Shell Programming and Scripting

# create a backup with sane permissions in case this doesn't work
tar -cpf /path/to/backup.tar /path/to/outputfile

rm /path/to/outputfile
mkfifo /path/to/outputfile

while true
do
        cat /path/to/output > /tmp/$$
        echo "Received data from /path/to/output"
        # process /tmp/$$ as you please since it won't vanish from under you
done

while(<DATA>){
    if(/.*NAME="([^"]*).*Age="([^"]*).*D\.O\.B="([^"]*).*Gender="([^"]*).*/){
        print $1," ",$2," ",$3," ",$4,"\n";
        $age_hash{$2}++;
        $gender_hash{$4}++;
    }
}
print "\n";
foreach my $age(sort {$a<=>$b} keys %age_hash){
    print $age,": ",$age_hash{$age},"\n";
}