#!/usr/bin/perl
#
#                              -*- Mode: Perl -*-
# make-kpkg ---
# Author           : Eduard Bloch <blade@debian.org>
# Status           : Useable, new features planed
#
# Script to assist users with building of the kernel modules
# First purpose: automate as much as possible for Joe User
# Second purpose: have a database about the source of module packages
# (and all steps needed to get it)
# Third purpose: provide general debian/rules include snippets
#
# TARGETs:
#   see usage

require 5.002;
#use strict;
#use diagnostics;

use Text::WrapI18N qw(wrap $columns);

BEGIN {
  eval 'use Locale::gettext';
  if ($@) {
    eval q{ sub gettext { return shift; } };
  } else {
    textdomain('module-assistant');
  }
}

# not so nice, but sufficient. See #396299 for details.
delete $ENV{'VERSION'};
chomp($rows=`tput lines`);
chomp($columns=`tput cols`);
$rows=25 if !$rows;
$columns=80 if !$columns;

$columns--;
# fallback, don't confuse wrap
$columns=40 if ($columns < 10);

my $ret=0;

use Getopt::Long qw(:config no_ignore_case bundling pass_through);
use File::Basename;
use Cwd;

$res = exists $ENV{"MA_DIR"} ? $ENV{"MA_DIR"} : "/usr/share/modass";
$var= exists $ENV{"MA_VARDIR"} ? $ENV{"MA_VARDIR"} : "/var/cache/modass";

my $aptcmd = exists $ENV{"MA_APTCMD"} ? $ENV{"MA_APTCMD"} : "apt-get";

$main::Author      = "Eduard Bloch";
$main::AuthorMail  = "blade\@debian.org";
$main::Version     = ' $Id:  $ ';

$helpmsg="\n" .
wrap('', '', gettext("USAGE:

  module-assistant update
  module-assistant [options] COMMAND [ packages ]

module-assistant is the tool to get debianized source of kernel modules,
build module package from it and install them. The most frequently used
command may be auto-install followed by the 'alli' argument.

Commands:

  update - refresh internal information about the packages
  unpack - unpacks the tarballs of specified packages (or similar action)
  get - download/install the source (package) and unpack if needed
  build - build the specified package(s)
  list - print information about installed/available/compiled packages
  install - install the generated binary modules DEB package with dpkg
  auto-install - the whole process, get & build & install (abbreviated: a-i)
  prepare - install headers for the current kernel and set the linux symlink
  clean - quick clean of the source (eg. wiping the build directory)
  purge - removes cached data and existing modules packages
  la (alias for \"list all\"), li (= \"list all installed\"), search (= \"list -s\")

Package arguments:

  Source package name(s). If -src or -source is omitted, name
  completion will try to guess the package name. If the first argument
  is 'all', the list will be expanded to all packages. 'alli' will be
  expanded to \"all installed\".

Options:
 -h, --help        Print this help screen
 -v, --verbose     Be verbose, show full paths, etc.
 -q, --quiet       The opposite of verbose
 -n, --no-rebuild  Don't rebuild when any usable modules package for 
                   this kernel exists (even an old one)
 -i, --non-inter   Don't stop on build failures, auto-install deps when needed
 -o, --unpack-once Unpack the source only once after source upgrade or clean
 -O, --not-unpack  Don't unpack the source at all
 -s, --apt-search  Search for installation candidates in the Debian archive
 -S, --sudo-cmd    An alternative command for sudo
 -f, --force       Force duplicated work: source package reinstallation,
                   rebuild though existing packages are found, etc.
 -t, --text-mode   Text mode, no dialog boxes
 -u, --userdir     Specifies a (writeable) replacement directory for /var&/usr
 -k, --kernel-dir  List of kernel headers/source directories, comma separated
 -l, --kvers-list  List of kernel versions to work on (default: current version)
Lists in options are strings separated by commas, spaces or newlines.

Example:
  m-a update ; m-a a-i nvidia-kernel ; echo Enjoy!")) . "\n";

$reqsrcmsg="\n" .
gettext("Warning: the selected module source is known to require a complete
kernel source structure in order to be built correctly. However, only
a reduced version of the source (linux-headers) has been found, so
the build process will probably fail.

In order to get a full kernel source, you have the following options:

 - fake the source directory - create one that may look very similar
   to the one that has been used to build your kernel (based on its
   configuration and fresh source archive). The results are uncertain,
   but it should work in most cases.
   Call \"module-assistant fakesource\" to automate this.
 - use a custom kernel built from scratch (custom configuration,
   custom source, custom kernel package installed). Please read the
   Kernel HOWTO and/or make-kpkg documentation for the further steps."). "\n";

chomp($my_kvers=`uname -r`);

my $distrib_id = get_distrib_id();

my $usrc="/usr/src";

my $opt_help;
my @opt_kerneldirs;
my @opt_kverslist;
my $opt_verbose;
my $opt_force;
my $opt_norebuild;
my $opt_quiet;
my $opt_debug;
my $opt_search;
my $opt_nogui;
my $opt_userdir;
my $opt_noninter;
my $opt_unponce;
my $opt_notunp;
my $sudo;

%options = (
   "q|quiet"                => \$opt_quiet,
   "d|debug"                => \$opt_debug,
   "h|help"                => \$opt_help,
   "f|force"               => \$opt_force,
   "o|unpack-once"               => \$opt_unponce,
   "O|not-unpack"               => \$opt_notunp,
   "n|no-rebuild"                => \$opt_norebuild,
   "i|non-inter"                => \$opt_noninter,
   "k|kernel-dir=s"             => \@opt_kerneldirs,
   "l|kvers-list=s"             => \@opt_kverslist,
   "v|verbose"              => \$opt_verbose,
   "t|text-mode"          => \$opt_nogui,
   "u|userdir|user-dir=s"          => \$opt_userdir,
   "s|apt-search"          => \$opt_search,
   "S|sudo-cmd=s"          => \$sudo
);
&help unless ( GetOptions(%options));
&help if ($opt_help);
$ENV{"VERBOSE"}=1 if($opt_verbose);
$ENV{"REINSTALL"} .= " -y --force-yes ";
#$ENV{"APT_LISTCHANGES_FRONTEND"} = "mail" if $opt_noninter; # STFU

my $buildNumber = time();

$opt_nogui=1 if $opt_noninter;

my $command=shift(@ARGV);
@targets=@ARGV;
@opt_kverslist = split(/,|\ |\r|\n/,join(',',@opt_kverslist));
@opt_kerneldirs = split(/,|\ |\r|\n/,join(',',@opt_kerneldirs));
map { $_=Cwd::abs_path($_) if(!/^\//); } @opt_kerneldirs;

# add current kernel to the kvers list, check validity later
push(@opt_kverslist, $my_kvers) if ($#opt_kverslist < 0 && $#opt_kerneldirs < 0);

push(@opt_kerneldirs, split(/,|\ |\r|\n/,$ENV{"KERNELDIRS"})) if (defined $ENV{"KERNELDIRS"});

$modloc=$ENV{"MODULE_LOC"} ? $ENV{"MODULE_LOC"}:"$usrc/modules";

if(open(complist, "$res/compliant.list")) {
   for(<complist>) {
      chomp;
      next if !$_;
      print "Known compliant: $_\n" if $opt_debug;
      #$packs{$_}="MA_SOURCE_PKG=$_ $res/packages/default.sh";
      $packs{$_}="$res/packages/default.sh";
      $compliant{$_}=1;
   }
}

opendir($resdir, $res."/packages");
foreach(readdir($resdir)) {
   print "Known with extensions/workarounds: $_\n" if $opt_debug;
   $packs{$_}=$res."/packages/".$_ if(-e $res."/packages/".$_ && !/^\.|.sh$|~$/);
}

sub scan_overrides {
   opendir($overdir, $res."/overrides");
   foreach(readdir($overdir)) {
      print "Known overrides: $_\n" if $opt_debug;
      $packs{$_}=$res."/overrides/".$_ if(-e $res."/overrides/".$_ && !/^\.|.sh$|~$/);
   }
}

&scan_overrides;

if($command eq "comp") {
   map {print "$_\n"} grep(/^$targets[0]/, ("all", "alli", "allu", keys %packs));
   exit 0;
}

if($command eq "compi") {
   map {print "$_\n" if($_ eq "alli" || ! pexec($_, "installed")) } grep(/^$targets[0]/, ("alli", keys %packs));
   exit 0;
}

if($command eq "compv") {
   &initksrc;
   print grep(/^$targets[0]/, @seenkvers);
   exit 0;
}

if(!$opt_nogui) {
   $dialog=$ENV{"DIALOG"};
   if(!$dialog) {
      if($ENV{"TERM"} ne "dumb" && `infocmp 2>/dev/null` ne '') {
         @expaths=split(/:/,$ENV{"PATH"});
         for $dia ("dialog", "whiptail") {
            for(@expaths) {
               last if($dialog);
               $dialog="$_/$dia" if(-x "$_/$dia");
            }
         }
      }
   }
   $opt_nogui = !$dialog;
   $wtmode=1 if($dialog=~/whiptail$/);
}

sub lsd {
   my @list;
   $path=shift;
   opendir($dir, $path);
   foreach(readdir($dir)) {
      if ($_ ne "." && $_ ne ".." && -d "$path/$_") {
         my $name=complete_name($_, 1);
         push(@list, $name) if($name);
      }
   }
   return @list;
}

sub help() {
   print $helpmsg;
   exit 1;
};

sub ende {
   if($ret >= 250 && $ret < 256) {
      exit $ret;
   }
   else {
      exit (($ret%250)+($ret>0));
   }
}

sub withecho {
    # weed undefs out
    for($i=0; $i<=$#_; $i++) {
        splice(@_, $i, 1) if(!defined($_[$i]));
    }
    print STDERR join(' ',@_, "\n") if($opt_verbose);
    my $myret=system(@_);
    $ret += $myret;
    #%env=%envbackup;
    return $myret;
}

sub pread {
    my $p=shift;
    $ENV{MA_SOURCE_PKG}=$p;
    return "" if(! exists $packs{$p});
    print STDERR 'Reading output from "'.$packs{$p}." ".join(" ", @_)."\"\n" if($opt_debug);
    open(my $fh, "-|", $packs{$p}, @_);
    my $retval=join("", <$fh>);
    close($fh);
    return $retval;
}

sub pexec {
    my $p=shift;
    $ENV{MA_SOURCE_PKG}=$p;
    for($i=0; $i<=$#_; $i++) {
        splice(@_, $i, 1) if(!defined($_[$i]));
    }
    if($_[0] eq "VERB") {
        shift;
        print STDERR join(' ',@_, "\n") if($opt_verbose);
    }
    return system($packs{$p}, @_);
}

sub countList { return scalar @_; }

my $catchprint;

sub printwrap {
   if($catchprint) {
      $printbuf .= join('', @_);
   }
   else { 
      print @_; 
   }
}
$smso=`tput smso`;
$rmso=`tput rmso`;

sub printmsg {
   my $orgcolumns=$columns;
   if(!$opt_nogui) {
      $columns=65;
      chomp($tmpname = `mktemp`);
      open($tmpfile, ">$tmpname");
      print $tmpfile wrap('','',@_);
      close($tmpfile);
      if($wtmode) {
         system($dialog, "--scrolltext", "--title", gettext("module-assistant, error message"), "--textbox", $tmpname, 18, 70);
      }
      else {
         system($dialog, "--aspect", 12, "--title", gettext("module-assistant, error message"), "--textbox", $tmpname, 0, 0);
      }
      unlink $tmpname;
   }
   else {
      $columns=$ENV{"COLUMNS"} -2 if( $ENV{"COLUMNS"} > 10);
      print STDERR $smso;
      print STDERR wrap('','',@_);
      print STDERR $rmso;
      print "\n";
   }
}

sub printconfirm {
   printmsg(@_);
   if($opt_nogui) {
      print "\n" . gettext("Press Return to continue... (ctrl-c to abort)") . "\n";
      ($opt_noninter || <STDIN>);
   }
}
   
restart:

# User-trimmed paths
if($opt_userdir) {
   die sprintf(gettext("%s is not a directory!"), $opt_userdir) . "\n"  if(! -d "$opt_userdir/.");
   die sprintf(gettext("%s is not writeable!"), $opt_userdir) . "\n"  if(! -w "$opt_userdir/.");
   $opt_userdir=Cwd::abs_path($opt_userdir);
   $var="$opt_userdir/var_cache_modass";
   $ENV{"MA_VARDIR"}=$var;
   mkdir $var;
   die sprintf(gettext("%s is not writeable!"), $opt_userdir) . "\n"  if(! (-d $var && -w $var));
   $ENV{"MOD_TOPDIR"}="$opt_userdir/usr_src";
   mkdir "$opt_userdir/usr_src";
   $ENV{"MODULE_LOC"}="$opt_userdir/usr_src/modules";
   $ENV{"KPKG_DEST_DIR"}=$opt_userdir if(! defined($ENV{"KPKG_DEST_DIR"}));
   if (! defined($sudo)) {
       if(-x "/usr/bin/sudo") {
           print wrap('','',gettext("Found sudo, will use it for $aptcmd and dpkg commands.") . "\n") if $opt_verbose;
           $sudo="/usr/bin/sudo";
       }
       else {
           print wrap('','',gettext("Warning: sudo not found. Automatic package installations not possible!") . "\n") if !$opt_quiet;
       }
   }
}

sub setvars {
   $ENV{"KDREV"} = $KDREV if defined($KDREV);
   $ENV{"KVERS"} = $KVERS;
   $ENV{"KSRC"} =  $kerneldirs{$KVERS};
   $ENV{"KPKG_DEST_DIR"}=Cwd::abs_path($kerneldirs{$KVERS}."/..") if(! defined($ENV{"KPKG_DEST_DIR"}));
   $ENV{"MA_DEBUG"}=1 if $opt_debug;
   $ENV{"MA_NOTUNP"}=1 if $opt_notunp;
   print "Setting environment:
   KDREV: $ENV{KDREV}
   KVERS: $ENV{KVERS}
   KSRC:  $ENV{KSRC}
   KPKG_DEST_DIR: $ENV{KPKG_DEST_DIR}
" if($opt_debug);
}

sub have_source_or_break {
   # if user specified no source, extra_vers[0] is our $my_kvers. If
   # user specified something but without useable source, then
   # extra_vers[0] is at least this one value. If there are more, don't
   # complaing about them, though

   my $kvers=$extra_kvers[0];
   my $kheadpkg = get_kpackage($kvers)."-headers-$kvers";
   if(!(keys %kerneldirs)) {
      printmsg "\n\n" .
wrap('','',gettext("Bad luck, the kernel headers for the target kernel version could not be found and you did not specify other valid kernel headers to use.")) . "
      " if !$kernelwarned;

      if (length(`apt-cache show $kheadpkg 2>/dev/null`) ) {
         printmsg "\n" .sprintf(
gettext(
"However, you can install the header files for your kernel which are provided by the %s package. For most modules packages, these files are perfectly sufficient without having the original kernel source.

To install the package, run"
), $kheadpkg).($opt_nogui ? "" : gettext(
" the PREPARE command from the main menu, or on the command line")).sprintf(gettext(
":

module-assistant prepare

or

$aptcmd install %s")
, $kheadpkg) . "\n\n" ;
         exit 255 if($opt_nogui);
         $ret++;
         return 0;
      }
      else {
         printmsg "\n" . sprintf(
            gettext(
               "If the running kernel has been shipped with the Debian distribution, please install the package %s. If your kernel source tree (or headers) is located in some non-usual location, please set the KERNELDIRS environment variable to the path of this directory, or (alternatively) specify the source directory we build for with the --kernel-dir option in module-assistant calls."
            ), $kheadpkg)
            . "\n" if !$kernelwarned;

            exit 255  if($opt_nogui);
            $ret++;
            return 0;
         }
   }
   return 1;
}

sub up {
   my $pkg;
   my $out;
   my @packnames;
   if(@_) {
       # direct call, needs completion
       for(@_) { push(@packnames, complete_name($_));}
   }
   else {
      @packnames=sort(keys %packs);
   }
   # we provide apt-policy data, polling it with one call for
   # performance reasons
   print "Reading APT data: LANG=C apt-cache policy ".join(' ', @packnames)."\n" if $opt_debug;
   open($apt, "LANG=C apt-cache policy ".join(' ', @packnames)." 2>/dev/null |");
   while(<$apt>) 
   { 
      if (/^(\w\S+):/) {
         $pkg=$1;
         close($out);
         if(! exists $compliant{$pkg}) { # for "others"
            print "Opening $var/$pkg.apt_policy\n" if $opt_debug;
            open($out, ">$var/$pkg.apt_policy") or die "Unable to write to $var/$pkg.apt_policy";
         }
      }
      else {
          if(! exists $compliant{$pkg}) { # copy for "others"
              print $out $_;
          }
          $instvers{$pkg} = $1 if (/Installed: (.*)\n/ && $1 ne "(none)");
          $candvers{$pkg} = $1 if (/Candidate: (.*)\n/ && $1 ne "(none)");
      }
   }
   close($out);
   my $i;
   if(!$opt_nogui) {
      open($dpipe, "| $dialog --title \"" . gettext("Updating cached package data") . "\" --gauge \"" . gettext("Reading apt-cache output...") . "\" 7 75 0");
      select($dpipe);
      $|=1;
      select(*STDOUT);
   }

   foreach(@packnames) {
      $i++;
      if($opt_nogui) {
         if($opt_verbose) {
            print sprintf(gettext("Updating info about %s"), $_) . "\n";
         }
         elsif(!$opt_quiet) {syswrite(STDERR,'.');}
      }
      else {
         $pr=sprintf("%.0f", $i * 100 / ($#packnames+1));
         print $dpipe "$pr\nXXX\n$_\nXXX\n";
      }
      my $oldret;
         print "W: instvers from $_? $instvers{$_}\n" if $opt_debug;
      if($instvers{$_}) {
         print "W: $var/$_.cur_version\n" if $opt_debug;
         open(cv, ">", "$var/$_.cur_version") || $ret++;
         print cv $instvers{$_};
         close cv;
      }
      else { unlink "$var/$_.cur_version"};
      if($candvers{$_}) {
         print "W: $var/$_.avail_version" if $opt_debug;
         open(cv, ">$var/$_.avail_version") || $ret++;
         print cv $candvers{$_};
         close cv;
      }
      else { unlink "$var/$_.avail_version"};
         
      if($oldret != $ret) {
         $ret += pexec($_, "update");
      }
   }
   close($dpipe);
   print "\n" . ($i ? sprintf(gettext("Updated infos about %s packages"), $i) : sprintf(gettext("Updated infos about %s package"), $i))."\n" if !$opt_quiet;
   #unlink (<$var/*.apt_policy>);
}


# get distrib_id from /etc/lsb-release; default to Debian
sub get_distrib_id
{
   my $LSB;
   my $distrib_id = "Debian";
  
   if (open($LSB, "/etc/lsb-release")) {
      while (defined(my $lsb = <$LSB>)) {
         return "Ubuntu"  if ($lsb =~ /DISTRIB_ID.*Ubuntu/i);
         return "Debian"  if ($lsb =~ /DISTRIB_ID.*Debian/i);
      }
      close($LSB);
   }
   return "Debian";   
}


# get kernel package prefix depending on distribution and kernel version
sub get_kpackage
{
    return "linux" if ($distrib_id eq "Ubuntu"); # Ubuntu uses "linux"

    # Debian started using "linux" with 2.6.12
    my @versar = split(/\D/, $_[0]);
    return "linux" if( $versar[0] > 2 || ($versar[1] >= 6 && $versar[2] >= 12));
    # default to "kernel"
    return "kernel";
}


sub prep {
   print "chdir $usrc\n" if $opt_debug;
   %envbackup=%ENV;
   $ENV{ROOT_CMD}=$sudo if ($sudo && !$ENV{ROOT_CMD});
   for $todo ($opt_kverslist[0]) {
      my $kheaders = get_kpackage($todo)."-headers";
      $source=$kerneldirs{$todo};
      die "Bad kernel version specification" if ! $todo;
      print STDERR gettext("Getting source for kernel version:")." $todo\n";
      print STDERR sprintf(gettext("%s."), $source) . "\n" if $opt_debug;
      print STDERR values(%kerneldirs),"\n\n" if $opt_debug;
      my $symfrom;
      if(defined($source)) {
         print STDERR sprintf(gettext("Kernel headers available in %s"), $source) . "\n";
         $opt_verbose=1;
         # if source was resolved to linux before, it is okay. If not,
         # make the symlink. If linux exists but points to sth. wrong for
         # us, move it away by renaming
         if($source ne "$usrc/linux") {
            $symfrom = (dirname($source) eq "$usrc") ? basename($source) :  Cwd::abs_path($source);
         }
      }
      else {
         $opt_verbose=1;
         withecho($sudo, $aptcmd, ($opt_noninter?"-y":undef), "install", "$kheaders-$todo");
         if($my_kvers eq $todo) {
            $symfrom="$kheaders-$todo";
         }
      }
      if(-l "$usrc/linux" && readlink("$usrc/linux") eq $symfrom  ) { 
          #great, nothing to do anymore
      }
      else {
          print STDERR gettext("Creating symlink...") . "\n";
          rename("$usrc/linux","$usrc/linux-OLDVERSION.".time) if(-e "$usrc/linux" || -l "$usrc/linux");
          symlink($symfrom,"$usrc/linux") || print STDERR sprintf(gettext("Couldn't create the %s/linux symlink!"), $usrc). "\n";
      }
   }
#   if(`apt-cache policy build-essential` =~ /Installed:..none/) {
      print STDERR gettext("Installing packages needed for the build environment...") . "\n" if (!opt_quiet);
      withecho($sudo, $aptcmd, ($opt_noninter?"-y":undef), "install", "build-essential");
#   }
   print STDERR "\n". gettext("Done!") . "\n";
   %ENV=%envbackup;
}

sub complete_name {
   my ($target) = @_;
   $target=~s/^\s+//;
   my $pkg;
   my @posnames=($target);
   my $d;

   if(defined($packs{$target})) {
      return $target;
   }

   # no luck, begin with probing
   #
   for $sufMult ("", "s") {
      for $sufType ("", "-driver", "-kernel", "-module") {
         for $sufSrc ("-source", "-src") {
            push(@posnames, $target.$sufType.$sufMult.$sufSrc);
         }
      }
   }
   PROBE: for (@posnames) {
      print STDERR gettext("PROBE:") . " $_\n" if $opt_debug;
      if(defined($packs{$_})) 
      {
         print STDERR gettext("GOT NAME:") . " $_\n" if $opt_debug;
         return $_;
      }
   }

   for $getName (keys %packs) {
      if(!defined($pkg)) {
          
         $prefix=pread($pkg, prefix);
         chomp($prefix);
         return $prefix if($prefix eq $getName);
      }
   }

   # ugly, ugly, ugly, looking for an available package with similar
   # name and constructing a call for it
   open($d, "apt-cache policy ".join(" ", @posnames)." 2>/dev/null |");
   print "\n\n\nhm,  apt-cache policy ".join(" ", @posnames)."\n\n\nend" if $opt_debug;

   pol: while(<$d>) {
      if(/^(\S+):/) {
         $pkg=$1;
         print "Forced compliant: $pkg\n" if $opt_debug;
         $packs{$pkg}="$res/packages/default.sh";
         $compliant{$pkg}=1;
         return $pkg;
      }
   }
   close($d);

   return "0" if(defined($_[1])); # some cosmetical workaround
   die sprintf(gettext("%s, what is %s?"), $target, $target) . "\n";
}

sub unpackone {
   my ($pkg) = @_;
   if(!$opt_unponce) {
      return pexec($pkg, "VERB", "unpack");
   }

   # continue with unpack-once operation
   chomp(my $pkgvers=pread($pkg, "cur_version"));
   my $flagfile="$var/$pkg.unpackflag.$pkgvers";
   #print "Looking for unpacked flag: $flagfile\n";
   return 0 if (-e $flagfile && !$opt_force);

   #remove old flags
   unlink(<$var/$pkg.unpackflag.*>);

   if(! pexec($pkg, "VERB", "unpack")) {
      open (tmp,">$flagfile");
      close tmp;
   }
}

sub get {
   my $newstuff=0;
   my $faillog="";
   %envbackup=%ENV;
   $ENV{ROOT_CMD}=$sudo if ($sudo && !$ENV{ROOT_CMD});
   SKIP: foreach $target (@_) {
      my $pkg;
      my $reti=0;
      $pkg=complete_name($target);
      next SKIP if( $installed_only && pexec($pkg, "installed"));
      # war is peace! zero is success! non-zero is failure!


      if($opt_force) {
         $ENV{"REINSTALL"} .= " --reinstall " unless ($ENV{"REINSTALL"}=~/--reinstall/);

         $reti=pexec($pkg, "VERB", "download");
         $newstuff++;
      }
      else {
         if(pexec($pkg, "installed")) {
            $reti=pexec($pkg, "VERB", "download");
            $newstuff++;
         }
         else {
            my $curpkgvers=pread($pkg, "cur_version"); chomp($curpkgvers);
            my $avpkgvers =pread($pkg, "avail_version"); chomp($avpkgvers);
            if($curpkgvers ne $avpkgvers) {
                # workaround for correct sudo command passing
                # NOTE: env set from pread above!
               $reti=withecho($sudo, $packs{$pkg}, "download");
               $newstuff++;
            }
         }
      }

      print "D: download, ret: $reti\n" if $opt_debug;

      my @tounpack;

      # and don't unpack if download failed
      if (!$reti) {
         push(@tounpack, $pkg);
##         if($opt_ondemand) {
##            if(`$packs{$pkg} cur_version` ne $before) {
##               withecho("$packs{$pkg} unpack");
##            }
##         }
##         else {
#            withecho("$packs{$pkg} unpack");
##         }
      }
      else
      {
         my $msg=sprintf(gettext("Installation of the %s source failed."), $pkg) . "\n";
#         $msg.=gettext("Ignoring this package. Maybe you need to add something to sources.list, maybe the contrib and non-free archives.") . "\n";
         $blacklist{$pkg}=1;

         $faillog .= ($faillog ? $msg : $msg."\n".gettext("Ignoring this package. Maybe you need to add something to sources.list, maybe the contrib and non-free archives.")."\n\n");

         sleep(2);

         #printmsg $msg;
      }
   }
   printmsg $faillog if $faillog;

   # done with critical stuff, restore env
   %ENV=%envbackup;

   if($newstuff) {
      &up(@_);
      &scan_overrides();
   }
   unpackone($_) for @tounpack;
}

sub unp {
   SKIP: foreach $target (@_) {
      my $pkg;
      $pkg=complete_name($target);
      next SKIP if( $installed_only && pexec($pkg, "installed"));
      unpackone($pkg);
#      $opt_ondemand || withecho("$packs{$pkg} unpack");
   }
}

sub getkdrev {
   if(open($chlog, $kerneldirs{$KVERS}."/debian/changelog")) {
      if (<$chlog> =~ /^(\S+)\s*\((.+)\)/) {  $KDREV=$2; }
      close($chlog);
   }
   # fallback to -headers oder -image version, may be incorrect but better than nothing
   my $kheaders = get_kpackage($KVERS)."-headers";
   my $kimage = get_kpackage($KVERS)."-image";
   FROMAPT: for $pb ($kheaders, $kimage) {
      last FROMAPT if(defined($KDREV));
      if(open($aptpipe,"LANG=C apt-cache policy $pb-$KVERS 2>/dev/null |")) {
         while(<$aptpipe>) { 
            if(/Installed:\s*(.+)\n/ && ($1 ne "(none)")) { $KDREV=$1; }
         }
         close $aptpipe;
      }
   }
}

sub build {
   # lart the user if there is no source (only @extra_kvers)
   # exit in non-dialog mode

   # if have_source_or_break terminates the program, okay. If
   # have_source_or_break returns 0, then build should not continue;
   # otherwise, go ahead
   return if (!have_source_or_break());
   foreach(values %kerneldirs) {
      if( (! $ENV{"KPKG_DEST_DIR"}) && (! -w Cwd::abs_path("$_/..")) ) {
         printconfirm gettext("\$KPKG_DEST_DIR is not set and the target directory") . "\n".
         sprintf(gettext("%s is not writeable for you!\nYour build will probably fail!"), Cwd::abs_path("$_/..")) . "\n";
         #sleep(5) if($opt_nogui);
      }
   }
   my $pkg;
   my $res;
   SKIP: foreach $target (@_) {
      $pkg=complete_name($target);
      next SKIP if( $installed_only && pexec($pkg, "installed"));
      next SKIP if($blacklist{$pkg});

      labKVERS: foreach $KVERS ((values %kernelvers)) {
         undef $newdeb;
         undef $lastdeb;
         undef $KDREV;
         &getkdrev($KVERS);
         &setvars;

         unpackone($pkg);
         $lastdeb=pread($pkg, "lastpkg");
         $newdeb=pread($pkg, "echodebfile");
         chomp($lastdeb); chomp($newdeb);

         # An incomplete hack to track versions by creating fingerprint files
         # that refer to KDREV, KVERS, package version. IMO not needed since
         # most package use module-assistant now
         if($lastdeb && !$newdeb) {
            # that's crap. this package does not use m-a includes and so it
            # does not show its target deb. Assume that the new deb will be the
            # same if kdrev, kvers, and package version do match
            $fprfile = $lastdeb;
            $fprfile =~ s#/#_#g;
            $fprfile = "$var/$fprfile.txt";
            if(open(fingerprint, $fprfile)) {
               my ($pver, $pkvers, $pkdrev) = <fingerprint>;
               close(fingerprint);
               my $curpkgvers=pread($pkg, "cur_version"); chomp($curpkgvers);
               $newdeb = $lastdeb if($pver eq "$curpkgvers\n" && $pkvers eq "$KVERS\n" && $pkdrev eq "$KDREV\n");
            }
         }
            
         if (length($lastdeb) && -e $lastdeb && !$opt_force) {
            $lastdeb=Cwd::abs_path($lastdeb);
            $newdeb =Cwd::abs_path($newdeb);
            # there is a candidate
            if($opt_norebuild) {
               # and do _not_ rebuild choosen
               print wrap('','',sprintf(gettext("Recently built package %s found, not rebuilding %s"), $lastdeb, $pkg)) , "\n";
               next labKVERS;
            }
            if ($lastdeb eq $newdeb) {
               # target file is absolutely the same
               print STDERR wrap('','',sprintf(gettext("Target package file %s already exists, not rebuilding!"), $newdeb)) . "\n";
               print STDERR wrap('','', "(however, you could use the -f switch to ignore it)\n");
               next labKVERS;
            }
         }
         # implicit else
         # keeping as is :(, environment set above
         # that sucks, need to supress make's bitching and so use a subshell call
         if(  !system("\"$packs{$pkg}\" reqsrc 2>/dev/null") && !isfullsrc($kerneldirs{$KVERS}) ) {
            # crap, wants full source but does not get it
            printconfirm $reqsrcmsg;
         }
         $cmd ="\"$packs{$pkg}\" build KVERS=$KVERS KSRC=".
         $kerneldirs{$KVERS}.
         ( (defined($KDREV)) ? " KDREV=$KDREV" : "").
         ( (defined($ENV{"KPKG_DEST_DIR"})) ? "" : 
         "KPKG_DEST_DIR=".Cwd::abs_path($kerneldirs{$KVERS}."/..") ).
         ( ($ENV{"SIGNCHANGES"}) ? " kdist" : " kdist_image" )
         ;
         print STDERR "$cmd\n" if($opt_verbose);
         if(!$opt_nogui) {
            # guess how verbose the build will be...
            $pkg=~/^([^-]+)/;
            map { $lnumber++ } `find $modloc/$1*`;
            $lnumber = 250 if($lnumber<100);
            
            open($bpipe, "$cmd 2>&1 |");
            $step=1;
            open($dpipe, "| $dialog --title \"" . sprintf(gettext("Building %s, step %d, please wait..."), $pkg, $step) . "\" --gauge \"" . gettext("Build starting...") . "\" 15 75 0");
            select($dpipe);
            $|=1;
            select(*STDOUT);
            my $linebuf;
            my $anz=1;
            PARSEOUTPUT: while($anz) {
               my $input;
               $anz=sysread($bpipe, $input, 8);
               $linebuf.=$input;
               if(!$anz) {
                  # last iteration, line may be incomplete
                  $line=$linebuf;
               }
               elsif($linebuf=~/([^\n]+)\n(.*)/) {
                  $line=$1;
                  $linebuf=$2;
               }
               else {
                  next PARSEOUTPUT;
               }
               $pr=sprintf("%.0f", $lfdzeile++ * 100 / $lnumber);
               if($pr> 100) {
                  # eeeeks, overflow, restart dialog
                  $step++;
                  close($dpipe);
                  open($dpipe, "| $dialog --title \"". sprintf(gettext("Building %s, step %d, please wait..."), $pkg, $step) . "\" --gauge \"". gettext("Build continues...") . "\" 15 75 0");
                  select($dpipe);
                  $|=1;
                  select(*STDOUT);
                  $lfdzeile=0;
                  $pr=0;
               }
               # detox before printing
               #$line=~s/'|"|`//g;
               syswrite($dpipe,"$pr\nXXX\n$line\nXXX\n");
            }
            close($bpipe);
            $res = ($? >> 8);
            $ret += $res;
            if(!$?) {
               $deb=pread($pkg, "lastpkg");
               chomp($deb);
               
               print $dpipe "100\nXXX\n" . sprintf(gettext("Done! Run\nm-a install %s\nto install."), $pkg) . "\nXXX\n";
#               $build_ok{$pkg}
            }
            else {
               # hack. Dirty hack. But if this fails, what is reliable
               # then?
               chomp($file=`ls -tr $var/$pkg.buildlog.$KVERS.* | tail -n1`);
               if(!$opt_noninter) {
                  $gui_loop=1;
                  $defsel="VIEW";
                  sleep 1;
                  RES: while($gui_loop) {
                     open($intro, "$dialog --default-item $defsel --clear --title ".'"' . gettext("module-assistant, interactive mode") .'" --menu "' . sprintf(gettext("Build of the package %s failed! How do you wish to proceed?"), $pkg) . '\n\n" 14 65 5 VIEW "' . gettext("Examine the build log file") . '" CONTINUE "' . gettext("Skip and continue with the next operation") . '" STOP "' . gettext("Stop processing the build commands") . '" 2>&1 >/dev/tty |');
                     @out = <$intro>;
                     close($intro);
                     $dialog_ret= ($? >> 8);
                     last RES if($dialog_ret);
                     die gettext("Dialog command not working correctly!") . "\n" if($#out != 0);
                     $defsel=$out[0];
                     if($defsel eq "VIEW") {
                        system($dialog, ($wtmode ? "--scrolltext" : "--clear" ), "--title", gettext("module-assistant, log file viewer"), "--textbox", $file, 21, 78);
                     }
                     elsif($defsel eq "CONTINUE") {
                        $gui_loop=0;
                     }
                     elsif($defsel eq "STOP") {
                        close $dpipe;
                        return;
                     }
                  }
               }
               else { print $dpipe "100\nXXX\n" . sprintf(gettext("Build failed! See %s for details!"), $file) . "\nXXX\n"; }
            }
            close $dpipe;
            print STDERR sprintf(gettext("Done with %s ."), $deb) . "\n" if $deb;
         }
         else {
            $res = system $cmd;
            if( (!$opt_noninter) && $res) {
               print gettext("Build failed. Press Return to continue...") . "\n";
               ($opt_noninter || <STDIN>);
            }
            $ret += $res;
         }

         $blacklist{$pkg}=1 if $res;

         if(! pread($pkg, "echodebfile") && !$res) {
            # keep a fingerprint from "old" packages
            $fprfile = pread($pkg,"lastpkg");
            chomp($fprfile);
            $fprfile =~ s#/#_#g;
            $fprfile = "$var/$fprfile.txt";
            open(fpr, ">$fprfile");
            my $curpkgvers=pread($pkg, "cur_version"); chomp($curpkgvers);
            print fpr "$curpkgvers\n$KVERS\n$KDREV\n";
            close(fpr);
         }
      }
   }
}

sub install {
   my $pkg;
   SKIP: foreach $target (@_) {
      $pkg=complete_name($target);
      next SKIP if($blacklist{$pkg});
      &setvars;
      #print "D: ", keys %kernelvers, "\n";
      foreach $KVERS ((values %kernelvers), @extra_kvers) {
         &setvars;
         $deb=pread($pkg, "lastpkg");
         chomp($deb);
         if (length($deb) && -e $deb) {
            print "TODO: ".Cwd::abs_path($deb)."\n" if $opt_debug;
            push(@debs, Cwd::abs_path($deb));
         }
         else {
            my $pattern="$var/$pkg*buildlog*";
            printmsg sprintf(gettext("Package %s was not built successfully, see %s for details!"), $pkg, $pattern) . "\n";
            if ($command ne "auto-install" && $opt_nogui) {
               print gettext("You maybe want to run \"auto-install\" instead of install.") . "\n";
            }
         }
      }
   }
   $ret_save = $ret;
   withecho ($sudo, "dpkg", ($opt_force? "-i" : "-Ei"), @debs) if($#debs >= 0);
   if($ret > $ret_save) {
      $ret--;
      print STDERR "\nI: " . gettext("Direct installation failed, trying to post-install the dependencies") . "\n\n";
      $ret += withecho($sudo, $aptcmd, $opt_noninter?"-fy":"-f","install");
   }
}

sub clean {
   my $pkg;
   SKIP: foreach $target (@_) {
      $pkg=complete_name($target);
      next SKIP if( $installed_only && pexec($pkg, "installed"));
      $ret += pexec($pkg, "VERB", "clean");
   }
}

sub purge {
   my $pkg;
   SKIP: foreach $target (@_) {
      $pkg=complete_name($target);
      next SKIP if( $installed_only && pexec($pkg, "installed"));
      $ret += pexec($pkg, "VERB", "purge");
   }
}

sub list {
    print gettext("Warning, the cache is empty. You maybe wish to run the command \"module-assistant update\" first!") . "\n" if ("" eq <$var/*>);
   my $i;
   $retcode=1;
   my $tellsearch;
   PKG: foreach (sort @_) {
      $requested=$_;
      #syswrite(STDERR,'.') if(!$opt_quiet);
      $pkg=complete_name($_);
      
      # is i(nstall)ed or not?
      # 
      print "is it installed?\n" if $opt_debug;
      if(!pexec($pkg, "installed") ) {
         my $curpkgvers=pread($pkg, "cur_version"); chomp($curpkgvers);
         my $avpkgvers= pread($pkg, "avail_version"); chomp($avpkgvers);
         #printwrap "$pkg (source package installed";
         if($curpkgvers ne $avpkgvers) {
            printwrap sprintf(gettext("%s (source) available (not up-to-date, V: %s vs. %s)"), $pkg, $curpkgvers, $avpkgvers) . "\n";
         }
         else {
            printwrap sprintf(gettext("%s (source) installed (V: %s):"), $pkg, $curpkgvers) . "\n";
         }
      }
      elsif($installed_only) { # nichts damit machen
         next PKG;
      }
      else { # not installed but try the bins though
         printwrap sprintf(gettext("%s (source package not installed):"), $pkg) . "\n";
      }
      $retcode=0;

      my $binstring;
      foreach $KVERS ((values %kernelvers), @extra_kvers) {
          &setvars;
         $lastbin=pread($pkg, "lastpkg"); chomp($lastbin);
         $binstring .= 
         "   + ($KVERS): ";

         if(length($lastbin) >0 ) {
            $binstring .= ( $opt_verbose ? Cwd::abs_path($lastbin) : basename($lastbin))."\n";
         }
         elsif($opt_search) {
            my $packname = ((split(/-/, $pkg))[0]);
            if(@precomp=`apt-cache pkgnames $packname- | grep -- -$KVERS\$`)
            {
               # preset but try others if needed
               my $binpackage=$precomp[0];

               if($#precomp > 0) {
                  $shortname=$pkg;
                  $shortname=~s/-(source|src)$//;
                  # stupid similar looking names
                  for(@precomp) {
                     if(/$shortname-$KVERS/) {
                        $binpackage=$_;
                        last;
                     }
                  }
               }
               if(`apt-cache show $binpackage`=~/Filename:/) {
                  $binstring .= gettext("not found, possible candidate(s) installable with $aptcmd:") . "\n\t";
               }
               else {
                  printwrap gettext("package not found, but following is already installed:") . "\n\t";
               }
               $binstring .= join("\n\t", @precomp);
            }
         }
         else {
            $binstring .= gettext("not found") . "\n";
            $tellsearch++;
         }
      }
      if(length($binstring)) {
         printwrap "  " . gettext("-- Binary package(s) for kernel(s):") . "\n$binstring";
         #printwrap (($tellsearch>1 ? "Some packages were not found" : "One package could not be found").". Use the \"search\" command to look in the pool.\n") if($tellsearch && !$opt_quiet);
      }
#      else
#      {
#         
#         printwrap "  -- No binary packages found" . (!$opt_search && 
#         " (use the \"search\" command to look in the pool)")."\n" if(!$opt_quiet);
#      }
      
      $i++;
      #printwrap "\n";
   }
   if($tellsearch) {
      my($orgcolumns) = $columns;
      $columns -= 4;
      printwrap wrap('', '', gettext("Some packages could not be found. The \"search\" command can search in the package pool for precompiled packages.")) . "\n";
      $columns = $orgcolumns;
   }
   if(!$i) {
      printwrap gettext("No data? You maybe want to run \"module-assistant update\" first.") . "\n" ;
      $ret++;
   }
   return $retcode;
}

sub argv_expand {
#   @ARGV= grep { !system "$packs{$_} installed" } keys %packs ;
   @ARGV=split(/,|\ /,join(',',@ARGV));
   if ($ARGV[0] eq "all") {
      @ARGV=sort(keys %packs);
   } 
   elsif ($ARGV[0] eq "alli") {
      @ARGV=sort(keys %packs);
      $installed_only=1;
   }
   elsif ($ARGV[0] eq "allu") {
      @ARGV=lsd($modloc);
   }
}

sub init_packs_desc {
   # allow control scripts to preset descriptions
   open($descfile, "<$var/descriptions");
   while(<$descfile>) {
      if(/([^:]+):\ ?(.*)/) {
         $packsdesc{$1}=$2;
         last;
      }
   }
   close($descfile);
   for $source (keys %packs) {
      $shortname=$source;
      $shortname=~s/-(source|src)$//;
      if(!defined($packsdesc{$shortname})) {
         # accidentaly named after -source package
         if(defined($packsdesc{$source})) {
            $namefound = $packsdesc{$source};
            delete $packsdesc{$source};
         }
         else {
            # precache once with cummulative apt-get run
            if(!(keys %descache)) {
               open($getdesc, "apt-cache show ".join(' ',keys %packs)." 2>/dev/null |");
               while(<$getdesc>) { 
                  $pkg=$1 if(/^Package: (.*)\n/);
                  if(/^Description: (.*)\n/) {
                     $descache{$pkg}=$1;
                  }
               }
               close($getdesc);
            }
            $namefound=$descache{$source};
         }
         $namefound=~s/\(source.*\)//i;
         $namefound=~s/(source)?\.?$//i;
         $namefound=~s/^(driver|module)?.?sources? (code )?(for|of)? (the )?//i;
         # and if there still nothing, it will be an empty description
         $packsdesc{$shortname} = $namefound;
      }
   }
   open($descfile, ">$var/descriptions");
   for(keys %packsdesc) {
      print $descfile $_.": ".$packsdesc{$_}."\n";
   }
   close($descfile);
   delete $packsdesc{""}; # wherever it comes from
}

sub isfullsrc {
   $src=$_[0];
   return ( (!-l "$src/arch") && (countList(<$src/arch/*>) > 1) );
}

sub fakesrc {
   my $kvers=$_[0];
   my $kpkg = get_kpackage($kvers)."-image-".$kvers;
   my $knmbr=$kvers;
   $knmbr=~s/^([\d\.]+)(.*)/$1/;
   my $extra=$2;
   my $writedir=(-d $opt_userdir)?$opt_userdir."/usr_src":$usrc;
   my $confile="/boot/config-$kvers";
   my $kheaders=get_kpackage($kvers)."-headers";
   my $ksource=get_kpackage($kvers)."-source";
   my $symverfile="$usrc/$kheaders-$kvers/Module.symvers";
   my $compileh="$usrc/$kheaders-$kvers/include/linux/compile.h";
   print gettext("Experimental kernel source recreating method...\nGetting source...") . "\n";
   return 0 if withecho($sudo, $aptcmd, ($opt_noninter?"-y":undef), "install", "$ksource-$knmbr");
   if(! -f $confile) {
      print gettext("Config not found, getting headers to extract the config...") . "\n";
      return 0 if withecho($sudo, $aptcmd, ($opt_noninter?"-y":undef), "install", "$kheaders-$kvers");
      $confile="$usrc/$kheaders-$kvers/.config";
   }
   $tmpdir="$writedir/tmp-".rand;
   mkdir $tmpdir;
   # show the user what's going on
   print gettext("Extracting pristine kernel source, please wait...") . "\n";
   return 0 if withecho("tar", "jxf", "$writedir/$ksource-$knmbr.tar.bz2", "-C", $tmpdir);
   print gettext("Installing to final location and configuring, please wait...") . "\n";
   withecho "mv", "$tmpdir/$ksource-$knmbr", "$writedir/$ksource-$kvers";
   withecho "cp", $confile, "$writedir/$ksource-$kvers/.config";
   if (-f $symverfile) {
      withecho "cp", $symverfile, "$writedir/$ksource-$kvers/Module.symvers";
   }
   if (-f $compileh) {
      withecho "cp", $compileh, "$writedir/$ksource-$kvers/include/linux/compile.h";
   }
   rmdir $tmpdir;
   if($extra) {
      open(mk,"<$writedir/$ksource-$kvers/Makefile");
      while(<mk>) {
         if($extra && s/^EXTRAVERSION.*/EXTRAVERSION=$extra\n/)
         {
            undef($extra);
         }
         push(@mkcont,$_);
      }
      close(mk);
      open(mk,">$usrc/$ksource-$kvers/Makefile");
      print mk @mkcont;
      close(mk);
   }

   if(0 != withecho("make", "-C", "$usrc/$ksource-$kvers" , "prepare", "modules_prepare")) {
       withecho("make", "-C", "$usrc/$ksource-$kvers" , "oldconfig", "dep");
   }

   print "\n" . wrap('', '', sprintf(gettext("Faked kernel source for the Kernel %s.\nWarning: the configuration may not match the running kernel."), $kvers)) . "\n\n";
   &initksrc;
}
#die "FIXME, hier oben";

#$maxlen=0;
#foreach $key (keys %packs) {
#   $maxlen = length($key) if (length($key) > $maxlen);
#}
#print @output;

# things that belong together:
# Kernel version of some directory
# $kernelvers{"directory"}= VERSION-NUMBER
# Directory to some kernel version
# $kerneldirs{VERSION-NUMBER} = "directory"
sub initksrc {
   # so initialise them
   undef %kernelvers;
   undef %kerneldirs;
   undef @extra_kvers;
   
   foreach(@opt_kerneldirs) {
      if(-d $_) {
          print "PROBEKDIR: $_\n" if $opt_debug;
         open($versionh, "<$_/include/generated/utsrelease.h")||
         open($versionh, "<$_/include/linux/utsrelease.h")||
         open($versionh, "<$_/include/linux/version.h");
         <$versionh> =~ /"(.+)"/;
         if(close($versionh)) {
            $kernelvers{$_}=$1;
            $kerneldirs{$1}=$_;
         }
         elsif(-r "$_/Makefile") {
            printmsg sprintf(gettext("Warning, %s seems to contain unconfigured kernel source (see manpage for details)!"), $_) if !$opt_quiet;
            $kernelwarned=1;
         }
         elsif(!-r $_ || !-x $_) {
            printmsg sprintf(gettext("Warning, could not access the %s directory!"), $_) . "\n" if !$opt_quiet;
            $kernelwarned=1;
         }
         else {
            printmsg sprintf(gettext("Warning, %s does not contain a valid kernel source tree, skipping!"), $_) . "\n" if !$opt_quiet;
            $kernelwarned=1;
         }
      }
   }
   # now go trough the user-specified kverslist  (skipping kvers for
   # user-specified directories) and look for for the appropriate kernel
   # headers for the rest

   HAVEIT: foreach $kvers (@opt_kverslist) {
      next HAVEIT if(defined($kerneldirs{$kvers}));
      my $kheaders=get_kpackage($kvers)."-headers";
      LOOKUP: foreach $poskdir ("/lib/modules/$kvers/build", "/lib/modules/$kvers/source", <$opt_userdir/usr_src/*>, "$usrc/linux", "$usrc/$kheaders-$kvers", <$usrc/*>, </usr/local/src/*>) {
         if(defined($poskdir) && -d $poskdir) {
            if(!-x $poskdir) {
               if(!$opt_quiet) {
                  my $msg=sprintf(gettext("Warning, could not access the %s directory!"), $poskdir);
                  if($opt_userdir) { printmsg $msg if !$ksrcstfu; $ksrcstfu=1 } else { print $msg if $opt_verbose; }
               }
            }
            else {
               if(-e "$poskdir/include/linux/version.h") {
                  open($versionh, "<$poskdir/include/generated/utsrelease.h") ||
                  open($versionh, "<$poskdir/include/linux/utsrelease.h") ||
                  open($versionh, "<$poskdir/include/linux/version.h");
                  <$versionh> =~ /"(.+)"/;
                  push(@seenkvers, "$1\n");
                  if($1 eq $kvers) {
                     if($kerneldirs{$kvers}) {
                        if(isfullsrc($poskdir)) {
                           # we have a dupe and the new one looks like better source
                           # 
                           # drop the previous one
                           print "D: $kvers dupe, prefer the one from $poskdir\n" if $opt_debug;
                           delete $kernelvers{$kerneldirs{$kvers}};
                           $kernelvers{$poskdir}=$kvers;
                           $kerneldirs{$kvers}=$poskdir;
                           last LOOKUP;
                        }
                        # just ignore otherwise
                     }
                     else {
                        $kernelvers{$poskdir}=$kvers;
                        $kerneldirs{$kvers}=$poskdir;
                     }
                  }
               }
#               elsif(-r "$poskdir/include/linux" && -r "$poskdir/Makefile") {
#                  printmsg sprintf(gettext("Warning, %s seems to contain unconfigured kernel source!"), $poskdir) if !$opt_quiet;
#               }
            }
         }
      }
   }
   # finaly, go trough @opt_kverslist and push versions with no source to
   # @extra_kvers
   for(@opt_kverslist) {
      if(!defined($kerneldirs{$_})) {
         push(@extra_kvers, $_);
      }
   }
  #print "valid: ", (keys %kerneldirs), " extra: ", @extra_kvers if($opt_debug);
}

&initksrc;
&argv_expand;

### MAIN part ###
sub do_stuff {

   my $cmd=$_[0];
   if($cmd eq "list" || $cmd eq "list-available" || $cmd eq "la") {
      if($#ARGV<0) { $ARGV[0]="all" ; &argv_expand}
      &list(@ARGV);
   }
   elsif($cmd eq "search") {
      if($#ARGV<0) { $ARGV[0]="all" ; &argv_expand}
      $opt_search=1;
      &list(@ARGV);
   }
   elsif($cmd eq "list-installed" || $cmd eq "l-i" || $cmd eq "li") {
      if($#ARGV<0) { $ARGV[0]="alli" ; &argv_expand}
      &list(@ARGV);
   }
   elsif($cmd eq "get") {
      &help if($#ARGV<0);
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &get(@ARGV);
   }
   elsif($cmd eq "unpack") {
      &help if($#ARGV<0);
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &unp(@ARGV);
   }
   elsif($cmd eq "build") {
      $opt_nogui = 0 if $wtmode; # whiptail's gauge sucks
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &build(@ARGV);
   }
   elsif($cmd eq "update") {
      if($#ARGV<0) { $ARGV[0]="all" ; &argv_expand}
      &up(@ARGV);
   }
   elsif($cmd eq "prepare") {
       &prep();
       initksrc();
   }
   elsif($cmd eq "auto-install" || $cmd eq "ai" || $cmd eq "a-i") {
      &help if($#ARGV<0);
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      if($#ARGV<0) { $ARGV[0]="all" ; &argv_expand}
      @tmp=@ARGV; # workaround for a funny bug, up() alters the data somehow
      &up(@tmp);
      &prep();
      &initksrc();
      &get(@ARGV);
      &build(@ARGV);
      &install(@ARGV);
   }
   elsif($cmd eq "auto-build" || $cmd eq "ab" || $cmd eq "a-b") {
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &get(@ARGV);
      &build(@ARGV);
   }
   elsif($cmd eq "build-install" || $cmd eq "b-i") {
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &build(@ARGV);
      &install(@ARGV);
   }
   elsif($cmd eq "install") {
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &install(@ARGV);
   }
   elsif($cmd eq "clean") {
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &clean(@ARGV);
   }
   elsif($cmd eq "purge") {
      die gettext("Do you really wish to remove all binary packages?\nIf so, use the --force option.") . "\n" if(!$opt_force);
      die gettext("No package specified. STOP.") . "\n" if($#ARGV<0);
      &purge(@ARGV);
   }
   elsif($cmd eq "fakesource" || $cmd eq "fakersrc" || $cmd eq "fakersource") {
      #$ARGV[0]=$my_kvers if($#ARGV < 0);
      &fakesrc($_) for(@opt_kverslist);
   }
   elsif(!$gui_done) {
      $gui_done=1;

      # bounce with error message if there is no gui, otherwise work with dialog
      &help() if ($opt_nogui || !$dialog);

      print STDERR gettext("Starting the Dialog UI...") . "\n";
      chomp($tmpname=`mktemp`);
      $gui_loop=1;
      $defsel="OVERVIEW";
      GUI: while($gui_loop) {
         my($orgcolumns) = $columns;
         $columns = 65;
         open($intro, "$dialog --default-item $defsel --clear --title ".'"' . gettext("module-assistant, interactive mode") . '" '.($wtmode?"":" --aspect 5 ").' --menu "' . wrap('', '', gettext("Welcome to the dialog frontend of module-assistant. This user interface provides access to the few commands of this program.")) . '\n\n' . wrap('', '', gettext("If you wish to learn more, choose the OVERVIEW option.")) . '\n\n' . wrap('', '', gettext("You should better run UPDATE once before you proceed.") . " " . gettext("If you wish to look for existing module packages for your needs or wish to compile a new one from source, choose them in the SELECT dialog and continue with possible commands.")) . '\n\n" 22 '.$columns.' 5 OVERVIEW "' . gettext("Show all possible command line commands") . '" UPDATE "' . gettext("Update the cached package information") . '" PREPARE "' . gettext("Configure the system to compile modules") . '" "SELECT" "' . gettext("Select the module/source packages to work on") . '" "EXIT" "' . gettext("Exit the program") . '" 2>&1 >/dev/tty |');
         $columns = $orgcolumns;
         @out = <$intro>;
         close($intro);
         $dialog_ret= ($? >> 8);
         last GUI if($dialog_ret);
         die gettext("Dialog command not working correctly!") . "\n" if($#out != 0);
         $defsel=$out[0];
         if($defsel eq "OVERVIEW") {
            open($tmpfile, ">$tmpname");
            print $tmpfile $helpmsg;
            close($tmpfile);
            system($dialog, ($wtmode ? "--scrolltext" : "--clear" ), "--title", gettext("module-assistant, command overview"), "--textbox", $tmpname, $rows-2, $columns-1);
            unlink $tmpname;
         }
         elsif($defsel eq "UPDATE") {
            up();
         }
         elsif($defsel eq "PREPARE") {
            prep();
            print STDERR "\n\n" . gettext("Press Return to continue...");
            ($opt_noninter || <STDIN>);
            initksrc();
            #goto restart;
         }
         elsif($defsel eq "SELECT") {
            &init_packs_desc();
            %packsel = %packsdesc;
            for(keys %packsel) { $packsel{$_}="off"};

            SELECTION: while(1) {
               my $tmpstring = $dialog.' --clear --title "' . gettext("module-assistant, package selection") . '" --checklist "\n' . wrap('', '', gettext("Please select the interesting module (source) packages.")) . '\n' . wrap('', '', gettext("Use Cursor keys to browse, Space to select and Return to continue.")) . '\n' . wrap('', '', gettext("Cancel to return to the main menu.")) . '" '. ($rows - 4) . ' 70 ' . ($rows-15);
               for(sort(keys %packsel)) {
                  $tmpstring .= " $_ \"".$packsdesc{$_}.'" '.$packsel{$_};
               }
               $tmpstring .= ' 2>&1 >/dev/tty |';
               #die "jo, $tmpstring";
               open($select, $tmpstring);
               @out = <$select>;
               close $select;
               last SELECTION if($? >> 8);
#            die gettext("Dialog command not working correctly!") . "\n" if($#out != 0);
               $selection=$out[0];
               $selection=~s/\"//g;
               @selected=split(/\ /,$selection);
               for(@selected) { $packsel{$_}="on"};
               next SELECTION if($#selected < 0);

               ACTION: while(1) {
                  $tmpstring = $dialog.' --clear --title "' . gettext("module-assistant, interactive mode") . '" --menu "' . gettext("You have selected the following packages:") . '\n\n'
                  .join(', ', @selected)
                  .'\n\n' . gettext("Choose one of the following commands to proceed or Cancel to return to the selection menu.") . '\n\n" 18 65 6 LIST "' . gettext("List installed (binary) packages") . '" SEARCH "' . gettext("List and search with apt-cache") . '" GET "' . gettext("Get or update the source package") . '" "BUILD" "' . gettext("Compiles module packages for the current kernel") . '" INSTALL "' . gettext("Installs the packages for the current kernel") . '" BACK "' . gettext("Returns to the module selection") . '" 2>&1 >/dev/tty |';
                  open($select, $tmpstring);
                  @out = <$select>;
                  close $select;
                  last SELECTION if($? >> 8);
                  $selection=$out[0];
                  if($selection eq "LIST" | $selection eq "SEARCH") {
                     $opt_search=1 if($selection eq "SEARCH");
                     undef $printbuf;
                     $catchprint=1;
                     list(@selected);
                     undef $catchprint;
                     open($tmpfile, ">$tmpname");
                     print $tmpfile $printbuf;
                     close($tmpfile);
                     system($dialog, "--title", gettext("module-assistant, present packages"), "--textbox", $tmpname, 21, 78);
                     unlink $tmpname;

                     undef $opt_search;
                  }
                  elsif($selection eq "GET") {
                     get(@selected);
                  }
                  elsif($selection eq "BUILD") {
                     my $instatus;
                     for(@selected) {$instatus += pexec(complete_name($_), "installed") };
                     my($orgcolumns) = $columns;
                     $columns = 56;
                     if($instatus && !system($dialog, "--title", gettext("module-assistant, source installation"), "--yesno", wrap('', '', gettext("The source package may not to be installed. Would you like to install or upgrade selected source packages now?")), 10, 60)) {
                        get(@selected);
                     }
                     $columns = $orgcolumns;
                     my $retold=$ret;
                     build(@selected);
                     #if($ret > $retold) {
                        #   printmsg "The build was not successful! See /var/cache/modass/*buildlog* for more details.";
                        #}
                     if($retold == $ret && !system($dialog, "--title", gettext("module-assistant, package installation"), "--yesno", gettext("Would you like to install the created module package(s) now?"), 7, 60)) {
                        install(@selected);
                     }


                  }
                  elsif($selection eq "INSTALL") {
                     install(@selected);
                  }
                  else {
                     next SELECTION;
                  }
               }
            }
         }
         else {
            exit;
         }
      }
   }
}

if( !(`id -u`=~/^0/) && !$opt_userdir ) {
   if(`groups`=~/(^| )src(\ |$)/) {
      $opt_userdir="$usrc/modass";
      my($orgcolumns) = $columns;
      $columns -= 4;
      printmsg sprintf(gettext("NOTE: You are not root but member of the src group. Mapping the base working directory to \"%s\"."), $opt_userdir) if !$opt_quiet;
      $columns = $orgcolumns;
      if(!-w $opt_userdir) {
         mkdir $opt_userdir;
      }
      if(!-w $opt_userdir) {
         my($orgcolumns) = $columns;
         $columns -= 4;
         printmsg sprintf(gettext("You are member of the src group but the replacement directory %s could not be created or is not writeable."), $opt_userdir) if !$opt_quiet;
         $columns = $orgcolumns;
         exit 254;
      }
      goto restart;
   }
   else {
      my($orgcolumns) = $columns;
      $columns -= 4;
      printmsg gettext("You are not root and no replacement directory (the -u option) is specified. Unable to continue.") if !$opt_quiet;
      $columns = $orgcolumns;
      exit 254;
   }
}

$command="somethinginvalid" if !$command;

for(split(/,/, $command)) { do_stuff($_) }

ende();

__END__