From 86bb54fde6f3ed59050d724a7e98defd7c4f47a9 Mon Sep 17 00:00:00 2001
From: Meco Man <920369182@qq.com>
Date: Mon, 27 Sep 2021 06:51:40 -0400
Subject: [libc][syscalls]
 在标准输入输出前加校验，反正在libc初始化之前调用printf出问题
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---
 components/libc/compilers/dlib/syscall_read.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'components/libc/compilers/dlib/syscall_read.c')

diff --git a/components/libc/compilers/dlib/syscall_read.c b/components/libc/compilers/dlib/syscall_read.c
index e716d0b024..bdc694b7d8 100644
--- a/components/libc/compilers/dlib/syscall_read.c
+++ b/components/libc/compilers/dlib/syscall_read.c
@@ -15,6 +15,10 @@
 #include <yfuns.h>
 #include "libc.h"
 
+#define DBG_TAG    "dlib.syscall_read"
+#define DBG_LVL    DBG_INFO
+#include <rtdbg.h>
+
 #pragma module_name = "?__read"
 size_t __read(int handle, unsigned char *buf, size_t len)
 {
@@ -25,6 +29,11 @@ size_t __read(int handle, unsigned char *buf, size_t len)
     if (handle == _LLIO_STDIN)
     {
 #ifdef RT_USING_POSIX
+        if (libc_stdio_get_console() < 0)
+        {
+            LOG_E("invoke standard input before initializing libc");
+            return _LLIO_ERROR;
+        }
         return read(STDIN_FILENO, buf, len);
 #else
         return _LLIO_ERROR;
-- 
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