Function if

src/backend/replication/basebackup.c:1646–1689

#endif							/* HAVE_READLINK */
		}
		else if (S_ISDIR(statbuf.st_mode))
		{
			bool		skip_this_dir = false;
			ListCell   *lc;

			/*
			 * Store a directory entry in the tar file so we can get the
			 * permissions right.
			 */
			size += _tarWriteHeader(pathbuf + basepathlen + 1, NULL, &statbuf,
									sizeonly);

			/*
			 * Call ourselves recursively for a directory, unless it happens
			 * to be a separate tablespace located within PGDATA.
			 */
			foreach(lc, tablespaces)
			{
				tablespaceinfo *ti = (tablespaceinfo *) lfirst(lc);

				/*
				 * ti->rpath is the tablespace relative path within PGDATA, or
				 * NULL if the tablespace has been properly located somewhere
				 * else.
				 *
				 * Skip past the leading "./" in pathbuf when comparing.
				 */
				if (ti->rpath && strcmp(ti->rpath, pathbuf + 2) == 0)
				{
					skip_this_dir = true;
					break;
				}
			}

			/*
			 * skip sending directories inside pg_tblspc, if not required.
			 */
			if (strcmp(pathbuf, "./pg_tblspc") == 0 && !sendtblspclinks)
				skip_this_dir = true;

			if (!skip_this_dir)
				size += sendDir(pathbuf, basepathlen, sizeonly, tablespaces,
								sendtblspclinks, manifest, spcoid, exclude);
		}
		else if (S_ISREG(statbuf.st_mode))
		{
			bool		sent = false;