Running an external program under Linux

[Nepomuk]

Hi!
I'm trying to run an external Program with

Process p = Runtime.getRuntime().exec("/bin/sh -c \"/bin/gzip -c /home/user/workspace/TarGz/pics.tar > pics.tar.gz\"");
CleanStream cleanError = new CleanStream(p.getErrorStream(), "ERROR");
CleanStream cleanOutput = new CleanStream(p.getInputStream(), "OUTPUT");
clearError.start();
clearOutput.start();
p.waitFor();
 

under Linux.
Here's the CleanStream.jav a:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
 
public class ClearStream extends Thread {
    InputStream is;
    String type = null;
    boolean typeSet = false;
 
    ClearStream(InputStream is)//, String type)
    {
        this.is = is;
        //this.type = type;
    }
    ClearStream(InputStream is, String type)
    {
        this.is = is;
        this.type = type;
        typeSet = true;
    }
 
    public void run()
    {
        try
        {
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String line=null;
            while ( (line = br.readLine()) != null)
            {
                System.out.print("");
                if(typeSet) System.out.println(type + "> " + line);
            }
        }
        catch (IOException ioe)
        {
            ioe.printStackTrace();  
        }
    }
}
 

The command works fine, when used within bash, but from Java I get the error:

ERROR> -c: 1: Syntax error: Unterminated quoted string
 

I checked the Runtime API and found, that exec(String command) has the token parsed with a StringTokenizer , which would explain, that the last quotation mark isn't found.

I tried packing the String into an array, to avoid this, by using exec(String[] cmdarray).
It looks like this then:

String[] use = {"/bin/sh -c \"/bin/gzip -c /home/user/workspace/TarGz/pics.tar > pics.tar.gz\""};
Process p = Runtime.getRuntime().exec(use);
// same as after here
 

The error here is even worse:

java.io.IOException: Cannot run program "/bin/sh -c "/bin/gzip -c /home/user/workspace/TarGz/pics.tar > pics.tar.gz"": errir=2, No such file or directory
   at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
   at java.lang.Runtime.exec(Runtime.java:593)
   at java.lang.Runtime.exec(Runtime.java:466)
   at TarSomething.main(TarSomething.java:18)
Caused by: java.io.IOException: java.io.IOException: error=2, No such file or directory
   at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
   at java.lang.ProcessImpl.start(ProcessImpl.java:65)
   at java.lang.ProcessBuilder.start(ProcessBuilder.java:452)
   ... 3 more
 

(Line 18 in TarSomething is Process p = Runtime.getRunt ime().exec(use) ;)

I've been trying to solve this problem for a while, but without success.

Can anyone help me?

Greetings,
Nepomuk

[Nepomuk]

OK, Problem solved.
I used this:

String[] use = {"/bin/sh", "-c", "/bin/gzip -c /home/user/workspace/TarGz/pics.tar > pics.tar.gz"};
// Same from this point
 

Greetings,
Nepomuk