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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2006, 2007 Ciaran McCreesh <ciaranm@ciaranm.org>
+ *
+ * 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/digests/md5.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 <list>
+
+#include <cstdlib>
+#include <errno.h>
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+using namespace paludis;
+using namespace merge;
+
+using std::cout;
+using std::cerr;
+using std::endl;
+using std::ifstream;
+
+namespace
+{
+ int exit_status;
+
+ template <typename Iter_>
+ void unmerge_contents(const FSEntry & root, const Iter_ begin, const Iter_ end)
+ {
+ using std::istreambuf_iterator;
+
+ for (Iter_ cur(begin) ; cur != end ; ++cur)
+ {
+ std::vector<std::string> tokens;
+ WhitespaceTokeniser::get_instance()->tokenise(*cur, std::back_inserter(tokens));
+ if (tokens.empty())
+ continue;
+
+ if ("obj" == tokens.at(0))
+ {
+ while (tokens.size() > 4)
+ {
+ if (std::string::npos != tokens.at(4).find('='))
+ break;
+
+ tokens.at(1).append(" " + tokens.at(2));
+ for (unsigned i = 2 ; i < tokens.size() - 1 ; ++i)
+ tokens.at(i) = tokens.at(i + 1);
+ tokens.pop_back();
+ }
+
+ if (tokens.size() != 4)
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Malformed VDB entry '" + *cur + "'");
+ exit_status |= 4;
+ }
+ else if (! (root / tokens.at(1)).is_regular_file())
+ cout << "--- [!type] " << tokens.at(1) << endl;
+ else if (stringify((root / tokens.at(1)).mtime()) != tokens.at(3))
+ cout << "--- [!time] " << tokens.at(1) << endl;
+ else
+ {
+ ifstream md5_file(stringify(root / tokens.at(1)).c_str());
+ if (! md5_file)
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Couldn't get md5 for '" + stringify(root / tokens.at(1)) + "'");
+ cout << "--- [!md5?] " << tokens.at(1) << endl;
+ }
+ else if (MD5(md5_file).hexsum() != tokens.at(2))
+ cout << "--- [!md5 ] " << tokens.at(1) << endl;
+ else if (is_config_protected(root, root / tokens.at(1)))
+ cout << "--- [cfgpr] " << tokens.at(1) << endl;
+ else
+ {
+ cout << "<<< " << tokens.at(1) << endl;
+
+ mode_t mode((root / tokens.at(1)).permissions());
+ if ((mode & S_ISUID) || (mode & S_ISGID))
+ {
+ mode &= 0400;
+ (root / tokens.at(1)).chmod(mode);
+ }
+ (root / tokens.at(1)).unlink();
+ }
+ }
+ }
+ else if ("sym" == tokens.at(0))
+ {
+ while (tokens.size() > 5)
+ {
+ if (std::string::npos != tokens.at(2).find('='))
+ break;
+
+ if (tokens.at(2) == "->")
+ break;
+
+ tokens.at(1).append(" " + tokens.at(2));
+ for (unsigned i = 2 ; i < tokens.size() - 1; ++i)
+ tokens.at(i) = tokens.at(i + 1);
+ tokens.pop_back();
+ }
+
+ while (tokens.size() > 5)
+ {
+ if (std::string::npos != tokens.at(2).find('='))
+ break;
+
+ if (tokens.at(4) == "->")
+ break;
+
+ tokens.at(3).append(" " + tokens.at(4));
+ for (unsigned i = 4 ; i < tokens.size() - 1; ++i)
+ tokens.at(i) = tokens.at(i + 1);
+ tokens.pop_back();
+ }
+
+ if (tokens.size() != 5)
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Malformed VDB entry '" + *cur + "'");
+ exit_status |= 4;
+ }
+ else if (! (root / tokens.at(1)).is_symbolic_link())
+ cout << "--- [!type] " << tokens.at(1) << endl;
+ else if (stringify((root / tokens.at(1)).mtime()) != tokens.at(4))
+ cout << "--- [!time] " << tokens.at(1) << endl;
+ else if ((root / tokens.at(1)).readlink() != tokens.at(3))
+ cout << "--- [!dest] " << tokens.at(1) << endl;
+ else
+ {
+ cout << "<<< " << tokens.at(1) << endl;
+ (root / tokens.at(1)).unlink();
+ }
+ }
+ else if ("misc" == tokens.at(0))
+ {
+ }
+ else if ("fif" == tokens.at(0) || "dev" == tokens.at(0))
+ {
+ while (tokens.size() > 2)
+ {
+ if (std::string::npos != tokens.at(2).find('='))
+ break;
+
+ tokens.at(1).append(" " + tokens.at(2));
+ for (unsigned i = 2 ; i < tokens.size() - 1; ++i)
+ tokens.at(i) = tokens.at(i + 1);
+ tokens.pop_back();
+ }
+
+ if (tokens.size() != 2)
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Malformed VDB entry '" + *cur + "'");
+ exit_status |= 8;
+ }
+ else if ("fif" == tokens.at(0) && ! (root / tokens.at(1)).is_fifo())
+ cout << "--- [!type] " << tokens.at(1) << endl;
+ else if ("dev" == tokens.at(0) && ! (root / tokens.at(1)).is_device())
+ cout << "--- [!type] " << tokens.at(1) << endl;
+ else
+ {
+ cout << "<<< " << tokens.at(1) << endl;
+ (root / tokens.at(1)).unlink();
+ }
+ }
+ else if ("dir" == tokens.at(0))
+ /* nothing */ ;
+ else
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Skipping unknown VDB entry '" + *cur + "'");
+ exit_status |= 2;
+ }
+ }
+ }
+
+ template <typename Iter_>
+ void unmerge_directories(const FSEntry & root, const Iter_ begin, const Iter_ end)
+ {
+ using std::istreambuf_iterator;
+
+ for (Iter_ cur(begin) ; cur != end ; ++cur)
+ {
+ std::vector<std::string> tokens;
+ WhitespaceTokeniser::get_instance()->tokenise(*cur, std::back_inserter(tokens));
+ if (tokens.empty())
+ continue;
+
+ if ("dir" == tokens.at(0))
+ {
+ while (tokens.size() > 2)
+ {
+ if (std::string::npos != tokens.at(2).find('='))
+ break;
+
+ tokens.at(1).append(" " + tokens.at(2));
+ for (unsigned i = 2 ; i < tokens.size() - 1; ++i)
+ tokens.at(i) = tokens.at(i + 1);
+ tokens.pop_back();
+ }
+
+ if (tokens.size() != 2)
+ {
+ Log::get_instance()->message(ll_warning, lc_no_context,
+ "Malformed VDB entry '" + *cur + "'");
+ exit_status |= 8;
+ }
+ else if (! (root / tokens.at(1)).is_directory())
+ cout << "--- [!type] " << tokens.at(1) << endl;
+ else if (DirIterator((root / tokens.at(1)), false) != DirIterator())
+ cout << "--- [!empt] " << tokens.at(1) << endl;
+ else
+ {
+ cout << "<<< " << tokens.at(1) << endl;
+ (root / tokens.at(1)).rmdir();
+ }
+ }
+ }
+ }
+}
+
+int
+main(int argc, char * argv[])
+{
+ Context context("In main program:");
+ exit_status = 0;
+ try
+ {
+ if (argc != 3)
+ throw Failure("Usage: " + stringify(argv[0]) + " root contents");
+
+ Log::get_instance()->set_program_name(argv[0]);
+ std::string log_level(getenv_with_default("PALUDIS_EBUILD_LOG_LEVEL", "qa"));
+
+ if (log_level == "debug")
+ Log::get_instance()->set_log_level(ll_debug);
+ else if (log_level == "qa")
+ Log::get_instance()->set_log_level(ll_qa);
+ else if (log_level == "warning")
+ Log::get_instance()->set_log_level(ll_warning);
+ else if (log_level == "silent")
+ Log::get_instance()->set_log_level(ll_silent);
+ else
+ throw Failure("bad value for log level");
+
+ FSEntry root(argv[1]), contents(argv[2]);
+
+ if (! ((root = root.realpath())).is_directory())
+ throw Failure(stringify(argv[1]) + ": not a directory");
+
+ ifstream contents_file(stringify(contents).c_str());
+ if (! contents_file)
+ throw Failure(stringify(contents) + ": not readable");
+
+ std::list<std::string> lines;
+ std::string line;
+ while (std::getline(contents_file, line))
+ lines.push_back(line);
+
+ unmerge_contents(root, lines.begin(), lines.end());
+ unmerge_directories(root, lines.rbegin(), lines.rend());
+ return exit_status;
+ }
+ catch (const Failure & f)
+ {
+ cerr << argv[0] << ": fatal error: " << f.message << endl;
+ return EXIT_FAILURE;
+ }
+ catch (const Exception & e)
+ {
+ cerr << argv[0] << ": fatal error:" << endl
+ << " * " << e.backtrace("\n * ") << e.message()
+ << " (" << e.what() << ")" << endl;
+ return EXIT_FAILURE;
+ }
+ catch (const std::exception & e)
+ {
+ cerr << argv[0] << ": fatal error: " << e.what() << endl;
+ return EXIT_FAILURE;
+ }
+}
+
+
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