perl-install/bootloader.pm


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package bootloader; # $Id$

use diagnostics;
use strict;
use vars qw(%vga_modes);

#-######################################################################################
#- misc imports
#-######################################################################################
use common qw(:common :file :functional :system);
use partition_table qw(:types);
use log;
use any;
use fsedit;
use loopback;
use commands;
use detect_devices;
use partition_table_raw;
use run_program;
use modules;


%vga_modes = (
 "Ask at boot" => 'ask',
 "Normal" => 'normal',
 "80x50" => '0x0f01',
 "80x43" => '0x0f02',
 "80x28" => '0x0f03',
 "80x30" => '0x0f04',
 "80x34" => '0x0f05',
 "80x60" => '0x0f06',
 "100x30" => '0x0122',
 "640x480 in 16 bits (FrameBuffer only)" => 785,
 "800x600 in 16 bits (FrameBuffer only)" => 788,
 "1024x768 in 16 bits (FrameBuffer only)" => 791,
 "1280x1024 in 16 bits (FrameBuffer only)" => 794,
);

my %vga_modes2nb = (
 'ask'    => -3,
 'normal' => -1,
#- other entries are identity
);


#-#####################################################################################
#- Functions
#-#####################################################################################

sub get {
    my ($kernel, $bootloader) = @_;
    $_->{kernel_or_dev} && $_->{kernel_or_dev} eq $kernel and return $_ foreach @{$bootloader->{entries}};
    undef;
}
sub get_label {
    my ($label, $bootloader) = @_;
    $_->{label} && $_->{label} eq $label and return $_ foreach @{$bootloader->{entries}};
    undef;
}

sub mkinitrd($$$) {
    my ($prefix, $kernelVersion, $initrdImage) = @_;

    $::testing || -e "$prefix/$initrdImage" and return;

    my $loop_boot = loopback::prepare_boot($prefix);

    modules::load('loop');
    run_program::rooted($prefix, "mkinitrd", "-f", $initrdImage, "--ifneeded", $kernelVersion) or unlink("$prefix/$initrdImage");

    loopback::save_boot($loop_boot);

    -e "$prefix/$initrdImage" or die "mkinitrd failed";
}

sub mkbootdisk($$$;$) {
    my ($prefix, $kernelVersion, $dev, $append) = @_;

    modules::load_multi(arch() =~ /sparc/ ? 'romfs' : (), 'loop');
    my @l = qw(mkbootdisk --noprompt); 
    push @l, "--appendargs", $append if $append;
    push @l, "--bios", 0, if $dev !~ /fd/;
    run_program::rooted($prefix, @l, "--device", "/dev/$dev", $kernelVersion) or die "mkbootdisk failed";
}

sub read($$) {
    my ($prefix, $file) = @_;
    my $global = 1;
    my ($e, $v, $f);
    my %b;
    foreach (cat_("$prefix$file")) {
	($_, $v) = /^\s*(.*?)\s*(?:=\s*(.*?))?\s*$/;

	if (/^(image|other)$/) {
	    push @{$b{entries}}, $e = { type => $_, kernel_or_dev => $v };
	    $global = 0;
	} elsif ($global) {
	    $b{$_} = $v || 1;
	} else {
	    if ((/map-drive/ .. /to/) && /to/) {
		$e->{mapdrive}{$e->{'map-drive'}} = $v;
	    } else {
		$e->{$_} = $v || 1;
	    }
	}
    }
    delete $b{timeout} unless $b{prompt};
    $_->{append} =~ s/^\s*"?(.*?)"?\s*$/$1/ foreach \%b, @{$b{entries}};
    $b{timeout} = $b{timeout} / 10 if $b{timeout};
    $b{message} = cat_("$prefix$b{message}") if $b{message};
    \%b;
}

sub suggest_onmbr($) {
    my ($hds) = @_;
    
    my $type = partition_table_raw::typeOfMBR($hds->[0]{device});
    !$type || member($type, qw(dos dummy lilo grub empty)), !$type;
}

sub compare_entries($$) {
    my ($a, $b) = @_;
    my %entries;

    @entries{keys %$a, keys %$b} = ();
    $a->{$_} eq $b->{$_} and delete $entries{$_} foreach keys %entries;
    scalar keys %entries;
}

sub add_entry($$) {
    my ($entries, $v) = @_;
    my (%usedold, $freeold);

    do { $usedold{$1 || 0} = 1 if $_->{label} =~ /^old ([^_]*)_/x } foreach @$entries;
    foreach (0..scalar keys %usedold) { exists $usedold{$_} or $freeold = $_ || '', last }

    foreach (@$entries) {
	if ($_->{label} eq $v->{label}) {
	    compare_entries($_, $v) or return; #- avoid inserting it twice as another entry already exists !
	    $_->{label} = "old${freeold}_$_->{label}";
	}
    }
    push @$entries, $v;
}

sub add_kernel($$$$$) {
    my ($prefix, $lilo, $kernelVersion, $specific, $v) = @_;
    my $ext = $specific && "-$specific"; $specific eq 'hack' and $specific = '';
    my ($vmlinuz, $image, $initrdImage) = ("vmlinuz-$kernelVersion$specific", "/boot/vmlinuz$ext", "/boot/initrd$ext.img");
    -e "$prefix/boot/$vmlinuz" or log::l("unable to find kernel image $prefix/boot/$vmlinuz"), return;
    {
	my $f = "initrd-$kernelVersion$specific.img";
	eval { mkinitrd($prefix, "$kernelVersion$specific", "/boot/$f") };
	undef $initrdImage if $@;
	symlinkf $f, "$prefix$initrdImage" or $initrdImage = "/boot/$f"
	  if $initrdImage;
    }
    symlinkf "$vmlinuz", "$prefix/$image" or $image = "/boot/$vmlinuz";
    add2hash($v,
	     {
	      type => 'image',
	      label => 'linux',
	      kernel_or_dev => $image,
	      initrd => $initrdImage,
	      append => $lilo->{perImageAppend},
	     });
    add_entry($lilo->{entries}, $v);
    $v;
}

sub configure_entry($$) {
    my ($prefix, $entry) = @_;
    if ($entry->{type} eq 'image') {
	my $specific_version;
	$entry->{kernel_or_dev} =~ /vmlinu.-(.*)/ and $specific_version = $1;
	readlink("$prefix/$entry->{kernel_or_dev}") =~ /vmlinu.-(.*)/ and $specific_version = $1;

	if ($specific_version) {
	    $entry->{initrd} or $entry->{initrd} = "/boot/initrd-$specific_version.img";
	    unless (-e "$prefix/$entry->{initrd}") {
		eval { mkinitrd($prefix, $specific_version, "$entry->{initrd}") };
		undef $entry->{initrd} if $@;
	    }
	}
    }
    $entry;
}

sub dev2prompath { #- SPARC only
    my ($dev) = @_;
    my ($wd, $num) = $dev =~ /^(.*\D)(\d*)$/;
    require c;
    $dev = c::disk2PromPath($wd) and $dev = $dev =~ /^sd\(/ ? "$dev$num" : "$dev;$num";
    $dev;
}

sub suggest {
    my ($prefix, $lilo, $hds, $fstab, $kernelVersion, $vga_fb) = @_;
    my $root_part = fsedit::get_root($fstab);
    my $root = isLoopback($root_part) ? "loop7" : $root_part->{device};
    my $boot = fsedit::get_root($fstab, 'boot')->{device};
    my $partition = first($boot =~ /\D*(\d*)/);

    require c; c::initSilo() if arch() =~ /sparc/;

    my ($onmbr, $unsafe) = $lilo->{crushMbr} ? (1, 0) : suggest_onmbr($hds);
    add2hash_($lilo, arch() =~ /sparc/ ?
	{
	 default => "linux",
	 entries => [],
	 timeout => 5,
	 use_partition => 0, #- we should almost always have a whole disk partition.
	 root          => "/dev/$root",
	 partition     => $partition || 1,
	 boot          => $root eq $boot && "/boot", #- this helps for getting default partition for silo.
	} :
	{
	 boot => "/dev/" . ($onmbr ? $hds->[0]{device} : fsedit::get_root($fstab, 'boot')->{device}),
	 bootUnsafe => $unsafe,
	 map => "/boot/map",
	 default => "linux",
	 lba32 => 1,
	 entries => [],
	 timeout => $onmbr && 5,
	 install => "/boot/boot.b",
	});
#- the following is not needed anymore with latest lilo
#-    $lilo->{disk} ||= "/dev/$hds->[0]{device} bios=0x80" if $hds->[0]{device} =~ /^hd[be]$/;

    if (!$lilo->{message} || $lilo->{message} eq "1") {
	$lilo->{message} = join('', cat_("$prefix/boot/message"));
	if (!$lilo->{message}) {
	    my $msg_en =
__("Welcome to %s the operating system chooser!

Choose an operating system in the list above or
wait %d seconds for default boot.

");
	    my $msg = translate($msg_en);
	    #- use the english version if more than 20% of 8bits chars
	    $msg = $msg_en if int(grep { $_ & 0x80 } unpack "c*", $msg) / length($msg) > 0.2;
	    $lilo->{message} = sprintf $msg, arch() =~ /sparc/ ? "SILO" : "LILO", $lilo->{timeout};
	}
    }

    my $isSecure = -e "$prefix/boot/vmlinuz-${kernelVersion}secure";

    my $isSMP = detect_devices::hasSMP();
    if ($isSMP && !-e "$prefix/boot/vmlinuz-${kernelVersion}smp") {
	log::l("SMP machine, but no SMP kernel found") unless $isSecure;
	$isSMP = 0;
    }
    add_kernel($prefix, $lilo, $kernelVersion, $isSecure ? 'secure' : $isSMP ? 'smp' : '',
	       {
		label => 'linux',
		root  => "/dev/$root",
		$vga_fb ? ( vga => $vga_fb) : (), #- using framebuffer
	       });
    add_kernel($prefix, $lilo, $kernelVersion, '',
	       {
		label => $isSecure || $isSMP ? 'linux-up' : 'linux-nonfb',
		root  => "/dev/$root",
	       }) if $isSecure || $isSMP || $vga_fb;
    add_kernel($prefix, $lilo, $kernelVersion, '',
	       {
		label => 'failsafe',
		root  => "/dev/$root",
	       })->{append} .= " failsafe" unless $lilo->{password};

    #- manage hackkernel if installed.
    my $hasHack = -e "$prefix/boot/vmlinuz-hack";
    if ($hasHack) {
	my $hackVersion = first(readlink("$prefix/boot/vmlinuz-hack") =~ /vmlinuz-(.*)/);
	add_kernel($prefix, $lilo, $hackVersion, 'hack',
		  {
		   label => 'hack',
		   root  => "/dev/$root",
		   $vga_fb ? ( vga => $vga_fb) : (), #- using framebuffer
		  }) if $hackVersion;
    }

    if (arch() =~ /sparc/) {