open IN, "somefile.txt";
$fileheadinfo = <IN>;
$/ = "Batch";
while ($batch = <IN>) {
    next if $batch = "Batch"; #first line
    @lines = split /\n/,$batch;
    $batchinfo = "Batch" . shift @lines; #get batch info
    pop @lines; #get rid of bar Batch at end
    foreach $line (@lines) {
       process($line)
    }
}