#!/bin/sh

# The extra credit script tofix the hacker attacks
 imge() {
 cat $1 | egrep -a '$2' > chunk

awk -F'@#||@@#' '{print $3, $4}'  chunk > dm

awk -F: '{ newline=$2; split(newline,s,"[[:alpha:](*%]"); print s[0] + s[1] + s[2] + s[3] + s[4] + s[5] + s[6] + s[7] + s[8] + s[9] + s[10] + s[11] + s[12] + s[13] + s[14] + s[15] + s[16], ":" $1}'  dm >  unsrted

cat unsrted | awk -F: '{

 if ($2>max)
    max=$2
    arr[$2]=$0
}

 END{
 for(x=1;x<=max;x++)
  print arr[x]
}'  > srted
}

extact() {
 cat $infl | egrep -a '$regexp' > chunk

awk -F'@#||@@#' '{print $3, $4}'  chunk > dm

awk -F: '{ newline=$2; split(newline,s,"[[:alpha:](*%]"); print s[0] + s[1] + s[
2] + s[3] + s[4] + s[5] + s[6] + s[7] + s[8] + s[9] + s[10] + s[11] + s[12] + s[
13] + s[14] + s[15] + s[16], ":" $1}'  dm >  unsrted

cat unsrted | awk -F: '{

 if ($2>max)
    max=$2
    arr[$2]=$0
}

 END{
 for(x=1;x<=max;x++)
  print arr[x]
}'  > srted
}

cln() {

sed 's/@\{1,2\}#.*@#//g' $1 > $3


}

cln() {

sed 's/@\{1,2\}#.*@#//g' $1 > $outfl


}

if [ $1 ]
then
    :
else
    echo "Enter the input file name"
    read $infl
    echo $infl
fi

   if [ $2 ]
   then
       :
   else
       echo "Enter your regular expression"
       read $regexp
       echo $regexp
   fi

      if [ $3 ]
      then
          : 
      else
          echo "Enter the name of the output file"
          read $outfl
          echo $outfl
      fi

if [ $1 ] && [ $2 ] && [ $3 ]
 then
 imge
 cln
else
 extact
 climge
fi