How do I extract lines between two line delimiters in Perl?

Question

I have an ASCII log file with some content I would like to extract. I\'ve never taken time to learn Perl properly, but I figure this is a good tool for this task.

Th

Answer 1

Not too bad for coming from a "virtual newcommer". One thing you could do, is to put the "$found=1" inside of the "if($found == 0)" block so that you don't do that assignment every time between $start and $stop.

Another thing that is a bit ugly, in my opinion, is that you open the same filehandler each time you enter the $start/$stop-block.

This shows a way around that:

#!/usr/bin/perl

use strict;
use warnings;

my $start='CINFILE=$';
my $stop='^#$';
my $filename;
my $output;
my $counter=1;
my $found=0;

while (<>) {

    # Find block of lines to extract                                                           
    if( /$start/../$stop/ ) {

        # Start of block                                                                       
        if( /$start/ ) {
            $filename=sprintf("boletim_%06d.log",$counter);
            open($output,'>>'.$filename) or die $!;
        }
        # End of block                                                                         
        elsif ( /$end/ ) {
            close($output);
            $counter++;
            $found = 0;
        }
        # Middle of block                                                                      
        else{
            if($found == 0) {
                print $output (split(/ /))[1];
                $found=1;
            }
            else {
                print $output $_;
            }
        }

    }
    # Find block of lines to extract                                                           

}