looks up USB ID information

usb-lookup.pl

#!/usr/bin/env perl
#
# usb-lookup.pl - looks up USB ID information
#
# Looks up USB ID information from http://www.linux-usb.org/usb.ids.
#
# Seungwon Jeong <seungwon0@gmail.com>
#
# Copyright (C) 2014 by Seungwon Jeong
#
# 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 3 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, see
# <http://www.gnu.org/licenses/>.

use perl5i::2;

use IO::All;

use Readonly;

if ( @ARGV < 1 ) {
    say "Usage: ${PROGRAM_NAME} USB_ID ...";
    exit 2;
}

# Readonly my $USB_IDS => 'http://www.linux-usb.org/usb.ids';
Readonly my $USB_IDS => '/usr/share/hwdata/usb.ids';

my @lines = io($USB_IDS)->chomp->slurp;
@lines = grep { !/ ^ \s* $ /xms } @lines;    # Delete blank lines
@lines = grep { !/ ^ [#] /xms } @lines;      # Delete comments

# Syntax:
# vendor  vendor_name
#	device  device_name				<-- single tab
#		interface  interface_name		<-- two tabs
@lines = grep {/ ^ \t? [\da-f]{4} /xmsi} @lines;

my %usb_id;
my $current_vendor;
for my $line (@lines) {
    if ( $line =~ / ^ \t /xms ) {
        my ( $device, $device_name ) = split q{ }, $line, 2;
        $usb_id{$current_vendor}{$device} = $device_name;
    }
    else {
        my ( $vendor, $vendor_name ) = split q{ }, $line, 2;
        $usb_id{$vendor}{vendor_name} = $vendor_name;
        $current_vendor = $vendor;
    }
}

my $first = 1;

for my $usb_id (@ARGV) {
    if ($first) {
        $first = 0;
    }
    else {
        say q{};    # Blank line
    }

    my ( $vendor, $device ) = split / : /xms, $usb_id;

    say $usb_id;

    next if !defined $usb_id{$vendor};

    say $usb_id{$vendor}{vendor_name};

    if ( defined $device ) {
        next if !defined $usb_id{$vendor}{$device};

        say $usb_id{$vendor}{$device};
    }
}