Hello
bentrim,
Ideally, you should be using a well-tested module like Text::CSV for these kind of activities. Since this is an one-time activity, I'm going to show you the simplest way. Why not do something like:
$ cat > somestuff.csv
10004,Able,Baker,able.baker@notrealemail.com
14634,Charley,Delta,charley.delta@notrealemail.com
12886,Echo,Foxtrot,echo.foxtrot@notrealemail.com
14366,Golf,Hotel,golf.hotel@notrealemail.com
10178,India,Juliet,india.juliet@notrealemail.com
10164,Kilo,Lima,kilo.lima@notrealemail.com
10124,Mike,November,mike.november@notrealemail.com
$ perl -pi -e 's/\Z/,UF,A,Y,9,U/' somestuff.csv
$ cat somestuff.csv
10004,Able,Baker,able.baker@notrealemail.com,UF,A,Y,9,U
14634,Charley,Delta,charley.delta@notrealemail.com,UF,A,Y,9,U
12886,Echo,Foxtrot,echo.foxtrot@notrealemail.com,UF,A,Y,9,U
14366,Golf,Hotel,golf.hotel@notrealemail.com,UF,A,Y,9,U
10178,India,Juliet,india.juliet@notrealemail.com,UF,A,Y,9,U
10164,Kilo,Lima,kilo.lima@notrealemail.com,UF,A,Y,9,U
10124,Mike,November,mike.november@notrealemail.com,UF,A,Y,9,U
$
Doing things like calling perl to do AWK is just overkill, since perl was meant to take in all the goodness of sed, awk and shell scripting, wiping away the pain of all other scripting stuff!
Do read more of perl "pie-ness" in perlrun and CSV handling in Text::CSV. Have fun!