Shell Programming and Scripting

#!/bin/bash
#set -x
if [ "$1" == "" ]
  echo "usage of full text search in files:"
  echo "fts filename searchword"
else
  cd /
  find . -type f -name $1 | tee /tmp/allfiles.out | nl | tail -n 1 | awk '{FS=" "; printf $1"\n";}' > /tmp/filecnt.out
  cnt=$(cat /tmp/filecnt.out)
  cntpart=$(expr $cnt / 20)
  #echo $cnt":"$cntpart
  fd=0
  rm /tmp/af.out 2>/dev/null
  rm /tmp/fl.out 2>/dev/null
  rm /tmp/fg.out 2>/dev/null
  touch /tmp/af.out
  echo -n "start to search in files .."
  while read l
  do
    less $l 2> /dev/null > /tmp/fl.out
    grep $2 /tmp/fl.out > /tmp/fg.out
    fs=$(ls /tmp/fg.out -l | awk '{FS=" "; printf $5;}')
    #echo "filesize: "$fs
    if [ "$fs" -gt 0 ]; then
      #echo "found another file..."
      echo "file: "$l >> af.out
      less /tmp/fg.out >> af.out
    fi
    fd=$(expr $fd + 1)
    if [ "$fd" -eq $cntpart ]; then
      echo -n ".."
      fd=0
    fi
  done < /tmp/allfiles.out
  more /tmp/af.out
fi

echo "file: "$l >> af.out
less /tmp/fg.out >> af.out

// Linux version 2.6.32-33-server (Ubuntu 4.4.3-4ubuntu5) //