From 837604553b4483a324357dbbb7060491f3b2f39c Mon Sep 17 00:00:00 2001
From: mysterywolf <920369182@qq.com>
Date: Wed, 2 Sep 2020 10:22:47 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0unistd.c=E6=96=87=E4=BB=B6?=
MIME-Version: 1.0
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---
 components/libc/compilers/armlibc/unistd.h |  1 +
 components/libc/compilers/common/unistd.c  | 25 ++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 components/libc/compilers/common/unistd.c

diff --git a/components/libc/compilers/armlibc/unistd.h b/components/libc/compilers/armlibc/unistd.h
index 70187722d8..736fc219a8 100644
--- a/components/libc/compilers/armlibc/unistd.h
+++ b/components/libc/compilers/armlibc/unistd.h
@@ -7,3 +7,4 @@
  * Date           Author       Notes
  */
 #include "sys/unistd.h"
+
diff --git a/components/libc/compilers/common/unistd.c b/components/libc/compilers/common/unistd.c
new file mode 100644
index 0000000000..04a0886655
--- /dev/null
+++ b/components/libc/compilers/common/unistd.c
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020-09-01     Meco Man     First Version
+ */
+
+#include <termios.h>
+#include <unistd.h>
+
+#ifdef RT_USING_POSIX_TERMIOS
+int isatty(int fd)
+{
+    struct termios ts;
+    return(tcgetattr(fd,&ts) != -1);/*true if no error (is a tty)*/
+}
+#endif
+
+char *ttyname(int fd)
+{
+    return "/dev/tty0"; /*TODO: need to add more specific*/
+}