![]() |
Disk ARchive
2.5.2
Full featured and portable backup and archiving tool
|
00001 /*********************************************************************/ 00002 // dar - disk archive - a backup/restoration program 00003 // Copyright (C) 2002-2052 Denis Corbin 00004 // 00005 // This program is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU General Public License 00007 // as published by the Free Software Foundation; either version 2 00008 // of the License, or (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00018 // 00019 // to contact the author : http://dar.linux.free.fr/email.html 00020 /*********************************************************************/ 00021 00025 00026 #ifndef USER_GROUP_BASES_HPP 00027 #define USER_GROUP_BASES_HPP 00028 00029 #include "../my_config.h" 00030 00031 #ifdef __DYNAMIC__ 00032 00033 extern "C" 00034 { 00035 #if MUTEX_WORKS 00036 #if HAVE_PTHREAD_H 00037 #include <pthread.h> 00038 #endif 00039 #endif 00040 } 00041 00042 #include <map> 00043 #include <string> 00044 #include "infinint.hpp" 00045 00046 namespace libdar 00047 { 00048 00051 00052 class user_group_bases 00053 { 00054 public: 00055 user_group_bases() : filled(false) {}; 00056 00058 00060 const std::string & get_username(const infinint & uid) const; 00061 00062 00064 00066 const std::string & get_groupname(const infinint & gid) const; 00067 00068 00069 private: 00070 bool filled; 00071 std::map<infinint, std::string> user_database; 00072 std::map<infinint, std::string> group_database; 00073 00074 void fill() const; 00075 00076 static const std::string empty_string; 00077 #if MUTEX_WORKS 00078 // the system call used to read the password and group database are not re-entrant, the mutex 00079 // must block all other thread while a given thread is reading the databases 00080 // the best solution would have to let the user provide such a database object already filled 00081 // but that would rely on it not to destroy this object while threads are using it 00082 // for this reason, here the mutex is 'static' 00083 static pthread_mutex_t lock_fill; 00084 #endif 00085 }; 00086 00087 00089 00090 } // end of namespace 00091 00092 #endif 00093 00094 #endif