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# udev -- lintian check script -*- perl -*-
# Copyright © 2016 Petter Reinholdtsen
#
# 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 http://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::udev;
use strict;
use warnings;
use Lintian::Tags qw(tag);
# Check /lib/udev/rules.d/, detect use of MODE="0666" and use of
# GROUP="plugdev" without TAG+="uaccess".
sub run {
my ($pkg, $type, $info, $proc, $group) = @_;
my $rules_dir = $info->index_resolved_path('lib/udev/rules.d/');
return unless $rules_dir;
foreach my $file ($rules_dir->children) {
if (!$file->is_open_ok) {
tag('udev-rule-unreadable', $file);
next;
}
check_udev_rules($file, \&check_rule);
}
return;
}
sub check_rule {
my ($file, $linenum, $in_goto, $rule) = @_;
# for USB, if everyone or the plugdev group members are
# allowed access, the uaccess tag should be used too.
if (
$rule =~ m/SUBSYSTEM=="usb"/
&& ( $rule =~ m/GROUP="plugdev"/
|| $rule =~ m/MODE="0666"/)
&& $rule !~ m/ENV\{COLOR_MEASUREMENT_DEVICE\}/
&& $rule !~ m/ENV\{DDC_DEVICE\}/
&& $rule !~ m/ENV\{ID_CDROM\}/
&& $rule !~ m/ENV\{ID_FFADO\}/
&& $rule !~ m/ENV\{ID_GPHOTO2\}/
&& $rule !~ m/ENV\{ID_HPLIP\}/
&& $rule !~ m/ENV\{ID_INPUT_JOYSTICK\}/
&& $rule !~ m/ENV\{ID_MAKER_TOOL\}/
&& $rule !~ m/ENV\{ID_MEDIA_PLAYER\}/
&& $rule !~ m/ENV\{ID_PDA\}/
&& $rule !~ m/ENV\{ID_REMOTE_CONTROL\}/
&& $rule !~ m/ENV\{ID_SECURITY_TOKEN\}/
&& $rule !~ m/ENV\{ID_SMARTCARD_READER\}/
&& $rule !~ m/ENV\{ID_SOFTWARE_RADIO\}/
&& $rule !~ m/TAG\+="uaccess"/
) {
tag(
'udev-rule-missing-uaccess',
"$file:$linenum",
'user accessible device missing TAG+="uaccess"'
);
}
# Matching rules mentioning vendor/product should also specify
# subsystem, as vendor/product is subsystem specific.
if ( $rule =~ m/ATTR\{idVendor\}=="[0-9a-fA-F]+"/
&& $rule =~ m/ATTR\{idProduct\}=="[0-9a-fA-F]*"/
&& !$in_goto
&& $rule !~ m/SUBSYSTEM=="[^"]+"/) {
tag(
'udev-rule-missing-subsystem',
"$file:$linenum",
'vendor/product matching missing SUBSYSTEM specifier'
);
}
return 0;
}
sub check_udev_rules {
my ($file, $check) = @_;
my $fd = $file->open;
my $linenum = 0;
my $cont;
my $retval = 0;
my $in_goto = '';
while (<$fd>) {
chomp;
$linenum++;
if (defined $cont) {
$_ = $cont . $_;
$cont = undef;
}
if (/^(.*)\\$/) {
$cont = $1;
next;
}
next if /^#.*/; # Skip comments
$in_goto = '' if m/LABEL="[^"]+"/;
$in_goto = $_ if m/SUBSYSTEM!="[^"]+"/ && m/GOTO="[^"]+"/;
$retval |= $check->($file, $linenum, $in_goto, $_);
}
close($fd);
return $retval;
}
1;
# Local Variables:
# indent-tabs-mode: nil
# cperl-indent-level: 4
# End:
# vim: syntax=perl sw=4 sts=4 sr et
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