Shell Programming and Scripting

#!/bin/ksh
numfld=0
f1=comp1.txt
f2=comp2.txt
flddeli=";"
oifs="$IFS"

# this version is dynamic, take number of fld from source line
#
compare()
{
   f=0   # fldnum 0,1,2,...
   comp=$1  # how many flds we like to compare
   shift
   #echo "($comp) $*"
   while [ $# -gt 0 ]
   do
        value1="${flds[$f]}"
        value2="$1"
        #echo "$value1 - $value2"
        [ "$value1" != "$value2" ] && echo "line ${flds[*]}:fld $f: $value1 / $value2"
        shift
        ((f+=1))
   done
   ((  f  <  comp )) && echo "not enough fields (${flds[*]}) $comp/$f "
}


#####
cat "$f1" | while read line
do
     # put values to the array using some delimeter
     IFS="$flddeli"
     set -A flds $line
     IFS="$oifs"

     fldnum=${#flds[*]}

     # 1st fld is key
     key=${flds[0]}
     #create search value, remember key must include fld delimeter
     searchvalue="^${key}$flddeli"
     data=$( grep "$searchvalue"  "$f2"  2>/dev/null  )
     # if data empty, no record, skip to the next
     [ "$data" = "" ]  && echo "no line $line" && continue
     # we have data, use delimeter as commandline input fld separator - this is nice
     IFS="$flddeli"
     compare  $fldnum $data
     IFS="$oifs"
done