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Disk ARchive
2.5.2
Full featured and portable backup and archiving tool
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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 00026 00027 #ifndef FICHIER_LOCAL_HPP 00028 #define FICHIER_LOCAL_HPP 00029 00030 00031 #include "../my_config.h" 00032 00033 extern "C" 00034 { 00035 #if HAVE_UNISTD_H 00036 #include <unistd.h> 00037 #endif 00038 } // end extern "C" 00039 00040 #include "integers.hpp" 00041 #include "thread_cancellation.hpp" 00042 #include "label.hpp" 00043 #include "crc.hpp" 00044 #include "user_interaction.hpp" 00045 #include "mem_ui.hpp" 00046 #include "fichier_global.hpp" 00047 00048 #include <string> 00049 00050 namespace libdar 00051 { 00052 00055 00056 00057 class fichier_local : public fichier_global 00058 { 00059 public : 00060 00061 // constructors 00062 00063 fichier_local(user_interaction & dialog, 00064 const std::string & chemin, 00065 gf_mode m, 00066 U_I permission, 00067 bool fail_if_exists, 00068 bool erase, 00069 bool furtive_mode); 00070 fichier_local(const std::string & chemin, bool furtive_mode = false); // builds a read-only object 00071 fichier_local(const fichier_local & ref) : fichier_global(ref) { copy_from(ref); }; 00072 00073 // assignment operator 00074 const fichier_local & operator = (const fichier_local & ref) { detruit(); copy_parent_from(ref); copy_from(ref); return *this; }; 00075 00076 // destructor 00077 ~fichier_local() { detruit(); }; 00078 00079 00081 virtual void change_ownership(const std::string & user, const std::string & group); 00082 00084 virtual void change_permission(U_I perm); 00085 00087 infinint get_size() const; 00088 00090 void fadvise(advise adv) const; 00091 00092 // inherited from generic_file 00093 bool skippable(skippability direction, const infinint & amount) { return true; }; 00094 bool skip(const infinint & pos); 00095 bool skip_to_eof(); 00096 bool skip_relative(S_I x); 00097 infinint get_position() const; 00098 00102 S_I give_fd_and_terminate() { int ret = filedesc; filedesc = -1; terminate(); return ret; }; 00103 00104 protected : 00105 // inherited from generic_file grand-parent class 00106 void inherited_read_ahead(const infinint & amount) { fadvise(fichier_global::advise_sequential); }; 00107 void inherited_sync_write() { fsync(); }; 00108 void inherited_flush_read() {}; // nothing stored in transit in this object 00109 void inherited_terminate() { if(adv == advise_dontneed) fadvise(adv); }; 00110 00111 // inherited from fichier_global parent class 00112 U_I fichier_global_inherited_write(const char *a, U_I size); 00113 bool fichier_global_inherited_read(char *a, U_I size, U_I & read, std::string & message); 00114 00115 private : 00116 S_I filedesc; 00117 advise adv; 00118 00119 void open(const std::string & chemin, 00120 gf_mode m, 00121 U_I permission, 00122 bool fail_if_exists, 00123 bool erase, 00124 bool furtive_mode); 00125 00126 void copy_from(const fichier_local & ref); 00127 void copy_parent_from(const fichier_local & ref); 00128 void detruit() { if(filedesc >= 0) close(filedesc); filedesc = -1; }; 00129 int advise_to_int(advise arg) const; 00130 00132 00136 void fsync() const; 00137 00138 }; 00139 00141 00142 } // end of namespace 00143 00144 #endif