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#! /usr/bin/perl
#
# Written by Fernando Alegre <alegre@debian.org> 1996
#
# Applied patch by Dimitri Maziuk <emaziuk@curtin.edu.au> 1997
#         (to handle new tar format)
#
# Modified by Fernando Alegre <alegre@debian.org> 1997
#         (to handle both new and old tar formats)
#
# Modified by Patrik Rak <prak@post.cz> 1998
#         (add by Michael Bramer Debian-mc-maintainer <grisu@debian.org>)
#         (to allow access to package control files)
#
# Modified by Martin Bialasinski <martinb@debian.org> 1999
#         (deal with change in tar format)
#
#
# Copyright (C) 1997 Free Software Foundation
#

sub quote {
    $_ = shift(@_);
    s/([^\w\/.+-])/\\$1/g;
    return($_);
}

sub mcdebfs_list
{
#
#	CAVEAT: Hard links are listed as if they were symlinks
#		Empty directories do not appear at all
#
	local($archivename)=@_;
	local $qarchivename = quote($archivename);
	chop($date=`LC_ALL=C date "+%b %d %H:%M"`);
	chop($info_size=`dpkg -I $qarchivename | wc -c`);
	$install_size=length($pressinstall);

	print "dr-xr-xr-x   1 root     root     0 $date CONTENTS\n";
	print "dr-xr-xr-x   1 root     root     0 $date DEBIAN\n";
	print "-r--r--r--   1 root     root     $info_size $date INFO\n";
	print "-r-xr--r--   1 root     root     $install_size $date INSTALL\n";

        if ( open(PIPEIN, "LC_ALL=C dpkg-deb -c $qarchivename |") )
	{
		while(<PIPEIN>)
		{
			@_ = split;

			$perm=$_[0]; $owgr=$_[1]; $size=$_[2];
			if($_[3] =~ /^\d\d\d\d\-/) { # New tar format
				
				($year,$mon,$day) = split(/-/,$_[3]);
				$month = ("Gee","Jan","Feb","Mar","Apr","May","Jun",
						  "Jul","Aug","Sep","Oct","Nov","Dec")[$mon] || "Gee";
				$time=$_[4];
				$pathindex=5;
			}
			else {
				$mstring='GeeJanFebMarAprMayJunJulAugSepOctNovDec';
				$month=$_[3];
				$mon=index($mstring,$month) / 3;
				$day=$_[4];
				$time=$_[5];
				$year=$_[6];
				$pathindex=7;
			}
			
			$path=$_[$pathindex++];
			$arrow=$_[$pathindex++];
			$link=$_[$pathindex++];
			$link2=$_[$pathindex++];

			$owgr=~s!/! !;
			if($arrow eq 'link')
			{
# report hard links as soft links
				$arrow='->'; $link="/$link2"; 
				substr($perm, 0, 1) = "l";
			}
			if($arrow ne '')
			{
				$arrow=' ' . $arrow;
				$link= ' ' . $link;
			}
			$now=`date "+%Y %m"`;
			($thisyear, $thismon) = split(/ /, $now);
			# show time for files younger than 6 months
			# but not for files with dates in the future
			if ($year * 12 + $mon > $thisyear * 12 + $thismon - 6 &&
				$year * 12 + $mon <= $thisyear * 12 + $thismon) {
				print "$perm 1 $owgr $size $month $day $time CONTENTS/$path$arrow$link\n";
			} else {
				print "$perm 1 $owgr $size $month $day $year CONTENTS/$path$arrow$link\n";
			}
		}
	}
        if ( open(PIPEIN, "LC_ALL=C dpkg-deb -I $qarchivename |") )
        {
               while(<PIPEIN>)
               {
                       @_ = split;
                       $size=$_[0];
                       last if $size =~ /:/;
                       next if $size !~ /\d+/;
                       if($_[4] eq '*')
                       {
                           $perm='-r-xr-xr-x';
                           $name=$_[5];
                       }
                       else
                       {
                           $perm='-r--r--r--';
                           $name=$_[4];
                       }
                       print "$perm 1 root root $size $date DEBIAN/$name\n";
               }
        }
}

sub mcdebfs_copyout
{
	local($archive,$filename,$destfile)=@_;
	local $qarchive = quote($archive);
	local $qfilename = quote($filename);
	local $qdestfile = quote($destfile);

	if($filename eq "INFO")
	{
		system("dpkg-deb -I $qarchive > $qdestfile");
        }
        elsif($filename =~ /^DEBIAN/)
        {
               $qfilename=~s!^DEBIAN/!!;
               system("dpkg-deb -I $qarchive $qfilename > $qdestfile");
	}
	elsif($filename eq "INSTALL")
	{
		if ( open(FILEOUT,">$destfile") )
		{
			print FILEOUT $pressinstall;
			close FILEOUT;
			system("chmod a+x $qdestfile");
		}
	}
	else
	{
	# files can be prepended with ./ or not, depending on the version of tar
		$qfilename=~s!^CONTENTS/!!;
		system("dpkg-deb --fsys-tarfile $qarchive | tar xOf - $qfilename ./$qfilename > $qdestfile 2>/dev/null");
	}
}

sub mcdebfs_run
{
	local($archive,$filename)=@_;
	local $qarchive = quote($archive);
	if($filename eq "INSTALL")
	{
		print "Installing $archive\n";
		system("dpkg -i $qarchive");
	}
	else
	{
		use File::Temp qw(mkdtemp);
		my $template = "/tmp/mcdebfs.run.XXXXXX";
		$template="$ENV{MC_TMPDIR}/mcdebfs.XXXXXX" if ($ENV{MC_TMPDIR});
		$tmpdir = mkdtemp($template);
		$tmpcmd="$tmpdir/run";
		&mcdebfs_copyout($archive, $filename, $tmpcmd);
		system("chmod u+x $tmpcmd");
		system($tmpcmd);
		unlink($tmpcmd);
		rmdir($tmpdir);
	}
}

$pressinstall=<<EOInstall;

                              WARNING
     Don\'t use this method if you are not willing to reinstall everything...

This is not a real file. It is a way to install the package you are browsing.

To install this package go back to the panel and press Enter on this file.

In Debian systems, a package is automatically upgraded when you install a new
version of it. There is no special upgrade option. Install always works.

EOInstall

umask 077;

if($ARGV[0] eq "list") { shift; &mcdebfs_list(@ARGV); exit 0; }
elsif($ARGV[0] eq "copyout") { shift; &mcdebfs_copyout(@ARGV); exit 0; }
elsif($ARGV[0] eq "run") { shift; &mcdebfs_run(@ARGV); exit 0; }

exit 1;