#!/bin/sh

#  This program uses recursion to print all files in t directory tree.
#  Like ls -R except it can be modified to do stuff.  
#  
#  I plan to add ability to change mode of files with certain file extensions
#  like .txt or .cpp 
#  

if [ $# -lt 3 ]; then 
  echo -e "\n  Error: Too few arguments: Usage: \n\n\
$0    starting_dir    targ_file_extention    octal_mode \n";
  exit;
fi;


function list_dir()
{ 
  local last_d=$(pwd);
  echo "---- In list_dir () $1   (from $last_d) ----";

  cd $1;
  local i=0;
  local fn; 
  for fn in $(ls); do
    ((i++));
    if [ -f $fn ]; then
      ((t_files++))  
      echo "$i fn= $fn";
    elif [ -d $fn ]; then
      echo "Recursing to \"$fn\" "; 
      list_dir $fn;
    else 
      echo "Unrecognized file type"; 
    fi;
  done;
  cd $last_d;
  echo "----  changing back to $last_d ----\n";
}

echo "#####  Begin:  ##### ";

tfiles=0;
old_d=$(pwd);
start_d=$1;

if [ -d $start_d ]; then list_dir $start_d; fi;

echo "t_files = $t_files";
echo "#####  End  ##### ";

cd $old_d;

exit 0;

#####################################################################
#  recurse_chmod  ~/xdir  .txt  644