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Current File : //proc/self/root/usr/share/perl5/Debconf/FrontEnd/Passthrough.pm

#!/usr/bin/perl -w
# This file was preprocessed, do not edit!


package Debconf::FrontEnd::Passthrough;
use strict;
use Carp;
use IO::Socket;
use IO::Handle;
use IO::Select;
use Debconf::FrontEnd;
use Debconf::Element;
use Debconf::Element::Select;
use Debconf::Element::Multiselect;
use Debconf::Log qw(:all);
use Debconf::Encoding;
use base qw(Debconf::FrontEnd);


sub init {
	my $this=shift;

	if (not defined $this->{readfh} or not defined $this->{writefh}) {
		if (not defined $this->init_fh_from_env()) {
			die "Neither DEBCONF_PIPE nor DEBCONF_READFD and DEBCONF_WRITEFD were set\n";
		}
	}

	binmode $this->{readfh}, ":utf8";
	binmode $this->{writefh}, ":utf8";

	$this->{readfh}->autoflush(1);
	$this->{writefh}->autoflush(1);

	$this->elements([]);
	$this->interactive(1);
	$this->need_tty(0);
}


sub init_fh_from_env {
	my $this = shift;
	my ($socket_path, $readfd, $writefd);

	if (defined $ENV{DEBCONF_PIPE}) {
		my $socket_path = $ENV{DEBCONF_PIPE};
		$this->{readfh} = $this->{writefh} = IO::Socket::UNIX->new(
			Type => SOCK_STREAM,
			Peer => $socket_path
		) || croak "Cannot connect to $socket_path: $!";
		return "socket";
	} elsif (defined $ENV{DEBCONF_READFD} and defined $ENV{DEBCONF_WRITEFD}) {
		$readfd = $ENV{DEBCONF_READFD};
		$writefd = $ENV{DEBCONF_WRITEFD};
		$this->{readfh} = IO::Handle->new_from_fd(int($readfd), "r")
			or croak "Failed to open fd $readfd: $!";
		$this->{writefh} = IO::Handle->new_from_fd(int($writefd), "w")
			or croak "Failed to open fd $writefd: $!";
		return "fifo";
	}
	return undef;
}


sub talk_with_timeout {
	my $this=shift;
	my $timeout=shift;
	my $command=join(' ', map { Debconf::Encoding::to_Unicode($_) } @_);
	my $reply;
	
	my $readfh = $this->{readfh} || croak "Broken pipe";
	my $writefh = $this->{writefh} || croak "Broken pipe";
	
	debug developer => "----> (passthrough) $command";
	print $writefh $command."\n";
	$writefh->flush;

	if (defined $timeout) {
		my $select = IO::Select->new($readfh);
		return undef if !$select->can_read($timeout);
	}
	return undef if ($readfh->eof());

	$reply = <$readfh>;
	chomp($reply);
	debug developer => "<---- (passthrough) $reply";
	my ($tag, $val) = split(' ', $reply, 2);
	$val = '' unless defined $val;
	$val = Debconf::Encoding::convert("UTF-8", $val);

	return ($tag, $val) if wantarray;
	return $tag;
}


sub talk {
	my $this=shift;
	return $this->talk_with_timeout(undef, @_);
}


sub makeelement
{
	my $this=shift;
	my $question=shift;

	my $type=$question->type;
	if ($type eq "select" || $type eq "multiselect") {
		$type=ucfirst($type);
		return "Debconf::Element::$type"->new(question => $question);
	} else {
		return Debconf::Element->new(question => $question);
	}
}


sub capb_backup
{
	my $this=shift;
	my $val = shift;

	$this->{capb_backup} = $val;
	$this->talk('CAPB', 'backup') if $val;
}


sub capb
{
	my $this=shift;
	my $ret;
	return $this->{capb} if exists $this->{capb};

	($ret, $this->{capb}) = $this->talk('CAPB');
	return $this->{capb} if $ret eq '0';
}


sub title
{
	my $this = shift;
	return $this->{title} unless @_;
	my $title = shift;

	$this->{title} = $title;
	$this->talk('TITLE', $title);
}


sub settitle
{
	my $this = shift;
	my $question = shift;

	$this->{title} = $question->description;

	my $tag = $question->template->template;
	my $type = $question->template->type;
	my $desc = $question->description;
	my $extdesc = $question->extended_description;

	$this->talk('DATA', $tag, 'type', $type);

	if ($desc) {
		$desc =~ s/\n/\\n/g;
		$this->talk('DATA', $tag, 'description', $desc);
	}

	if ($extdesc) {
		$extdesc =~ s/\n/\\n/g;
		$this->talk('DATA', $tag, 'extended_description', $extdesc);
	}

	$this->talk('SETTITLE', $tag);
}


sub go {
	my $this = shift;

	my @elements=grep $_->visible, @{$this->elements};
	foreach my $element (@elements) {
		my $question = $element->question;
		my $tag = $question->template->template;
		my $type = $question->template->type;
		my $desc = $question->description;
		my $extdesc = $question->extended_description;
		my $default;
		if ($type eq 'select') {
			$default = $element->translate_default;
		} elsif ($type eq 'multiselect') {
			$default = join ', ', $element->translate_default;
		} else {
			$default = $question->value;
		}

                $this->talk('DATA', $tag, 'type', $type);

		if ($desc) {
			$desc =~ s/\n/\\n/g;
			$this->talk('DATA', $tag, 'description', $desc);
		}

		if ($extdesc) {
			$extdesc =~ s/\n/\\n/g;
			$this->talk('DATA', $tag, 'extended_description',
			            $extdesc);
		}

		if ($type eq "select" || $type eq "multiselect") {
			my $choices = $question->choices;
			$choices =~ s/\n/\\n/g if ($choices);
			$this->talk('DATA', $tag, 'choices', $choices);
		}

		$this->talk('SET', $tag, $default) if $default ne '';

		my @vars=$Debconf::Db::config->variables($question->{name});
		for my $var (@vars) {
			my $val=$Debconf::Db::config->getvariable($question->{name}, $var);
			$val='' unless defined $val;
			$this->talk('SUBST', $tag, $var, $val);
		}

		$this->talk('INPUT', $question->priority, $tag);
	}

	if (@elements && (scalar($this->talk('GO')) eq "30") && $this->{capb_backup}) {
		return;
	}
	
	foreach my $element (@{$this->elements}) {
		if ($element->visible) {
			my $tag = $element->question->template->template;
			my $type = $element->question->template->type;

			my ($ret, $val)=$this->talk('GET', $tag);
			if ($ret eq "0") {
				if ($type eq 'select') {
					$element->value($element->translate_to_C($val));
				} elsif ($type eq 'multiselect') {
					$element->value(join(', ', map { $element->translate_to_C($_) } split(', ', $val)));
				} else {
					$element->value($val);
				}
				debug developer => "Got \"$val\" for $tag";
			}
		} else {
			$element->show;
		}
	}

	return 1;
}


sub progress_data {
	my $this=shift;
	my $question=shift;

	my $tag=$question->template->template;
	my $type=$question->template->type;
	my $desc=$question->description;
	my $extdesc=$question->extended_description;

	$this->talk('DATA', $tag, 'type', $type);

	if ($desc) {
		$desc =~ s/\n/\\n/g;
		$this->talk('DATA', $tag, 'description', $desc);
	}

	if ($extdesc) {
		$extdesc =~ s/\n/\\n/g;
		$this->talk('DATA', $tag, 'extended_description', $extdesc);
	}
}

sub progress_start {
	my $this=shift;

	$this->progress_data($_[2]);
	return $this->talk('PROGRESS', 'START', $_[0], $_[1], $_[2]->template->template);
}

sub progress_set {
	my $this=shift;

	return (scalar($this->talk('PROGRESS', 'SET', $_[0])) ne "30");
}

sub progress_step {
	my $this=shift;

	return (scalar($this->talk('PROGRESS', 'STEP', $_[0])) ne "30");
}

sub progress_info {
	my $this=shift;

	$this->progress_data($_[0]);
	return (scalar($this->talk('PROGRESS', 'INFO', $_[0]->template->template)) ne "30");
}

sub progress_stop {
	my $this=shift;

	return $this->talk('PROGRESS', 'STOP');
}

sub shutdown {
	my $this=shift;
	$this->SUPER::shutdown();
	if (defined $this->{readfh} &&
	   (not defined $this->{writefh} or $this->{readfh} != $this->{writefh}))
	{
		close $this->{readfh};
		delete $this->{readfh};
	}
	if (defined $this->{writefh}) {
		close $this->{writefh};
		delete $this->{writefh};
	}
}


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