#!/usr/bin/perl

# XFdrake
# Copyright (C) 2002 MandrakeSoft (pixel@mandrakesoft.com)
#
# 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.

use lib qw(/usr/lib/libDrakX);

use standalone;     #- warning, standalone must be loaded very first, for 'explanations'

use detect_devices;
use common;
use fsedit;
use lang;
use any;
use fs;

$::testing = $ARGV[0] eq '--test' && shift;
my ($raw_action, $device_name) = @ARGV;
my ($action) = $raw_action =~ /^--(add|del)/;

@ARGV == 2 && $action or die "usage: drakupdate_fstab [--test] [--add | --del] <device>\n";

main($action, $device_name);


sub device_name_to_entry {
    my ($name) = @_;
    $name =~ s|/dev/||;
    my @l = detect_devices::get();

    my ($e, $nb);
    if ((my $devfs_prefix, $nb) = $name =~ m,(.*)/(?:cd|disc|part(\d+))$,) {
	($e) = grep { $_->{devfs_prefix} eq $devfs_prefix } @l or return;
    } else {
	if (($e) = grep { $name eq $_->{device} } @l) {
	    $nb = '';
	} else {
	    (my $prefix, $nb) = $name =~ m/^(.*?)(\d*)$/;
	    ($e) = grep { $prefix eq ($_->{prefix} || $_->{device}) } @l or return;
	}
    }

    if ($nb) {
	$e->{devfs_device} = $e->{devfs_prefix} . '/part' . $nb;
	$e->{device} = ($e->{prefix} || $e->{device}) . $nb;
    }
    $e;
}

sub set_options {
    my ($part) = @_;
    my $use_supermount = cat_('/etc/fstab') =~ /supermount/;
    my $security = any::get_secure_level();
    my ($iocharset, $codepage) = lang::fs_options(lang::read());

    fs::set_default_options($part, 1, $use_supermount, $security, $iocharset, $codepage);
}

sub set_mount_point {
    my ($part, $fstab) = @_;
    my $mntpoint = detect_devices::suggest_mount_point($part) or return;
    $mntpoint = "/mnt/$mntpoint";

    foreach ('', 2 .. 10) {
	next if fsedit::mntpoint2part("$mntpoint$_", $fstab);
	$part->{mntpoint} = "$mntpoint$_";
	return 1;
    }
    0;
}

sub main {
    my ($action, $device_name) = @_;
    my $part = device_name_to_entry($device_name);
    my $fstab_file = '/etc/fstab';
    if (!$part) {
	print STDERR "Can't find device $device_name\n" if $::testing;
	return;
    } elsif ($::testing) {
	cp_af('/etc/fstab', $fstab_file = '/tmp/fstab');
    }

    my $fstab = [ fs::read_fstab('', '/etc/fstab', 'keep_freq_passno', 'verbatim_credentials') ];
    my ($existing_fstab_entries, $fstab_) = partition { $_->{device} eq $part->{device} || $_->{device} eq $part->{devfs_device} } @$fstab;

    if ($action eq 'add') {
	if (@$existing_fstab_entries) {
	    print STDERR "Already in fstab\n" if $::testing;
	    return;
	}
	set_options($part);
	set_mount_point($part, $fstab) or return;
	
	my ($line) = fs::prepare_write_fstab([$part]);
	append_to_file($fstab_file, $line) if $line;
    } else {
	if (!@$existing_fstab_entries) {
	    print STDERR "Not found in fstab\n" if $::testing;
	    return;
	}
	my ($s) = fs::prepare_write_fstab($fstab_, '', 'keep_smb_credentials');
	output($fstab_file, $s);
    }

    if ($::testing) {
	print "fstab would have changed:\n";
	system("diff -u /etc/fstab $fstab_file");
    }
}