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package standalone; # $Id$

use c;
use strict;
use common qw(N if_);
use Config;

#- for sanity (if a use standalone is made during install, MANY problems will happen)
require 'log.pm'; #- "require log" causes some pb, perl thinking that "log" is the log() function
if ($::isInstall) {
    log::l('ERROR: use standalone made during install :-(');
    log::l('backtrace: ' . backtrace());
}
$::isStandalone = 1;

$ENV{SHARE_PATH} ||= "/usr/share";

c::setlocale();
c::bindtextdomain('libDrakX', "/usr/share/locale");

$::license = N("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.
");

my $progname = common::basename($0);

my %usages = (
           'diskdrake' => "[--{" . join(",", qw(hd nfs smb dav removable fileshare)) . "}]",
           'drakbackup' => N("[--config-info] [--daemon] [--debug] [--default] [--show-conf]
Backup and Restore application

--default             : save default directories.
--debug               : show all debug messages.
--show-conf           : list of files or directories to backup.
--config-info         : explain configuration file options (for non-X users).
--daemon              : use daemon configuration. 
--help                : show this message.
--version             : show version number.
"),
           'drakbug' => N("[OPTIONS] [PROGRAM_NAME]

OPTIONS:
  --help            - print this help message.
  --report          - program should be one of mandrake tools
  --incident        - program should be one of mandrake tools"),
           'drakfont' => N("Font Importation and monitoring application                                     
--windows_import : import from all available windows partitions.
--xls_fonts      : show all fonts that already exist from xls
--strong         : strong verification of font.
--install        : accept any font file and any directry.
--uninstall      : uninstall any font or any directory of font.
--replace        : replace all font if already exist
--application    : 0 none application.
                 : 1 all application available supported.
                 : name_of_application like  so for staroffice 
                 : and gs for ghostscript for only this one."),
           'draksec' => "[--debug]
--debug: print debugging information",
           'drakTermServ' => N("[OPTIONS]...
Mandrake Terminal Server Configurator
--enable         : enable MTS
--disable        : disable MTS
--start          : start MTS
--stop           : stop MTS
--adduser        : add an existing system user to MTS (requires username)
--deluser        : delete an existing system user from MTS (requires username)
--addclient      : add a client machine to MTS (requires MAC address, IP, nbi image name)
--delclient      : delete a client machine from MTS (requires MAC address, IP, nbi image name)"),
	      'drakxtv' => "[--no-guess]",
	      'drakupdate_fstab' => " [--add | --del] <device>\n",
	      'keyboardrake' => N("[keyboard]"),
           'logdrake' => N("[--file=myfile] [--word=myword] [--explain=regexp] [--alert]"),
           'net_monitor' => N("[OPTIONS]
Network & Internet connection and monitoring application

--defaultintf interface : show this interface by default
--connect : connect to internet if not already connected
--disconnect : disconnect to internet if already connected
--force : used with (dis)connect : force (dis)connection.
--status : returns 1 if connected 0 otherwise, then exit.
--quiet : don't be interactive. To be used with (dis)connect."),
	      'printerdrake' => N(" [--skiptest] [--cups] [--lprng] [--lpd] [--pdq]"),
	      'rpmdrake' => N("[OPTION]...
  --no-confirmation      don't ask first confirmation question in MandrakeUpdate mode
  --no-verify-rpm        don't verify packages signatures
  --changelog-first      display changelog before filelist in the description window
  --merge-all-rpmnew     propose to merge all .rpmnew/.rpmsave files found"),
           'scannerdrake' => N("[--manual] [--device=dev] [--update-sane=sane_source_dir] [--update-usbtable] [--dynamic=dev]"),
	      'XFdrake' => N(" [everything]
       XFdrake [--noauto] monitor
       XFdrake resolution"),
	      );

$usages{$_} = $usages{rpmdrake} foreach qw(rpmdrake-remove MandrakeUpdate);
$usages{Xdrakres} = $usages{XFdrake};


my ($i, @new_ARGV);
foreach (@ARGV) {
    $i++;
    if (/^-(-help|h)$/) {
	version();
	print STDERR N("\nUsage: %s  [--auto] [--beginner] [--expert] [-h|--help] [--noauto] [--testing] [-v|--version] ", $progname),  if_($usages{$progname}, $usages{$progname}), "\n";
#    print N("\nUsage: "), $::usage, "\n" if $::usage;
	exit(0);
    } elsif (/^-(-version|v)$/) {
	version();
	exit(0);
    } elsif (/^--embedded$/) {
	($::XID, $::CCPID) = splice @ARGV, $i, 2;
	$::isEmbedded = 1;
    } elsif (/^--expert$/) {
	$::expert = 1;
    } elsif (/^--noauto$/) {
	$::noauto = /-noauto/;
    } elsif (/^--auto$/) {
	$::auto = 1;
    } elsif (/^--testing$/) {
	$::testing = 1;
    } elsif (/^--beginner$/) {
	$::expert = 0;
    } else {
	push @new_ARGV, $_;
    }
}

@ARGV = @new_ARGV;


sub version {
    print STDERR "Drakxtools version 9.1.0
Copyright (C) 1999-2002 MandrakeSoft by <install\@mandrakesoft.com>
",  $::license, "\n";
}

################################################################################
package pkgs_interactive;

use run_program;
use common;
require 'log.pm';

our @ISA = qw(); #- tell perl_checker this is a class

sub interactive::do_pkgs {
    my ($in) = @_;
    bless { in => $in }, 'pkgs_interactive';
}

sub install {
    my ($o, @l) = @_;

    return 1 if is_installed($o, @l);

    my $wait;
    if ($o->{in}->isa('interactive::newt')) {
	$o->{in}->suspend;
    } else {
	$wait = $o->{in}->wait_message('', N("Installing packages..."));
    }
    log::explanations("installed packages @l");
    my $ret = system('urpmi', '--allow-medium-change', '--auto', '--best-output', @l) == 0;

    if ($o->{in}->isa('interactive::newt')) {
	$o->{in}->resume;
    } else {
	undef $wait;
    }
    $ret;
}

sub ensure_is_installed {
    my ($o, $pkg, $file, $auto) = @_;

    if (! -e $file) {
	$o->{in}->ask_okcancel('', N("The package %s needs to be installed. Do you want to install it?", $pkg), 1) 
	  or return if !$auto;
	$o->{in}->do_pkgs->install($pkg);
    }
    if (! -e $file) {
	$o->{in}->ask_warn('', N("Mandatory package %s is missing", $pkg));
	return;
    }
    1;
}

sub what_provides {
    my ($_o, $name) = @_;
    my ($what) = split '\n', `urpmq '$name' 2>/dev/null`;
    split '\|', $what;
}

sub is_installed {
    my ($_o, @l) = @_;
    run_program::run('/bin/rpm', '>', '/dev/null', '-q', @l);
}

sub are_installed {
    my ($_o, @l) = @_;
    my @l2;
    run_program::run('/bin/rpm', '>', \@l2, '-q', '--qf', "%{name}\n", @l);
    intersection(\@l, [ map { chomp_($_) } @l2 ]);
}

sub remove {
    my ($o, @l) = @_;
    $o->{in}->suspend;
    log::explanations("removed packages @l");
    my $ret = system('rpm', '-e', @l) == 0;
    $o->{in}->resume;
    $ret;
}

sub remove_nodeps {
    my ($o, @l) = @_;
    $o->{in}->suspend;
    log::explanations("removed (with --nodeps) packages @l");
    my $ret = system('rpm', '-e', '--nodeps', @l) == 0;
    $o->{in}->resume;
    $ret;
}

################################################################################


package standalone;

#- stuff will go to special /var/log/explanations file
my $standalone_name;
sub explanations { log::explanations("@_") }

our @common_functs = qw(renamef linkf symlinkf output substInFile mkdir_p rm_rf cp_af touch setVarsInSh setExportedVarsInSh setExportedVarsInCsh update_gnomekderc);
our @builtin_functs = qw(chmod chown unlink link symlink rename system);
our @drakx_modules = qw(Xconfig::card Xconfig::default Xconfig::main Xconfig::monitor Xconfig::parse Xconfig::proprietary Xconfig::resolution_and_depth Xconfig::screen Xconfig::test Xconfig::various Xconfig::xfree Xconfig::xfree3 Xconfig::xfree4 Xconfig::xfreeX any bootloader bootlook c class_discard commands crypto detect_devices devices diskdrake diskdrake::hd_gtk diskdrake::interactive diskdrake::removable diskdrake::removable_gtk diskdrake::smbnfs_gtk fs fsedit http keyboard lang log loopback lvm modules::parameters modules mouse my_gtk network network::adsl network::ethernet network::isdn_consts network::isdn network::modem network::netconnect network::network network::nfs network::smb network::tools partition_table partition_table_bsd partition_table::dos partition_table::empty partition_table::gpt partition_table::mac partition_table::raw partition_table::sun printer printerdrake proxy raid run_program scanner services steps swap timezone network::drakfirewall network::shorewall);

$SIG{SEGV} = sub { my $progname = $0; $progname =~ s|.*/||; exec("drakbug --incident $progname") };

sub import {
    ($standalone_name = $0) =~ s|.*/||;
    c::openlog($standalone_name."[$$]");
    explanations('### Program is starting ###');

    eval "*MDK::Common::$_ = *$_" foreach @common_functs;

    foreach my $f (@builtin_functs) {
	eval "*$_"."::$f = *$f" foreach @drakx_modules;
	eval "*".caller()."::$f = *$f";
    }
}


sub renamef {
    explanations "moved file $_[0] to $_[1]";
    goto &MDK::Common::File::renamef;
}

sub linkf {
    explanations "hard linked file $_[0] to $_[1]";
    goto &MDK::Common::File::linkf;
}

sub symlinkf {
    explanations "symlinked file $_[0] to $_[1]";
    goto &MDK::Common::File::symlinkf;
}

sub output {
    explanations "created file $_[0]";
    goto &MDK::Common::File::output;
}

sub substInFile(&@) {
    explanations "modified file $_[1]";
    goto &MDK::Common::File::substInFile;
}

sub mkdir_p {
    explanations "created directory $_[0] (and parents if necessary)";
    goto &MDK::Common::File::mkdir_p;
}

sub rm_rf {
    explanations "removed files/directories (recursively) @_";
    goto &MDK::Common::File::rm_rf;
}

sub cp_af {
    my $retval = MDK::Common::File::cp_af(@_);
    my $dest = pop @_;
    explanations "copied recursively @_ to $dest";
    return $retval;
}

sub touch {
    explanations "touched file @_";
    goto &MDK::Common::File::touch;
}

sub setVarsInSh {
    explanations "modified file $_[0]";
    goto &MDK::Common::System::setVarsInSh;
}

sub setExportedVarsInSh {
    explanations "modified file $_[0]";
    goto &MDK::Common::System::setExportedVarsInSh;
}

sub setExportedVarsInCsh {
    explanations "modified file $_[0]";
    goto &MDK::Common::System::setExportedVarsInCsh;
}

sub update_gnomekderc {
    explanations "modified file $_[0]";
    goto &MDK::Common::System::update_gnomekderc;
}


sub chmod {
    my $retval = CORE::chmod(@_);
    my $mode = shift @_;
    explanations sprintf("changed mode of %s to %o", $_, $mode) foreach @_;
    return $retval;
}

sub chown {
    my $retval = CORE::chown(@_);
    my $uid = shift @_;
    my $gid = shift @_;
    explanations sprintf("changed owner of $_ to $uid.$gid") foreach @_;
    return $retval;
}

sub unlink {
    explanations "removed files/directories @_";
    CORE::unlink(@_);
}

sub link {
    explanations "hard linked file $_[0] to $_[1]";
    CORE::link($_[0], $_[1]);
}

sub symlink {
    explanations "symlinked file $_[0] to $_[1]";
    CORE::symlink($_[0], $_[1]);
}

sub rename {
    explanations "renamed file $_[0] to $_[1]";
    CORE::rename($_[0], $_[1]);
}

sub system {
    explanations "launched command: @_";
    CORE::system(@_);
}

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package urpm;

# $Id$

use strict;
use MDK::Common;
use File::Find ();
use urpm::msg;
use urpm::download;
use urpm::util;
use urpm::sys;
use urpm::cfg;

our $VERSION = '4.7.3';
our @ISA = qw(URPM);

use URPM;
use URPM::Resolve;
use POSIX;

BEGIN {
    # this won't work in 5.10 when encoding::warnings will be lexical
    if ($ENV{DEBUG_URPMI}) {
	require encoding::warnings;
	encoding::warnings->import;
    }
}

#- create a new urpm object.
sub new {
    my ($class) = @_;
    my $self;
    $self = bless {
	# from URPM
	depslist   => [],
	provides   => {},

	config     => "/etc/urpmi/urpmi.cfg",
	skiplist   => "/etc/urpmi/skip.list",
	instlist   => "/etc/urpmi/inst.list",
	statedir   => "/var/lib/urpmi",
	cachedir   => "/var/cache/urpmi",
	media      => undef,
	options    => {},

	#- sync: first argument is options hashref, others are urls to fetch.
	sync       => sub { $self->sync_webfetch(@_) },
	fatal      => sub { printf STDERR "%s\n", $_[1]; exit($_[0]) },
	error      => sub { printf STDERR "%s\n", $_[0] },
	log        => sub { printf "%s\n", $_[0] },
	ui_msg     => sub {
	    $self->{log}($_[0]);
	    ref $self->{ui} && ref $self->{ui}{msg} and $self->{ui}{msg}->($_[1]);
	},
    }, $class;
    $self->set_nofatal(1);
    $self;
}

#- syncing algorithms.
#- currently wget and curl methods are implemented; trying to find the best
#- (and one which will work :-)
sub sync_webfetch {
    my $urpm = shift @_;
    my $options = shift @_;
    my %files;
    #- currently ftp and http protocols are managed by curl or wget,
    #- ssh and rsync protocols are managed by rsync *AND* ssh.
    foreach (@_) {
	/^([^:_]*)[^:]*:/ or die N("unknown protocol defined for %s", $_);
	push @{$files{$1}}, $_;
    }
    if ($files{removable} || $files{file}) {
	eval {
	    sync_file($options, @{$files{removable} || []}, @{$files{file} || []});
	};
	$urpm->{fatal}(10, $@) if $@;
	delete @files{qw(removable file)};
    }
    if ($files{ftp} || $files{http} || $files{https}) {
	my @webfetch = qw(curl wget);
	my @available_webfetch = grep { -x "/usr/bin/$_" } @webfetch;
	my $preferred;
	#- use user default downloader if provided and available
	my $option_downloader = $urpm->{options}{downloader}; #- cmd-line switch
	if (!$option_downloader && $options->{media}) { #- per-media config
	    (my $m) = grep { $_->{name} eq $options->{media} } @{$urpm->{media}};
	    ref $m && $m->{downloader} and $option_downloader = $m->{downloader};
	}
	#- global config
	!$option_downloader && exists $urpm->{global_config}{downloader}
	    and $option_downloader = $urpm->{global_config}{downloader};
	if ($option_downloader) {
	    $preferred = find { $_ eq $option_downloader } @available_webfetch;
	}
	#- else first downloader of @webfetch is the default one
	$preferred ||= $available_webfetch[0];
	if ($preferred eq 'curl') {
	    sync_curl($options, @{$files{ftp} || []}, @{$files{http} || []}, @{$files{https} || []});
	} elsif ($preferred eq 'wget') {
	    sync_wget($options, @{$files{ftp} || []}, @{$files{http} || []}, @{$files{https} || []});
	} else {
	    die N("no webfetch found, supported webfetch are: %s\n", join(", ", @webfetch));
	}
	delete @files{qw(ftp http https)};
    }
    if ($files{rsync}) {
	sync_rsync($options, @{$files{rsync} || []});
	delete $files{rsync};
    }
    if ($files{ssh}) {
	my @ssh_files;
	foreach (@{$files{ssh} || []}) {
	    m|^ssh://([^/]*)(.*)| and push @ssh_files, "$1:$2";
	}
	sync_ssh($options, @ssh_files);
	delete $files{ssh};
    }
    %files and die N("unable to handle protocol: %s", join ', ', keys %files);
}

our @PER_MEDIA_OPT = qw(
    downloader
    hdlist
    ignore
    key-ids
    list
    md5sum
    noreconfigure
    priority
    removable
    static
    synthesis
    update
    verify-rpm
    virtual
    with_hdlist
);

#- Loads /etc/urpmi/urpmi.cfg and performs basic checks.
#- Does not handle old format: <name> <url> [with <path_hdlist>]
#- options :
#-    - nocheck_access : don't check presence of hdlist and other files
sub read_config {
    my ($urpm, %options) = @_;
    return if $urpm->{media}; #- media already loaded
    $urpm->{media} = [];
    my $config = urpm::cfg::load_config($urpm->{config})
	or $urpm->{fatal}(6, $urpm::cfg::err);

    #- global options
    if ($config->{''}) {
	foreach my $opt (qw(
	    allow-force
	    allow-nodeps
	    auto
	    compress
	    downloader
	    excludedocs
	    excludepath
	    fuzzy
	    keep
	    key-ids
	    limit-rate
	    nopubkey
	    norebuild
	    post-clean
	    pre-clean
	    priority-upgrade
	    prohibit-remove
	    resume
	    retry
	    split-length
	    split-level
	    strict-arch
	    verify-rpm
	)) {
	    if (defined $config->{''}{$opt} && !exists $urpm->{options}{$opt}) {
		$urpm->{options}{$opt} = $config->{''}{$opt};
	    }
	}
    }
    #- per-media options
    foreach my $m (grep { $_ ne '' } keys %$config) {
	my $medium = { name => $m, clear_url => $config->{$m}{url} };
	foreach my $opt (@PER_MEDIA_OPT) {
	    defined $config->{$m}{$opt} and $medium->{$opt} = $config->{$m}{$opt};
	}
	$urpm->probe_medium($medium, %options) and push @{$urpm->{media}}, $medium;
    }

    eval { require urpm::ldap; urpm::ldap::load_ldap_media($urpm, %options) };

    #- load default values
    foreach (qw(post-clean verify-rpm)) {
	exists $urpm->{options}{$_} or $urpm->{options}{$_} = 1;
    }

    $urpm->{media} = [ sort { $a->{priority} <=> $b->{priority} } @{$urpm->{media}} ];

    #- remember if an hdlist or list file is already used
    my %filelists;
    foreach (@{$urpm->{media}}) {
	foreach my $filetype (qw(hdlist list)) {
	    if ($_->{$filetype}) {
		exists($filelists{$filetype}{$_->{$filetype}})
		    and $_->{ignore} = 1,
		    $urpm->{error}(
			$filetype eq 'hdlist'
			    ? N("medium \"%s\" trying to use an already used hdlist, medium ignored", $_->{name})
			    : N("medium \"%s\" trying to use an already used list, medium ignored",   $_->{name})
		    );
		$filelists{$filetype}{$_->{$filetype}} = undef;
	    }
	}
    }

    #- check the presence of hdlist and list files if necessary.
    unless ($options{nocheck_access}) {
	foreach (@{$urpm->{media}}) {
	    $_->{ignore} and next;
	    -r "$urpm->{statedir}/$_->{hdlist}" || -r "$urpm->{statedir}/synthesis.$_->{hdlist}" && $_->{synthesis}
		or $_->{ignore} = 1,
		$urpm->{error}(N("unable to access hdlist file of \"%s\", medium ignored", $_->{name}));
	    $_->{list} && -r "$urpm->{statedir}/$_->{list}" || defined $_->{url}
		or $_->{ignore} = 1,
		$urpm->{error}(N("unable to access list file of \"%s\", medium ignored", $_->{name}));
	}
    }

    #- read MD5 sums (usually not in urpmi.cfg but in a separate file)
    my $md5sum = $urpm->open_safe("<", "$urpm->{statedir}/MD5SUM");
    if ($md5sum) {
	while (<$md5sum>) {
	    my ($md5sum, $file) = /(\S*)\s+(.*)/;
	    foreach (@{$urpm->{media}}) {
		($_->{synthesis} ? "synthesis." : "") . $_->{hdlist} eq $file
		    and $_->{md5sum} = $md5sum, last;
	    }
	}
	close $md5sum;
    }

    #- remember global options for write_config
    $urpm->{global_config} = $config->{''};
}

#- probe medium to be used, take old medium into account too.
sub probe_medium {
    my ($urpm, $medium, %options) = @_;
    local $_;

    my $existing_medium;
    foreach (@{$urpm->{media}}) {
	$_->{name} eq $medium->{name} and $existing_medium = $_, last;
    }
    $existing_medium and $urpm->{error}(N("trying to bypass existing medium \"%s\", avoiding", $medium->{name})), return;
    
    $medium->{url} ||= $medium->{clear_url};

    if ($medium->{virtual}) {
	#- a virtual medium needs to have an url available without using a list file.
	if ($medium->{hdlist} || $medium->{list}) {
	    $medium->{ignore} = 1;
	    $urpm->{error}(N("virtual medium \"%s\" should not have defined hdlist or list file, medium ignored",
			     $medium->{name}));
	}
	unless ($medium->{url}) {
	    $medium->{ignore} = 1;
	    $urpm->{error}(N("virtual medium \"%s\" should have a clear url, medium ignored",
			     $medium->{name}));
	}
    } else {
	unless ($medium->{ignore} || $medium->{hdlist}) {
	    $medium->{hdlist} = "hdlist.$medium->{name}.cz";
	    -e "$urpm->{statedir}/$medium->{hdlist}" or $medium->{hdlist} = "hdlist.$medium->{name}.cz2";
	    -e "$urpm->{statedir}/$medium->{hdlist}" or
	      $medium->{ignore} = 1,
		$urpm->{error}(N("unable to find hdlist file for \"%s\", medium ignored", $medium->{name}));
	}
	unless ($medium->{ignore} || $medium->{list}) {
	    unless (defined $medium->{url}) {
		$medium->{list} = "list.$medium->{name}";
		unless (-e "$urpm->{statedir}/$medium->{list}") {
		    $medium->{ignore} = 1,
		      $urpm->{error}(N("unable to find list file for \"%s\", medium ignored", $medium->{name}));
		}
	    }
	}

	#- there is a little more to do at this point as url is not known, inspect directly list file for it.
	unless ($medium->{url}) {
	    my %probe;
	    if (-r "$urpm->{statedir}/$medium->{list}") {
		my $listfile = $urpm->open_safe("<", "$urpm->{statedir}/$medium->{list}");
		if ($listfile) {
		    while (<$listfile>) {
			#- /./ is end of url marker in list file (typically generated by a
			#- find . -name "*.rpm" > list
			#- for exportable list file.
			m|^(.*)/\./| and $probe{$1} = undef;
			m|^(.*)/[^/]*$| and $probe{$1} = undef;
		    }
		    close $listfile;
		}
	    }
	    foreach (sort { length($a) <=> length($b) } keys %probe) {
		if ($medium->{url}) {
		    if ($medium->{url} ne substr($_, 0, length($medium->{url}))) {
			$medium->{ignore} or $urpm->{error}(N("inconsistent list file for \"%s\", medium ignored", $medium->{name}));
			$medium->{ignore} = 1;
			last;
		    }
		} else {
		    $medium->{url} = $_;
		}
	    }
	    unless ($options{nocheck_access}) {
		unless ($medium->{url}) {
		    $medium->{ignore} or $urpm->{error}(N("unable to inspect list file for \"%s\", medium ignored", $medium->{name}));
		    $medium->{ignore} = 1;
		}
	    }
	}
    }

    #- probe removable device.
    $urpm->probe_removable_device($medium);

    #- clear URLs for trailing /es.
    $medium->{url} and $medium->{url} =~ s|(.*?)/*$|$1|;
    $medium->{clear_url} and $medium->{clear_url} =~ s|(.*?)/*$|$1|;

    $medium;
}

#- returns the removable device name if it corresponds to an iso image, '' otherwise
sub is_iso {
    my ($removable_dev) = @_;
    $removable_dev && $removable_dev =~ /\.iso$/i ? $removable_dev : '';
}

#- probe device associated with a removable device.
sub probe_removable_device {
    my ($urpm, $medium) = @_;

    #- try to find device name in url scheme
    if ($medium->{url} && $medium->{url} =~ /^removable_?([^_:]*)(?:_[^:]*)?:/) {
	$medium->{removable} ||= $1 && "/dev/$1";
    } else {
	delete $medium->{removable};
    }

    #- try to find device to open/close for removable medium.
    if (exists($medium->{removable})) {
	if (my ($dir) = $medium->{url} =~ m!^(?:(?:file|removable)[^:]*:/)?(/.*)!) {
	    my %infos;
	    my @mntpoints = urpm::sys::find_mntpoints($dir, \%infos);
	    if (@mntpoints > 1) { #- return value is suitable for an hash.
		$urpm->{log}(N("too many mount points for removable medium \"%s\"", $medium->{name}));
		$urpm->{log}(N("taking removable device as \"%s\"", join ',', map { $infos{$_}{device} } @mntpoints));
	    }
	    if (is_iso($medium->{removable})) {
		$urpm->{log}(N("Medium \"%s\" is an ISO image, will be mounted on-the-fly", $medium->{name}));
	    } elsif (@mntpoints) {
		if ($medium->{removable} && $medium->{removable} ne $infos{$mntpoints[-1]}{device}) {
		    $urpm->{log}(N("using different removable device [%s] for \"%s\"",
				   $infos{$mntpoints[-1]}{device}, $medium->{name}));
		}
		$medium->{removable} = $infos{$mntpoints[-1]}{device};
	    } else {
		$urpm->{error}(N("unable to retrieve pathname for removable medium \"%s\"", $medium->{name}));
	    }
	} else {
	    $urpm->{error}(N("unable to retrieve pathname for removable medium \"%s\"", $medium->{name}));
	}
    }
}

#- Writes the urpmi.cfg file.
sub write_config {
    my ($urpm) = @_;

    #- avoid trashing exiting configuration if it wasn't loaded
    $urpm->{media} or return;

    my $config = {
	#- global config options found in the config file, without the ones
	#- set from the command-line
	'' => $urpm->{global_config},
    };
    foreach my $medium (@{$urpm->{media}}) {
	next if $medium->{external}; 
	my $medium_name = $medium->{name};
	$config->{$medium_name}{url} = $medium->{clear_url};
	foreach (qw(hdlist with_hdlist list removable key-ids priority priority-upgrade update noreconfigure static ignore synthesis virtual)) {
	    defined $medium->{$_} and $config->{$medium_name}{$_} = $medium->{$_};
	}
    }
    urpm::cfg::dump_config($urpm->{config}, $config)
	or $urpm->{fatal}(6, N("unable to write config file [%s]", $urpm->{config}));

    #- write MD5SUM file
    my $md5sum = $urpm->open_safe('>', "$urpm->{statedir}/MD5SUM") or return 0;
    foreach my $medium (@{$urpm->{media}}) {
	$medium->{md5sum}
	    and print $md5sum "$medium->{md5sum}  " . ($medium->{synthesis} && "synthesis.") . $medium->{hdlist} . "\n";
    }
    close $md5sum;

    $urpm->{log}(N("wrote config file [%s]", $urpm->{config}));

    #- everything should be synced now.
    delete $urpm->{modified};
}

#- read urpmi.cfg file as well as synthesis file needed.
sub configure {
    my ($urpm, %options) = @_;

    $urpm->clean;

    $options{parallel} && $options{usedistrib} and $urpm->{fatal}(1, N("Can't use parallel mode with use-distrib mode"));

    if ($options{parallel}) {
	my ($parallel_options, $parallel_handler);
	#- read parallel configuration
	local $_;
	my $parallel = $urpm->open_safe("<", "/etc/urpmi/parallel.cfg");
	if ($parallel) {
	    while (<$parallel>) {
		chomp; s/#.*$//; s/^\s*//; s/\s*$//;
		/\s*([^:]*):(.*)/ or $urpm->{error}(N("unable to parse \"%s\" in file [%s]", $_, "/etc/urpmi/parallel.cfg")), next;
		$1 eq $options{parallel} and $parallel_options = ($parallel_options && "\n") . $2;
	    }
	    close $parallel;
	}
	#- if a configuration option has been found, use it; else fatal error.
	if ($parallel_options) {
	    foreach my $dir (grep { -d $_ } map { "$_/urpm" } @INC) {
		my $dh = $urpm->opendir_safe($dir);
		if ($dh) {
		    while (defined ($_ = readdir $dh)) { #- load parallel modules
			/parallel.*\.pm$/ && -f "$dir/$_" or next;
			$urpm->{log}->(N("examining parallel handler in file [%s]", "$dir/$_"));
			eval { require "$dir/$_"; $parallel_handler = $urpm->handle_parallel_options($parallel_options) };
			$parallel_handler and last;
		    }
		    closedir $dh;
		}
		$parallel_handler and last;
	    }
	}
	if ($parallel_handler) {
	    if ($parallel_handler->{nodes}) {
		$urpm->{log}->(N("found parallel handler for nodes: %s", join(', ', keys %{$parallel_handler->{nodes}})));
	    }
	    if (!$options{media} && $parallel_handler->{media}) {
		$options{media} = $parallel_handler->{media};
		$urpm->{log}->(N("using associated media for parallel mode: %s", $options{media}));
	    }
	    $urpm->{parallel_handler} = $parallel_handler;
	} else {
	    $urpm->{fatal}(1, N("unable to use parallel option \"%s\"", $options{parallel}));
	}
    } else {
	#- parallel is exclusive against root options.
	$urpm->{root} = $options{root};
    }

    $urpm->{root} && ! -c "$urpm->{root}/dev/null"
	and $urpm->{error}(N("there doesn't seem to be devices in the chroot in \"%s\"", $urpm->{root}));

    if ($options{synthesis}) {
	if ($options{synthesis} ne 'none') {
	    #- synthesis take precedence over media, update options.
	    $options{media} || $options{excludemedia} || $options{sortmedia} || $options{update} || $options{parallel} and
	      $urpm->{fatal}(1, N("--synthesis cannot be used with --media, --excludemedia, --sortmedia, --update or --parallel"));
	    $urpm->parse_synthesis($options{synthesis});
	    #- synthesis disables the split of transaction (too risky and not useful).
	    $urpm->{options}{'split-length'} = 0;
	}
    } else {
        if ($options{usedistrib}) {
            $urpm->{media} = [];
            $urpm->add_distrib_media("Virtual", $options{usedistrib}, %options, 'virtual' => 1);
        } else {
	    $urpm->read_config(%options);
        }
	if ($options{media}) {
	    delete $_->{modified} foreach @{$urpm->{media} || []};
	    $urpm->select_media(split ',', $options{media});
	    foreach (grep { !$_->{modified} } @{$urpm->{media} || []}) {
		#- this is only a local ignore that will not be saved.
		$_->{ignore} = 1;
	    }
	}
	if ($options{searchmedia}) {
	   $urpm->select_media($options{searchmedia}); # Ensure this media has been selected
	   foreach (grep { !$_->{ignore} } @{$urpm->{media} || []}) {
		$_->{name} eq $options{searchmedia} and do {
			$_->{searchmedia} = 1;
			last;
		};
	   }
	}
	if ($options{excludemedia}) {
	    delete $_->{modified} foreach @{$urpm->{media} || []};
	    $urpm->select_media(split ',', $options{excludemedia});
	    foreach (grep { $_->{modified} } @{$urpm->{media} || []}) {
		#- this is only a local ignore that will not be saved.
		$_->{ignore} = 1;
	    }
	}
	if ($options{sortmedia}) {
	    delete $_->{modified} foreach @{$urpm->{media} || []};
	    my @oldmedia = @{$urpm->{media} || []};
	    my @newmedia;
	    foreach (split /,/, $options{sortmedia}) {
		$urpm->select_media($_);
		push @newmedia, grep { $_->{modified} } @oldmedia;
		@oldmedia = grep { !$_->{modified} } @oldmedia;
	    }
	    #- anything not selected should be added here, as it's after the selected ones.
	    $urpm->{media} = [ @newmedia, @oldmedia ];
	    #- clean remaining modified flags.
	    delete $_->{modified} foreach @{$urpm->{media} || []};
	}
	unless ($options{nodepslist}) {
	    my $second_pass;
	    do {
		foreach (grep { !$_->{ignore} && (!$options{update} || $_->{update}) } @{$urpm->{media} || []}) {
		    our $currentmedia = $_; #- hack for urpmf
		    delete @$_{qw(start end)};
		    if ($_->{virtual}) {
			my $path = $_->{url} =~ m!^(?:file:/*)?(/[^/].*[^/])/*\Z! && $1;
			if ($path) {
			    if ($_->{synthesis}) {
				$urpm->{log}(N("examining synthesis file [%s]", "$path/$_->{with_hdlist}"));
				($_->{start}, $_->{end}) = $urpm->parse_synthesis(
				    "$path/$_->{with_hdlist}", callback => $options{callback});
			    } else {
				$urpm->{log}(N("examining hdlist file [%s]", "$path/$_->{with_hdlist}"));
				#- we'll need a second pass
				defined $second_pass or $second_pass = 1;
				($_->{start}, $_->{end}) = $urpm->parse_hdlist(
				    "$path/$_->{with_hdlist}",
				    packing => 1,
				    callback => $options{call_back_only_once} && $second_pass ? undef : $options{callback},
				);
			    }
			} else {
			    $urpm->{error}(N("virtual medium \"%s\" is not local, medium ignored", $_->{name}));
			    $_->{ignore} = 1;
			}
		    } else {
			if ($options{hdlist} && -e "$urpm->{statedir}/$_->{hdlist}" && -s _ > 32) {
			    $urpm->{log}(N("examining hdlist file [%s]", "$urpm->{statedir}/$_->{hdlist}"));
			    ($_->{start}, $_->{end}) = $urpm->parse_hdlist(
				"$urpm->{statedir}/$_->{hdlist}",
				packing => 1,
				callback => $options{callback},
			    );
			} else {
			    $urpm->{log}(N("examining synthesis file [%s]", "$urpm->{statedir}/synthesis.$_->{hdlist}"));
			    ($_->{start}, $_->{end}) = $urpm->parse_synthesis(
				"$urpm->{statedir}/synthesis.$_->{hdlist}",
				callback => $options{callback},
			    );
			    unless (defined $_->{start} && defined $_->{end}) {
				$urpm->{log}(N("examining hdlist file [%s]", "$urpm->{statedir}/$_->{hdlist}"));
				($_->{start}, $_->{end}) = $urpm->parse_hdlist("$urpm->{statedir}/$_->{hdlist}",
				    packing => 1,
				    callback => $options{callback},
				);
			    }
			}
		    }
		    unless ($_->{ignore}) {
			if (defined $_->{start} && defined $_->{end}) {
			    if ($_->{searchmedia}) {
			        ($urpm->{searchmedia}{start}, $urpm->{searchmedia}{end}) = ($_->{start}, $_->{end});
				$urpm->{log}(N("Search start: %s end: %s",
					$urpm->{searchmedia}{start}, $urpm->{searchmedia}{end}));
				delete $_->{searchmedia};
			    }
			} else {
			    $urpm->{error}(N("problem reading hdlist or synthesis file of medium \"%s\"", $_->{name}));
			    $_->{ignore} = 1;
			}
		    }
		}
	    } while $second_pass && do {
		require URPM::Build;
		$urpm->{log}(N("performing second pass to compute dependencies\n"));
		$urpm->unresolved_provides_clean;
		$second_pass--;
	    };
	}
    }
    #- determine package to withdraw (from skip.list file) only if something should be withdrawn.
    unless ($options{noskipping}) {
	my %uniq;
	$urpm->compute_flags(
	    get_packages_list($urpm->{skiplist}, $options{skip}),
	    skip => 1,
	    callback => sub {
		my ($urpm, $pkg) = @_;
		$pkg->is_arch_compat && ! exists $uniq{$pkg->fullname} or return;
		$uniq{$pkg->fullname} = undef;
		$urpm->{log}(N("skipping package %s", scalar($pkg->fullname)));
	    },
	);
    }
    unless ($options{noinstalling}) {
	my %uniq;
	$urpm->compute_flags(
	    get_packages_list($urpm->{instlist}),
	    disable_obsolete => 1,
	    callback => sub {
		my ($urpm, $pkg) = @_;
		$pkg->is_arch_compat && ! exists $uniq{$pkg->fullname} or return;
		$uniq{$pkg->fullname} = undef;
		$urpm->{log}(N("would install instead of upgrade package %s", scalar($pkg->fullname)));
	    },
	);
    }
    if ($options{bug}) {
	#- and a dump of rpmdb itself as synthesis file.
	my $db = URPM::DB::open($options{root});
	my $sig_handler = sub { undef $db; exit 3 };
	local $SIG{INT} = $sig_handler;
	local $SIG{QUIT} = $sig_handler;

	$db or $urpm->{fatal}(9, N("unable to open rpmdb"));
	open my $rpmdb, "| " . ($ENV{LD_LOADER} || '') . " gzip -9 >'$options{bug}/rpmdb.cz'"
	    or $urpm->syserror("Can't fork", "gzip");
	$db->traverse(sub {
			  my ($p) = @_;
			  #- this is not right but may be enough.
			  my $files = join '@', grep { exists($urpm->{provides}{$_}) } $p->files;
			  $p->pack_header;
			  $p->build_info(fileno $rpmdb, $files);
		      });
	close $rpmdb;
    }
}

#- add a new medium, sync the config file accordingly.
#- returns the new medium's name. (might be different from the requested
#- name if index_name was specified)
sub add_medium {
    my ($urpm, $name, $url, $with_hdlist, %options) = @_;

    #- make sure configuration has been read.
    $urpm->{media} or $urpm->read_config;

    #- if a medium with that name has already been found, we have to exit now
    my ($medium);
    if (defined $options{index_name}) {
	my $i = $options{index_name};
	do {
	    ++$i;
	    undef $medium;
	    foreach (@{$urpm->{media}}) {
		$_->{name} eq $name . $i and $medium = $_;
	    }
	} while $medium;
	$name .= $i;
    } else {
	foreach (@{$urpm->{media}}) {
	    $_->{name} eq $name and $medium = $_;
	}
    }
    $medium and $urpm->{fatal}(5, N("medium \"%s\" already exists", $medium->{name}));

    $url =~ s,/*$,,; #- clear URLs for trailing /es.

    #- creating the medium info.
    $medium = { name => $name, url => $url, update => $options{update}, modified => 1 };
    if ($options{virtual}) {
	$url =~ m!^(?:file:)?/! or $urpm->{fatal}(1, N("virtual medium needs to be local"));
	$medium->{virtual} = 1;
    } else {
	$medium->{hdlist} = "hdlist.$name.cz";
	$medium->{list} = "list.$name";
	#- check if the medium is using a local or a removable medium.
	$url =~ m!^(?:(removable[^:]*|file):/)?(/.*)! and $urpm->probe_removable_device($medium);
    }

    #- local media have priority, other are added at the end.
    if ($url =~ m!^(?:file:)?/!) {
	$medium->{priority} = 0.5;
    } else {
	$medium->{priority} = 1 + @{$urpm->{media}};
    }

    #- check whether a password is visible, if not, set clear_url.
    my $has_password = $url =~ m|([^:]*://[^/:\@]*:)[^/:\@]*(\@.*)|;
    $medium->{clear_url} = $url unless $has_password;

    $with_hdlist and $medium->{with_hdlist} = $with_hdlist;

    #- create an entry in media list.
    push @{$urpm->{media}}, $medium;

    #- keep in mind the database has been modified and base files need to be updated.
    #- this will be done automatically by transfering modified flag from medium to global.
    $urpm->{log}(N("added medium %s", $name));

    #- we need to reload the config, since some string substitutions may have occured
    unless ($options{no_reload_config}) {
	$urpm->write_config;
	delete $urpm->{media};
	$urpm->read_config(nocheck_access => 1);
	$_->{name} eq $name and $_->{modified} = 1 foreach @{$urpm->{media}};
	$urpm->{modified} = 1;
    }
    if ($has_password) {
	foreach (grep { $_->{name} eq $name } @{$urpm->{media}}) {
	    $_->{url} = $url;
	}
    }

    $name;
}

#- add distribution media, according to url given.
#- returns the list of names of added media.
#- options :
#- - limit_rate, compress : for downloading files
#- - initial_number : when adding several numbered media, start with this number
#- - probe_with : if eq 'synthesis', use synthesis instead of hdlists
#- other options are passed to add_medium()
sub add_distrib_media {
    my ($urpm, $name, $url, %options) = @_;
    my ($hdlists_file);
    my $distrib_root = "media/media_info";

    #- make sure configuration has been read.
    # (Olivier Thauvin): Is this a workaround ?
    $urpm->{media} or $urpm->read_config;

    #- try to copy/retrieve the hdlists file.
    if (my ($dir) = $url =~ m!^(?:removable[^:]*:/|file:/)?(/.*)!) {
	#- be compatible with pre-10.1 layout
	-d "$dir/$distrib_root" or $distrib_root = "Mandrake/base";

	$hdlists_file = reduce_pathname("$dir/$distrib_root/hdlists");

	$urpm->try_mounting($hdlists_file) or $urpm->{error}(N("unable to access first installation medium")), return ();

	if (-e $hdlists_file) {
	    unlink "$urpm->{cachedir}/partial/hdlists";
	    $urpm->{log}(N("copying hdlists file..."));
	    urpm::util::copy($hdlists_file, "$urpm->{cachedir}/partial/hdlists")
		? $urpm->{log}(N("...copying done"))
		: do { $urpm->{error}(N("...copying failed")); return () };
	    chown 0, 0, "$urpm->{cachedir}/partial/hdlists";
	} else {
	    $urpm->{error}(N("unable to access first installation medium (no hdlists file found)"));
	    return ();
	}
    } else {
	#- try to get the description of the hdlists if it has been found.
	unlink "$urpm->{cachedir}/partial/hdlists";
	eval {
	    $urpm->{log}(N("retrieving hdlists file..."));
	    $urpm->{sync}(
		{
		    dir => "$urpm->{cachedir}/partial",
		    quiet => 1,
		    limit_rate => $options{limit_rate},
		    compress => $options{compress},
		    retry => $urpm->{options}{retry},
		    proxy => get_proxy(),
		},
		reduce_pathname("$url/$distrib_root/hdlists"),
	    );
	    $urpm->{log}(N("...retrieving done"));
	};
	$@ and $urpm->{error}(N("...retrieving failed: %s", $@));
	if (-e "$urpm->{cachedir}/partial/hdlists") {
	    $hdlists_file = "$urpm->{cachedir}/partial/hdlists";
	} else {
	    $urpm->{error}(N("unable to access first installation medium (no hdlists file found)"));
	    return ();
	}
    }

    #- cosmetic update of name if it contains spaces.
    $name =~ /\s/ and $name .= ' ';

    my @newnames;
    #- at this point, we have found an hdlists file, so parse it
    #- and create all necessary media according to it.
    my $hdlistsfh;
    if ($hdlistsfh = $urpm->open_safe("<", $hdlists_file)) {
	my $medium = $options{initial_number} || 1;
	foreach (<$hdlistsfh>) {
	    chomp;
	    s/\s*#.*$//;
	    /^\s*$/ and next;
	    /^(?:suppl|askmedia)/ and next;
	    /^\s*(noauto:)?(hdlist\S*\.cz2?)\s+(\S+)\s*([^(]*)(\(.+\))?$/
		or $urpm->{error}(N("invalid hdlist description \"%s\" in hdlists file", $_));
	    my ($noauto, $hdlist, $rpmsdir, $descr) = ($1, $2, $3, $4);
	    next if $noauto;
	    $descr =~ s/\s+$//;

	    push @newnames, $urpm->add_medium(
		$name ? "$descr ($name$medium)" : $descr,
		"$url/$rpmsdir",
		offset_pathname($url, $rpmsdir) . "/$distrib_root/" . ($options{probe_with} eq 'synthesis' ? 'synthesis.' : '') . $hdlist,
		index_name => $name ? undef : 0,
		no_reload_config => 1, #- no need to reload config each time, since we don't update the media
		%options,
	    );

	    ++$medium;
	}
	close $hdlistsfh;
	return @newnames;
    } else {
	$urpm->{error}(N("unable to access first installation medium (no hdlists file found)"));
	return ();
    }
}

sub select_media {
    my $urpm = shift;
    my $options = {};
    if (ref $_[0]) { $options = shift }
    my %media; @media{@_} = ();

    foreach (@{$urpm->{media}}) {
	if (exists($media{$_->{name}})) {
	    $media{$_->{name}} = 1; #- keep in mind this one has been selected.
	    #- select medium by setting the modified flag, do not check ignore.
	    $_->{modified} = 1;
	}
    }

    #- check if some arguments don't correspond to the medium name.
    #- in such case, try to find the unique medium (or list candidate
    #- media found).
    foreach (keys %media) {
	unless ($media{$_}) {
	    my $q = quotemeta;
	    my (@found, @foundi);
	    my $regex  = $options->{strict_match} ? qr/\b$q\b/  : qr/$q/;
	    my $regexi = $options->{strict_match} ? qr/\b$q\b/i : qr/$q/i;
	    foreach my $medium (@{$urpm->{media}}) {
		$medium->{name} =~ $regex  and push @found, $medium;
		$medium->{name} =~ $regexi and push @foundi, $medium;
	    }
	    if (@found == 1) {
		$found[0]{modified} = 1;
	    } elsif (@foundi == 1) {
		$foundi[0]{modified} = 1;
	    } elsif (@found == 0 && @foundi == 0) {
		$urpm->{error}(N("trying to select nonexistent medium \"%s\"", $_));
	    } else { #- several elements in found and/or foundi lists.
		$urpm->{log}(N("selecting multiple media: %s", join(", ", map { N("\"%s\"", $_->{name}) } (@found ? @found : @foundi))));
		#- changed behaviour to select all occurences by default.
		foreach (@found ? @found : @foundi) {
		    $_->{modified} = 1;
		}
	    }
	}
    }
}

sub remove_selected_media {
    my ($urpm) = @_;
    my @result;

    foreach (@{$urpm->{media}}) {
	if ($_->{modified}) {
	    $urpm->{log}(N("removing medium \"%s\"", $_->{name}));

	    #- mark to re-write configuration.
	    $urpm->{modified} = 1;

	    #- remove files associated with this medium.
	    foreach ($_->{hdlist}, $_->{list}, "synthesis.$_->{hdlist}", "descriptions.$_->{name}", "names.$_->{name}",
		     "$_->{name}.cache") {
		$_ and unlink "$urpm->{statedir}/$_";
	    }

	    #- remove proxy settings for this media
	    urpm::download::remove_proxy_media($_->{name});
	} else {
	    push @result, $_; #- not removed so keep it
	}
    }

    #- restore newer media list.
    $urpm->{media} = \@result;
}

#- return list of synthesis or hdlist reference to probe.
sub _probe_with_try_list {
    my ($suffix, $probe_with) = @_;
    my @probe = (
	"media_info/synthesis.hdlist.cz",
	"../media_info/synthesis.hdlist_$suffix.cz",
	"synthesis.hdlist.cz",
    );
    my @probe_hdlist = (
	"media_info/hdlist.cz",
	"../media_info/hdlist_$suffix.cz",
	"hdlist.cz",
    );
    if ($probe_with =~ /synthesis/) {
	push @probe, @probe_hdlist;
    } else {
	unshift @probe, @probe_hdlist;
    }
    @probe;
}

#- read a reconfiguration file for urpmi, and reconfigure media accordingly
#- $rfile is the reconfiguration file (local), $name is the media name
sub reconfig_urpmi {
    my ($urpm, $rfile, $name) = @_;
    my @replacements;
    my @reconfigurable = qw(url with_hdlist clear_url);
    my $reconfigured = 0;
    my $fh = $urpm->open_safe("<", $rfile) or return undef;
    $urpm->{log}(N("reconfiguring urpmi for media \"%s\"", $name));
    #- the first line of reconfig.urpmi must be magic, to be sure it's not an error file
    my $magic = <$fh>;
    $magic =~ /^# this is an urpmi reconfiguration file/ or return undef;
    while (<$fh>) {
	chomp;
	s/^\s*//; s/#.*$//; s/\s*$//;
	$_ or next;
	my ($p, $r, $f) = split /\s+/, $_, 3;
	$f ||= 1;
	push @replacements, [ quotemeta $p, $r, $f ];
    }
  MEDIA:
    foreach my $medium (grep { $_->{name} eq $name } @{$urpm->{media}}) {
        my %orig = map { $_ => $medium->{$_} } @reconfigurable;
      URLS:
	foreach my $k (@reconfigurable) {
	    foreach my $r (@replacements) {
		if ($medium->{$k} =~ s/$r->[0]/$r->[1]/) {
		    $reconfigured = 1;
		    #- Flags stolen from mod_rewrite: L(ast), N(ext)
		    last if $r->[2] =~ /L/;
		    redo URLS if $r->[2] =~ /N/;
		}
	    }
	    #- check that the new url exists before committing changes (local mirrors)
	    if ($medium->{$k} =~ m!^(?:file:/*)?(/[^/].*[^/])/*\Z! && !-e $1) {
		$medium->{$k} = $orig{$k} foreach @reconfigurable;
		$reconfigured = 0;
		$urpm->{log}(N("...reconfiguration failed"));
		last MEDIA;
	    }
	}
    }
    close $fh;
    if ($reconfigured) {
	$urpm->{log}(N("reconfiguration done"));
	$urpm->write_config;
    }
    $reconfigured;
}

sub _guess_hdlist_suffix {
    my ($dir) = @_;
    my ($suffix) = $dir =~ m!\bmedia/(\w+)/*\Z!;
    $suffix;
}

sub _guess_pubkey_name {
    my ($medium) = @_;
    return $medium->{with_hdlist} =~ /hdlist(.*?)(?:\.src)?\.cz2?$/ ? "pubkey$1" : 'pubkey';
}

#- Update the urpmi database w.r.t. the current configuration.
#- Takes care of modifications, and tries some tricks to bypass
#- the recomputation of base files.
#- Recognized options :
#-   all         : all medias are being rebuilt
#-   callback    : UI callback
#-   forcekey    : force retrieval of pubkey
#-   force       : try to force rebuilding base files (1) or hdlist from rpm files (2)
#-   noclean     : keep old files in the header cache directory
#-   nolock      : don't lock the urpmi database
#-   nomd5sum    : don't verify MD5SUM of retrieved files
#-   nopubkey    : don't use rpm pubkeys
#-   norebuild   : don't try to rebuild hdlists from rpm headers
#-   probe_with  : probe synthesis or hdlist (or none)
#-   ratio       : use this compression ratio (with gzip, default is 4)
sub update_media {
    my ($urpm, %options) = @_;
    my $clean_cache = !$options{noclean};
    my $second_pass;

    $urpm->{media} or return; # verify that configuration has been read

    my $nopubkey = $options{nopubkey} || $urpm->{options}{nopubkey};
    #- get gpg-pubkey signature.
    if (!$nopubkey) {
	$urpm->exlock_rpm_db;
	$urpm->{keys} or $urpm->parse_pubkeys(root => $urpm->{root});
    }
    #- lock database if allowed.
    $options{nolock} or $urpm->exlock_urpmi_db;

    #- examine each medium to see if one of them needs to be updated.
    #- if this is the case and if not forced, try to use a pre-calculated
    #- hdlist file, else build it from rpm files.
    $urpm->clean;

    my %media_redone;
  MEDIA:
    foreach my $medium (@{$urpm->{media}}) {
	$medium->{ignore} and next;

	$options{forcekey} and delete $medium->{'key-ids'};
	
	#- we should create the associated synthesis file if it does not already exist...
	-e "$urpm->{statedir}/synthesis.$medium->{hdlist}" && -s _ > 32
	    or $medium->{modified_synthesis} = 1;

	#- if we're rebuilding all media, mark them as modified (except removable ones)
	$medium->{modified} ||= $options{all} && $medium->{url} !~ m!^removable://!;
	#- don't ever update static media
	$medium->{static} and $medium->{modified} = 0;

	unless ($medium->{modified}) {
	    #- the medium is not modified, but to compute dependencies,
	    #- we still need to read it and all synthesis will be written if
	    #- an unresolved provides is found.
	    #- to speed up the process, we only read the synthesis at the beginning.
	    delete @$medium{qw(start end)};
	    if ($medium->{virtual}) {
		my ($path) = $medium->{url} =~ m!^(?:file:)?/*(/[^/].*[^/])/*\Z!;
		if ($path) {
		    my $with_hdlist_file = "$path/$medium->{with_hdlist}";
		    if ($medium->{synthesis}) {
			$urpm->{log}(N("examining synthesis file [%s]", $with_hdlist_file));
			($medium->{start}, $medium->{end}) = $urpm->parse_synthesis($with_hdlist_file);
		    } else {
			$urpm->{log}(N("examining hdlist file [%s]", $with_hdlist_file));
			($medium->{start}, $medium->{end}) = $urpm->parse_hdlist($with_hdlist_file, packing => 1);
		    }
		} else {
		    $urpm->{error}(N("virtual medium \"%s\" is not local, medium ignored", $medium->{name}));
		    $_->{ignore} = 1;
		}
	    } else {
		$urpm->{log}(N("examining synthesis file [%s]", "$urpm->{statedir}/synthesis.$medium->{hdlist}"));
		($medium->{start}, $medium->{end}) = $urpm->parse_synthesis("$urpm->{statedir}/synthesis.$medium->{hdlist}");
		unless (defined $medium->{start} && defined $medium->{end}) {
		    $urpm->{log}(N("examining hdlist file [%s]", "$urpm->{statedir}/$medium->{hdlist}"));
		    ($medium->{start}, $medium->{end}) = $urpm->parse_hdlist("$urpm->{statedir}/$medium->{hdlist}", packing => 1);
		}
	    }
	    unless ($medium->{ignore}) {
		unless (defined $medium->{start} && defined $medium->{end}) {
		    #- this is almost a fatal error, ignore it by default?
		    $urpm->{error}(N("problem reading hdlist or synthesis file of medium \"%s\"", $medium->{name}));
		    $medium->{ignore} = 1;
		}
	    }
	    next;
	}

	#- list of rpm files for this medium, only available for local medium where
	#- the source hdlist is not used (use force).
	my ($prefix, $dir, $error, $retrieved_md5sum, @files);

	#- always delete a remaining list file or pubkey file in cache.
	foreach (qw(list pubkey)) {
	    unlink "$urpm->{cachedir}/partial/$_";
	}

	#- check if the medium is using a local or a removable medium.
	if (($prefix, $dir) = $medium->{url} =~ m!^(?:(removable[^:]*|file):/)?(/.*)!) {
	    $prefix ||= 'file';
	    #- check for a reconfig.urpmi file (if not already reconfigured)
	    if (!$media_redone{$medium->{name}} && !$medium->{noreconfigure}) {
		my $reconfig_urpmi = reduce_pathname("$dir/reconfig.urpmi");
		if (-s $reconfig_urpmi && $urpm->reconfig_urpmi($reconfig_urpmi, $medium->{name})) {
		    $media_redone{$medium->{name}} = 1;
		    redo MEDIA;
		}
	    }

	    #- try to figure a possible hdlist_path (or parent directory of searched directory).
	    #- this is used to probe for a possible hdlist file.
	    my $with_hdlist_dir = reduce_pathname($dir . ($medium->{with_hdlist} ? "/$medium->{with_hdlist}" : "/.."));

	    #- the directory given does not exist and may be accessible
	    #- by mounting some other directory. Try to figure it out and mount
	    #- everything that might be necessary.
	    -d $dir or $urpm->try_mounting(
		$options{force} < 2 && ($options{probe_with} || $medium->{with_hdlist})
		    ? $with_hdlist_dir : $dir,
		#- in case of an iso image, pass its name
		is_iso($medium->{removable}),
	    ) or $urpm->{error}(N("unable to access medium \"%s\",
this could happen if you mounted manually the directory when creating the medium.", $medium->{name})), next;

	    #- try to probe for possible with_hdlist parameter, unless
	    #- it is already defined (and valid).
	    if ($options{probe_with} && (!$medium->{with_hdlist} || ! -e "$dir/$medium->{with_hdlist}")) {
		foreach (_probe_with_try_list(_guess_hdlist_suffix($dir), $options{probe_with})) {
		    if (-e "$dir/$_" && -s _ > 32) {
			$medium->{with_hdlist} = $_;
			last;
		    }
		}
		#- redo...
		$with_hdlist_dir = reduce_pathname($dir . ($medium->{with_hdlist} ? "/$medium->{with_hdlist}" : "/.."));
	    }

	    if ($medium->{virtual}) {
		#- syncing a virtual medium is very simple, just try to read the file in order to
		#- determine its type, once a with_hdlist has been found (but is mandatory).
		if ($medium->{with_hdlist} && -e $with_hdlist_dir) {
		    delete @$medium{qw(start end)};
		    if ($medium->{synthesis}) {
			$urpm->{log}(N("examining synthesis file [%s]", $with_hdlist_dir));
			($medium->{start}, $medium->{end}) = $urpm->parse_synthesis($with_hdlist_dir);
			delete $medium->{modified};
			$medium->{synthesis} = 1;
			$urpm->{modified} = 1;
			unless (defined $medium->{start} && defined $medium->{end}) {
			    $urpm->{log}(N("examining hdlist file [%s]", $with_hdlist_dir));
			    ($medium->{start}, $medium->{end}) = $urpm->parse_hdlist($with_hdlist_dir, packing => 1);
			    delete @$medium{qw(modified synthesis)};
			    $urpm->{modified} = 1;
			}
		    } else {
			$urpm->{log}(N("examining hdlist file [%s]", $with_hdlist_dir));
			($medium->{start}, $medium->{end}) = $urpm->parse_hdlist($with_hdlist_dir, packing => 1);
			delete @$medium{qw(modified synthesis)};
			$urpm->{modified} = 1;
			unless (defined $medium->{start} && defined $medium->{end}) {
			    $urpm->{log}(N("examining synthesis file [%s]", $with_hdlist_dir));
			    ($medium->{start}, $medium->{end}) = $urpm->parse_synthesis($with_hdlist_dir);
			    delete $medium->{modified};
			    $medium->{synthesis} = 1;
			    $urpm->{modified} = 1;
			}
		    }
		    unless (defined $medium->{start} && defined $medium->{end}) {
			$urpm->{error}(N("problem reading hdlist or synthesis file of medium \"%s\"", $medium->{name}));
			$medium->{ignore} = 1;
		    }
		} else {
		    $urpm->{error}(N("virtual medium \"%s\" should have valid source hdlist or synthesis, medium ignored",
				     $medium->{name}));
		    $medium->{ignore} = 1;
		}
	    }
	    #- try to get the description if it has been found.
	    unlink "$urpm->{statedir}/descriptions.$medium->{name}";
	    my $description_file = "$dir/media_info/descriptions"; #- new default location
	    -e $description_file or $description_file = "$dir/../descriptions";
	    if (-e $description_file) {
		$urpm->{log}(N("copying description file of \"%s\"...", $medium->{name}));
		urpm::util::copy($description_file, "$urpm->{statedir}/descriptions.$medium->{name}")
		    ? $urpm->{log}(N("...copying done"))
		    : do { $urpm->{error}(N("...copying failed")); $medium->{ignore} = 1 };
		chown 0, 0, "$urpm->{statedir}/descriptions.$medium->{name}";
	    }

	    #- examine if a distant MD5SUM file is available.
	    #- this will only be done if $with_hdlist is not empty in order to use
	    #- an existing hdlist or synthesis file, and to check if download was good.
	    #- if no MD5SUM is available, do it as before...
	    #- we can assume at this point a basename is existing, but it needs
	    #- to be checked for being valid, nothing can be deduced if no MD5SUM
	    #- file is present.
	    my $basename = basename($with_hdlist_dir);

	    unless ($medium->{virtual}) {
		if ($medium->{with_hdlist}) {
		    if (!$options{nomd5sum} && -s reduce_pathname("$with_hdlist_dir/../MD5SUM") > 32) {
			if ($options{force}) {
			    #- force downloading the file again, else why a force option has been defined ?
			    delete $medium->{md5sum};
			} else {
			    unless ($medium->{md5sum}) {
				$urpm->{log}(N("computing md5sum of existing source hdlist (or synthesis)"));
				if ($medium->{synthesis}) {
				    -e "$urpm->{statedir}/synthesis.$medium->{hdlist}" and
				      $medium->{md5sum} = md5sum("$urpm->{statedir}/synthesis.$medium->{hdlist}");
				} else {
				    -e "$urpm->{statedir}/$medium->{hdlist}" and
				      $medium->{md5sum} = md5sum("$urpm->{statedir}/$medium->{hdlist}");
				}
			    }
			}
			if ($medium->{md5sum}) {
			    parse_md5sum($urpm, reduce_pathname("$with_hdlist_dir/../MD5SUM"), $basename);
			    #- If an existing hdlist or synthesis file has the same md5sum, we assume
			    #- the files are the same.
			    #- If the local md5sum is the same as the distant md5sum, this means
			    #- that there is no need to download the hdlist or synthesis file again.
			    foreach (@{$urpm->{media}}) {
				if ($_->{md5sum} && $_->{md5sum} eq $retrieved_md5sum) {
				    unlink "$urpm->{cachedir}/partial/$basename";
				    #- the medium is now considered not modified.
				    $medium->{modified} = 0;
				    #- XXX we could link the new hdlist to the old one.
				    #- (However links need to be managed. see bug #12391.)