package Modules::Root;

#   $Id: Root.pm,v 1.5 2003/11/20 05:12:33 dannf Exp $

#   Copyright (c) 2001-2002 International Business Machines

#   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, write to the Free Software
#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#   Sean Dague <sean@dague.net>

=head1 NAME

Modules::Root - determine what modules are needed for root filesystem

=head1 SYNOPSIS

 my @modules = get_root_fs_modules('/etc/fstab');

=head1 DESCRIPTION

=cut

use strict;
use Carp;
use base qw(Exporter);
use vars qw($VERSION @EXPORT);

$VERSION = sprintf("%d.%02d", q$Revision: 1.5 $ =~ /(\d+)\.(\d+)/);

@EXPORT = qw(get_root_fs_modules);

my %FS_MODULES = (
                  ext3 => ['ext3','jbd'],
                  reiserfs => ['reiserfs'],
                  xfs => ['xfs'],
                 );

# find the modules needed for a root filesystem

sub get_root_fs_modules {
    my ($file) = @_;
    my @modules = ();
    open(IN,"<$file");
    while(<IN>) {
        my ($device, $mount, $fstype, $options, $one, $two) = split(/\s+/,$_);
        if($mount eq '/') {
            if($FS_MODULES{$fstype}) {
                push @modules, @{$FS_MODULES{$fstype}};
            }
        }
    }
    return @modules;
}

1;