[component] Sync to master (366e28f47682f76b3f6df85c3dcbd9785a01fa39).

2 files changed, 7 insertions, 2 deletions

diff --git a/components/libc/compilers/armlibc/stubs.c b/components/libc/compilers/armlibc/stubs.c
index 6e9f13d143..820daeff39 100644
--- a/components/libc/compilers/armlibc/stubs.c
+++ b/components/libc/compilers/armlibc/stubs.c
@@ -270,7 +270,10 @@ long _sys_flen(FILEHANDLE fh)
 
 int _sys_istty(FILEHANDLE fh)
 {
-    return 0;
+    if((STDIN <= fh) && (fh <= STDERR))
+        return 1;
+    else
+        return 0;
 }
 
 int remove(const char *filename)
diff --git a/components/libc/compilers/newlib/syscalls.c b/components/libc/compilers/newlib/syscalls.c
index e4cda478cb..759feafe67 100644
--- a/components/libc/compilers/newlib/syscalls.c
+++ b/components/libc/compilers/newlib/syscalls.c
@@ -9,6 +9,8 @@
 #include <reent.h>
 #include <sys/errno.h>
 #include <sys/time.h>
+#include <stdio.h>
+
 #include <rtthread.h>
 
 #ifdef RT_USING_DFS
@@ -218,7 +220,7 @@ _ssize_t
 _write_r(struct _reent *ptr, int fd, const void *buf, size_t nbytes)
 {
 #ifndef RT_USING_DFS
-    if (fd == 0)
+    if (fileno(stdout) == fd)
     {
         rt_device_t console;