Problems with executing program from java

[Micke]

I have problems with this simple program below.
It starts to read and dump wav data to file but stops after 2MB.
The cdda2wav processes are still alive but nothing more is happening.
I have more advanced examples with threads and reading from the process
buffers but the result is the same.
Java version is 1.5 and OS is Linux slackware 10.0.

public class TestRead {
public static void main (String[] args) {
try {
String[] cmd = {"/usr/bin/cdda2wav", "-D", "/dev/cdrom",
"-S", "1", "-t", "1"};
Process process = Runtime.getRunt ime().exec(cmd) ;
process.waitFor ();
System.out.prin tln("Exit Value=" + process.exitVal ue());
}
catch (Exception x) {
x.printStackTra ce();
}
}
}

[Ryan Stewart]

"Micke" <th*********@ho tmail.com> wrote in message
news:xV******** *************@n ewsc.telia.net. ..

I have problems with this simple program below.
It starts to read and dump wav data to file but stops after 2MB.
The cdda2wav processes are still alive but nothing more is happening.
I have more advanced examples with threads and reading from the process
buffers but the result is the same.
Java version is 1.5 and OS is Linux slackware 10.0.

public class TestRead {
public static void main (String[] args) {
try {
String[] cmd = {"/usr/bin/cdda2wav", "-D", "/dev/cdrom", "-S",
"1", "-t", "1"};
Process process = Runtime.getRunt ime().exec(cmd) ;
process.waitFor ();
System.out.prin tln("Exit Value=" + process.exitVal ue());
}
catch (Exception x) {
x.printStackTra ce();
}
}
}

Try calling getInputStream and getErrorStream on your Process and reading
their contents. As specified in the Process documentation, these streams can
have limited buffer sizes, and when those buffers fill, the process may
block or deadlock.

[Micke]

Ryan Stewart wrote:

"Micke" <th*********@ho tmail.com> wrote in message
news:xV******** *************@n ewsc.telia.net. ..

I have problems with this simple program below.
It starts to read and dump wav data to file but stops after 2MB.
The cdda2wav processes are still alive but nothing more is happening.
I have more advanced examples with threads and reading from the process
buffers but the result is the same.
Java version is 1.5 and OS is Linux slackware 10.0.

public class TestRead {
public static void main (String[] args) {
try {
String[] cmd = {"/usr/bin/cdda2wav", "-D", "/dev/cdrom", "-S",
"1", "-t", "1"};
Process process = Runtime.getRunt ime().exec(cmd) ;
process.waitFor ();
System.out.prin tln("Exit Value=" + process.exitVal ue());
}
catch (Exception x) {
x.printStackTra ce();
}
}
}

Try calling getInputStream and getErrorStream on your Process and reading
their contents. As specified in the Process documentation, these streams can
have limited buffer sizes, and when those buffers fill, the process may
block or deadlock.

I've got it working now.
Before posting the message here I did what you said, kind of...
But it didn't work. Your answer made me think a little bit more.
I think the reason why it failed was that the inpuStream and errorStream blocked each other.
So I put them in two threads and that did it!