Added call tag. Updated read tag.

__read.h

@@ -9,7 +9,12 @@ namespace jet {
    
     public:
       __read(coreutils::ZString &in, coreutils::MString &out, Global &global);
-   
+
+    private:
+      int fd;
+      int len;
+      char buffer[4096];
+      
    };
       
 }