diff options
Diffstat (limited to 'perl-install')
| -rw-r--r-- | perl-install/partition_table_sun.pm | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/perl-install/partition_table_sun.pm b/perl-install/partition_table_sun.pm new file mode 100644 index 000000000..5c8fc749f --- /dev/null +++ b/perl-install/partition_table_sun.pm @@ -0,0 +1,128 @@ +package partition_table_sun; + +use diagnostics; +use strict; +use vars qw(@ISA); + +@ISA = qw(partition_table_raw); + +use common qw(:common :system :file :functional); +use partition_table_raw; +use partition_table; +use c; + +#- very bad and rough handling :( +my %typeToDos = ( + 5 => 0, +); +my %typeFromDos = reverse %typeToDos; + +my ($main_format, $main_fields) = list2kv( + a128 => 'info', + a14 => 'spare0', + a32 => 'infos', + a246 => 'spare1', + n => 'rspeed', + n => 'pcylcount', + n => 'sparecyl', + a4 => 'spare2', + n => 'ilfact', + n => 'ncyl', + n => 'nacyl', + n => 'ntrks', + n => 'nsect', + a4 => 'spare3', + a64 => 'partitions', + n => 'magic', + n => 'csum', +); +$main_format = join '', @$main_format; + +my ($fields1, $fields2) = ([ qw(type flags) ], [ qw(start_cylinder size) ]); +my ($format1, $format2) = ("x C x C", "N N"); +my ($size1, $size2) = map { psizeof($_) } ($format1, $format2); +my $magic = 0xDABE; +my $nb_primary = 8; +my $offset = 0; + +sub read($$) { + my ($hd, $sector) = @_; + my $tmp; + + local *F; partition_table_raw::openit($hd, *F) or die "failed to open device"; + c::lseek_sector(fileno(F), $sector, $offset) or die "reading of partition in sector $sector failed"; + + sysread F, $tmp, psizeof($main_format) or die "error while reading partition table in sector $sector"; + my %info; @info{@$main_fields} = unpack $main_format, $tmp; + + #- check magic number + $info{magic} == $magic or die "bad magic number"; + + @{$hd->{geom}}{qw(cylinders heads sectors)} = @info{qw(ncyl nsect ntrks)}; + + #- TODO verify checksum + my @pt = mapn { + my %h; + @h{@$fields1} = unpack $format1, $_[0]; + @h{@$fields2} = unpack $format2, $_[1]; + $h{start} = $sector + $h{start_cylinder} * partition_table::cylinder_size($hd); + $h{type} = $typeToDos{$h{type}} || $h{type}; + $h{size} or $h{$_} = 0 foreach keys %h; + \%h; + } [ $info{infos} =~ /(.{$size1})/g ], [ $info{partitions} =~ /(.{$size2})/g ]; + + [ @pt ], \%info; +} + +# write the partition table (and extended ones) +# for each entry, it uses fields: start, size, type, active +sub write($$$;$) { + my ($hd, $sector, $pt, $info) = @_; + + local *F; partition_table_raw::openit($hd, *F, 2) or die "error opening device $hd->{device} for writing"; + c::lseek_sector(fileno(F), $sector, $offset) or return 0; + + #- TODO compute checksum + + ($info->{infos}, $info->{partitions}) = map { join '', @$_ } list2kv map { + $_->{start} % partition_table::cylinder_size($hd) == 0 or die "partition not at beginning of cylinder"; + local $_->{type} = $typeFromDos{$_->{type}} || $_->{type}; + local $_->{start_cylinder} = $_->{start} / partition_table::cylinder_size($hd) - $sector; + pack($format1, @$_{@$fields1}), pack($format2, @$_{@$fields2}); + } @$pt; + + syswrite F, pack($main_format, @$info{@$main_fields}), psizeof($main_format) or return 0; + + 1; +} + +sub info { + my ($hd) = @_; + my $dtype_scsi = 4; #- taken from fdisk, removed unused one, + my $dtype_ST506 = 6; #- see fdisk for more + + { + magic => $magic, + magic2 => $magic, + dtype => $hd->{device} =~ /^sd/ ? $dtype_scsi : $dtype_ST506, + secsize => $common::SECTORSIZE, + ncylinders => $hd->{geom}{cylinders}, + secpercyl => partition_table::cylinder_size($hd), + secprtunit => $hd->{geom}{totalsectors}, + rpm => 3600, + interleave => 1, + trackskew => 0, + cylskew => 0, + headswitch => 0, + trkseek => 0, + bbsize => 8192, #- size of boot area, with label + sbsize => 8192, #- max size of fs superblock + }; +} + +sub clear_raw { + my ($hd) = @_; + { raw => [ ({}) x $nb_primary ], info => info($hd) }; +} + +1; |