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/* ============================================================================
# Create
# name  : Andre Rikkert de Koe          date:   apr 2011
# descr : filefind
#         This is a demo of programming in the java language.
#         Its part of a project to implement a program to create a directory
#         tree similar to the output of the Unix find program.
# EUID  : Any user who has read access to all the files being searched for.
# run   : interactive
#
# Changes
# name  :                               date:
# descr : short description
#
# ========================================================================== */

import java.io.*;
import java.util.*;

public class filefind
{
        protected File base;
        protected PrintStream out;

        static void Usage(String progname, String mesg)
        {
                System.out.println("Usage: " + progname + " directory");
                System.out.println(mesg);
        }
        
        static boolean issymlink(File file1)
        {
                boolean result;
                try
                {
                        result = !file1.getAbsolutePath().equals(file1.getCanonicalPath());
                }
                catch (IOException ie)
                {
                        System.err.println("Caught IOException: " + ie.getMessage());
                        result = false;
                }
                return result;
        }

        public filefind(String filename)
        {
                base = new File(filename);
        }

        static void start_traverse(File base, String basename)
        {
                System.out.println(basename);
                traverse(base);
        }

        static void traverse(File b)
        {
                File [] subs = b.listFiles();
                for(int i = 0; i < subs.length; i++)
                {
                        if (subs[i].isDirectory() && !issymlink(subs[i]))
                        {
                                System.out.println(subs[i]);
                                traverse(subs[i]);
                        }
                        else
                        {
                                System.out.println(subs[i]);
                        }
                }
        }

/* ============================================================================
# MAIN
# ========================================================================== */

        public static void main(String [] args)
        { 
                String basename;
                String progname = "filefind"; 
                if (args.length == 1)
                {
                        basename = args[0];
                        File base = new File(basename);
                        if (base.isDirectory())
                        {
                                start_traverse(base, basename);
                        }
                        else
                        {
                                Usage(progname, "ERROR: No directory " + basename + " found");
                        }
                }
                else
                Usage(progname, "ERROR: 1 argument expected");
        }
}