There is no node_fs.statfsSync in old node.js

Author: kanasimi

application/net/work_crawler/task.js

@@ -286,10 +286,12 @@ function module_code(library_namespace) {
 		var partition_stats = library_namespace
 				.partition_stats(this.main_directory);
 		// console.trace(partition_stats);
-		var free_space = partition_stats.bsize * partition_stats.bavail;
+		var free_space = partition_stats && partition_stats.bsize
+				* partition_stats.bavail;
 		if (free_space < 4 * 1024 * 1024) {
 			library_namespace.error('start_downloading: ' + '剩餘儲存空間過小，僅剩 '
 					+ library_namespace.to_KiB(free_space) + '。');
+			// 4: 最起碼會新開啟這麼多個檔案。
 			if (partition_stats.bavail < 4) {
 				callback && callback();
 				return;

application/platform/nodejs.js

@@ -90,6 +90,10 @@ function module_code(library_namespace) {
 	// get filesystem statistics
 	// https://nodejs.org/api/fs.html#class-fsstatfs
 	function partition_stats(directory_path) {
+		// There is no node_fs.statfsSync in old node.js
+		if (!node_fs.statfsSync)
+			return;
+
 		var partition_stats;
 		partition_stats = node_fs.statfsSync(directory_path);
 		// Total free space: partition_stats.bsize * partition_stats.bfree
@@ -346,8 +350,11 @@ function module_code(library_namespace) {
 					// gettext_config:{"id":"recursively-removing-subdirectories-of-$1"}
 					T : [ 'Recursively removing subdirectories of %1', path ]
 				}, 2, 'remove_fso');
+			} else {
+				// https://github.com/nodejs/node/issues/56049
+				// https://github.com/nodejs/node/issues/58759
+				library_namespace.debug('Delete ' + path, 3, 'remove_fso');
 			}
-			// https://github.com/nodejs/node/issues/56049
 			// console.trace(path, recursive);
 			node_fs.rmSync(path, {
 				recursive : !!recursive

application/storage/EPUB.js

@@ -2614,8 +2614,9 @@ function module_code(library_namespace) {
 			}
 		}, this);
 
-		// 先刪除舊的電子書檔案以防干擾。
-		library_namespace.remove_file(target_file);
+		library_namespace.debug('先刪除舊的電子書檔案以防干擾。', 1, 'archive_to_ZIP');
+		if (library_namespace.file_exists(target_file))
+			library_namespace.remove_file(target_file);
 
 		library_namespace.debug({
 			// gettext_config:{"id":"creating-an-ebook-with-7zip-$1"}