/usr/share/perl5/Debian/DocBase/DB.pm is in doc-base 0.10.7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# $Id: DB.pm 223 2011-02-28 23:34:22Z robert $
#
package Debian::DocBase::DB;
use strict;
use warnings;
use Debian::DocBase::Common;
use Debian::DocBase::Utils;
use Debian::DocBase::Gettext;
use YAML::Tiny;
my $filesdb = undef;
my $statusdb = undef;
sub new { # {{{
my $class = shift;
my $dbfile = shift;
my $enckey = shift;
my $self = {
YAML => YAML::Tiny->new,
DB => {},
FILE => $dbfile,
ENCKEY => $enckey,
CHANGED => 0
};
bless($self, $class);
$self->_Init();
return $self;
} # }}}
sub _Init() { # {{{
my $self = shift;
# # read-only access for `install-docs --status or --dump-db' run as non-root user
# my $readonly = $> != 0;
my $file = $self->{'FILE'};
if (-f $file)
{
eval { $self->{'YAML'} = YAML::Tiny->read ($file) }
or Fatal($ERR_DATABASE, _g("Cannot read file `%s': %s."), $file, $@);
}
else
{
$self->{'YAML'}->[0] = {};
}
$self->{'DB'} = \%{$self->{'YAML'}->[0]};
} # }}}
sub PutData($$$) { # {{{
my ($self, $key, $data) = @_;
$self->{'DB'}->{$self->EncodeKey($key)} = $data;
$self->{'CHANGED'} = 1;
} # }}}
sub GetData($$) { # {{{
my ($self, $key) = @_;
return $self->{'DB'}->{$self->EncodeKey($key)}
} # }}}
sub GetDBKeys() { # {{{
my $self = shift;
my @keys = grep { ! m|^/internal/| } keys %{$self->{'DB'}};
map { $_ = $self->DecodeKey($_) } @keys if $self->{'ENCKEY'};
return @keys;
} # }}}
sub _SaveDB() { # {{{
my $self = shift;
my $file = $self->{'FILE'};
Debug(_g("Saving `%s' (%d)."), $file, $self->{'CHANGED'});
return unless $self->{'CHANGED'};
my $readonly = $> != 0;
Fatal($ERR_PROCESSING, _g("Needs to be root for this operation.")) if $readonly;
(my $newfile = $file) =~ s/^[^\.]+/$&-new/g;
(my $oldfile = $file) =~ s/^[^\.]+/$&-old/g;
eval { $self->{'YAML'}->write($newfile) }
or Fatal($ERR_DATABASE, _g("Cannot save file `%s': %s."), $newfile, $@);
unlink $oldfile if -f $oldfile;
rename $file, $oldfile if -f $file;
rename $newfile, $file
or Fatal($ERR_DATABASE, _g("Cannot rename file `%s' to `%s': %s."), $newfile, $file, $!);
$self->{'CHANGED'} = 0;
} # }}}
sub RemoveData($$) # {{{
{
my ($self, $key) = @_;
delete $self->{'DB'}->{$self->EncodeKey($key)};
$self->{'CHANGED'} = 1;
} # }}}
sub Exists($) { # {{{
my ($self, $key) = @_;
my $data = $self->{'DB'}->{$self->EncodeKey($key)};
return $data && %{$data};
} # }}}
sub DumpDB($) { # {{{
my $self = shift;
my $db = $self->{'DB'};
Inform(_g("Contents of file `%s':")."\n", $self->{'FILE'});
print STDOUT YAML::Tiny::Dump($db);
} # }}}
sub EncodeKey($$) { # {{{
my ($self, $key) = @_;
return $key unless $self->{'ENCKEY'};
$key =~ s/\/+/\//go;
$key =~ s/^~/~~/o;
$key =~ s/^$CONTROL_DIR/~1/o;
$key =~ s/^$LOCAL_CONTROL_DIR/~2/o;
return $key;
} # }}}
sub DecodeKey($$) { # {{{
my ($self, $key) = @_;
return $key unless $self->{'ENCKEY'};
$key =~ s/^~1/$CONTROL_DIR/o;
$key =~ s/^~2/$LOCAL_CONTROL_DIR/o;
$key =~ s/^~~/~/o;
return $key;
} # }}}
### STATIC FUNCTIONS
sub GetFilesDB() { # {{{
$filesdb = Debian::DocBase::DB->new($DB_FILES, 1) unless $filesdb;
return $filesdb;
} # }}}
sub GetStatusDB() { # {{{
$statusdb = Debian::DocBase::DB->new($DB_STATUS, 0) unless $statusdb;
return $statusdb;
} # }}}
sub SaveDatabases()
{
IgnoreSignals();
$statusdb->_SaveDB() if $statusdb;
$filesdb->_SaveDB() if $filesdb;
RestoreSignals();
}
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