Shell Programming and Scripting

modiify_customer_feed_id()
{
   while IFS='' read line
   do
      f1="$(echo "$line" | cut -c1-18)"
      f2="$(echo "$line" | cut -c19-27)"
      f3="$(echo "$line" | cut -c28-854)"
      f2=$(echo "$f2"|sed 's/ /0/g')
      printf "%s%s%s\n" "$f1" "$f2" "$f3"
   done < ${SOURCEFILE} > $id_interim_file
   echo " ID PROCESS 1 "
   while IFS='' read line
   do
      f1="$(echo "$line" | cut -c1-18)"
      f2="$(echo "$line" | cut -c19-27)"
      f3="$(echo "$line" | cut -c28-854)"
      f2=$(echo "$f2"|sed 's/000000000/ /g')
      printf "%s%s%s\n" "$f1" "$f2" "$f3"
   done < $id_interim_file > $id_final_file
   echo " ID PROCESS 2 "
   if [[ $? -ne 0 ]]
   then
      rm -f $id_interim_file $id_final_file
      return 1
   else
      mv -f $id_final_file $SOURCEFILE
      rm -f $id_interim_file
      return 0
   fi
}

echo 'some_data_blablah_0       00' | awk '{
b=substr($0,1,18)
s=substr($0,19,9)
e=substr($0,28,length($0)-27)
gsub (" ","0",s)
if (s ~ /0{9}/) {gsub (" ","0",s)}
print b""s""e}'

modify_customer_feed()
{
while IFS='' read line
do
f1="$(echo "$line" | cut -c1-18)"
f2="$(echo "$line" | cut -c19-27)"
f2=$(echo "$f2"|sed 's/ /0/g')
f2=$(echo "$f2"|sed 's/000000000/         /g')
f3="$(echo "$line" | cut -c28-686)"
f4="$(echo "$line" | cut -c687-702)"
f4=$(echo "$f4"|sed 's/ /0/g')
f4=$(echo "$f4"|sed 's/0000000000000000/                /g')

f5="$(echo "$line" | cut -c703-718)"
f5=$(echo "$f5"|sed 's/ /0/g')
f5=$(echo "$f5"|sed 's/0000000000000000/                /g')
f6="$(echo "$line" | cut -c719-854)"
printf "%s%s%s%s%s%s\n" "$f1" "$f2" "$f3" "$f4" "$f5" "$f6"
done < ${SOURCEFILE}    >  $id_final_file

if [[ $? -ne 0 ]]
then
  rm -f  $id_final_file
  return 1
else
  mv -f $id_final_file $SOURCEFILE
  return 0
fi
}

awk '{
b=substr($0,1,18)
s=substr($0,19,9)
e=substr($0,28,length($0)-27)
gsub (" ","0",s)
if (s ~ /000000000/) {gsub ("0"," ",s);print b s e} else {print $0}}' file