Shell Programming and Scripting

#!/bin/ksh
# Check if line sums match with control file.
# Usage ./compresser.sh <pattern>

ls -ltr | grep "$1" | grep -v control | awk ' { print $9 } ' > tmp1
ttt=`ls -ltr | grep "$1" | grep control | awk ' { print $9 } '`
#echo "Control File=$ttt"
echo "Comparing sums..."

while read line
    do    
        t1=`echo "$line" | awk -F"," '{print $1}'`
        sumt1=`echo "$line" | awk -F"," '{print $3}'`
        t2=`grep -i "gnc$t1" tmp1`
        sumt2=`wc -l $t2 | awk ' { print $1 } '`
           if [ $sumt1 -eq $sumt2 ]; then
           continue
           else mailx -s "$t1 $t2 sums unmatched" abc@abc.com
           echo "Sum matching error for $t1!"
           exit 1
           fi
     done < $ttt