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-rwxr-xr-xpackdrake460
1 files changed, 12 insertions, 448 deletions
diff --git a/packdrake b/packdrake
index f801ad4..d7b3b91 100755
--- a/packdrake
+++ b/packdrake
@@ -1,449 +1,14 @@
#!/usr/bin/perl
-#- Mandrake Simple Archive Extracter/Builder.
-#- Copyright (C) 2000 MandrakeSoft <fpons@mandrakesoft.com>
-#-
-#- This program is free software; you can redistribute it and/or modify
-#- it under the terms of the GNU General Public License as published by
-#- the Free Software Foundation; either version 2, or (at your option)
-#- any later version.
-#-
-#- This program is distributed in the hope that it will be useful,
-#- but WITHOUT ANY WARRANTY; without even the implied warranty of
-#- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-#- GNU General Public License for more details.
-#-
-#- You should have received a copy of the GNU General Public License
-#- along with this program; if not, write to the Free Software
-#- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-#- Simple cat archive with gzip/bzip2 for perl.
-#- This new version is merging of the extract_achive and build_archive.
-#-
-#- uncompressing sheme is:
-#- | |
-#- | | | |
-#- $off1 =|*| } | |
-#- |*| } $off2 =|+| }
-#- |*| } $siz1 => 'gzip/bzip2 -d' => |+| } $siz2 => $filename
-#- |*| } |+| }
-#- |*| } | |
-#- | | | |
-#- | | | |
-#- | |
-#- where %data has the following format:
-#- { 'filename' => [ 'f', $off1, $siz1, $off2, $siz2 ] }
-#- except for symbolink link where it is:
-#- { 'filename_symlink' => [ 'l', $symlink_value ] }
-#- and directory where it is only
-#- { 'filename_directory' => [ 'd' ] }
-#- as you can see, there is no owner, group, filemode... an extension could be
-#- made with 'F' (instead of 'f'), 'L' instead of 'l' for exemple.
-#- we do not need them as it is used for DrakX for fast archive extraction and
-#- owner/filemode is for user running only (ie root).
-#-
-#- archive file contains concatenation of all bzip2'ed group of files whose
-#- filenames are on input,
-#- then a TOC (describing %data, concatenation of toc_line) follow and a
-#- TOC_TRAILER for summary.
-
-#+use strict qw(subs vars refs);
+use strict;
+require packdrake;
#- general information.
-my $VERSION = "0.1";
my $default_size = 400000;
my $default_ratio = 6;
-#- used for uncompressing archive and listing.
-my %toc_trailer;
-my @data;
-my %data;
-
-#- used for compression, always set in main.
-my $tmpz = '';
-
-#- taken from DrakX common stuff, for conveniance and modified to match our expectation.
-sub dirname { @_ == 1 or die "packdrake: usage: dirname <name>\n"; local $_ = shift; s|[^/]*/*\s*$||; s|(.)/*$|$1|; $_ || '.' }
-sub basename { @_ == 1 or die "packdrake: usage: basename <name>\n"; local $_ = shift; s|/*\s*$||; s|.*/||; $_ }
-sub mkdir_ {
- my $root = dirname $_[0];
- if (-e $root) {
- -d $root or die "packdrake: mkdir: error creating directory $_[0]: $root is a file and i won't delete it\n";
- } else {
- mkdir_($root);
- }
- -d $_[0] and return;
- mkdir $_[0], 0755 or die "packdrake: mkdir: error creating directory $_: $!\n";
-}
-sub symlink_ { mkdir_ dirname($_[1]); unlink $_[1]; symlink $_[0], $_[1] }
-
-#- for building an archive.
-sub toc_line {
- my ($file, $data) = @_;
-
- for ($data->[0]) {
- return(/l/ && pack("anna*", 'l', length($file), length($data->[1]), "$file$data->[1]") ||
- /d/ && pack("ana*", 'd', length($file), $file) ||
- /f/ && pack("anNNNNa*", 'f', length($file), $data->[1], $data->[2], $data->[3], $data->[4], $file) ||
- die "packdrake: unknown extension $_\n");
- }
-}
-
-sub cat_compress {
- my ($compress, @filenames) = @_;
- local *F;
- open F, "| $compress >$tmpz" or die "packdrake: cannot start \"$compress\"\n";
- foreach (@filenames) {
- my ($buf, $siz, $sz);
- local *FILE;
- open FILE, $_ or die "packdrake: cannot open $_: $!\n";
- $siz = -s $_;
- while (($sz = sysread(FILE, $buf, $siz > 16384 ? 16384 : $siz))) {
- $siz -= $sz;
- syswrite(F, $buf);
- last unless $siz > 0;
- }
- close FILE;
- }
- close F;
- -s $tmpz;
-}
-
-sub toc_trailer {
- my ($toc_d_count, $toc_l_count, $toc_f_count, $toc_str_size, $uncompress) = @_;
-
- #- 'cz[0' is toc_trailer header where 0 is version information, only 0 now.
- #- '0]cz' is toc_trailer trailer that match the corresponding header for information.
- return pack "a4NNNNa40a4", 'cz[0', $toc_d_count, $toc_l_count, $toc_f_count, $toc_str_size, $uncompress, '0]cz';
-}
-
-#- compute the closure of filename list according to symlinks or directory
-#- contents inside the archive.
-sub compute_closure {
- my %file;
- my @file;
-
- #- keep in mind when a filename already exist and remove doublons.
- @file{@_} = ();
-
- #- navigate through filename list to follow symlinks.
- do {
- @file = grep { !$file{$_} } keys %file;
- foreach (@file) {
- my $file = $_;
-
- #- keep in mind this one has been processed and does not need
- #- to be examined again.
- $file{$file} = 1;
-
- exists $data{$file} or next;
-
- for ($data{$file}[0]) {
- #- on symlink, try to follow it and mark %file if
- #- it is still inside the archive contents.
- /l/ && do {
- my ($source, $target) = ($file, $data{$file}[1]);
-
- $source =~ s|[^/]*$||; #- remove filename to navigate directory.
- if ($source) {
- while ($target =~ s|^\./|| || $target =~ s|//+|/| || $target =~ s|/$|| or
- $source and $target =~ s|^\.\./|| and $source =~ s|[^/]*/$||) {}
- }
-
- #- FALL THROUGH with new selection.
- $file = $target =~ m|^/| ? $target : $source.$target;
- };
-
- #- on directory, try all files on data starting with
- #- this directory, provided they are not already taken
- #- into account.
- /[ld]/ && do {
- @file{grep { !$file{$_} && m|^$file$| || m|^$file/| } keys %data} = ();
- last;
- };
- }
- }
- } while (@file > 0);
-
- keys %file;
-}
-
-#- degraded reading of toc at end of archive, do not check filelist.
-sub read_toc_trailer {
- my ($file) = @_;
- my $toc_trailer;
-
- local *ARCHIVE;
- open ARCHIVE, "<$file" or die "packdrake: cannot open archive file $file\n";
-
- #- seek to end of file minus 64, size of trailer.
- #- read toc_trailer, check header/trailer for version 0.
- seek ARCHIVE, -64, 2;
- read ARCHIVE, $toc_trailer, 64 or die "packdrake: cannot read toc_trailer of archive file $file\n";
- @toc_trailer{qw(header toc_d_count toc_l_count toc_f_count toc_str_size uncompress trailer)} =
- unpack "a4NNNNZ40a4", $toc_trailer;
- $toc_trailer{header} eq 'cz[0' && $toc_trailer{trailer} eq '0]cz' or die "packdrake: bad toc_trailer in archive file $file\n";
-
- close ARCHIVE;
-}
-
-#- read toc at end of archive.
-sub read_toc {
- my ($file) = @_;
- my ($toc, $toc_trailer, $toc_size);
- my @toc_str;
- my @toc_data;
-
- local *ARCHIVE;
- open ARCHIVE, "<$file" or die "packdrake: cannot open archive file $file\n";
-
- #- seek to end of file minus 64, size of trailer.
- #- read toc_trailer, check header/trailer for version 0.
- seek ARCHIVE, -64, 2;
- read ARCHIVE, $toc_trailer, 64 or die "packdrake: cannot read toc_trailer of archive file $file\n";
- @toc_trailer{qw(header toc_d_count toc_l_count toc_f_count toc_str_size uncompress trailer)} =
- unpack "a4NNNNZ40a4", $toc_trailer;
- $toc_trailer{header} eq 'cz[0' && $toc_trailer{trailer} eq '0]cz' or die "packdrake: bad toc_trailer in archive file $file\n";
-
- #- read toc, extract data hashes.
- $toc_size = $toc_trailer{toc_str_size} + 16*$toc_trailer{toc_f_count};
- seek ARCHIVE, -64-$toc_size, 2;
-
- #- read strings separated by \n, so this char cannot be inside filename, oops.
- read ARCHIVE, $toc, $toc_trailer{toc_str_size} or die "packdrake: cannot read toc of archive file $file\n";
- @toc_str = split "\n", $toc;
-
- #- read data for file.
- read ARCHIVE, $toc, 16*$toc_trailer{toc_f_count} or die "packdrake: cannot read toc of archive file $file\n";
- @toc_data = unpack "N". 4*$toc_trailer{toc_f_count}, $toc;
-
- close ARCHIVE;
-
- foreach (0..$toc_trailer{toc_d_count}-1) {
- my $file = $toc_str[$_];
- push @data, $file;
- $data{$file} = [ 'd' ];
- }
- foreach (0..$toc_trailer{toc_l_count}-1) {
- my ($file, $symlink) = ($toc_str[$toc_trailer{toc_d_count}+2*$_],
- $toc_str[$toc_trailer{toc_d_count}+2*$_+1]);
- push @data, $file;
- $data{$file} = [ 'l', $symlink ];
- }
- foreach (0..$toc_trailer{toc_f_count}-1) {
- my $file = $toc_str[$toc_trailer{toc_d_count}+2*$toc_trailer{toc_l_count}+$_];
- push @data, $file;
- $data{$file} = [ 'f', @toc_data[4*$_ .. 4*$_+3] ];
- }
-
- scalar keys %data == $toc_trailer{toc_d_count}+$toc_trailer{toc_l_count}+$toc_trailer{toc_f_count} or
- die "packdrake: mismatch count when reading toc, bad archive file $file\n";
-}
-
-sub catsksz {
- my ($input, $seek, $siz, $output) = @_;
- my ($buf, $sz);
-
- while (($sz = sysread($input, $buf, $seek > 65536 ? 65536 : $seek))) {
- $seek -= $sz;
- last unless $seek > 0;
- }
- while (($sz = sysread($input, $buf, $siz > 65536 ? 65536 : $siz))) {
- $siz -= $sz;
- syswrite($output, $buf);
- last unless $siz > 0;
- }
-}
-
-sub cat_archive {
- my $pid;
-
- foreach (@_) {
- #- update %data according to TOC_TRAILER of each archive.
- read_toc_trailer($_);
-
- #- dump all the file according to
- if (my $pid = fork()) {
- waitpid $pid, 0;
- } else {
- open STDIN, "<$_" or die "packdrake: unable to open archive $_\n";
- open STDERR, ">/dev/null" or die "packdrake: unable to open archive $_\n";
-
- exec split " ", $toc_trailer{uncompress};
-
- die "packdrake: unable to cat the archive\n";
- }
- }
-}
-
-sub extract_archive {
- my ($archivename, $dir, @file) = @_;
- my %extract_table;
-
- #- update %data according to TOC of archive.
- read_toc($archivename);
-
- #- as a special features, if both $dir and $file are empty, list contents of archive.
- if (!$dir && !@file) {
- my $count = scalar keys %data;
- print "$count files in archive, uncompression method is \"$toc_trailer{uncompress}\"\n";
- foreach my $file (@data) {
- for ($data{$file}[0]) {
- /l/ && do { printf "l %13c %s -> %s\n", ' ', $file, $data{$file}[1]; last; };
- /d/ && do { printf "d %13c %s\n", ' ', $file; last; };
- /f/ && do { printf "f %12d %s\n", $data{$file}[4], $file; last; };
- }
- }
- exit 0;
- }
-
- #- compute closure.
- @file = compute_closure(@file);
-
- foreach my $file (@file) {
- #- check for presence of file, but do not abort, continue with others.
- $data{$file} or do { print STDERR "packdrake: unable to find file $file in archive $archivename\n"; next };
-
- my $newfile = "$dir/$file";
-
- print "extracting $file\n";
- for ($data{$file}[0]) {
- /l/ && do { symlink_ $data{$file}[1], $newfile; last; };
- /d/ && do { mkdir_ $newfile; last; };
- /f/ && do {
- mkdir_ dirname $newfile;
- $extract_table{$data{$file}[1]} ||= [ $data{$file}[2], [] ];
- push @{$extract_table{$data{$file}[1]}[1]}, [ $newfile, $data{$file}[3], $data{$file}[4] ];
- $extract_table{$data{$file}[1]}[0] == $data{$file}[2] or die "packdrake: mismatched relocation in toc\n";
- last;
- };
- die "packdrake: unknown extension \"$_\" when uncompressing archive $archivename\n";
- }
- }
-
- #- delayed extraction is done on each block for a single execution
- #- of uncompress executable.
- foreach (sort { $a <=> $b } keys %extract_table) {
- local *OUTPUT;
- if (open OUTPUT, "-|") {
- #- $curr_off is used to handle the reading in a pipe and simulating
- #- a seek on it as done by catsksz, so last file position is
- #- last byte not read (ie last block read start + last block read size).
- my $curr_off = 0;
- foreach (sort { $a->[1] <=> $b->[1] } @{$extract_table{$_}[1]}) {
- my ($newfile, $off, $siz) = @$_;
- local *FILE;
- open FILE, $dir ? ">$newfile" : ">&STDOUT";
- catsksz(\*OUTPUT, $off - $curr_off, $siz, \*FILE);
- $curr_off = $off + $siz;
- }
- } else {
- local *BUNZIP2;
- open BUNZIP2, "| $toc_trailer{uncompress}";
- local *ARCHIVE;
- open ARCHIVE, "<$archivename" or die "packdrake: cannot open archive $archivename\n";
- catsksz(\*ARCHIVE, $_, $extract_table{$_}[0], \*BUNZIP2);
- exit 0;
- }
- }
-}
-
-sub build_archive {
- my ($archivename, $maxsiz, $compress, $uncompress) = @_;
- my ($off1, $siz1, $off2, $siz2) = ('', '', 0, 0, 0, 0);
- my @filelist = ();
- my @data = ();
- my %data = ();
-
- print "choosing compression method with \"$compress\" for archive $archivename\n";
-
- unlink "$archivename";
- unlink $tmpz;
-
- foreach (<STDIN>) {
- chomp;
-
- my $file = $_; -e $file or die "packdrake: unable to find file $file\n";
-
- push @data, $file;
- #- now symbolic link and directory are supported, extension is
- #- available with the first field of $data{$file}.
- if (-l $file) {
- $data{$file} = [ 'l', readlink $file ];
- } elsif (-d $file) {
- $data{$file} = [ 'd' ];
- } else {
- $siz2 = -s $file;
-
- push @filelist, $file;
- $data{$file} = [ 'f', -1, -1, $off2, $siz2 ];
-
- if ($off2 + $siz2 > $maxsiz) { #- need compression.
- $siz1 = cat_compress($compress, @filelist);
-
- foreach (@filelist) { $data{$_} = [ 'f', $off1, $siz1, $data{$_}[3], $data{$_}[4] ] }
-
- system "cat $tmpz >>$archivename";
- $off1 += $siz1;
- $off2 = 0; $siz2 = 0;
- @filelist = ();
- }
- $off2 += $siz2;
- }
- }
- if (scalar @filelist) {
- $siz1 = cat_compress($compress, @filelist);
-
- foreach (@filelist) { $data{$_} = [ 'f', $off1, $siz1, $data{$_}[3], $data{$_}[4] ] }
-
- system "cat $tmpz >>$archivename";
- $off1 += $siz1;
- print "real archive size of $archivename is $off1\n";
- }
-
- #- produce a TOC directly at the end of the file, follow with
- #- a trailer with TOC summary and archive summary.
- local *OUTPUT;
- open OUTPUT, ">>$archivename";
-
- my ($toc_str, $toc_data) = ('', '');
- my @data_d = ();
- my @data_l = ();
- my @data_f = ();
-
- foreach (@data) {
- my $file = $_;
- $data{$file} or die "packdrake: internal error on $_\n";
-
- #- specific according to type.
- #- with this version, only f has specific data other than strings.
- for ($data{$file}[0]) {
- /d/ && do { push @data_d, $file; last; };
- /l/ && do { push @data_l, $file; last; };
- /f/ && do { push @data_f, $file; $toc_data .= pack("NNNN",
- $data{$file}[1],
- $data{$file}[2],
- $data{$file}[3],
- $data{$file}[4]); last; };
- die "packdrake: unknown extension $_\n";
- }
- }
-
- foreach (@data_d) { $toc_str .= $_ . "\n" }
- foreach (@data_l) { $toc_str .= $_ . "\n" . $data{$_}[1] . "\n" }
- foreach (@data_f) { $toc_str .= $_ . "\n" }
-
- print OUTPUT $toc_str;
- print OUTPUT $toc_data;
- print OUTPUT toc_trailer(scalar(@data_d), scalar(@data_l), scalar(@data_f),
- length($toc_str), $uncompress);
- close OUTPUT;
-
- unlink $tmpz;
-}
-
sub usage {
- die "packdrake version $VERSION
+ die "packdrake version " . $packdrake::VERSION . "
Copyright (C) 2000 MandrakeSoft.
This is free software and may be redistributed under the terms of the GNU GPL.
@@ -479,7 +44,7 @@ sub main {
/^--build$/ and do { $mode and die $error_mode; $mode = "build"; @nextargv = (\$file); next };
/^--extract$/ and do { $mode and die $error_mode; $mode = "extract"; @nextargv = (\$file, \$dir); next };
/^--list$/ and do { $mode and die $error_mode; $mode = "list"; @nextargv = (\$file); next };
- /^--cat$/ and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (); next };
+ /^--cat$/ and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (\$file); next };
/^--size$/ and do { push @nextargv, \$size; next };
/^--method$/ and do { push @nextargv, \$method; next };
/^--compress$/ and do { push @nextargv, \$compress; next };
@@ -489,22 +54,20 @@ sub main {
/b/ and do { $mode and die $error_mode; $mode = "build"; @nextargv = (\$file); next };
/x/ and do { $mode and die $error_mode; $mode = "extract"; @nextargv = (\$file, \$dir); next };
/l/ and do { $mode and die $error_mode; $mode = "list"; @nextargv = (\$file); next };
- /c/ and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (); next };
+ /c/ and do { $mode and die $error_mode; $mode = "cat"; @nextargv = (\$file); next };
/s/ and do { push @nextargv, \$size; next };
/m/ and do { push @nextargv, \$method; next };
die "packdrake: unknown option \"-$1\", check usage with --help\n"; } next };
- $mode =~ /extract|cat/ or @nextargv or die "packdrake: unknown option \"$_\", check usage with --help\n";
+ $mode =~ /extract|list|cat/ or @nextargv or die "packdrake: unknown option \"$_\", check usage with --help\n";
my $ref = shift @nextargv; $ref ? $$ref = $_ : push @list, $_;
$mode ||= "list";
}
#- examine and lauch.
- $mode =~ /cat/ or $file or die "packdrake: no archive filename given, check usage with --help\n";
+ $file or die "packdrake: no archive filename given, check usage with --help\n";
$size ||= 400000;
$ratio ||= 6;
- $tmpdir = $ENV{TMPDIR} || "/tmp";
- $tmpz = "$tmpdir/packdrake-tmp.$$";
unless ($method) {
$file =~ /\.cz$/ and $method = "gzip";
$file =~ /\.cz2$/ and $method = "bzip2";
@@ -513,11 +76,12 @@ sub main {
$compress ||= "$method -$ratio";
$uncompress ||= "$method -d";
+ $mode =~ /extract/ && !$dir && !@list and ($mode, @list) = ('list', $file);
for ($mode) {
- /build/ and do { build_archive($file, $size, $compress, $uncompress); last };
- /extract/ and do { extract_archive($file, $dir, @list); last };
- /list/ and do { extract_archive($file); last };
- /cat/ and do { cat_archive(@list); last };
+ /build/ and do { packdrake::build_archive(\*STDIN, $file, $size, $compress, $uncompress); last };
+ /extract/ and do { my $packer = new packdrake($file); $packer->extract_archive($dir, @list); last };
+ /list/ and do { packdrake::list_archive($file, @list); last };
+ /cat/ and do { packdrake::cat_archive($file, @list); last };
die "packdrake: internal error, unable to select right mode?\n";
}
}