+typedef enum CopyFlags {
+ COPY_REFLINK = 0x1, /* try to reflink */
+ COPY_MERGE = 0x2, /* merge existing trees with our new one to copy */
+ COPY_REPLACE = 0x4, /* replace an existing file if there's one */
+} CopyFlags;
+
+int copy_file_fd(const char *from, int to, CopyFlags copy_flags);
+int copy_file(const char *from, const char *to, int open_flags, mode_t mode, unsigned chattr_flags, CopyFlags copy_flags);
+int copy_file_atomic(const char *from, const char *to, mode_t mode, unsigned chattr_flags, CopyFlags copy_flags);
+int copy_tree(const char *from, const char *to, uid_t override_uid, gid_t override_gid, CopyFlags copy_flags);
+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);
+int copy_directory_fd(int dirfd, const char *to, CopyFlags copy_flags);
+int copy_directory(const char *from, const char *to, CopyFlags copy_flags);
+int copy_bytes(int fdf, int fdt, uint64_t max_bytes, CopyFlags copy_flags);