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authorMystery Man <unknown@mandriva.org>2001-09-05 12:55:06 +0000
committerMystery Man <unknown@mandriva.org>2001-09-05 12:55:06 +0000
commitec7d8bfda214073d222fcadfa1ac9d3ed884ea87 (patch)
treed17c669ffaea9eae8bbc6b1b82b6164e75c6c42d /perl-install/resize_fat/fat.pm
parentd2428470c34f096821615c7f119775b03aa86253 (diff)
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Diffstat (limited to 'perl-install/resize_fat/fat.pm')
-rw-r--r--perl-install/resize_fat/fat.pm138
1 files changed, 0 insertions, 138 deletions
diff --git a/perl-install/resize_fat/fat.pm b/perl-install/resize_fat/fat.pm
deleted file mode 100644
index 31643f0a3..000000000
--- a/perl-install/resize_fat/fat.pm
+++ /dev/null
@@ -1,138 +0,0 @@
-package resize_fat::fat; # $Id$
-
-use diagnostics;
-use strict;
-
-use resize_fat::any;
-use resize_fat::io;
-use resize_fat::c_rewritten;
-
-1;
-
-sub read($) {
- my ($fs) = @_;
-
- resize_fat::c_rewritten::read_fat(fileno $fs->{fd}, $fs->{fat_offset}, $fs->{fat_size}, $fs->{media});
-
- @{$fs->{clusters}{count}}{qw(free bad used)} =
- resize_fat::c_rewritten::scan_fat($fs->{nb_clusters}, $fs->{fs_type_size});
-}
-
-sub write($) {
- my ($fs) = @_;
-
- sysseek $fs->{fd}, $fs->{fat_offset}, 0 or die "write_fat: seek failed";
- foreach (1..$fs->{nb_fats}) {
- resize_fat::c_rewritten::write_fat(fileno $fs->{fd}, $fs->{fat_size});
- }
-}
-
-
-
-#- allocates where all the clusters will be moved to. Clusters before cut_point
-#- remain in the same position, however cluster that are part of a directory are
-#- moved regardless (this is a mechanism to prevent data loss) (cut_point is the
-#- first cluster that won't occur in the new fs)
-sub allocate_remap {
- my ($fs, $cut_point) = @_;
- my ($cluster, $new_cluster);
- my $remap = sub { resize_fat::c_rewritten::set_fat_remap($cluster, $new_cluster) };
- my $get_new = sub {
- $new_cluster = get_free($fs);
- 0 < $new_cluster && $new_cluster < $cut_point or die "no free clusters";
- set_eof($fs, $new_cluster); #- mark as used
- #-log::ld("resize_fat: [$cluster,", &next($fs, $cluster), "...]->$new_cluster...");
- };
-
- #- this must call allocate_fat_remap that zeroes the buffer allocated.
- resize_fat::c_rewritten::allocate_fat_remap($fs->{nb_clusters} + 2);
-
- $fs->{last_free_cluster} = 2;
- for ($cluster = 2; $cluster < $fs->{nb_clusters} + 2; $cluster++) {
- if ($cluster < $cut_point) {
- if (resize_fat::c_rewritten::flag($cluster) == $resize_fat::any::DIRECTORY) {
- &$get_new();
- } else {
- $new_cluster = $cluster;
- }
- &$remap();
- } elsif (!is_empty(&next($fs, $cluster))) {
- &$get_new();
- &$remap();
- }
- }
-}
-
-
-#- updates the fat for the resized filesystem
-sub update {
- my ($fs) = @_;
-
- for (my $cluster = 2; $cluster < $fs->{nb_clusters} + 2; $cluster++) {
- if (resize_fat::c_rewritten::flag($cluster)) {
- my $old_next = &next($fs, $cluster);
- my $new = resize_fat::c_rewritten::fat_remap($cluster);
- my $new_next = resize_fat::c_rewritten::fat_remap($old_next);
-
- set_available($fs, $cluster);
-
- is_eof($old_next) ?
- set_eof($fs, $new) :
- set_next ($fs, $new, $new_next);
- }
- }
-}
-
-
-sub endianness16($) { (($_[0] & 0xff) << 8) + ($_[0] >> 8); }
-sub endianness($$) {
- my ($val, $nb_bits) = @_;
- my $r = 0;
- for (; $nb_bits > 0; $nb_bits -= 8) {
- $r <<= 8;
- $r += $val & 0xff;
- $val >>= 8;
- }
- $nb_bits < 0 and die "error: endianness only handle numbers divisible by 8";
- $r;
-}
-
-*next = \&resize_fat::c_rewritten::next;
-*set_next = \&resize_fat::c_rewritten::set_next;
-
-
-
-sub get_free($) {
- my ($fs) = @_;
- foreach (my $i = 0; $i < $fs->{nb_clusters}; $i++) {
- my $cluster = ($i + $fs->{last_free_cluster} - 2) % $fs->{nb_clusters} + 2;
- is_available(&next($fs, $cluster)) and return $fs->{last_free_cluster} = $cluster;
- }
- die "no free clusters";
-}
-
-#- returns true if <cluster> represents an EOF marker
-sub is_eof($) {
- my ($cluster) = @_;
- $cluster >= $resize_fat::bad_cluster_value;
-}
-sub set_eof($$) {
- my ($fs, $cluster) = @_;
- set_next ($fs, $cluster, $resize_fat::bad_cluster_value + 1);
-}
-
-#- returns true if <cluster> is empty. Note that this includes bad clusters.
-sub is_empty($) {
- my ($cluster) = @_;
- $cluster == 0 || $cluster == $resize_fat::bad_cluster_value;
-}
-
-#- returns true if <cluster> is available.
-sub is_available($) {
- my ($cluster) = @_;
- $cluster == 0;
-}
-sub set_available($$) {
- my ($fs, $cluster) = @_;
- set_next ($fs, $cluster, 0);
-}