3 # Perl script to add rTorrent fast resume data to torrent files.
6 # rtorrent_fast_resume.pl [base-directory] < plain.torrent > with_fast_resume.torrent
11 use Convert::Bencode qw(bencode bdecode);
14 my $t = bdecode(scalar <STDIN>);
17 die "$d is not a directory\n" if $d and not -d $d;
19 $d .= "/" unless $d =~ m#/$#;
21 die "No info key.\n" unless ref $t eq "HASH" and exists $t->{info};
22 my $psize = $t->{info}{"piece length"} or die "No piece length key.\n";
26 if (exists $t->{info}{files}) {
27 print STDERR "Multi file torrent: $t->{info}{name}\n";
28 for (@{$t->{info}{files}}) {
29 push @files, join "/", $t->{info}{name},@{$_->{path}};
30 $tsize += $_->{length};
33 print STDERR "Single file torrent: $t->{info}{name}\n";
34 @files = ($t->{info}{name});
35 $tsize = $t->{info}{length};
37 my $chunks = int(($tsize + $psize - 1) / $psize);
38 print STDERR "Total size: $tsize bytes; $chunks chunks; ", scalar @files, " files.\n";
40 die "Inconsistent piece information!\n" if $chunks*20 != length $t->{info}{pieces};
42 $t->{libtorrent_resume}{bitfield} = $chunks;
44 die "$d$files[$_] not found.\n" unless -e "$d$files[$_]";
45 my $mtime = (stat "$d$files[$_]")[9];
46 $t->{libtorrent_resume}{files}[$_] = { priority => 2, mtime => $mtime };