src/shared/copy.h

/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once

#include <fcntl.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/types.h>

typedef enum CopyFlags {
        COPY_REFLINK     = 1 << 0, /* Try to reflink */
        COPY_MERGE       = 1 << 1, /* Merge existing trees with our new one to copy */
        COPY_REPLACE     = 1 << 2, /* Replace an existing file if there's one */
        COPY_SAME_MOUNT  = 1 << 3, /* Don't descend recursively into other file systems, across mount point boundaries */
        COPY_MERGE_EMPTY = 1 << 4, /* Merge an existing, empty directory with our new tree to copy */
        COPY_CRTIME      = 1 << 5, /* Generate a user.crtime_usec xattr off the source crtime if there is one, on copying */
        COPY_SIGINT      = 1 << 6, /* Check for SIGINT regularly and return EINTR if seen (caller needs to block SIGINT) */
        COPY_MAC_CREATE  = 1 << 7, /* Create files with the correct MAC label (currently SELinux only) */
        COPY_HARDLINKS   = 1 << 8, /* Try to reproduce hard links */
} CopyFlags;

typedef int (*copy_progress_bytes_t)(uint64_t n_bytes, void *userdata);
typedef int (*copy_progress_path_t)(const char *path, const struct stat *st, void *userdata);

int copy_file_fd_full(const char *from, int to, CopyFlags copy_flags, copy_progress_bytes_t progress, void *userdata);
static inline int copy_file_fd(const char *from, int to, CopyFlags copy_flags) {
        return copy_file_fd_full(from, to, copy_flags, NULL, NULL);
}

int copy_file_full(const char *from, const char *to, int open_flags, mode_t mode, unsigned chattr_flags, unsigned chattr_mask, CopyFlags copy_flags, copy_progress_bytes_t progress, void *userdata);
static inline int copy_file(const char *from, const char *to, int open_flags, mode_t mode, unsigned chattr_flags, unsigned chattr_mask, CopyFlags copy_flags) {
        return copy_file_full(from, to, open_flags, mode, chattr_flags, chattr_mask, copy_flags, NULL, NULL);
}

int copy_file_atomic_full(const char *from, const char *to, mode_t mode, unsigned chattr_flags, unsigned chattr_mask, CopyFlags copy_flags, copy_progress_bytes_t progress, void *userdata);
static inline int copy_file_atomic(const char *from, const char *to, mode_t mode, unsigned chattr_flags, unsigned chattr_mask, CopyFlags copy_flags) {
        return copy_file_atomic_full(from, to, mode, chattr_flags, chattr_mask, copy_flags, NULL, NULL);
}

int copy_tree_at_full(int fdf, const char *from, int fdt, const char *to, uid_t override_uid, gid_t override_gid, CopyFlags copy_flags, copy_progress_path_t progress_path, copy_progress_bytes_t progress_bytes, void *userdata);
static inline int copy_tree_at(int fdf, const char *from, int fdt, const char *to, uid_t override_uid, gid_t override_gid, CopyFlags copy_flags) {
        return copy_tree_at_full(fdf, from, fdt, to, override_uid, override_gid, copy_flags, NULL, NULL, NULL);
}
static inline int copy_tree(const char *from, const char *to, uid_t override_uid, gid_t override_gid, CopyFlags copy_flags) {
        return copy_tree_at_full(AT_FDCWD, from, AT_FDCWD, to, override_uid, override_gid, copy_flags, NULL, NULL, NULL);
}

int copy_directory_fd_full(int dirfd, const char *to, CopyFlags copy_flags, copy_progress_path_t progress_path, copy_progress_bytes_t progress_bytes, void *userdata);
static inline int copy_directory_fd(int dirfd, const char *to, CopyFlags copy_flags) {
        return copy_directory_fd_full(dirfd, to, copy_flags, NULL, NULL, NULL);
}

int copy_directory_full(const char *from, const char *to, CopyFlags copy_flags, copy_progress_path_t progress_path, copy_progress_bytes_t progress_bytes, void *userdata);
static inline int copy_directory(const char *from, const char *to, CopyFlags copy_flags) {
        return copy_directory_full(from, to, copy_flags, NULL, NULL, NULL);
}

int copy_bytes_full(int fdf, int fdt, uint64_t max_bytes, CopyFlags copy_flags, void **ret_remains, size_t *ret_remains_size, copy_progress_bytes_t progress, void *userdata);
static inline int copy_bytes(int fdf, int fdt, uint64_t max_bytes, CopyFlags copy_flags) {
        return copy_bytes_full(fdf, fdt, max_bytes, copy_flags, NULL, NULL, NULL, NULL);
}

int copy_times(int fdf, int fdt, CopyFlags flags);
int copy_access(int fdf, int fdt);
int copy_rights_with_fallback(int fdf, int fdt, const char *patht);
static inline int copy_rights(int fdf, int fdt) {
        return copy_rights_with_fallback(fdf, fdt, NULL); /* no fallback */
}
int copy_xattr(int fdf, int fdt);