Shell Programming and Scripting

Hi,

I am trying to create a while loop that will do the following:

INFILE= list of new records that need to be added after last previous record
while read record
do
find the last record processed
create list of new records output to a file
echo "$record">> $NEWFILE
done

Please advice. Thank You in advance

what do you mean by last previous record??

the INFILE will be a file of new records that need to be added to a file sorry.

I know I'm missing something but you want to add records in one file to another existing file - and add them at the end, right?

Code:

cat newrecordsfile >> oldrecordsfile

oldrecordsfile now has added all of the records in newrecordsfile

The thought process with this is you have the INFILE being updated every ten minutes lets say. So in the while loop you would read the record of the INFILE. Find the last record in the INFILE that was processed in another file called fileB. Create a new list called OUTFILE that captures the new files that need to be updated in fileB that was not processed after the last update of INFILE.

Hope this explains more.

I might be missing something, but...

Code:

tail -f newrecordsfile >> oldrecordsfile

that is only going to give me the last line. I need the last file processed in FileB to be in the starting point of where i left off in FileA. For example if i have FileA getting updated every ten minutes. FileA could start off with 1234 in the file that i send to FileB. So now FileB is 1234. But after 10 min FileA is now 123456. How do i send 456 to the end of FileB?