From aa16766188bdb4ea73e6c92fd884eb6ea8ec93dd Mon Sep 17 00:00:00 2001
From: "Martine S. Lenders" <m.lenders@fu-berlin.de>
Date: Wed, 18 Dec 2019 11:56:23 +0100
Subject: [PATCH] stdio_native: initial import

---
 Makefile.dep                           |  2 +-
 cpu/native/Makefile                    |  4 +++
 cpu/native/Makefile.dep                |  3 ++
 cpu/native/startup.c                   |  3 ++
 cpu/native/stdio_native/Makefile       |  1 +
 cpu/native/stdio_native/stdio_native.c | 39 ++++++++++++++++++++++++++
 6 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 cpu/native/stdio_native/Makefile
 create mode 100644 cpu/native/stdio_native/stdio_native.c

diff --git a/Makefile.dep b/Makefile.dep
index c2f6b5bd7fb66..dde5823a2e8de 100644
--- a/Makefile.dep
+++ b/Makefile.dep
@@ -423,7 +423,7 @@ ifneq (,$(filter newlib,$(USEMODULE)))
   ifeq (,$(filter newlib_syscalls_%,$(USEMODULE)))
     USEMODULE += newlib_syscalls_default
   endif
-  ifeq (,$(filter stdio_cdc_acm stdio_null stdio_rtt,$(USEMODULE)))
+  ifeq (,$(filter stdio_cdc_acm stdio_native stdio_null stdio_rtt,$(USEMODULE)))
     USEMODULE += stdio_uart
   endif
 endif
diff --git a/cpu/native/Makefile b/cpu/native/Makefile
index cc0605cc5f4d0..b266cb783e70f 100644
--- a/cpu/native/Makefile
+++ b/cpu/native/Makefile
@@ -15,6 +15,10 @@ ifneq (,$(filter socket_zep,$(USEMODULE)))
   DIRS += socket_zep
 endif
 
+ifneq (,$(filter stdio_native,$(USEMODULE)))
+  DIRS += stdio_native
+endif
+
 ifneq (,$(filter mtd_native,$(USEMODULE)))
   DIRS += mtd
 endif
diff --git a/cpu/native/Makefile.dep b/cpu/native/Makefile.dep
index 4923a58c59145..5563226643d39 100644
--- a/cpu/native/Makefile.dep
+++ b/cpu/native/Makefile.dep
@@ -1,3 +1,6 @@
 ifneq (,$(filter periph_spi,$(USEMODULE)))
   USEMODULE += periph_spidev_linux
 endif
+ifeq (,$(filter stdio_%,$(USEMODULE)))
+  USEMODULE += stdio_native
+endif
diff --git a/cpu/native/startup.c b/cpu/native/startup.c
index a059621d18145..33013a46cc39e 100644
--- a/cpu/native/startup.c
+++ b/cpu/native/startup.c
@@ -41,6 +41,7 @@
 
 #include "board_internal.h"
 #include "native_internal.h"
+#include "stdio_base.h"
 #include "tty_uart.h"
 
 #include "periph/init.h"
@@ -399,6 +400,8 @@ static void _reset_handler(void)
 __attribute__((constructor)) static void startup(int argc, char **argv, char **envp)
 {
     _native_init_syscalls();
+    /* initialize stdio as early as possible */
+    stdio_init();
 
     _native_argv = argv;
     _progname = argv[0];
diff --git a/cpu/native/stdio_native/Makefile b/cpu/native/stdio_native/Makefile
new file mode 100644
index 0000000000000..48422e909a47d
--- /dev/null
+++ b/cpu/native/stdio_native/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/cpu/native/stdio_native/stdio_native.c b/cpu/native/stdio_native/stdio_native.c
new file mode 100644
index 0000000000000..fe2ffef233dbf
--- /dev/null
+++ b/cpu/native/stdio_native/stdio_native.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2019 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ * @author  Martine S. Lenders <m.lenders@fu-berlin.de>
+ */
+
+#include "kernel_defines.h"
+#include "native_internal.h"
+#include "vfs.h"
+
+#include "stdio_base.h"
+
+void stdio_init(void)
+{
+    if (IS_USED(MODULE_VFS)) {
+        vfs_bind_stdio();
+    }
+}
+
+ssize_t stdio_read(void* buffer, size_t max_len)
+{
+    return real_read(STDIN_FILENO, buffer, max_len);
+}
+
+ssize_t stdio_write(const void* buffer, size_t len)
+{
+    return real_write(STDOUT_FILENO, buffer, len);
+}
+
+/** @} */