1 files changed, 108 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Binaries/LargeFileSupport.pm b/lib/Lintian/Check/Binaries/LargeFileSupport.pm
new file mode 100644
index 0000000..e64d727
--- /dev/null
+++ b/lib/Lintian/Check/Binaries/LargeFileSupport.pm
@@ -0,0 +1,108 @@
+# binaries/large-file-support -- lintian check script -*- perl -*-
+
+# Copyright (C) 1998 Christian Schwarz and Richard Braakman
+# Copyright (C) 2012 Kees Cook
+# Copyright (C) 2017-2020 Chris Lamb <lamby@debian.org>
+# Copyright (C) 2021 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::Binaries::LargeFileSupport;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use List::SomeUtils qw(any);
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+has ARCH_REGEX => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my %arch_regex;
+
+        my $data = $self->data->load('binaries/arch-regex', qr/\s*\~\~/);
+        for my $architecture ($data->all) {
+
+            my $pattern = $data->value($architecture);
+            $arch_regex{$architecture} = qr{$pattern};
+        }
+
+        return \%arch_regex;
+    }
+);
+
+has LFS_SYMBOLS => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        return $self->data->load('binaries/lfs-symbols');
+    }
+);
+
+sub visit_installed_files {
+    my ($self, $item) = @_;
+
+    return
+      unless $item->is_file;
+
+    # The LFS check only works reliably for ELF files due to the
+    # architecture regex.
+    return
+      unless $item->is_elf;
+
+    # Only 32bit ELF binaries can lack LFS.
+    return
+      unless $item->file_type =~ $self->ARCH_REGEX->{'32'};
+
+    return
+      if $item->name =~ m{^usr/lib/debug/};
+
+    my @unresolved_symbols;
+    for my $symbol (@{$item->elf->{SYMBOLS} // [] }) {
+
+        # ignore if defined in the binary
+        next
+          unless $symbol->section eq 'UND';
+
+        push(@unresolved_symbols, $symbol->name);
+    }
+
+    # Using a 32bit only interface call, some parts of the
+    # binary are built without LFS
+    $self->pointed_hint('binary-file-built-without-LFS-support',$item->pointer)
+      if any { $self->LFS_SYMBOLS->recognizes($_) } @unresolved_symbols;
+
+    return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et