Updated syscall.c to include filesize

userprog/syscall.c

@@ -78,8 +78,8 @@ syscall_handler (struct intr_frame *f UNUSED)
   case SYSCALL_WRITE:
     syscall_write(f);
     break;
-  case SYSCALL_OPEN:
-    syscall_open(f);
+  case SYSCALL_FILESIZE:
+	  syscall_filesize(f);
 	  break;
   default:
     printf ("WARNING: Invalid Syscall (%d)\n", syscall_number);