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cat_inode.hpp
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1 /*********************************************************************/
2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2020 Denis Corbin
4 //
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License
7 // as published by the Free Software Foundation; either version 2
8 // of the License, or (at your option) any later version.
9 //
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
14 //
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 //
19 // to contact the author : http://dar.linux.free.fr/email.html
20 /*********************************************************************/
21
25
26 #ifndef CAT_INODE_HPP
27 #define CAT_INODE_HPP
28
29 #include "../my_config.h"
30
31 extern "C"
32 {
33 } // end extern "C"
34
35 #include "infinint.hpp"
36 #include "ea.hpp"
37 #include "integers.hpp"
38 #include "mask.hpp"
39 #include "user_interaction.hpp"
40 #include "filesystem_specific_attribute.hpp"
41 #include "datetime.hpp"
42 #include "cat_nomme.hpp"
43 #include "archive_aux.hpp"
44
45 namespace libdar
46 {
49
51
52 class cat_inode : public cat_nomme
53 {
54 public:
55
57
58 cat_inode(const infinint & xuid,
59 const infinint & xgid,
60 U_16 xperm,
61 const datetime & last_access,
62 const datetime & last_modif,
63 const datetime & last_change,
64 const std::string & xname,
65 const infinint & device);
66 cat_inode(const std::shared_ptr<user_interaction> & dialog,
67 const smart_pointer<pile_descriptor> & pdesc,
68 const archive_version & reading_ver,
69 saved_status saved,
70 bool small);
71 cat_inode(const cat_inode & ref);
72 cat_inode(cat_inode && ref) noexcept: cat_nomme(std::move(ref)) { nullifyptr(); move_from(std::move(ref)); };
73 cat_inode & operator = (const cat_inode & ref);
74 cat_inode & operator = (cat_inode && ref) noexcept { cat_nomme::operator = (std::move(ref)); move_from(std::move(ref)); return *this; };
75 ~cat_inode() noexcept(false);
76
77 const infinint & get_uid() const { return uid; };
78 const infinint & get_gid() const { return gid; };
79 U_16 get_perm() const { return perm; };
80 datetime get_last_access() const { return last_acc; };
81 datetime get_last_modif() const { return last_mod; };
82 void set_last_access(const datetime & x_time) { last_acc = x_time; };
83 void set_last_modif(const datetime & x_time) { last_mod = x_time; };
84 infinint get_device() const { if(fs_dev == nullptr) throw SRC_BUG; return *fs_dev; };
85
86 bool same_as(const cat_inode & ref) const;
87 bool is_more_recent_than(const cat_inode & ref, const infinint & hourshift) const;
88 // used for RESTORATION
89 virtual bool has_changed_since(const cat_inode & ref, const infinint & hourshift, comparison_fields what_to_check) const;
90 // signature() left as an abstract method
91 // clone is abstract too
92 // used for INCREMENTAL BACKUP
93 void compare(const cat_inode &other,
94 const mask & ea_mask,
95 comparison_fields what_to_check,
96 const infinint & hourshift,
97 bool symlink_date,
98 const fsa_scope & scope,
99 bool isolated_mode) const;
100
101 // throw Erange exception if a difference has been detected
102 // this is not a symetrical comparison, but all what is present
103 // in the current object is compared against the argument
104 // which may contain supplementary informations
105 // used for DIFFERENCE
106
107
108
110 // EXTENDED ATTRIBUTES Methods
111 //
112
113 // I : to know whether EA data is present or not for this object
114 void ea_set_saved_status(ea_saved_status status);
115 ea_saved_status ea_get_saved_status() const { return ea_saved; };
116
117 // II : to associate EA list to an cat_inode object (mainly for backup operation) #EA_FULL only#
118 void ea_attach(ea_attributs *ref);
119
121 const ea_attributs *get_ea() const; // #<-- EA_FULL *and* EA_REMOVED# for this call only
122 void ea_detach() const; //discards any future call to get_ea() !
123 infinint ea_get_size() const; //returns the size of EA (still valid if ea have been detached) mainly used to define CRC width
124
125 // III : to record where is dump the EA in the archive #EA_FULL only#
126 void ea_set_offset(const infinint & pos);
127 bool ea_get_offset(infinint & pos) const;
128 void ea_set_crc(const crc & val);
129 void ea_get_crc(const crc * & ptr) const;
130 bool ea_get_crc_size(infinint & val) const;
131
132 // IV : to know/record if EA and FSA have been modified # any EA status# and FSA status #
133 datetime get_last_change() const { return last_cha; };
134 void set_last_change(const datetime & x_time) { last_cha = x_time; };
135 bool has_last_change() const { return !last_cha.is_null(); };
136 // old format did provide last_change only when EA were present, since archive
137 // format 8, this field is always present even in absence of EA. Thus it is
138 // still necessary to check if the cat_inode has a last_change() before
139 // using get_last_change() (depends on the version of the archive read).
140
141
143 // FILESYSTEM SPECIFIC ATTRIBUTES Methods
144 //
145
146 // I : which FSA are present
147 void fsa_set_saved_status(fsa_saved_status status);
148 fsa_saved_status fsa_get_saved_status() const { return fsa_saved; };
150 fsa_scope fsa_get_families() const { if(fsa_families == nullptr) throw SRC_BUG; return infinint_to_fsa_scope(*fsa_families); };
151
152
153
154 // II : add or drop FSA list to the cat_inode
155 void fsa_attach(filesystem_specific_attribute_list *ref);
156 void fsa_partial_attach(const fsa_scope & val); // #<-- FSA_PARTIAL only
157 const filesystem_specific_attribute_list *get_fsa() const; // #<-- FSA_FULL only
158 void fsa_detach() const; // discard any future call to get_fsa() !
159 infinint fsa_get_size() const; // returns the size of FSA (still valid if fsal has been detached) / mainly used to define CRC size
160
161 // III : to record where FSA are dumped in the archive (only if fsa_status not empty !)
162 void fsa_set_offset(const infinint & pos);
163 bool fsa_get_offset(infinint & pos) const;
164 void fsa_set_crc(const crc & val);
165 void fsa_get_crc(const crc * & ptr) const;
166 bool fsa_get_crc_size(infinint & val) const;
167
168 protected:
169 virtual void sub_compare(const cat_inode & other, bool isolated_mode) const {};
170 bool get_small_read() const { return small_read; };
171
172 // inherited from cat_entree
173 virtual void inherited_dump(const pile_descriptor & pdesc, bool small) const override;
174
175
176 private :
177 infinint uid;
178 infinint gid;
179 U_16 perm;
180 datetime last_acc;
181 datetime last_mod;
182 datetime last_cha;
183 ea_saved_status ea_saved;
184 fsa_saved_status fsa_saved;
185
186 bool small_read;
187
188 // the following is used only if ea_saved == full
189 infinint *ea_offset;
190 ea_attributs *ea;
191 infinint *ea_size;
192 // the following is used if ea_saved == full or ea_saved == partial or
193 crc *ea_crc;
194
195 infinint *fsa_families;
196 infinint *fsa_offset;
197 filesystem_specific_attribute_list *fsal;
198 infinint *fsa_size;
199 crc *fsa_crc;
200 //
201 infinint *fs_dev;
202 archive_version edit;
203
204
205 void nullifyptr() noexcept;
206 void destroy() noexcept;
207 void copy_from(const cat_inode & ref);
208 void move_from(cat_inode && ref) noexcept;
209
210 static const ea_attributs empty_ea;
211 };
212
214
215 } // end of namespace
216
217 #endif
cat_nomme.hpp
base class of all objects contained in a catalogue and that can be named
libdar::cat_inode::last_acc
datetime last_acc
last access time (atime)
Definition: cat_inode.hpp:180
filesystem_specific_attribute.hpp
filesystem specific attributes
mask.hpp
here lies a collection of mask classes
libdar::cat_inode::ea
ea_attributs * ea
Extended Attributes read or to be written down.
Definition: cat_inode.hpp:190
libdar::cat_inode::fsa_offset
infinint * fsa_offset
offset in archive where to find FSA # always allocated (to be reviewed)
Definition: cat_inode.hpp:196
libdar::cat_inode::last_cha
datetime last_cha
last inode meta data change (ctime)
Definition: cat_inode.hpp:182
user_interaction.hpp
defines the interaction interface between libdar and users.
integers.hpp
are defined here basic integer types that tend to be portable
libdar::saved_status
saved_status
data saved status for an entry
Definition: cat_status.hpp:45
libdar::cat_inode::fsa_saved
fsa_saved_status fsa_saved
inode Filesystem Specific Attribute status
Definition: cat_inode.hpp:184
libdar::fsa_saved_status
fsa_saved_status
FSA saved status for an entry.
Definition: cat_status.hpp:74
libdar::cat_inode::ea_crc
crc * ea_crc
CRC computed on EA.
Definition: cat_inode.hpp:193
infinint.hpp
switch module to limitint (32 ou 64 bits integers) or infinint
libdar::infinint
the arbitrary large positive integer class
Definition: real_infinint.hpp:62
libdar::cat_nomme
the base class for all entry that have a name
Definition: cat_nomme.hpp:45
libdar::mask
the generic class, parent of all masks
Definition: mask.hpp:62
datetime.hpp
this file contains the definition of class datetime that stores unix times in a portable way
ea.hpp
contains a set of routines to manage EA values associated to a file
libdar::cat_inode
the root class for all cat_inode
Definition: cat_inode.hpp:53
libdar::archive_version
class archive_version manages the version of the archive format
Definition: archive_version.hpp:47
libdar::datetime::is_null
bool is_null() const
return true if the datetime is exactly January 1st, 1970, 0 h 0 mn 0 s
Definition: datetime.hpp:131
libdar::cat_inode::perm
U_16 perm
inode's permission
Definition: cat_inode.hpp:179
libdar::crc
pure virtual class defining interface of a CRC object
Definition: crc.hpp:47
libdar::cat_inode::ea_saved
ea_saved_status ea_saved
inode Extended Attribute status
Definition: cat_inode.hpp:183
libdar::cat_inode::compare
void compare(const cat_inode &other, const mask &ea_mask, comparison_fields what_to_check, const infinint &hourshift, bool symlink_date, const fsa_scope &scope, bool isolated_mode) const
do not try to compare pointed to data, EA of FSA (suitable for isolated catalogue)
libdar::cat_inode::inherited_dump
virtual void inherited_dump(const pile_descriptor &pdesc, bool small) const override
true if object has been created by sequential reading of an archive
libdar::ea_saved_status
ea_saved_status
EA saved status for an entry.
Definition: cat_status.hpp:56
libdar::cat_inode::ea_get_crc_size
bool ea_get_crc_size(infinint &val) const
returns true if crc is know and puts its width in argument
libdar::cat_inode::small_read
bool small_read
whether we the object has been built with sequential-reading
Definition: cat_inode.hpp:186
libdar::datetime
stores time information
Definition: datetime.hpp:59
libdar::cat_inode::last_mod
datetime last_mod
last modification time (mtime)
Definition: cat_inode.hpp:181
archive_aux.hpp
set of datastructures used to interact with a catalogue object
libdar::cat_inode::fsa_get_families
fsa_scope fsa_get_families() const
gives the set of FSA family recorded for that inode
Definition: cat_inode.hpp:150
libdar::cat_inode::fsa_families
infinint * fsa_families
list of FSA families present for that inode (set to nullptr in fsa_none mode)
Definition: cat_inode.hpp:195
libdar::comparison_fields
comparison_fields
how to consider file change during comparison and incremental backup
Definition: archive_aux.hpp:53
libdar::cat_inode::cat_inode
cat_inode(const infinint &xuid, const infinint &xgid, U_16 xperm, const datetime &last_access, const datetime &last_modif, const datetime &last_change, const std::string &xname, const infinint &device)
flag used to only consider certain fields when comparing/restoring inodes
libdar::cat_inode::edit
archive_version edit
need to know EA and FSA format used in archive file
Definition: cat_inode.hpp:202
libdar::cat_inode::ea_get_crc
void ea_get_crc(const crc *&ptr) const
the argument is set to point to an allocated crc object owned by this "cat_inode" object,...
libdar::cat_inode::fsal
filesystem_specific_attribute_list * fsal
Filesystem Specific Attributes read or to be written down # only allocated if fsa_saved if set to FUL...
Definition: cat_inode.hpp:197
libdar::cat_inode::fs_dev
infinint * fs_dev
filesystem ID on which resides the inode (only used when read from filesystem)
Definition: cat_inode.hpp:201
libdar::cat_inode::ea_offset
infinint * ea_offset
offset in archive where to find EA
Definition: cat_inode.hpp:189
libdar::filesystem_specific_attribute_list
interface to fileystem for FSA
Definition: filesystem_specific_attribute.hpp:138
libdar::smart_pointer< pile_descriptor >
libdar::cat_inode::fsa_crc
crc * fsa_crc
CRC computed on FSA.
Definition: cat_inode.hpp:199
libdar::cat_inode::get_ea
const ea_attributs * get_ea() const
the returned value is the address of an existing file of the cat_inode object and shall not be delete...
libdar::cat_inode::ea_size
infinint * ea_size
storage size required by EA
Definition: cat_inode.hpp:191
libdar::cat_inode::uid
infinint uid
inode owner's user ID
Definition: cat_inode.hpp:177
libdar::cat_inode::gid
infinint gid
inode owner's group ID
Definition: cat_inode.hpp:178
libdar::infinint_to_fsa_scope
fsa_scope infinint_to_fsa_scope(const infinint &ref)
convert an infinint to fsa_scape
libdar::cat_inode::fsa_size
infinint * fsa_size
storage size required for FSA
Definition: cat_inode.hpp:198
libdar::ea_attributs
the class ea_attributs manages the set of EA that can be associated to an inode
Definition: ea.hpp:49
libdar::fsa_scope
std::set< fsa_family > fsa_scope
set of fsa families
Definition: fsa_family.hpp:70
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47