/usr/share/namazu/filter/deb.pl is in namazu2-index-tools 2.0.21-9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# -*- Perl -*-
# $Id: deb.pl,v 1.5.4.10 2008-05-09 07:22:08 opengl2772 Exp $
# Copyright (C) 2000-2008 Namazu Project All rights reserved ,
# This is free software with ABSOLUTELY NO WARRANTY.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either versions 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA
#
# This file must be encoded in EUC-JP encoding
#
package deb;
use strict;
require 'util.pl';
require 'gfilter.pl';
my $dpkgpath = undef;
my @dpkgopts = undef;
sub mediatype() {
return ('application/x-deb');
}
sub status() {
$dpkgpath = util::checkcmd('dpkg');
@dpkgopts = ("--info");
return 'no' unless (defined $dpkgpath);
return 'yes';
}
sub recursive() {
return 0;
}
sub pre_codeconv() {
return 0;
}
sub post_codeconv () {
return 0;
}
sub add_magic ($) {
my ($magic) = @_;
# FIXME: very ad hoc.
$magic->addFileExts('\\.deb$', 'application/x-deb');
return;
}
sub filter ($$$$$) {
my ($orig_cfile, $cont, $weighted_str, $headings, $fields)
= @_;
my $cfile = defined $orig_cfile ? $$orig_cfile : '';
util::vprint("Processing deb file ... (using '$dpkgpath')\n");
my $tmpfile = util::tmpnam('NMZ.deb');
{
my $fh = util::efopen("> $tmpfile");
print $fh $$cont;
util::fclose($fh);
}
{
my %env = (
"LC_ALL" => $util::LANG,
"LANGUAGE" => $util::LANG,
);
my @cmd = ($dpkgpath, @dpkgopts, $tmpfile);
my $fh_out = IO::File->new_tmpfile();
my $status = util::syscmd(
command => \@cmd,
option => {
"stdout" => $fh_out,
"stderr" => "/dev/null",
},
env => \%env,
);
my $size = util::filesize($fh_out);
if ($size == 0) {
util::fclose($fh_out);
unlink $tmpfile;
return "Unable to convert file ($dpkgpath error occurred)";
}
if ($size > $conf::FILE_SIZE_MAX) {
util::fclose($fh_out);
unlink $tmpfile;
return 'Too large deb file';
}
$$cont = util::readfile($fh_out);
util::fclose($fh_out);
}
unlink $tmpfile;
codeconv::normalize_document($cont);
dpkg_filter($cont, $weighted_str, $fields, $headings);
gfilter::line_adjust_filter($cont);
gfilter::line_adjust_filter($weighted_str);
gfilter::white_space_adjust_filter($cont);
$fields->{'title'} = gfilter::filename_to_title($cfile, $weighted_str)
unless $fields->{'title'};
gfilter::show_filter_debug_info($cont, $weighted_str,
$fields, $headings);
return undef;
}
sub dpkg_filter ($$$$) {
my ($contref, $weighted_str, $fields, $headings) = @_;
deb::get_title($contref, $weighted_str, $fields);
deb::get_author($contref, $fields);
# deb::get_date($contref, $fields);
deb::get_size($contref, $fields);
deb::get_summary($contref, $fields);
return;
}
# Below is the sample result of 'dpkg --info deb'.
#
# new debian package, version 2.0.
# size 30606 bytes: control archive= 1247 bytes.
# 351 bytes, 12 lines control
# 1174 bytes, 18 lines md5sums
# 389 bytes, 11 lines * postinst #!/bin/sh
# 143 bytes, 4 lines * postrm #!/bin/sh
# 184 bytes, 6 lines * prerm #!/bin/sh
# Package: irb
# Version: 1.6.2-1
# Section: interpreters
# Priority: optional
# Architecture: all
# Depends: ruby (>= 1.6.2-1), libreadline-ruby (>= 1.6.2-1)
# Installed-Size: 139
# Maintainer: akira yamada <akira@debian.org>
# Source: ruby
# Description: The Intaractive Ruby.
# The irb is acronym for Interactive RuBy. It evaluates ruby expression
# from the terminal.
sub get_title ($$$) {
my ($contref, $weighted_str, $fields) = @_;
if ($$contref =~ /^ Description: (.*)/m) {
my $tmp = $1;
$fields->{'title'} = $tmp;
my $weight = $conf::Weight{'html'}->{'title'};
$$weighted_str .= "\x7f$weight\x7f$tmp\x7f/$weight\x7f\n";
}
}
sub get_author ($$) {
my ($contref, $fields) = @_;
if ($$contref =~ /^ Maintainer: (.*)/m) {
my $tmp = $1;
$fields->{'author'} = $tmp;
}
}
sub get_size ($$) {
my ($contref, $fields) = @_;
if ($$contref =~ /^ size (\d+) bytes:/m) {
my $tmp = $1;
$fields->{'size'} = $tmp;
}
}
sub get_summary ($$) {
my ($contref, $fields) = @_;
if ($$contref =~ /^.*Description:[^\n]*\n(.*)/is) {
my $tmp = $1;
$fields->{'summary'} = $tmp;
}
}
1;
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