/**
  * With Netscape Navigator 2.0, this always raises security exception. 
  * 
  * With JDK 1.0 appletviewer, 
  *  for applets loaded over the net, if acl.read=/etc, then this works.
  *
  *  if you install this applet's .class file in a directory on your
  *  CLASSPATH, then the applet can read files on the client file
  *  system, regardless of how you set acl.read.
  *
  * @version JDK 1.0 beta
  * @author  Marianne Mueller
  */

import java.awt.*;
import java.io.*;
import java.lang.*;
import java.applet.*;

public class readFile extends Applet {
    String myFile = "/etc/passwd";
    String firstLine;

    public void testRead(Graphics g) throws IOException {

	SecurityException se = null;
	File f = new File(myFile);
	DataInputStream dis;

	if (f.exists())
	  try {
  	    dis = new DataInputStream(new BufferedInputStream(new FileInputStream(myFile),128));
	    firstLine = "First line is: " + dis.readLine();
	  } catch (IOException ioe) {
		System.out.println("testRead: caught IO exception");
		throw ioe;
	  } catch (SecurityException e) {
		se = e;
		throw e; 
	  }
	else firstLine = "but " + myFile + " doesn't exist";
    }


public void paint(Graphics g) {
	try {
		testRead(g);
		g.drawString("Successful attempt to access " + myFile, 10, 10);
	        g.drawString(firstLine, 10, 30);
	}
	catch (SecurityException e) {
		g.drawString("readFile: caught security exception", 10, 10);
        }
	catch (IOException ioe) {
		g.drawString("paint: caught i/o exception", 10, 10);
        }
		
   }
}