Hi,

I was wondering hwo to go about making sure that a user has access to
read or write to a folder/file on the local/network file system given
just the path from Java. I have a simple test program:

import java.io.*;
import java.lang.*;

public class FileCheck {
 public static void main(String[] args) {
   if (args.length < 1) {
     System.out.println("Please provide the path to the file to
process.");
     return;
   }

   String filePath = args[0];
   SecurityManager sm = System.getSecurityManager();
    if (sm == null) {
      System.out.println("Whoops!! Security manager not found.");
    }
    else {
      sm.checkRead(filePath);
      sm.checkWrite(filePath);
    }
 }
}

which I run as:
java -Djava.security.manager FileCheck <<path to file/folder>>

The problem:
Read access check succeeds for any files in the folder from where I
run the app, however Write access fails everywhere and Read access
fails everywhere outside the folder from which it is run.

TraceBack:
java.security.AccessControlException: access denied
(java.io.FilePermission FileCheck.java write)
       at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269)
       at java.security.AccessController.checkPermission(AccessController.java:401)
       at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
       at java.lang.SecurityManager.checkWrite(SecurityManager.java:954)
       at FileCheck.main(FileCheck.java:20)

I have also tried using FilePermission:
      FilePermission fp = new FilePermission(filePath, "read");
      sm.checkPermission(fp);
      fp = new FilePermission(filePath, "write");
      sm.checkPermission(fp);
Traceback:
java.security.AccessControlException: access denied
(java.io.FilePermission FileCheck.java write)
       at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269)
       at java.security.AccessController.checkPermission(AccessController.java:401)
       at java.lang.SecurityManager.checkPermission(SecurityManager.java:524)
       at FileCheck.main(FileCheck.java:18)

What I would like to be able to do is is the user on that system has
the right to read/write a file system resource, irrespective of where
its run from.

Any help would be greatly appreciated.

TIA
AM