#!/usr/bin/perl

if (shift(@ARGV) ne '-f') {
    print "Call it with option -f, but don't fear loosing all your data, this command is dangerous!";
    print "
usage: /etc/oem -f [options]
where [options] are:
    server                          : allow server installalation
    boot_entries=entry1,...,entryN  : set boot entries to use,
                                      the first one is the default one
    no<option>                      : disable options <option>
";
    exit 1;
}
my (%options, $yes, $hd, $hdp, $cd, $fs);

#- avoid globing as it is not available in rescue ramdisk.
foreach my $device (split ' ', `/bin/ls -d /proc/ide/hd*`) {
    open F, "$device/media" or next;
    foreach (<F>) {
	/disk/  and do { $hd ||= $device; $hd =~ s,/proc/ide/,,; };
	/cdrom/ and do { $cd ||= $device; $cd =~ s,/proc/ide/,,; };
    }
    close F;
}
#- examine available SCSI devices (avoid SCSI floppies like LS-120 or ZIP disk or generic floppies).
eval {
    system "/usr/bin/drvinst"; #- load scsi drivers else it wont do anything.

    my ($driveNum, $cdromNum) = (0, 0);
    open F, "/proc/scsi/scsi" or die "no scsi available";
    local $_ = <F>; /^Attached devices:/ or die "to attached devices found";
    while ($_ = <F>) {
	my ($id) = /^Host:.*?Id: (\d+)/ or die "no host found";
	$_ = <F>; my ($vendor, $model) = /^\s*Vendor:\s*(.*?)\s+Model:\s*(.*?)\s+Rev:/ or die "no vendor nor model found";
	$_ = <F>; my ($type) = /^\s*Type:\s*(.*)/;
	if ($type =~ /Direct-Access/ && $model !~ /ZIP\s+\d+|LS-?120|144MB|[Ff]loppy/) {
	    $hd ||= "sd" . chr($driveNum++ + ord('a'));
	} elsif ($type =~ /CD-ROM/) {
	    $cd ||= "scd" . $cdromNum++;
	}
    }
    close F;
};
#- examine DAC960 device.
#- there is a problem as there is no more than 7 partitions available, this means no /home and no /var.
unless ($hd) {
    local $_;
    open F, "dmesg |";
    while (<F>) {
	m|/dev/(rd/.*?): .*?,| and $hd ||= $1, last;
    }
    close F;
    if ($hd) {
	my ($c_id, $d_id) = $hd =~ m|rd/c(\d+)d(\d+)|;
	-d "/dev/rd" or mkdir "/dev/rd";
	system "mknod", "/dev/$hd", "b", 48+$c_id, 8*$d_id;
	foreach (1..7) {
	    system "mknod", "/dev/${hd}p$_", "b", 48+$c_id, 8*$d_id+$_;
	}
	$hdp = $hd . 'p';
    }
}
#- examine Compaq Smart Array device.
unless ($hd) {
    foreach ('array/ida', 'cpqarray/ida', 'cciss/cciss') {
	my $prefix = "/proc/driver/$_"; #- kernel 2.4 places it here
	$prefix = "/proc/$_" if !-e "${prefix}0"; #- kernel 2.2

	my ($name) = m|/(.*)|;
	for (my $i = 0; -r ($f = "${prefix}$i"); $i++) {
	    local $_;
	    open F, $f;
	    while (<F>) {
		if (m|^\s*($name/.*?):|) {
		    $hd ||= $1;
		}
	    }
	    close F;
	}
    }
    if ($hd) {
	my ($type, $c_id, $d_id) = $hd =~ m,(ida|cciss)/c(\d+)d(\d+),;
	-d "/dev/$type" or mkdir "/dev/$type";
	system "mknod", "/dev/$hd", "b", ($type eq 'ida' ? 72 : 104)+$c_id, 16*$d_id;
	foreach (1..15) {
	    system "mknod", "/dev/${hd}p$_", "b", ($type eq 'ida' ? 72 : 104)+$c_id, 16*$d_id+$_;
	}
	$hdp = $hd . 'p';
    }
}
$hd && -e "/dev/$hd" or die "unable to access hard disk";
print "hd: $hd\ncd: $cd\n";
$hdp ||= $hd;

#- try to free any reference to hard disk which will be used (as in rescue mode it has already loaded
#- existing partition in /mnt.
open F, "/proc/mounts";
while (<F>) {
    /$hdp(\d*)\s+(\S+)/ and $already_mounted{$2} = "$hdp$1";
}
foreach (sort { $b cmp $a } keys %already_mounted) {
    print "umounting $already_mounted{$_} from $_\n"; 
    system "umount", $_;
}
    
#- find a cdrom (like) image, normally a true cdrom but if nfs install is running, use it instead.
mkdir "/cdrom";
open F, "/proc/cmdline";
while (<F>) {
    /automatic=method:nfs,.*server:([^\s,]*),.*directory:([^\s,]*)/
      and system "mount", "-r", "-t", "nfs", "$1:$2", "/cdrom", "-o", "nolock";
}
close F;
unless (-e "/cdrom/VERSION") {
    -e "/dev/$cd" or die "unable to access local cdrom";
    system "mount", "-r", "-t", "iso9660", "/dev/$cd", "/cdrom";
}

#- using default options for HP.
#$options{free_size} = 500;
#$options{free_primary} = 1;
#$options{free_fs} = 'fat32';
#$options{boot_entries} = 'linux,linux-nonfb,restore,failsafe,floppy';
#$options{kernel} = "acpi=off";

open F, "/cdrom/VERSION" or die "no installation cdrom found on $cd";
while (<F>) {
    /\[boot_entries[=:]([^]]*)\]/ and $options{boot_entries} = $1;
    /\[ext2\]/ and $options{fs} = "ext2";
    /\[ext3\]/ and $options{fs} = "ext3";
}
close F;
foreach (@ARGV) { /^([^=:]*)[=:]?(.*)/ and $options{$1} = $2; /^no([^=:]*)/ and delete $options{$1} }

foreach (keys %options) {
    print "Using option [$_" . ($options{$_} && "=$options{$_}") . "]\n";
}

#- filesystem to use.
$fs ||= $options{fs} || "ext3";
$fs eq "ext3" and system "modprobe", "ext3";
print "Using filesystem of type $fs\n";

#- check for already existing partition table, if none are found
#- create 3 partitions (one for install, one for swap and one for root).
#- if only a fat partition is found, resize it do include the above partition.
#- other combination are really dangerous and are not supported, ask
#- the user that all data on the disk will be erased and go on.
my ($heads, $sectors, $cylinders, $hd_size, @hd_parts);
sub correct_start_end {
    my ($rstart, $end, $keep_start) = @_;
    my ($cylinder_size, $c_start, $c_end) = ($sectors*$heads*512/1024/1024, undef, undef);
    if (abs($cylinder_size*$cylinders-$hd_size)/$hd_size < 0.01) {
	$c_start = $$rstart+($keep_start ? 0 : $cylinder_size/$heads);
	$c_end = $cylinder_size*int(1/2+$end/$cylinder_size);
	$c_end > $hd_size and $c_end = $hd_size;
	$$rstart = $c_end;
    } else {
	$c_start = $$rstart;
	$c_end = $end;
	$c_end > $hd_size and $c_end = $hd_size;
	$$rstart = $c_end+5; #- fall back to use a problable safe method.
    }
    $c_start >= $c_end and die "no space left for partitionning\n";
    ($c_start, $c_end);
}
open F, "fdisk -l /dev/$hd |";
while (<F>) {
    /(\d+)\s*heads/ and $heads = $1;
    /(\d+)\s*sectors/ and $sectors = $1;
    /(\d+)\s*cylinders/ and $cylinders = $1;
}
if ($heads == 1 && $cylinders == 1) {
    $cylinders = $sectors / 255 / 63;
    $heads = 255;
    $sectors = 63;
}
close F;
for (1..2) {
    open F, "parted /dev/$hd -s print |";
    while (<F>) {
	/^Disk geometry [^:]*:\s*([\d\.]+)-([\d\.]+)/ and do { $hd_size = $2 - $1 - 1 };
	#/^Disk label type:\s*msdos/ and do { $hd_type = 'msdos' };
	/^(\d+)\s+([\d\.]+)\s+([\d\.]+)\s+(primary|logical|extended)\s*(\S*)/ and do {
	    #- this automatically drops extended partition here!
	    push @hd_parts, { minor => $1, start => $2, end => $3, type => $4, fstype => $5 };
	};
    }
    close F;
    $hd_size and last;
    print "Unable to detect partition on disk, trying with new label\n";
    do {
	print "

I'm going to install the OEM version on your hard drive
!!ALL DATA WILL BE LOST!!

Type \`\`yes'' and [enter] to go on\n"
    } while (($yes = <STDIN>) !~ /^\s*yes\s*$/i);
    system "parted", "/dev/$hd", "mklabel", "msdos";
}
my $min_size = $options{min_size} || 9000;
my $def_size = $options{def_size} || 8500;
my $trigger_size = $options{trigger_size} || 9000;
#my $inst_size = $options{inst_size} || 1500;
my $inst_size = $options{inst_size} || 5000;
my $swap_size = $options{swap_size} || 128;
$hd_size > $min_size or die "hard disk is too small to contain oem install (${hd_size}MB found, need $min_size at least)";

my ($fat_pos, $resize_fat_size, $root_size);
if (@hd_parts == 1 && $hd_parts[$fat_pos = 0]{fstype} eq 'FAT' ||
    @hd_parts == 2 && $hd_parts[0]{type} eq 'primary' && $hd_parts[$fat_pos = 1]{fstype} eq 'FAT' ||
    @hd_parts == 3 && $hd_parts[0]{type} eq 'primary' && $hd_parts[1]{type} eq 'primary' && $hd_parts[$fat_pos = 2]{fstype} eq 'FAT' ||
    @hd_parts == 2 && $hd_parts[0]{type} eq 'extended' && $hd_parts[$fat_pos = 1]{fstype} eq 'FAT' ||
    @hd_parts == 3 && $hd_parts[0]{type} eq 'extended' && $hd_parts[1]{type} eq 'primary' && $hd_parts[$fat_pos = 5]{fstype} eq 'FAT') {
    if ($hd_size - $hd_parts[$fat_pos]{end} > $min_size + $options{free_size}) {
	#- check first if there are some available space left on the disk.
	#- so we are using it, root_size is fixed to match hard disk size.
	$resize_fat_size = 0;
	$root_size = $hd_size - $hd_parts[$fat_pos]{end} - $options{free_size} - $inst_size - $swap_size;
	$root_size > $trigger_size and $root_size = $def_size;
    } elsif ($hd_size > 2*$min_size + $options{free_size}) {
	#- resize this fat partition.
	$resize_fat_size = 0.5 * $hd_size;
	$root_size = $hd_size - $resize_fat_size - $options{free_size} - $inst_size - $swap_size;
	$root_size > $trigger_size and $root_size = $def_size;
    }
}
unless ($root_size) {
    #- there have not been defined above, so remove everything and start from
    #- a blank partition.
    $resize_fat_size = undef;
    $root_size = $hd_size - $resize_fat_size - $options{free_size} - $inst_size - $swap_size;
    $root_size > $trigger_size and $root_size = $def_size;
}

#- launch parted to edit partition table, start at minor.
#- point define where we start.
my $minor = defined $resize_fat_size && $hd_parts[0]{type} eq 'extended' ? 6 : 5;
my $point = 0.0;
my @commands;

if (defined $resize_fat_size) {
    do {
	print "

!!An existing Windows partition has been found and will be kept.
Additional Linux partitions will be created!!

Type \`\`yes'' and [enter] to go on\n"
    } while (($yes = <STDIN>) !~ /^\s*yes\s*$/i);
    #- keep the current partition table, and try to resize the fat partition
    #- if the size is not 0.
    #- KEEP IN MIND there is only one partition defined.
    if ($resize_fat_size) {
	$point = $hd_parts[$fat_pos]{start};
	push @commands, sprintf "resize %d %s %s", $hd_parts[$fat_pos]{minor}, correct_start_end(\$point, $point+$resize_fat_size, 'keepstart');
    } else {
	$point = $hd_parts[$fat_pos]{end};
    }
    $point+=9; #- keep blank space between partitions if parted cannot handle partition table correctly.
} else {
    unless (defined $yes) {
	do {
	    print "

I'm going to install the OEM version on your hard drive
!!ALL DATA WILL BE LOST!!

Type \`\`yes'' and [enter] to go on\n"
        } while (($yes = <STDIN>) !~ /^\s*yes\s*$/i);
    }
    #- build a new disk label here.
    push @commands, "mklabel msdos";
}

#- at this point, the partition are created.
my ($instz, $inst, $swap, $root, $var, $home, $free) = ($minor-1, $minor, $minor+1, $minor+2, undef, undef, undef);

#- all linux partition are stored inside an extended partition, this is easier to manipulate after.
my $free_point = $point;
if ($minor == 5) {
    push @commands, sprintf "mkpart extended %s %s", correct_start_end(\$free_point, $hd_size - ($options{free_primary} && $options{free_size}),
							  'keepstart');
} else {
    $hd_parts[0]{type} eq 'extended' or die "first partition assumed to be extended";
    $point = $hd_parts[0]{start};
    push @commands, sprintf "resize %s %s %s", $hd_parts[0]{minor}, correct_start_end(\$free_point,
									$hd_size - ($options{free_primary} && $options{free_size}),
									'keepstart');
}
push @commands, sprintf "mkpart logical ext2 %s %s", correct_start_end(\$point, $point+$inst_size);
push @commands, sprintf "mkpart logical linux-swap %s %s", correct_start_end(\$point, $point+$swap_size);
push @commands, sprintf "mkpart logical %s %s %s", $fs, correct_start_end(\$point, $point+$root_size);
if (exists $options{server} && $hd !~ /^rd\//) {
    my $var_size = ($hd_size - $point) / 2;
    if ($var_size > 1500) {
	$var = $root+1;
	push @commands, sprintf "mkpart logical %s %s %s", $fs, correct_start_end(\$point, $point+$var_size);
    }
}
if ($hd_size - $point - $options{free_size} > 100 && $hd !~ /^rd\//) {
    $home = ($var || $root) + 1;
    push @commands, sprintf "mkpart logical %s %s %s", $fs, correct_start_end(\$point, $hd_size-$options{free_size});
}
if ($options{free_size} && $options{free_fs}) {
    if ($options{free_primary}) {
	$free = scalar(grep { $_->{type} eq 'primary' } @hd_parts) + 2;
	if ($free > 4) {
	    $free = ($home || $var || $root) + 1;
	    delete $options{free_primary};
	    print "Unable to use primary partition for free partition, using logical partition.\n";
	}
    } else {
	$free = ($home || $var || $root) + 1;
    }
    push @commands, sprintf "mkpart %s %s %s %s", $options{free_primary} ? 'primary' : 'logical', $options{free_fs}, correct_start_end($options{free_primary} ? \$free_point : \$point, $hd_size);
}
system("parted", "-s", "/dev/$hd", @commands) == 0 or die "unable to partition the disk $hd";

#- try to help user if a free space has been set and no fs defined for it.
if ($options{free_size} && !$options{free_fs}) {
    print "

!!A free space has been configured, now you can use parted
to defined the partition as you want.

Type \`\`quit'' and [enter] to finish parted\n";
    system "parted", "-i", "/dev/$hd";
}

#- we have to build swap and mount it.
print "Setting swap\n";
system "mkswap", "/dev/$hdp$swap";
system "swapon", "/dev/$hdp$swap";

#- we have to format using right fs.
print "Formatting /dev/$hdp$inst partition\n";
mkfs("ext2", "/dev/$hdp$inst");
print "Formatting /dev/$hdp$root partition\n";
mkfs($fs, "/dev/$hdp$root");
if ($var) {
    print "Formatting /dev/$hdp$var partition\n";
    mkfs($fs, "/dev/$hdp$var");
}
if ($home) {
    print "Formatting /dev/$hdp$home partition\n";
    mkfs($fs, "/dev/$hdp$home");
}
if ($free) {
    print "Formatting /dev/$hdp$free partition\n";
    mkfs($options{free_fs}, "/dev/$hdp$free");
}

print "Mounting partitions\n";
mkdir "/hd";
system "mount", "-t", "ext2", "/dev/$hdp$inst", "/hd";
mkdir "/mnt";
system "mount", "-t", $fs, "/dev/$hdp$root", "/mnt";
if ($var) {
    mkdir "/mnt/var";
    system "mount", "-t", $fs, "/dev/$hdp$var", "/mnt/var";
}
if ($home) {
    mkdir "/mnt/home";
    system "mount", "-t", $fs, "/dev/$hdp$home", "/mnt/home";
}

print "Copying installation on hard drive\n";
mkdir "/hd/boot";
if (-e "/cdrom/oem/vmlinuz" && -e "/cdrom/oem/all.rdz") {
    system "cp", "-a", "/cdrom/oem/vmlinuz", "/hd/boot/vmlinuz";
    system "cp", "-a", "/cdrom/oem/all.rdz", "/hd/boot/all.rdz";
} elsif (-e "/cdrom/isolinux/alt0/vmlinuz" && -e "/cdrom/isolinux/alt0/all.rdz") {
    system "cp", "-a", "/cdrom/isolinux/alt0/vmlinuz", "/hd/boot/vmlinuz";
    system "cp", "-a", "/cdrom/isolinux/alt0/all.rdz", "/hd/boot/all.rdz";
} elsif (-e "/cdrom/boot/vmlinuz" && -e "/cdrom/boot/hd.rdz") {
    system "cp", "-a", "/cdrom/boot/vmlinuz", "/hd/boot/vmlinuz";
    system "cp", "-a", "/cdrom/boot/hd.rdz", "/hd/boot/all.rdz";
} elsif (-e "/cdrom/images/hd.img") {
    mkdir "/tmp/hd";
    system "modprobe", "loop";
    system "modprobe", "vfat";
    system "mount", "-t", "vfat", "/cdrom/images/hd.img", "/tmp/hd", "-o", "loop";
    system "cp", "-a", "/tmp/hd/vmlinuz", "/hd/boot/vmlinuz";
    system "cp", "-a", "/tmp/hd/hd.rdz", "/hd/boot/all.rdz";
    system "umount", "/tmp/hd";
} else {
    die "no installation stage1 found";
}

mkdir "/hd/Mandrake";
mkdir "/hd/Mandrake/RPMS";
system "cp", "-a", "/cdrom/VERSION", "/hd";
system "cp", "-a", "/cdrom/Mandrake/base", "/cdrom/Mandrake/mdkinst", "/cdrom/Mandrake/share", "/hd/Mandrake";

if (open F, ">/hd/Mandrake/oem_patch.pl") {
    print "Setting OEM specific extension to DrakX\n";
    if (exists $options{server}) {
	print F q{
	    use install_steps;
	    package install_steps;
	    undef *choosePackages;
	    *choosePackages = sub {
		my ($o, $packages, $compssUsers, $first_time) = @_;

		#- make sure we kept some space left for available else the system may
		#- not be able to start (xfs at least).
		my $available = install_any::getAvailableSpace($o);
		my $availableCorrected = pkgs::invCorrectSize($available / sqr(1024)) * sqr(1024);

		#- avoid destroying user selection of packages but only
		#- for expert, as they may have done individual selection before.
	        install_any::unselectMostPackages($o);

		#- use specific OEM packages selection, go to level 5
		#- and disable some extension.
		$o->{compssUsersChoice}{$_} = 0 foreach 'GNOME';
		$o->{compssUsersChoice}{$_} = 0 
		    foreach map { @{$o->{compssUsers}{$_}{flags}} } 'Workstation|Office Workstation', 'Workstation|Internet station';
		$o->{compssListLevel} = 5;
	        pkgs::setSelectedFromCompssList($packages, $o->{compssUsersChoice}, $o->{compssListLevel}, $availableCorrected);

		$availableCorrected;
	    };
	};
    } else {
	print F q{
	    use install_steps;
	    package install_steps;
	    undef *choosePackages;
	    *choosePackages = sub {
		my ($o, $packages, $compssUsers, $first_time) = @_;

		#- make sure we kept some space left for available else the system may
		#- not be able to start (xfs at least).
		my $available = install_any::getAvailableSpace($o);
		my $availableCorrected = pkgs::invCorrectSize($available / sqr(1024)) * sqr(1024);

		#- avoid destroying user selection of packages but only
		#- for expert, as they may have done individual selection before.
	        install_any::unselectMostPackages($o);

		#- use specific OEM packages selection, go to level 4.
		#- and select at least GAMES group, everything else has
		#- already be selected during master preparation.
		$o->{compssListLevel} = 4;
		$o->{compssUsersChoice}{$_} = 1 foreach qw(GAMES VIDEO AUDIO GRAPHICS);
	        pkgs::setSelectedFromCompssList($packages, $o->{compssUsersChoice}, $o->{compssListLevel}, $availableCorrected);

		$availableCorrected;
	    };
	};
    }
    if ($options{boot_entries}) {
	print "Setting OEM specific extension for boot entries\n";
	print F q{
	    my $sorted_entries = q(} . $options{boot_entries} . q{); #- insert boot_entries options here as string q(...).
	    my $old_setupBootloaderBefore = \&setupBootloaderBefore;
	    undef *setupBootloaderBefore;
	    *setupBootloaderBefore = sub {
		$old_setupBootloaderBefore->(@_);
		my @entries = split ',', $sorted_entries;
		my @result_entries;
		foreach my $p (@entries) {
		    foreach (@{$_[0]{bootloader}{entries}}) {
			$_->{label} eq $p and push @result_entries, $_;
		    }
		}
		if (@result_entries) {
		    $_[0]{bootloader}{entries} = \@result_entries;
		    $_[0]{bootloader}{default} = $result_entries[0]{label}; #- first image is default.
		}
	    };
	};
    }
    close F;
}

print "Setting bootloader\n";
mkdir "/hd/boot/grub";
foreach (1..2) {
    -e "/hd/boot/grub/stage$_" or system "cp", "-a", "/boot/grub/stage$_", "/hd/boot/grub";
}
open F, ">/hd/boot/grub/menu.lst";
if (defined $resize_fat_size) {
    print F "timeout 5\n";
    print F "color black/cyan yellow/cyan\n\n";
    print F "title linux\n";
} else {
    print F "timeout 0\n\n";
    print F "title oem\n";
}
print F "kernel (hd0,$instz)/boot/vmlinuz ramdisk_size=128000 $options{kernel} automatic=method:disk,disk:$hd,partition:$hdp$inst,directory:/ hd vga=788 fbeginner oem defcfg=/tmp/hdimage/Mandrake/oem_patch.pl\n";
print F "initrd (hd0,$instz)/boot/all.rdz\n";
#- if a windows partition is available, add an entrie for it.
if (defined $resize_fat_size) {
    print F "\ntitle windows\n";
    printf F "rootnoverify (hd0,%s)\n", $hd_parts[$fat_pos]{minor}-1;
    print F "makeactive\n";
    print F "chainloader +1\n";
}
close F;
open F, ">/hd/boot/grub/device.map";
print F "(hd0) /dev/$hd\n";
close F;
open F, "| grub --device-map=/hd/boot/grub/device.map --batch";
print F "install (hd0,$instz)/boot/grub/stage1 d (hd0) (hd0,$instz)/boot/grub/stage2 p (hd0,$instz)/boot/grub/menu.lst\n";
print F "quit\n";
close F or die "error while executing grub";

my $packages = read_depslist("/cdrom/Mandrake/base/depslist.ordered");

my @media;
open F, "/cdrom/Mandrake/base/hdlists";
foreach (<F>) {
    chomp;
    s/\s*#.*$//;
    /^\s*$/ and next;
    m/^\s*(hdlist\S*\.cz2?)\s+(\S+)\s*(.*)$/ or die "invalid hdlist description \"$_\" in hdlists file";

    push @media, { hdlist => $1, rpmsdir => $2, descr => $3 };
}
close F;

#- initialize installation.
foreach (qw(/etc /etc/sysconfig /etc/rpm /var /var/lib /var/lib/rpm /var/log /proc)) {
    mkdir "/mnt/$_";
}
system "mount", "-t", "proc", "proc", "/mnt/proc";
open F, ">/mnt/etc/fstab";
print F "/dev/$hdp$root / $fs defaults 1 1\n";
if ($var) {
    print F "/dev/$hdp$var /var $fs defaults 1 2\n";
}
if ($home) {
    print F "/dev/$hdp$home /home $fs defaults 1 2\n";
}
close F;
#- stupid things for installer to work correctly.
#open F, ">/mnt/etc/mandrake-release";
#print F "Mandrake Linux release 9.1 (Bamboo) for i586";
#close F;

#- keep in mind all the rpm files available (according to hdlists).
my (%files, %rpms);

require packdrake;
foreach my $medium (@media) {
    my $packer = new packdrake("/cdrom/Mandrake/base/$medium->{hdlist}");
    foreach (@{$packer->{files}}) {
	$packer->{data}{$_}[0] eq 'f' or next;
	my ($fullname, $file) = /([^:]*):(.*)/ ? ($1, "$2.rpm") : ($_, "$_.rpm");
	$files{$fullname} = $file;
	$rpms{$fullname} = $medium->{rpmsdir};
	#- convert %{ARCH} to effective arch of the given package.
	my ($arch) = $fullname =~ /\.([^\.\-]*)$/;
	$rpms{$fullname} =~ s|%{ARCH}|$arch|g;
    }
}

#- install some important packages.
system "rpm", "--root", "/mnt", "--initdb";

#- copy and install from each cd image.
foreach my $medium (@media) {
    my $rpmsidr = $medium->{rpmsdir};
    $rpmsdir =~ s|%{ARCH}.*||; #- only for checking directory presence...
    while ($cd && ! -d "/cdrom/$rpmsdir") {
	system "unmount", "/dev/$cd";
	system "eject", "/dev/$cd";
	print "Please insert the cdrom labeled \"$medium->{descr}\"\n  and press [enter] when done\n";
	$yes = <STDIN>;
	system "mount", "-r", "-t", "iso9660", "/dev/$cd", "/cdrom";
    }

    print "Copying packages from medium labeled \"$medium->{descr}\" to hard disk\n";
    foreach my $pkg (@{$packages->{depslist}}) {
	$files{rpm_fullname($pkg)} or next;
	my $infile = "/cdrom/" . $rpms{rpm_fullname($pkg)} . "/" . $files{rpm_fullname($pkg)};
	my $outfile = "/hd/" . $rpms{rpm_fullname($pkg)} . "/" . $files{rpm_fullname($pkg)};
	if (-r $infile && -s $infile != -s $outfile) {
	    -d "/hd/" . $rpms{rpm_fullname($pkg)} or system "mkdir", "-p", "/hd/" . $rpms{rpm_fullname($pkg)};
	    print "  copying " . rpm_fullname($pkg) . "\n";
	    system "cp", "-a", $infile, $outfile;
	    if (rpm_fullname($pkg) =~ /mandrake-release/) {
		system "rpm", "-Uvh", "--root", "/mnt", "--nodeps", "--force", $outfile;
	    }
	    #- clean to say everything is done.
	    delete $files{rpm_fullname($pkg)};
	    delete $rpms{rpm_fullname($pkg)};
	}
    }
}

#- try to figure out if a oem-message-graphic already exists.
#- if this is the case, rename it to /mnt/boot/message-graphic
if (-e "/cdrom/Mandrake/base/oem-message-graphic") {
    print "Using specific oem graphic image\n";
    if (-e "/mnt/boot/message-graphic") {
	rename "/mnt/boot/message-graphic", "/mnt/boot/message-graphic.old";
	system "cp", "-a", "/cdrom/Mandrake/base/oem-message-graphic", "/mnt/boot/message-graphic";
    } elsif (-e "/mnt/boot/lilo-graphic/message") {
	rename "/mnt/boot/lilo-graphic/message", "/mnt/boot/lilo-graphic/message.old";
	system "cp", "-a", "/cdrom/Mandrake/base/oem-message-graphic", "/mnt/boot/lilo-graphic/message";
    }
}

#- clean all initrd image which may have been built.
system "rm -f /mnt/boot/initrd*";

system "umount", "/mnt/proc";
$home and system "umount", "/mnt/home";
$var and system "umount", "/mnt/var";
system "umount", "/mnt";
system "umount", "/hd";
system "umount", "/cdrom";

$cd and system "eject", "/dev/$cd";

print "
Done. OEM hard drive ready!
The hard drive is now ready for a customer.
System is now halted.\n\n";

system "halt";

#- gives way to format partition (simpler approach)
sub mkfs {
    my ($fs, $dev) = @_;
    for ($fs) {
	/ext2/ and do { system "mkfs.ext2", $dev;
			next };
	/ext3/ and do { system "mkfs.ext2", "-j", $dev;
			system "tune2fs", "-c0", "-i0", $dev;
			next };
	/fat16/ and do { system "mkdosfs", $dev;
			 next };
	/fat32/ and do { system "mkdosfs", "-F", "32", $dev;
			 next };
	die "unknown fs: $_\n";
    }
}

sub chop_version {
    ($_[0] =~ /^([^:\s]*)-[^:\-\s]+-[^:\-\s]+\.[^:\.\-\s]*(?::\S*)?/)[0] || die "unable to parse $_[0]";
}
sub rpm_fullname {
    ($_[0]{name} =~ /^([^:\s]*-[^:\-\s]+-[^:\-\s]+\.[^:\.\-\s]*)(?::\S*)?/)[0] || die "unable to parse $_[0]";
}

sub read_depslist {
    my ($file) = @_;
    my $packages = { depslist => [], names => {} };

    #- read depslist.oredered file.
    my $id = 0;

    open F, "$file" or die "unable to open ordered dependencies list file";
    while (<F>) {
	my ($name, $size, @deps) = split;
	push @{$packages->{depslist}}, { id => $id++, name => $name, size => $size, deps => \@deps };
    }
    close F;

    foreach (@{$packages->{depslist}}) {
	$packages->{names}{chop_version($_->{name})} = $_;
    }

    print "read " . scalar(@{$packages->{depslist}}) . " package dependancies\n";
    $packages;
}