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diff --git a/src/os-plugins/plugins/vmchooser/OpenSLX/Distro/Base.pm b/src/os-plugins/plugins/vmchooser/OpenSLX/Distro/Base.pm
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+++ b/src/os-plugins/plugins/vmchooser/OpenSLX/Distro/Base.pm
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+# Copyright (c) 2008 - OpenSLX GmbH
+#
+# This program is free software distributed under the GPL version 2.
+# See http://openslx.org/COPYING
+#
+# If you have any feedback please consult http://openslx.org/feedback and
+# send your suggestions, praise, or complaints to feedback@openslx.org
+#
+# General information about OpenSLX can be found at http://openslx.org/
+# -----------------------------------------------------------------------------
+# vmchooser/OpenSLX/Distro/Base.pm
+# - provides base implementation of the Distro API for the vmchooser plugin.
+# -----------------------------------------------------------------------------
+package vmchooser::OpenSLX::Distro::Base;
+
+use strict;
+use warnings;
+
+our $VERSION = 1.01; # API-version . implementation-version
+
+use File::Basename;
+use File::Path;
+use Scalar::Util qw( weaken );
+
+use OpenSLX::Basics;
+use OpenSLX::Utils;
+
+################################################################################
+### interface methods
+################################################################################
+sub new
+{
+ my $class = shift;
+ my $self = {};
+ return bless $self, $class;
+}
+
+sub initialize
+{
+ my $self = shift;
+ $self->{engine} = shift;
+ weaken($self->{engine});
+ # avoid circular reference between plugin and its engine
+
+ return 1;
+}
+
+
+sub copyDefaultSession
+{
+ my $self = shift;
+ my $pluginroot = shift;
+
+
+ # Take the default path of SuSE
+ # (as we have the most experience with it)
+ if( -f "/etc/X11/session/default.desktop") {
+ rename("/etc/X11/session/default.desktop",
+ "/etc/X11/session/default.desktop.back")
+ }
+ copyFile("$pluginroot/default.desktop","/etc/X11/session");
+
+ return 1;
+} \ No newline at end of file