/usr/share/perl5/Debconf/FrontEnd/Passthrough.pm is in debconf 1.5.51ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file was preprocessed, do not edit!
package Debconf::FrontEnd::Passthrough;
use strict;
use Carp;
use IO::Socket;
use IO::Handle;
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);
my ($READFD, $WRITEFD, $SOCKET);
if (defined $ENV{DEBCONF_PIPE}) {
$SOCKET = $ENV{DEBCONF_PIPE};
} elsif (defined $ENV{DEBCONF_READFD} && defined $ENV{DEBCONF_WRITEFD}) {
$READFD = $ENV{DEBCONF_READFD};
$WRITEFD = $ENV{DEBCONF_WRITEFD};
} else {
die "Neither DEBCONF_PIPE nor DEBCONF_READFD and DEBCONF_WRITEFD were set\n";
}
sub init {
my $this=shift;
if (defined $SOCKET) {
$this->{readfh} = $this->{writefh} = IO::Socket::UNIX->new(
Type => SOCK_STREAM,
Peer => $SOCKET
) || croak "Cannot connect to $SOCKET: $!";
} else {
$this->{readfh} = IO::Handle->new_from_fd(int($READFD), "r") || croak "Failed to open fd $READFD: $!";
$this->{writefh} = IO::Handle->new_from_fd(int($WRITEFD), "w") || croak "Failed to open fd $WRITEFD: $!";
}
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 talk {
my $this=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 => "----> $command";
print $writefh $command."\n";
$writefh->flush;
$reply = <$readfh>;
chomp($reply);
debug developer => "<---- $reply";
my ($tag, $val) = split(' ', $reply, 2);
$val = '' unless defined $val;
$val = Debconf::Encoding::convert("UTF-8", $val);
return ($tag, $val) if wantarray;
return $tag;
}
sub 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');
}
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