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package partition_table_raw;
use diagnostics;
use strict;
use common qw(:common :system :file);
use devices;
use c;
my @MBR_signatures = (
[ 'empty', 0, "\0\0\0\0" ],
[ 'lilo', 0x2, "LILO" ],
[ 'lilo', 0x6, "LILO" ],
[ 'osbs', 0x2, "OSBS" ], #- http://www.prz.tu-berlin.de/~wolf/os-bs.html
[ 'pqmagic', 0xef, "PQV" ],
[ 'BootStar', 0x130, "BootStar:" ],
[ 'DocsBoot', 0x148, 'DocsBoot' ],
[ 'system_commander', 0x1ad, "SYSCMNDRSYS" ],
[ 'Be Os', 0x24, 'Boot Manager' ],
[ 'TimO', 0, 'IBM Thinkpad hibernation partition' ],
[ 'os2', 0x1c2, "\xA" ],
[ 'dos', 0xa0, "\x25\x03\x4E\x02\xCD\x13" ],
[ 'dos', 0x60, "\xBB\x00\x7C\xB8\x01\x02\x57\xCD\x13\x5F\x73\x0C\x33\xC0\xCD\x13" ], #- nt's
[ 'freebsd', 0xC0, "\x00\x30\xE4\xCD\x16\xCD\x19\xBB\x07\x00\xB4" ],
[ 'dummy', 0xAC, "\x0E\xB3\x07\x56\xCD\x10\x5E\xEB" ], #- caldera?
[ 'ranish', 0x100, "\x6A\x10\xB4\x42\x8B\xF4\xCD\x13\x8B\xE5\x73" ],
);
sub typeOfMBR($) { typeFromMagic(devices::make($_[0]), @MBR_signatures) }
sub typeOfMBR_($) { typeFromMagic($_[0], @MBR_signatures) }
sub hasExtended { 0 }
sub cylinder_size($) {
my ($hd) = @_;
$hd->{geom}{sectors} * $hd->{geom}{heads};
}
#- defaults methods for adjusting start and end for partitions, these
#- methods will shrink the partition inside current limits, but think
#- of this: hidden extended partitions that contains logical ones are
#- not specified, so end is always almost above a cylinders boundaries
#- by the start of a logical partitions (sectors, ie 63 generally) inside
#- its hidden extended containers. so for adjustEnd, it is very important
#- to round_down to cylinder boundarie else partitions will overlap.
#- furthermore on the interface, choosing 1Mb more is possible that
#- will go again beyond the normal cylinders boundaries, which may
#- cause overlaping partitions again :-(
#- until all the code in diskdrake is not cleaned up perfectly, rounding
#- down for the end is necessary.
sub adjustStart($$) {
my ($hd, $part) = @_;
my $end = $part->{start} + $part->{size};
$part->{start} = round_up($part->{start},
$part->{start} % cylinder_size($hd) < 2 * $hd->{geom}{sectors} ?
$hd->{geom}{sectors} : cylinder_size($hd));
$part->{size} = $end - $part->{start};
}
sub adjustEnd($$) {
my ($hd, $part) = @_;
my $end = $part->{start} + $part->{size};
my $end2 = round_down($end, cylinder_size($hd));
unless ($part->{start} < $end2) {
$end2 = round_up($end, cylinder_size($hd));
}
$part->{size} = $end2 - $part->{start};
}
#- this method could be used for when partitions informations will be accurate.
#- sub adjustEnd($$) {
#- my ($hd, $part) = @_;
#- my $end = $part->{start} + $part->{size} - $hd->{geom}{sectors} - 1; #- magically reduces the end, will be rounded up.
#- my $end2 = round_up($end, cylinder_size($hd));
#- $end2 = $hd->{geom}{cylinders} * cylinder_size($hd) if $end2 > $hd->{geom}{cylinders} * cylinder_size($hd);
#- $part->{size} = $end2 - $part->{start};
#-}
sub get_geometry($) {
my ($dev) = @_;
my $g = "";
local *F; sysopen F, $dev, 0 or return;
ioctl(F, c::HDIO_GETGEO(), $g) or return;
my %geom; @geom{qw(heads sectors cylinders start)} = unpack "CCSL", $g;
$geom{totalcylinders} = $geom{cylinders};
{ geom => \%geom, totalsectors => $geom{heads} * $geom{sectors} * $geom{cylinders} };
}
sub openit($$;$) { sysopen $_[1], $_[0]{file}, $_[2] || 0; }
# cause kernel to re-read partition table
sub kernel_read($) {
my ($hd) = @_;
sync();
local *F; openit($hd, *F) or return 0;
sync(); sleep(1);
$hd->{rebootNeeded} = !ioctl(F, c::BLKRRPART(), 0);
sync();
close F;
sync(); sleep(1);
}
sub zero_MBR($) {
my ($hd) = @_;
# unless (ref($hd) =~ /partition_table/) {
my $type = arch() eq "alpha" ? "bsd" : arch() =~ /^sparc/ ? "sun" : "dos";
bless $hd, "partition_table_$type";
# }
$hd->{isDirty} = $hd->{needKernelReread} = 1;
$hd->{primary} = $hd->clear_raw();
delete $hd->{extended};
}
1;
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