From 392a33d6c59b949d6264a3b438a38a4e3183eef2 Mon Sep 17 00:00:00 2001
From: armink <armink.ztl@gmail.com>
Date: Fri, 12 Jan 2018 16:55:47 +0800
Subject: [PATCH] [libc] Add libc_stdio_get_console .

---
 components/libc/compilers/armlibc/libc.h  | 1 +
 components/libc/compilers/armlibc/stdio.c | 5 +++++
 components/libc/compilers/dlib/libc.h     | 1 +
 components/libc/compilers/dlib/stdio.c    | 4 ++++
 components/libc/compilers/newlib/libc.h   | 1 +
 components/libc/compilers/newlib/stdio.c  | 7 +++++++
 6 files changed, 19 insertions(+)

diff --git a/components/libc/compilers/armlibc/libc.h b/components/libc/compilers/armlibc/libc.h
index aef0324018..e57897f0a8 100644
--- a/components/libc/compilers/armlibc/libc.h
+++ b/components/libc/compilers/armlibc/libc.h
@@ -31,6 +31,7 @@
 int libc_system_init(void);
 
 int libc_stdio_set_console(const char* device_name, int mode);
+int libc_stdio_get_console(void);
 int libc_stdio_read (void *buffer, size_t size);
 int libc_stdio_write(const void *buffer, size_t size);
 
diff --git a/components/libc/compilers/armlibc/stdio.c b/components/libc/compilers/armlibc/stdio.c
index cba51beb18..d1ac976568 100644
--- a/components/libc/compilers/armlibc/stdio.c
+++ b/components/libc/compilers/armlibc/stdio.c
@@ -58,6 +58,11 @@ int libc_stdio_set_console(const char* device_name, int mode)
     return std_fd;
 }
 
+int libc_stdio_get_console(void)
+{
+    return std_fd;
+}
+
 int libc_stdio_read(void *buffer, size_t size)
 {
     return read(std_fd, buffer, size);
diff --git a/components/libc/compilers/dlib/libc.h b/components/libc/compilers/dlib/libc.h
index db571d2ee1..d0a081d538 100644
--- a/components/libc/compilers/dlib/libc.h
+++ b/components/libc/compilers/dlib/libc.h
@@ -32,6 +32,7 @@
 int libc_system_init(void);
 
 int libc_stdio_set_console(const char* device_name, int mode);
+int libc_stdio_get_console(void);
 int libc_stdio_read (void *buffer, size_t size);
 int libc_stdio_write(const void *buffer, size_t size);
 
diff --git a/components/libc/compilers/dlib/stdio.c b/components/libc/compilers/dlib/stdio.c
index 24e421f2b3..12c1081d8b 100644
--- a/components/libc/compilers/dlib/stdio.c
+++ b/components/libc/compilers/dlib/stdio.c
@@ -58,6 +58,10 @@ int libc_stdio_set_console(const char* device_name, int mode)
     return std_fd;
 }
 
+int libc_stdio_get_console(void) {
+    return std_fd;
+}
+
 int libc_stdio_read(void *buffer, size_t size)
 {
     return read(std_fd, buffer, size);
diff --git a/components/libc/compilers/newlib/libc.h b/components/libc/compilers/newlib/libc.h
index 7cab52a11f..d077de9656 100644
--- a/components/libc/compilers/newlib/libc.h
+++ b/components/libc/compilers/newlib/libc.h
@@ -38,6 +38,7 @@
 
 int libc_system_init(void);
 int libc_stdio_set_console(const char* device_name, int mode);
+int libc_stdio_get_console(void);
 
 /* some time related function */
 int libc_set_time(const struct timespec *time);
diff --git a/components/libc/compilers/newlib/stdio.c b/components/libc/compilers/newlib/stdio.c
index 276e68050c..f28383818d 100644
--- a/components/libc/compilers/newlib/stdio.c
+++ b/components/libc/compilers/newlib/stdio.c
@@ -83,3 +83,10 @@ int libc_stdio_set_console(const char* device_name, int mode)
 
     return fileno(std_console);
 }
+
+int libc_stdio_get_console(void) {
+    if (std_console)
+        return fileno(std_console);
+    else
+        return -1;
+}