Shell script doesnot execute within java code

Question

Hi
I have the following code
public static void main (String[] args) throws IOException, InterruptedException {
String command1 = "sh -c /home/test.sh";
// create a process for the shell
ProcessBuilder pb = new ProcessBuilder("sh", "-c", command1);
pb.redirectErrorStream(true); // use this to capture messages sent to stderr
Process shell = pb.start();
InputStream shellIn = shell.getInputStream(); // this captures the output from the command
int shellExitStatus = shell.waitFor(); // wait for the shell to finish and get the return code
int c;
while ((c = shellIn.read()) != -1) {System.out.write(c);}
// close the stream
try {shellIn.close();} catch (IOException ignoreMe) {}
}When I run sh -c /home/test.sh from the commandline on my linux box, it works. But when run from within the above java code, it doesnot.Can you please point to what could be missing?
Many Thanks.

Answer 1

Nish_B wrote:
Thanks for the pointer. /home was just an example.
I modified the code to follow the example.
String command1 ="/home/test.sh";
try
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(command1);
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<ERROR>");
while ( (line = br.readLine()) != null)
System.out.println(line);
System.out.println("</ERROR>");
int exitVal = proc.waitFor();
System.out.println("Process exitValue: " + exitVal);
} catch (Throwable t)
t.printStackTrace();
You really really do need to read the traps article.
>
Is there a way to run as a background process? Use a thread.
Currently when I run the above, the script runs and holds the input, I tried passing "&" to the command1 string as well as concatenating it to the exec arg but seems like the test.sh script then fails since it takes that as a parameter.Read the traps article.
So can I run the above script via the java code and let it run as a background process?Read the traps article.