/usr/share/perl5/Config/Model/Backend/Dpkg.pm is in libconfig-model-dpkg-perl 2.076.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 | package Config::Model::Backend::Dpkg;
use Carp;
use Mouse;
use Config::Model::Exception;
use UNIVERSAL;
use File::Path;
use Log::Log4perl qw(get_logger :levels);
extends 'Config::Model::Backend::PlainFile';
my $logger = get_logger("Backend::Dpkg::Root");
sub read_hash {
my ( $self, $obj, $elt, $file, $check, $args ) = @_;
if ( $elt eq 'patches' ) {
my $patch_dir = $args->{root} . $args->{config_dir} . "patches";
$logger->info("Checking patches directory ($patch_dir)");
$self->read_patch_series( $obj, $check, $patch_dir, $args );
}
else {
$self->SUPER::read_hash(@_);
}
}
sub read_patch_series {
my ( $self, $hash, $check, $patch_dir, $args ) = @_;
my $series_files = "$patch_dir/series";
return unless -d $patch_dir;
return unless -e $series_files;
$logger->info("Opening file $series_files");
my $ser_io = IO::File->new($series_files);
unless ( defined $ser_io ) {
my $msg = "Dpkg::Patch error, cannot read $series_files:$!";
Config::Model::Exception::User->throw( message => $msg )
if $check eq 'yes';
$logger->error($msg) if $check eq 'skip';
}
# trigger element creation to read patch file_path
foreach my $pname ( $ser_io->getlines ) {
chomp $pname;
$pname =~ s/#.*//; # skip comment
next unless $pname =~ /\w/; # skip empty lines
my $obj = $hash->fetch_with_id($pname);
eval { $obj->init; };
my $e = $@;
if (ref($e) and $e ->isa('Config::Model::Exception::Syntax')) {
if ( $args->{check} eq 'yes' ) {
my $msg = $e ->message;
$e->message($msg. ". Use -force option to override" );
$e -> rethrow();
}
else {
warn "Warning: Ignoring patch $pname: ", $e->message,"\n";
}
$hash->delete($pname);
}
elsif (ref($e)) {
$e->rethrow ;
}
elsif ($e) {
die $e;
}
elsif ($logger->is_info) {
my $location = $obj->name;
$logger->info("found patch $pname, stored in $location ($obj)");
}
}
$ser_io->close;
}
sub write {
my $self = shift;
my %args = @_;
# args are:
# object => $obj, # Config::Model::Node object
# root => './my_test', # fake root directory, userd for tests
# config_dir => /etc/foo', # absolute path read
# file => 'foo.conf', # file name
# file_path => './my_test/etc/foo/foo.conf'
# io_handle => $io # IO::File object
# check => yes|no|skip
my $check = $args{check} || 'yes';
my $dir = $args{root} . $args{config_dir};
mkpath( $dir, { mode => 0755 } ) unless -d $dir;
my $node = $args{object};
$logger->debug( "Dpkg write called on node ", $node->name );
# write data from leaf element from the node
foreach my $elt ( $node->get_element_name() ) {
my $file = $dir . $elt;
my $obj = $args{object}->fetch_element( name => $elt );
my $type = $obj->get_type;
my @v;
if ( $type eq 'leaf' ) {
my $lv = $obj->fetch( check => $args{check} );
if ( defined $lv ) {
$lv .= "\n" unless $obj->value_type eq 'string';
push @v, $lv;
}
}
elsif ( $type eq 'list' ) {
@v = map { "$_\n" } $obj->fetch_all_values;
}
else {
$logger->debug("Dpkg write skipped $type $elt");
}
if (@v) {
$logger->trace("Dpkg write opening $file to write");
my $fh = new IO::File;
$fh->open( $file, '>' ) or die "Cannot open $file:$!";
$fh->binmode(":utf8");
$fh->print(@v);
$fh->close;
}
}
return 1;
}
no Mouse;
__PACKAGE__->meta->make_immutable;
1;
__END__
=head1 NAME
Config::Model::Backend::Dpkg - Read and write config as plain file
=head1 SYNOPSIS
use Config::Model;
use Log::Log4perl qw(:easy);
Log::Log4perl->easy_init($WARN);
my $model = Config::Model->new;
my $inst = $model->create_config_class(
name => "WithDpkg",
element => [
[qw/source new/] => { qw/type leaf value_type uniline/ },
],
read_config => [
{
backend => 'plain_file',
config_dir => '/tmp',
},
],
);
my $inst = $model->instance(root_class_name => 'WithDpkg' );
my $root = $inst->config_root ;
$root->load('source=foo new=yes' );
$inst->write_back ;
Now C</tmp> directory will contain 2 files: C<source> and C<new>
with C<foo> and C<yes> inside.
=head1 DESCRIPTION
This module is used directly by L<Config::Model> to read or write the
content of a configuration tree written in several files.
Each element of the node is written in a plain file.
This module supports currently only leaf and list elements.
In the case of C<list> element, each line of the file is a value of the list.
=head1 CONSTRUCTOR
=head2 new ( node => $node_obj, name => 'plain_file' ) ;
Inherited from L<Config::Model::Backend::Any>. The constructor will be
called by L<Config::Model::AutoRead>.
=head2 read ( io_handle => ... )
Of all parameters passed to this read call-back, only C<io_handle> is
used. This parameter must be L<IO::File> object already opened for
read.
It can also be undef. In this case, C<read()> will return 0.
When a file is read, C<read()> will return 1.
=head2 write ( io_handle => ... )
Of all parameters passed to this write call-back, only C<io_handle> is
used. This parameter must be L<IO::File> object already opened for
write.
C<write()> will return 1.
=head1 AUTHOR
Dominique Dumont, (ddumont at cpan dot org)
=head1 SEE ALSO
L<Config::Model>,
L<Config::Model::BackendMgr>,
L<Config::Model::Backend::Any>,
=cut
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