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FastSync/src/shared/metadata.h
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feat: add rsync modify-window option
2026-09-03 17:01:45 +02:00

41 lines
1.6 KiB
C

#ifndef METADATA_H
#define METADATA_H
#include "file.h"
#include <stdbool.h>
#include <stdint.h>
#include <sys/stat.h>
#include <time.h>
/*
* Wire format (introduced in protocol version 2.0.0):
* int32_t present
* int32_t mode (was mode_t, platform-dependent)
* int32_t uid (was uid_t, platform-dependent)
* int32_t gid (was gid_t, platform-dependent)
* int64_t mtime_sec (was time_t, platform-dependent)
* int64_t mtime_nsec (was long, platform-dependent)
*
* Prior to 2.0.0 the wire format used the raw platform-dependent types,
* which broke compatiblity across different systems. All fields are now
* serialized as fixed-width integers.
*/
/* Size of metadata fields on wire, excluding the int32_t `present` field that
* is always sent first. The total wire size for present metadata is
* sizeof(int32_t) + FILE_METADATA_WIRE_SIZE (32 bytes on most platforms). */
#define FILE_METADATA_WIRE_SIZE (sizeof(int32_t) * 3 + sizeof(int64_t) * 2)
void metadata_to_buf(char** buf, const FileMetadata* m);
FileMetadata* metadata_from_buf(char** buf);
bool metadata_send(int file_descriptor, const FileMetadata* m);
FileMetadata* metadata_receive(int file_descriptor, int* ok);
void file_restore_metadata(const char* path, const FileMetadata* metadata);
bool file_restore_metadata_fd(int fd, const FileMetadata* metadata);
/* Compare timestamps using rsync's whole-second modification window. */
bool metadata_mtime_matches(time_t left_sec, long left_nsec, time_t right_sec, long right_nsec,
int modify_window);
#endif