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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Various functions to work with meta entries.
*
* Copyright (C) 2007-2008 David Härdeman <david@hardeman.nu>
* Copyright (C) 2012-2016 Przemyslaw Pawelczyk <przemoc@gmail.com>
*
* 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; only version 2 of the License is applicable.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#ifndef METAENTRY_H
#define METAENTRY_H
#include <stdbool.h>
#include "settings.h"
/* Data structure to hold all metadata for a file/dir */
struct metaentry {
struct metaentry *next; /* For the metahash chains */
struct metaentry *list; /* For creating additional lists of entries */
char *path;
unsigned pathlen;
char *owner;
char *group;
mode_t mode;
time_t mtime;
long mtimensec;
unsigned xattrs;
char **xattr_names;
ssize_t *xattr_lvalues;
char **xattr_values;
};
#define HASH_INDEXES 1024
/* Data structure to hold a number of metadata entries */
struct metahash {
struct metaentry *bucket[HASH_INDEXES];
unsigned count;
};
/* Create a metaentry for the file/dir/etc at path */
struct metaentry *mentry_create(const char *path, int with_mtime);
/* Recurses opath and adds metadata entries to the metaentry list */
void mentries_recurse_path(const char *opath, struct metahash **mhash,
msettings *st);
/* Stores a metaentry list to a file */
void mentries_tofile(const struct metahash *mhash, const char *path, int format);
/* Creates a metaentry list from a file */
void mentries_fromfile(struct metahash **mhash, const char *path);
/* Searches haystack for an xattr matching xattr number n in needle */
int mentry_find_xattr(struct metaentry *haystack,
struct metaentry *needle,
unsigned n);
#define DIFF_NONE 0x00
#define DIFF_OWNER 0x01
#define DIFF_GROUP 0x02
#define DIFF_MODE 0x04
#define DIFF_TYPE 0x08
#define DIFF_MTIME 0x10
#define DIFF_XATTR 0x20
#define DIFF_ADDED 0x40
#define DIFF_DELE 0x80
/* Compares two metaentries and returns an int with a bitmask of differences */
int mentry_compare(struct metaentry *left,
struct metaentry *right,
msettings *st);
/* Compares lists of real and stored metadata and calls pfunc for each */
void mentries_compare(struct metahash *mhashreal,
struct metahash *mhashstored,
void (*pfunc)(struct metaentry *real,
struct metaentry *stored,
int cmp),
msettings *st);
void mentries_dump(struct metahash *mhash);
#endif /* METAENTRY_H */
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