diff options
Diffstat (limited to 'lib/Lintian/Check/Files/Compressed/Gz.pm')
-rw-r--r-- | lib/Lintian/Check/Files/Compressed/Gz.pm | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Files/Compressed/Gz.pm b/lib/Lintian/Check/Files/Compressed/Gz.pm new file mode 100644 index 0000000..6290247 --- /dev/null +++ b/lib/Lintian/Check/Files/Compressed/Gz.pm @@ -0,0 +1,113 @@ +# files/compressed/gz -- lintian check script -*- perl -*- + +# Copyright (C) 2020 Felix Lechner +# +# 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 version 2 of the License, 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, you can find it on the World Wide +# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free +# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, +# MA 02110-1301, USA. + +package Lintian::Check::Files::Compressed::Gz; + +use v5.20; +use warnings; +use utf8; + +use Const::Fast; +use Time::Piece; + +use Lintian::IPC::Run3 qw(safe_qx); + +use Moo; +use namespace::clean; + +with 'Lintian::Check'; + +# get timestamp of first member; https://tools.ietf.org/html/rfc1952.html#page-5 +const my $GZIP_HEADER_SIZE => 8; + +has changelog_timestamp => ( + is => 'rw', + lazy => 1, + default => sub { + my ($self) = @_; + + # remains 0 if there is no timestamp + my $changelog = $self->processable->changelog; + if (defined $changelog) { + + my ($entry) = @{$changelog->entries}; + return $entry->Timestamp + if $entry && $entry->Timestamp; + } + + return 0; + } +); + +sub visit_installed_files { + my ($self, $item) = @_; + + return + unless $item->is_file; + + if ($item->name =~ /\.gz$/si) { + + safe_qx('gzip', '--test', $item->unpacked_path); + + $self->pointed_hint('broken-gz', $item->pointer) + if $?; + } + + # gzip files + if ($item->file_type =~ /gzip compressed/) { + + my $bytes = $item->magic($GZIP_HEADER_SIZE); + my (undef, $gziptime) = unpack('VV', $bytes); + + if (defined $gziptime && $gziptime != 0) { + + # see https://bugs.debian.org/762105 + my $time_from_build = $gziptime - $self->changelog_timestamp; + if ($time_from_build > 0) { + + my $architecture + = $self->processable->fields->value('Architecture'); + my $multiarch + = $self->processable->fields->value('Multi-Arch') || 'no'; + + if ($multiarch eq 'same' && $item->name !~ /\Q$architecture\E/) + { + $self->pointed_hint( + 'gzip-file-is-not-multi-arch-same-safe', + $item->pointer); + + } else { + $self->pointed_hint('package-contains-timestamped-gzip', + $item->pointer,gmtime($gziptime)->datetime); + } + } + } + } + + return; +} + +1; + +# Local Variables: +# indent-tabs-mode: nil +# cperl-indent-level: 4 +# End: +# vim: syntax=perl sw=4 sts=4 sr et |