More work on call tag.

__call.h

@@ -14,8 +14,10 @@ namespace jet {
       int pid;
       int status;
       int ix;
-      int fd[2];
-      char *argv[25];
+      int fdi[2];
+      int fdo[2];
+      int rc;
+      char *argv[50];
       
    };