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diff --git a/0.4.0/ebuild/utils/merge_common.cc b/0.4.0/ebuild/utils/merge_common.cc
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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2006 Ciaran McCreesh <ciaran.mccreesh@blueyonder.co.uk>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "merge_common.hh"
+
+#include <paludis/util/dir_iterator.hh>
+#include <paludis/util/fs_entry.hh>
+#include <paludis/util/log.hh>
+#include <paludis/util/pstream.hh>
+#include <paludis/util/stringify.hh>
+#include <paludis/util/strip.hh>
+#include <paludis/util/system.hh>
+#include <paludis/util/tokeniser.hh>
+
+#include <algorithm>
+#include <fstream>
+#include <iomanip>
+#include <iostream>
+#include <iterator>
+#include <string>
+#include <vector>
+
+#include <cstdlib>
+#include <errno.h>
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+using namespace paludis;
+
+std::vector<std::string>
+merge::get_config_var(const std::string & var)
+{
+ std::vector<std::string> result;
+ WhitespaceTokeniser::get_instance()->tokenise(getenv_with_default(var, ""),
+ std::back_inserter(result));
+ return result;
+}
+
+bool
+merge::is_config_protected(const FSEntry & root, const FSEntry & file)
+{
+ static std::vector<std::string> cfg_pro(get_config_var("CONFIG_PROTECT")),
+ cfg_pro_mask(get_config_var("CONFIG_PROTECT_MASK"));
+
+ std::string file_str(stringify(file)), root_str(stringify(root));
+ if (0 != file_str.compare(0, root_str.length(), root_str))
+ throw Failure("is_config_protected confused: '" + root_str + "' '" + file_str + "'");
+ file_str.erase(0, root_str.length());
+ if (file_str.empty())
+ file_str = "/";
+
+ bool result(false);
+ for (std::vector<std::string>::const_iterator c(cfg_pro.begin()),
+ c_end(cfg_pro.end()) ; c != c_end && ! result ; ++c)
+ if (0 == fnmatch((*c + "/*").c_str(), file_str.c_str(), 0))
+ result = true;
+
+ for (std::vector<std::string>::const_iterator c(cfg_pro_mask.begin()),
+ c_end(cfg_pro_mask.end()) ; c != c_end && result ; ++c)
+ if (0 == fnmatch((*c + "/*").c_str(), file_str.c_str(), 0))
+ result = false;
+
+ return result;
+}
+