filesystem_hard_link_write.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2026 Denis Corbin
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// to contact the author, see the AUTHOR file
/*********************************************************************/

 
#ifndef FILESYSTEM_HARD_LINK_WRITE_HPP
#define FILESYSTEM_HARD_LINK_WRITE_HPP
 
#include "../my_config.h"
 
extern "C"
{
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
 
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
} // end extern "C"
 
#include <map>
#include "catalogue.hpp"
#include "infinint.hpp"
#include "fsa_family.hpp"
#include "cat_all_entrees.hpp"
 
#include <set>
 
namespace libdar
{

 
    class filesystem_hard_link_write : protected mem_ui
    {
            // this class is not to be used directly
            // it only provides routines to its inherited classes
 
    public:
    filesystem_hard_link_write(const std::shared_ptr<user_interaction> & dialog): mem_ui(dialog) { corres_write.clear(); };
    filesystem_hard_link_write(const filesystem_hard_link_write & ref) = delete;
    filesystem_hard_link_write(filesystem_hard_link_write && ref) = delete;
    filesystem_hard_link_write & operator = (const filesystem_hard_link_write & ref) = delete;
    filesystem_hard_link_write & operator = (filesystem_hard_link_write && ref) = delete;
    ~filesystem_hard_link_write() = default;
 
        void write_hard_linked_target_if_not_set(const cat_mirage *ref, const std::string & chemin);
            // if a hard linked inode has not been restored (no change, or less recent than the one on filesystem)
            // it is necessary to inform filesystem, where to hard link on, any future hard_link
            // that could be necessary to restore.

        bool known_etiquette(const infinint & eti);


        void clear_corres_if_pointing_to(const infinint & ligne, const std::string & path);
 
    protected:
        void corres_reset() { corres_write.clear(); };


        void make_file(const cat_nomme * ref,
               const path & ou);


        bool raw_set_ea(const cat_nomme *e,
            const ea_attributs & list_ea,
            const std::string & spot,
            const mask & ea_mask);
            // check whether the inode for which to restore EA is not a hard link to
            // an already restored inode. if not, it calls the proper ea_filesystem call to restore EA


    bool raw_clear_ea_set(const cat_nomme *e, const std::string & path);
 
 
    private:
        struct corres_ino_ea
        {
            std::string chemin;
            bool ea_restored;
        };
 
        std::map <infinint, corres_ino_ea> corres_write;
    };

 
} // end of namespace
 
#endif