port the patch in new_fstatat to new_fxstatat to fix failed test on EL8.

Features: pil4dfs

Required-githooks: true

Signed-off-by: Lei Huang <[email protected]>

src/client/dfuse/pil4dfs/int_dfs.c

@@ -1840,7 +1840,7 @@ check_path_with_dirfd(int dirfd, char **full_path_out, const char *rel_path, int
 		free(*full_path_out);
 		*full_path_out = NULL;
 	}
-	DS_ERROR(errno, "readlink() failed");
+	D_DEBUG(DB_ANY, "readlink() failed: %d (%s)\n", errno, strerror(errno));
 	return (-1);
 }
 
@@ -2573,6 +2573,17 @@ new_fxstatat(int ver, int dirfd, const char *path, struct stat *stat_buf, int fl
 			return new_xstat(1, path, stat_buf);
 	}
 
+	if (dirfd >= FD_FILE_BASE && dirfd < FD_DIR_BASE) {
+		if (path[0] == 0 && flags & AT_EMPTY_PATH)
+			/* same as fstat for a file. May need further work to handle flags */
+			return fstat(dirfd, stat_buf);
+		else if (path[0] == 0)
+			error = ENOENT;
+		else
+			error = ENOTDIR;
+		goto out_err;
+	}
+
 	idx_dfs = check_path_with_dirfd(dirfd, &full_path, path, &error);
 	if (error)
 		goto out_err;