Or even better? 

#!/usr/bin/perl
use warnings;
use strict;
use Fcntl qw/ :seek :flock /;

my $file = 'dogy';

open my $FH, '+<', $file or die "Cannot open '$file' $!";
flock $FH, LOCK_EX or die "Cannot flock '$file' $!";
my @newEntries = grep !($_ % 2), <$FH>;
seek $FH, 0, SEEK_SET or die "Cannot seek '$file' $!";
truncate $FH, 0 or die "Cannot truncate '$file' $!";
print $FH @newEntries;
close $FH;

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In reply to Re^2: seek in a text file by jwkrahn
in thread seek in a text file by catfood

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