README-autoirpm-icons


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This package is to be used with autoirpm package.
It provides menu icons for non installed apps that should take advantages of
autoirpm features.

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package partition_table; # $Id$

use diagnostics;
use strict;

use common;
use fs::type;
use partition_table::raw;
use detect_devices;
use fs::type;
use log;

our @fields2save = qw(primary extended totalsectors isDirty will_tell_kernel);


#- works for both hard drives and partitions ;p
sub description {
    my ($hd) = @_;
    my $win = $hd->{device_windobe};

    sprintf "%s%s (%s%s%s%s)", 
      $hd->{device}, 
      $win && " [$win:]", 
      formatXiB($hd->{totalsectors} || $hd->{size}, 512),
      $hd->{info} && ", $hd->{info}",
      $hd->{mntpoint} && ", " . $hd->{mntpoint},
      $hd->{fs_type} && ", $hd->{fs_type}";
}

sub isPrimary {
    my ($part, $hd) = @_;
    foreach (@{$hd->{primary}{raw}}) { $part eq $_ and return 1 }
    0;
}

sub adjustStartAndEnd {
    my ($hd, $part) = @_;

    $hd->adjustStart($part);
    $hd->adjustEnd($part);
}

sub verifyNotOverlap {
    my ($a, $b) = @_;
    $a->{start} + $a->{size} <= $b->{start} || $b->{start} + $b->{size} <= $a->{start};
}
sub verifyInside {
    my ($a, $b) = @_;
    $b->{start} <= $a->{start} && $a->{start} + $a->{size} <= $b->{start} + $b->{size};
}

sub verifyParts_ {
    foreach my $i (@_) {
	foreach (@_) {
	    next if !$i || !$_ || $i == $_ || isWholedisk($i) || isExtended($i); #- avoid testing twice for simplicity :-)
	    if (isWholedisk($_)) {
		verifyInside($i, $_) or
		  cdie sprintf("partition sector #$i->{start} (%s) is not inside whole disk (%s)!",
			       formatXiB($i->{size}, 512), formatXiB($_->{size}, 512));
	    } elsif (isExtended($_)) {
		verifyNotOverlap($i, $_) or
		  log::l(sprintf("warning partition sector #$i->{start} (%s) is overlapping with extended partition!",
				 formatXiB($i->{size}, 512))); #- only warning for this one is acceptable
	    } else {
		verifyNotOverlap($i, $_) or
		  cdie sprintf("partitions sector #$i->{start} (%s) and sector #$_->{start} (%s) are overlapping!",
			       formatXiB($i->{size}, 512), formatXiB($_->{size}, 512));
	    }
	}
    }
}
sub verifyParts {
    my ($hd) = @_;
    verifyParts_(get_normal_parts($hd));
}
sub verifyPrimary {
    my ($pt) = @_;
    $_->{start} > 0 || arch() =~ /^sparc/ || die "partition must NOT start at sector 0" foreach @{$pt->{normal}};
    verifyParts_(@{$pt->{normal}}, $pt->{extended});
}

sub assign_device_numbers {
    my ($hd) = @_;

    my $i = 1;
    my $start = 1; 
    
    #- on PPC we need to assign device numbers to the holes too - big FUN!
    #- not if it's an IBM machine using a DOS partition table though
    if (arch() =~ /ppc/ && detect_devices::get_mac_model() !~ /^IBM/) {
	#- first sort the normal parts
	$hd->{primary}{normal} = [ sort { $a->{start} <=> $b->{start} } @{$hd->{primary}{normal}} ];
    
	#- now loop through them, assigning partition numbers - reserve one for the holes
	foreach (@{$hd->{primary}{normal}}) {
	    if ($_->{start} > $start) {
		log::l("PPC: found a hole on $hd->{prefix} before $_->{start}, skipping device..."); 
		$i++;
	    }
	    $_->{device} = $hd->{prefix} . $i;
	    $_->{devfs_device} = $hd->{devfs_prefix} . '/part' . $i;
	    $start = $_->{start} + $_->{size};
	    $i++;
	}
    } else {
	foreach (@{$hd->{primary}{raw}}) {
	    $_->{device} = $hd->{prefix} . $i;
	    $_->{devfs_device} = $hd->{devfs_prefix} . '/part' . $i;
	    $i++;
	}
	foreach (map { $_->{normal} } @{$hd->{extended} || []}) {
	    my $dev = $hd->{prefix} . $i;
	    my $renumbered = $_->{device} && $dev ne $_->{device};
	    if ($renumbered) {
		require fs;
		eval { fs::umount_part($_) }; #- at least try to umount it
		will_tell_kernel($hd, del => $_, 'delay_del');
		push @{$hd->{partitionsRenumbered}}, [ $_->{device}, $dev ];
	    }
	    $_->{device} = $dev;
	    $_->{devfs_device} = $hd->{devfs_prefix} . '/part' . $i;
	    if ($renumbered) {
		will_tell_kernel($hd, add => $_, 'delay_add');
	    }
	    $i++;
	}
    }

    #- try to figure what the windobe drive letter could be!
    #
    #- first verify there's at least one primary dos partition, otherwise it
    #- means it is a secondary disk and all will be false :(
    #-
    my ($c, @others) = grep { isFat_or_NTFS($_) } @{$hd->{primary}{normal}};

    $i = ord 'C';
    $c->{device_windobe} = chr($i++) if $c;
    $_->{device_windobe} = chr($i++) foreach grep { isFat_or_NTFS($_) } map { $_->{normal} } @{$hd->{extended}};
    $_->{device_windobe} = chr($i++) foreach @others;
}

sub remove_empty_extended {
    my ($hd) = @_;
    my $last = $hd->{primary}{extended} or return;
    @{$hd->{extended}} = grep {
	if ($_->{normal}) {
	    $last = $_;
	} else {
	    %{$last->{extended}} = $_->{extended} ? %{$_->{extended}} : ();
	}
	$_->{normal};
    } @{$hd->{extended}};
    adjust_main_extended($hd);
}

sub adjust_main_extended {
    my ($hd) = @_;

    if (!is_empty_array_ref $hd->{extended}) {
	my ($l, @l) = @{$hd->{extended}};

	# the first is a special case, must recompute its real size
	my $start = round_down($l->{normal}{start} - 1, $hd->{geom}{sectors});
	my $end = $l->{normal}{start} + $l->{normal}{size};
	my $only_linux = 1; my $has_win_lba = 0;
	foreach (map { $_->{normal} } $l, @l) {
	    $start = min($start, $_->{start});
	    $end = max($end, $_->{start} + $_->{size});
	    $only_linux &&= isTrueLocalFS($_) || isSwap($_);
	    $has_win_lba ||= $_->{pt_type} == 0xc || $_->{pt_type} == 0xe;
	}
	$l->{start} = $hd->{primary}{extended}{start} = $start;
	$l->{size} = $hd->{primary}{extended}{size} = $end - $start;
    }
    if (!@{$hd->{extended} || []} && $hd->{primary}{extended}) {
	will_tell_kernel($hd, del => $hd->{primary}{extended});
	%{$hd->{primary}{extended}} = (); #- modify the raw entry
	delete $hd->{primary}{extended};
    }
    verifyParts($hd); #- verify everything is all right
}

sub adjust_local_extended {
    my ($hd, $part) = @_;

    my $extended = find { $_->{normal} == $part } @{$hd->{extended} || []} or return;
    $extended->{size} = $part->{size} + $part->{start} - $extended->{start};