#!/usr/bin/perl

# Copyright (C) 2005 Mandriva
# Olivier Blin
#
# 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, 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

@ARGV > 1 or die "usage: $0 [--no-modprobe] [--no-driver-agent] subsystem /path/to/map1.usermap [/path/to/map2.usermap]";

my $agents_dir = '/etc/udev/agents.d';

my %flags = (
    idVendor => 0x0001,
    idProduct => 0x0002,
    bcdDevice_lo => 0x0004,
    bcdDevice_hi => 0x0008,
    bDeviceClass => 0x0010,
    bDeviceSubClass => 0x0020,
    bDeviceProtocol => 0x0040,
    bInterfaceClass => 0x0080,
    bInterfaceSubClass => 0x0100,
    bInterfaceProtocol => 0x0200,
);

my ($no_modprobe, $no_driver_agent);

@ARGV = grep {
    if ($_ eq "--no-modprobe") {
	$no_modprobe = 1;
	0;
    } elsif ($_ eq "--no-driver-agent") {
	$no_driver_agent = 1;
	0;
    } else {
	1;
    }
} @ARGV;

my $subsystem = shift @ARGV;

sub parse_usermap_line {
    local $_ = shift;
    /^#/ and next;
    my %match;
    @match{module, match_flags, idVendor, idProduct, bcdDevice_lo, bcdDevice_hi, bDeviceClass, bDeviceSubClass, bDeviceProtocol, bInterfaceClass, bInterfaceSubClass, bInterfaceProtocol, driver_info} = 
	/^(\S+)\s+0x(\w{2,})\s+0x(\w{2,})\s+0x(\w{2,})\s+0x(\w{2,})\s+0x(\w{2,})\s+0x(\w{2})\s+0x(\w{2})\s+0x(\w{2})\s+0x(\w{2})\s+0x(\w{2})\s+0x(\w{2})(?:\s+0x(\w{2,}))?/
	or die qq(unable to parse line "$_");
    $match{driver_info} ||= 0;

    my @rule = qq(SUBSYSTEM=="$subsystem");
    while (my ($key, $flag) = each(%flags)) {
	hex($match{match_flags}) & $flag and push @rule, qq(SYSFS{$key}=="$match{$key}");
    }
    push @rule, qq(RUN+="/sbin/modprobe $match{module}") unless $no_modprobe;
    push @rule, qq(RUN+="$agents_dir/$subsystem/$match{module}") unless $no_driver_agent;
    print join(', ', @rule) . "\n";
}

foreach my $usermap (@ARGV) {
    open(my $IN, $usermap . (-x $usermap && "|")) or die "unable to open usermap $usermap";
    parse_usermap_line($_) foreach <$IN>;
}