Update grub from 2.00 to 2.02

[david]

needed, because of problems between grub2.00 and xfsprogs4.12

[pmenzel]

Just for the archive, mxgrub only calls cmd_install if you run mxgrub <name> (no switch), and GRUB is not yet installed on the root device ($mbr_type ne 'GRUB').

sub cmd_install {
        my ($label)=@_;         #

        is_VX50() and die "This is a VX50, I refuse to install grub here\n";

        if ($label eq 'default') {
                scan_mariux(0);
                $found_default or exit 1;
        } else {
                scan_mariux(0,$label);
                $found_chosen or exit 1;
        }

        update_grub_cfg();

        my ($root_device,$root_disk)=root_dev();
        my $mbr_type=check_mbr($root_disk);
        if ($mbr_type ne 'GRUB') {
                sys 'grub-install',$root_disk and exit 1;
        }

        if ($label eq 'default') {
                sys('grub-editenv','-','set',"chosen=$MARIUX_DEFAULT");
        } else {
                sys('grub-editenv','-','set',"chosen=$label");
        }
}

[donald]

Can we read the grub-version from the mbr in check_mbr? Then we could keep that logic and call grub-install if an update is required.