Getting output from a C programme

Question

Hi
I am trying to execute a C programme (.o file) on Solaris and get its output .
The C programme is a simple function which returns 0 or more then zero after executing some logic .
I tried to use Runtime.exec() method but was not able to get any out put from the function , where as I did same in a perl script and was able to get the output .
I have even tried to get error stream , input stream but I always get -1 as a return value .
Following is my program
Runtime rt = Runtime.getRuntime();
String[] arg =new String[]{"program","arg1","arg2"};
Process p =rt.exec(arg);
BufferedInputStream buf = new     BufferedInputStream(p.getErrorStream());
int data=buf.read();
System.out.println("date is "+data);
BufferedInputStream buf1 = new     BufferedInputStream(p.getInputStream());
     while((data=buf1.read())!= -1)
          System.out.println("data input is "+data);
arg1 and arg2 are 2 arguments that the program needs . It always returns a value with might be 0 or non zero.
I know I can try to use JNI , but i beleive using Process is a simple solution (if it works)
Thanks

Answer 1

.o files are usually no executables but object files. They need to be linked (with an object including the main funtion) to yield an executable.
Shared objects are usually called *.so.