Re: exec problem is JDK 1.7.0_21

On 4/21/2013 6:30 AM, Chris Uppal wrote:


I haven't followed this thread closely enough to really understand the
controversy. But I like experiments. And I never get to write anything
in C any more.

Windows XP (the results on Xubuntu 12.10 are identical)

One quoted argument "hello world"

C:\Documents and Settings\Knute Johnson>java test
argc=2
argv[0]=C:\Documents and Settings\Knute Johnson\test.exe
argv[1]=hello world
exitValue=123

Two arguments

C:\Documents and Settings\Knute Johnson>java test
argc=3
argv[0]=C:\Documents and Settings\Knute Johnson\test.exe
argv[1]=hello
argv[2]=world
exitValue=123

---

#include <stdio.h>

int main(int argc, char** argv) {
     int i = 0;

     printf("argc=%d\n",argc);
     for (i=0; i<argc; i++)
         printf("argv[%d]=%s\n",i,argv[i]);

     return 123;
}

---

import java.io.*;

public class test {
     public static void main(String[] args) throws Exception {
         ProcessBuilder pb = new ProcessBuilder("test.exe","hello world");
// ProcessBuilder pb = new
ProcessBuilder("test.exe","hello","world");
         pb.redirectError(new File("error"));

         Process p = pb.start();
         final InputStream is = p.getInputStream();

         Thread t = new Thread(new Runnable() {
             public void run() {
                 int n;
                 try {
                     while ((n = is.read()) != -1)
                         System.out.print((char)n);
                 } catch (IOException ioe) {
                     ioe.printStackTrace();
                 }
             }
         });
         t.start();
         t.join();

         System.out.println("exitValue=" + p.exitValue());
     }
}

--

Knute Johnson