package modalias;
# TODO:
# - be faster (Elapsed time: lspcidrake.pl ~ 0.28s instead of 0.12s for old lspcidrake
use strict;
use MDK::Common;
use c;
my @config_groups = (
[
"/lib/module-init-tools/modprobe.default",
"/etc/modprobe.conf",
"/etc/modprobe.d",
],
);
my @system_groups = (
[
"/lib/module-init-tools/ldetect-lst-modules.alias",
],
[
"/lib/modules/" . c::kernel_version() . "/modules.alias",
],
);
my @classes = qw(ide ieee1394 input pci pcmcia pnp serio usb);
my @alias_groups;
my $alias_re = qr/^\s*alias\s+(([^:]+):\S+)\s+(\S+)$/;
sub alias_to_ids {
my ($alias) = @_;
my ($vendor, $device);
# returns (vendor, device)
if (($vendor, $device) = $alias =~ /:v([0-9A-F]{4})[dp]([0-9A-F]{4})/) {
return ($vendor, $device);
} elsif (($vendor, $device) = $alias =~ /:v0{4}([0-9A-F]{4})[dp]0{4}([0-9A-F]{4})/) {
return ($vendor, $device);
}
}
sub parse_path {
my ($group, $path) = @_;
if (-d $path) {
parse_path($group, "$path/$_") foreach all($path);
} elsif (-f $path) {
foreach (cat_($path)) {
if (my ($alias, $class, $module) = $_ =~ $alias_re) {
if (member($class, @classes)) {
my ($vendor, $device) = alias_to_ids($alias);
if ($vendor) {
$group->{$class} ||= {};
$group->{$class}{$vendor} ||= {};
$group->{$class}{$vendor}{$device} ||= [];
push @{$group->{$class}{$vendor}{$device}}, $alias, $module;
} else {
push @{$group->{$class}{other}}, $alias, $module;
}
}
}
}
}
}
sub parse_file_modules {
my ($path) = @_;
my %modules;
foreach (cat_($path)) {
if (my ($alias, undef, $module) = $_ =~ $alias_re) {
push @{$modules{$module}}, $alias;
}
}
\%modules;
}
sub get_alias_groups {
my ($o_skip_config) = @_;
#- FIXME: only o_skip_config from the first call is considered
@alias_groups = map {
my $group = {};
parse_path($group, $_) foreach @$_;
$group;
} if_(!$o_skip_config, @config_groups), @system_groups unless @alias_groups;
@alias_groups;
}
sub get_modules {
my ($modalias, $o_skip_config) = @_;
my ($class) = $modalias =~ /^([^:]+):\S+$/;
my ($vendor, $device) = alias_to_ids($modalias);
$class && member($class, @classes) or return;
require File::FnMatch;
foreach my $group (get_alias_groups($o_skip_config)) {
my @aliases;
foreach my $subgroup ($group->{$class}{$vendor}{$device}, $group->{$class}{other}) {
foreach (group_by2(@$subgroup)) {
File::FnMatch::fnmatch($_->[0], $modalias) and push @aliases, $_->[1];
}
}
return uniq(@aliases) if @aliases;
}
}
1;
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