the same line cone that I use in the shell in a java thread, it never stops recording, I mean, it records all data, but it apparently does not close the dvd session, for the grenn light on the drive never stops blinking, and I have to stop the proccess manually, because it never releases the dvd drive.
I use the thread in a large program, but for debugging this I have made a simple program, whose error is the same.
the code is:
        String s = "/usr/local/bin/growisofs -speed=1 -M /dev/dvdram  -V MIS27 -A growisofs -P MedImServer " +
           " -p MedImServer -sysid Linux -J -R -l -relaxed-filenames -allow-lowercase -allow-multidot  /windows/C/online";
       Process p;
            try {
                p = Runtime.getRuntime().exec(s);
                p.waitFor();
            catch (IOException ex) {
                JOptionPane.showMessageDialog(null,"erro no runtime");
                System.exit(0);
            catch (InterruptedException ex1) {
                JOptionPane.showMessageDialog(null,"erro no waitfor");
                System.exit(0);
            }with JBuilder 9 debug, I realized that it freezes at the moment of "p.waitFor()".
I thought that it was a problem with the recording software, but it is not: the same command line that I use in the program I have used in the Linux shell and it recorded perfectly. The program does not require any user interaction but the command line I wrote before. The problem with the Java program is that it records all data, but never returns from the process. It's not a problem with the software, for it records perfectly when it's not called within the Java program, so I imagine that it is some funny thing in either the Runtime.getRuntime().exec(...) or the p.wait().
Better yet:
Is there a way to record dvds with a java command instead with an exteranal program?
This would be the heaven...
IF it is possible, do it require some sun package?
Thans
Tiago

Answer 1

Did you mean like this?
        Process p = null;
        String s = null;
        File f;
        try {
            f = new File(pathtmp);
            f.mkdir();
            if(VERBOSE) Log.info(GRAVA_LOG_MARK + "Pasta " + f.getPath() + " criada");
            for (Iterator iter = estudos.iterator(); iter.hasNext(); ) {
                HashMap item = (HashMap) iter.next();
                String id = (String) item.get("id_paciente");
                String dt_hr = (String) item.get("dt_hr_estudo");
                String estudo = id + "." + dt_hr;
                File dir = new File(distriOff.path);
                String[] arquivos = dir.list(new FiltroInicio(estudo));
                for (int i = 0; i < arquivos.length; i++) {
                    File src = new File(distriOff.path + arquivos);
File dest = new File(pathtmp + arquivos[i]);
try {
Util.copy(src, dest);
catch (Throwable ex) {
Log.error(mensagem + " " + ex);
prop.enviaMsg(mensagem + " " + ex);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + ex);
String os = System.getProperty("os.name");
String modo;
if(midia.getEspaco_disponivel_midia() == midia.getTamanho_midia()) {
//primeira gravagco
modo = "-Z";
else {
//gravagco de novas segues
modo = "-M";
String speed = "-speed=1";
String cmd = "/usr/local/bin/growisofs " + speed + " " + modo + " " + dvdDevice + " "
+" -V " + prop.getIdMidiaAtual() + " -A growisofs -P MedImServer "
+"-p MedImServer -sysid " + os + " -J -R -l -relaxed-filenames -allow-lowercase -allow-multidot " + pathtmp;
p = Runtime.getRuntime().exec(cmd);
p.waitFor();
catch (IOException ex){
Log.error(mensagem + " " + ex);
prop.enviaMsg(mensagem + " " + ex);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + ex);
catch (InterruptedException ex) {
Log.error(mensagem + " " + ex);
prop.enviaMsg(mensagem + " " + ex);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + ex);
try
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
// Lj saida padrco do comando
while ( (s = stdInput.readLine()) != null)
Log.info(GRAVA_LOG_MARK + s);
catch (IOException ex)
Log.error(mensagem + " " + ex);
prop.enviaMsg(mensagem + " " + ex);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + ex);
try
BufferedReader stdErr = new BufferedReader(new InputStreamReader(p.getErrorStream()));
// Lj qualquer erro do comando
while ( (s = stdErr.readLine()) != null) {
Log.info("Processo de Gravagco: " + s);
if((s.indexOf("failed") != -1) || (s.indexOf("error") != -1) || (s.indexOf("unable") != -1)) {
Log.error(mensagem + " " + s);
prop.enviaMsg(mensagem + " " + s);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + s);
catch (IOException ex)
Log.error(mensagem + " " + ex);
prop.enviaMsg(mensagem + " " + ex);
throw new ExcecaoDistribuicao(ExcecaoDistribuicao.ERRO, mensagem + " " + ex);
I tried to execute it, and it indeed doesn't freeze, but it doesn't record a thing either...
now it doesn't even wait for the thread, which is VERY weird: it does not record a thing!!! It just passes by the line 'p.waitFor()'...
Any sugestion?
By the way, thanks for helping me...
Tiago