拆分代码4

shell/Commands/FileSystem/CatCommand.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace CMLeonOS.Commands.FileSystem
+{
+    public static class CatCommand
+    {
+        public static void ProcessCat(CMLeonOS.FileSystem fileSystem, string args, Action<string> showError)
+        {
+            if (string.IsNullOrEmpty(args))
+            {
+                showError("Please specify a file name");
+            }
+            else
+            {
+                Console.WriteLine(fileSystem.ReadFile(args));
+            }
+        }
+    }
+}