2 files changed, 4 insertions, 15 deletions
diff --git a/components/libc/compilers/dlib/sys/unistd.h b/components/libc/compilers/dlib/sys/unistd.h
index 29f68f24f8..9564daba8d 100644
--- a/components/libc/compilers/dlib/sys/unistd.h
+++ b/components/libc/compilers/dlib/sys/unistd.h
@@ -36,4 +36,8 @@
 
 #endif
 
+
+int     isatty      (int fd);
+char *  ttyname     (int desc);
+
 #endif /* _SYS_UNISTD_H */
diff --git a/components/libc/compilers/dlib/termios.h b/components/libc/compilers/dlib/termios.h
deleted file mode 100644
index 1956121225..0000000000
--- a/components/libc/compilers/dlib/termios.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright (c) 2006-2018, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-#ifndef _TERMIOS_H__
-#define _TERMIOS_H__
-
-#include <sys/types.h>
-#include <posix_termios.h>
-
-#endif