1 files changed, 131 insertions, 0 deletions
diff --git a/lib/Lintian/Check/Libraries/Shared/Trigger/Ldconfig.pm b/lib/Lintian/Check/Libraries/Shared/Trigger/Ldconfig.pm
new file mode 100644
index 0000000..66f5961
--- /dev/null
+++ b/lib/Lintian/Check/Libraries/Shared/Trigger/Ldconfig.pm
@@ -0,0 +1,131 @@
+# libraries/shared/trigger/ldconfig -- lintian check script -*- perl -*-
+
+# Copyright (C) 1998 Christian Schwarz
+# Copyright (C) 2018-2019 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::Libraries::Shared::Trigger::Ldconfig;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use List::SomeUtils qw(any uniq);
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+has soname_by_filename => (
+    is => 'rw',
+    lazy => 1,
+    default => sub {
+        my ($self) = @_;
+
+        my %soname_by_filename;
+        for my $item (@{$self->processable->installed->sorted_list}) {
+
+            $soname_by_filename{$item->name}= $item->elf->{SONAME}[0]
+              if exists $item->elf->{SONAME};
+        }
+
+        return \%soname_by_filename;
+    }
+);
+
+has must_call_ldconfig => (is => 'rw', default => sub { [] });
+
+sub visit_installed_files {
+    my ($self, $item) = @_;
+
+    my $resolved_name = $item->name;
+    $resolved_name = $item->link_normalized
+      if length $item->link;
+
+    # Installed in a directory controlled by the dynamic
+    # linker?  We have to strip off directories named for
+    # hardware capabilities.
+    # yes! so postinst must call ldconfig
+    push(@{$self->must_call_ldconfig}, $resolved_name)
+      if exists $self->soname_by_filename->{$resolved_name}
+      && $self->needs_ldconfig($item);
+
+    return;
+}
+
+sub installable {
+    my ($self) = @_;
+
+    # determine if the package had an ldconfig trigger
+    my $triggers = $self->processable->control->resolve_path('triggers');
+
+    my $we_trigger_ldconfig = 0;
+    $we_trigger_ldconfig = 1
+      if defined $triggers
+      && $triggers->decoded_utf8
+      =~ /^ \s* activate-noawait \s+ ldconfig \s* $/mx;
+
+    $self->hint('package-has-unnecessary-activation-of-ldconfig-trigger')
+      if !@{$self->must_call_ldconfig}
+      && $we_trigger_ldconfig
+      && $self->processable->type ne 'udeb';
+
+    $self->hint('lacks-ldconfig-trigger',
+        (sort +uniq @{$self->must_call_ldconfig}))
+      if @{$self->must_call_ldconfig}
+      && !$we_trigger_ldconfig
+      && $self->processable->type ne 'udeb';
+
+    return;
+}
+
+sub needs_ldconfig {
+    my ($self, $item) = @_;
+
+   # Libraries that should only be used in the presence of certain capabilities
+   # may be located in subdirectories of the standard ldconfig search path with
+   # one of the following names.
+    my $HWCAP_DIRS = $self->data->load('shared-libs/hwcap-dirs');
+    my @ldconfig_folders = @{$self->data->architectures->ldconfig_folders};
+
+    my $dirname = $item->dirname;
+    my $encapsulator;
+    do {
+        $dirname =~ s{ ([^/]+) / $}{}x;
+        $encapsulator = $1;
+
+    } while ($encapsulator && $HWCAP_DIRS->recognizes($encapsulator));
+
+    $dirname .= "$encapsulator/" if $encapsulator;
+
+    # yes! so postinst must call ldconfig
+    return 1
+      if any { $dirname eq $_ } @ldconfig_folders;
+
+    return 0;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et