Runtime.getRuntime().exec problems running with applet

Hi,
I am running the command
Process prc = Runtime.getRuntime().exec("net config workstation");
InputStream in = prc.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(in));
line = br.readLine();
When running from an application(/stand alone program) on Win-NT it runs fine. But when i include the same code in an Applet and try to run.
It doesnt return any thing. I see the DOS-prompt open and close and i can also see the required output generated on the DOS prompt, but the program doesnt return any results(null) in the InputStream.
I even tried to get the ErrorStream incase it is writing some error but it doesnt write anything.
I tried running some other commands like (cmd.exe /c set) which were able to run on both application as well as from the applet.
I have tried giving the "net config workstation" command in all flavors
     String[] cmd = new String[3];
     cmd[0] = "cmd.exe";
     cmd[1] = "/C";
     cmd[2] = "net config workstation";
And
     String[] cmd = new String[3];
     cmd[0] = "net.exe";
     cmd[1] = "config";
     cmd[2] = "workstation";
AND
     String[] cmd = new String[5];
     cmd[0] = "cmd.exe";
     cmd[1] = "/C";
     cmd[2] = "net.exe";
     cmd[3] = "config";
     cmd[4] = "workstation";
AND giing the full path as
C:\winnt\system32\net.exe config workstation
But still it doesnt work.
Can anybody please suggest what is the problem.Its Urgent.....
Well the purpose of this is to get users system properties like the Logon Domain , server name etc.... or else can anybody suggest a better way to obtain this information.....
Your reply will be highly appriciated...
Thanks in Advance......

Thanks for atleast replying.....
Sorry, i forgot to mention.... yes OfCourse, i am using an Signed Applet..... That how i was able to run the "set" command.....
I have made sure it is not sucha simple problem..... the thing is as i have mentioned i know that even "net config workstation" works..... cause i see the output on the DOS prompt,.... but this output is not returned to the Applet in the getInputStream()/getErrorStream().....
Can anybody please suggest a way to get this output..... OR is there some other way to get the machine's domain, server name etc info from the machine....?????
Thanks in Advance...!!

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Read the following.
[http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html?page=1]

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Runtime.getRuntime().exec(...) problems and exit codes

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In addition, those processes that are not properly launched return an exit value of 255. I have searched for its meaning but I have found nothing. Could anybody tell me where can I find a list of the JVM exit codes in order to guess what is happening?
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Thanks a lot

I have been looking for it but it seems it has not any exit code list or any documentation regarding this. Anyway, I think 255 is a JVM error code (the last one, errors are numbered in modulo 256) which means that the error has nothing to do with JVM but with the application execution (flute in my case).
I have added a prompt for the errorStream and I have this message for the 255 exited programs:
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Edited by: dulceangustia on Apr 3, 2008 3:41 AM

Runtime.getRuntime().exec portability problem

Hello everyone!
I've got a problem with running external application (in my case it's pdfLaTeX). The code looks as follows:
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Process p = Runtime.getRuntime().exec(AppConfig.getExeFile() + " " + params); // params is a String object as well.
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// ...On Linux everything works great. System.out.println() outputs the following line:
/opt/texlive/bin/pdflatex -halt-on-error -output-directory /tmp /tmp/tabular.texThe application executes successfully.
However, I can't get my program to run on Windows. In this case, the generated command looks as follows:
"C:\Program Files\LaTeX\MiKTeX 2.7\miktex\bin\pdflatex.exe" -halt-on-error -output-directory C:\DOCUME~1\Roman\USTAWI~1\Temp C:\DOCUME~1\Roman\USTAWI~1\Temp\tabular.texAfter displaying this line, my application freezes. The child process (pdflatex.exe) is frozen as well. Then I kill both processes.
Here's the PdfLaTeX's log file after failure:
{C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX/2.7/pdftex/config/pd
ftex.map}
!pdfTeX error: (file C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX
/2.7/pdftex/config/pdftex.map): fflush() failed
==> Fatal error occurred, no output PDF file produced!and here's how it should look like:
{C:/Documents and Settings/All Users/Dane aplikacji/MiKTeX/2.7/pdftex/config/pd
ftex.map}] (tabular.aux) )
Here is how much of TeX's memory you used:
202 strings out of 95340
2116 string characters out of 1183965
46926 words of memory out of 1500000
3474 multiletter control sequences out of 110000
3640 words of font info for 14 fonts, out of 1200000 for 2000
14 hyphenation exceptions out of 8191
23i,6n,17p,173b,100s stack positions out of 5000i,500n,10000p,200000b,5000s
<C:/Program Files/LaTeX/MiKTeX 2.7/fonts/type1/bluesk
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Output written on tabular.pdf (1 page, 10003 bytes).
PDF statistics:
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0 named destinations out of 1000 (max. 131072)
1 words of extra memory for PDF output out of 10000 (max. 10000000)I suspected that the problem was caused by presence of spaces in command (I've tried several other solutions such as putting parameters into String[] array, escaping, adding double-quotes, putting the command to the batch file), but when I run my the same command from the command line, everything works fine.
I believe that I'm making some kind of a stupid mistake because it doesn't look like it's pdfLaTeX's fault.
Thanks in advance for your hints. Solutions are welcome as well ;-)

Hi,
What is probably happening is that the process is being blocked because you are not reading the output.
This is a common problem with exec.
Read this article:
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
HTH,
Eugenio Alvarez

Need help on changing directories with Runtime.getRuntime().exec() (shell)

I want to create a perfect remote shell with Runtime.getRuntime(). I just can't get it to change directories. I want that if the remote user type "cd.." he changes the directory. At the moment, I can't get anything else than the "user.dir" directory.
Is there anyway to send additionnal commands to cmd.exe after the Runtime.getRuntime().exec(). Because at the moment I'm running these commands:
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Because essentially I want this to be a remote shell.
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computer.
I just managed to be able to do it in one command
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Runtime.getRuntime().exec problems running with applet

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