diff --git a/components/dfs/src/dfs.c b/components/dfs/src/dfs.c
index d3a859e287331bbef265c497a2c60c413d83e1db..95fcfc2df619633ba5190943a316bdc01de22c2f 100644
--- a/components/dfs/src/dfs.c
+++ b/components/dfs/src/dfs.c
@@ -18,9 +18,9 @@
 #include <lwp.h>
 #endif
 
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
 #include <libc.h>
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
 
 /* Global variables */
 const struct dfs_filesystem_ops *filesystem_operation_table[DFS_FILESYSTEM_TYPES_MAX];
@@ -216,10 +216,10 @@ struct dfs_fd *fd_get(int fd)
     struct dfs_fd *d;
     struct dfs_fdtable *fdt;
 
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
     if ((0 <= fd) && (fd <= 2))
         fd = libc_stdio_get_console();
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
 
     fdt = dfs_fdtable_get();
     fd = fd - DFS_FD_OFFSET;
diff --git a/components/finsh/shell.c b/components/finsh/shell.c
index 5b96d0daf96d51777a7b830b78e5a2d582865a0e..c5242d9527f608772d7422abb3f8015823c1e6a2 100644
--- a/components/finsh/shell.c
+++ b/components/finsh/shell.c
@@ -146,7 +146,7 @@ int finsh_getchar(void)
 {
 #ifdef RT_USING_DEVICE
     char ch = 0;
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
     if(read(STDIN_FILENO, &ch, 1) > 0)
     {
         return ch;
@@ -170,14 +170,14 @@ int finsh_getchar(void)
         rt_sem_take(&shell->rx_sem, RT_WAITING_FOREVER);
 
     return ch;
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
 #else
     extern char rt_hw_console_getchar(void);
     return rt_hw_console_getchar();
 #endif /* RT_USING_DEVICE */
 }
 
-#if !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE)
+#if !defined(RT_USING_POSIX_DEVIO) && defined(RT_USING_DEVICE)
 static rt_err_t finsh_rx_ind(rt_device_t dev, rt_size_t size)
 {
     RT_ASSERT(shell != RT_NULL);
@@ -241,7 +241,7 @@ const char *finsh_get_device()
     RT_ASSERT(shell != RT_NULL);
     return shell->device->parent.name;
 }
-#endif /* !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE) */
+#endif /* !defined(RT_USING_POSIX_DEVIO) && defined(RT_USING_DEVICE) */
 
 /**
  * @ingroup finsh
@@ -443,7 +443,7 @@ void finsh_thread_entry(void *parameter)
     shell->echo_mode = 0;
 #endif
 
-#if !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE)
+#if !defined(RT_USING_POSIX_DEVIO) && defined(RT_USING_DEVICE)
     /* set console device as shell device */
     if (shell->device == RT_NULL)
     {
@@ -453,7 +453,7 @@ void finsh_thread_entry(void *parameter)
             finsh_set_device(console->parent.name);
         }
     }
-#endif /* !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE) */
+#endif /* !defined(RT_USING_POSIX_DEVIO) && defined(RT_USING_DEVICE) */
 
 #ifdef FINSH_USING_AUTH
     /* set the default password when the password isn't setting */
diff --git a/components/finsh/shell.h b/components/finsh/shell.h
index d421f603748d477cfaf94e1580dcb59d8ec2154e..ca1ec308edaf7f25b9de1cc2d9e4dceaf36dad75 100644
--- a/components/finsh/shell.h
+++ b/components/finsh/shell.h
@@ -78,7 +78,7 @@ struct finsh_shell
     rt_uint16_t line_position;
     rt_uint16_t line_curpos;
 
-#if !defined(RT_USING_POSIX_STDIO) && defined(RT_USING_DEVICE)
+#if !defined(RT_USING_POSIX_DEVIO) && defined(RT_USING_DEVICE)
     rt_device_t device;
 #endif
 
diff --git a/components/legacy/dfs/dfs_select.h b/components/legacy/dfs/dfs_select.h
index 6eaaf3bf89a5c18c649ab8ca6240792783543f49..e7cf190e819b21c8048dcdc3f05b09453552692a 100644
--- a/components/legacy/dfs/dfs_select.h
+++ b/components/legacy/dfs/dfs_select.h
@@ -13,4 +13,4 @@
 
 #include <sys/select.h>
 
-#endif
+#endif /* DFS_SELECT_H__ */
diff --git a/components/libc/Kconfig b/components/libc/Kconfig
index 94793be569be52e70d04ecc0bc5bdf08e7d7656a..a616754904ee03f7ad568b610859666518dd35f5 100644
--- a/components/libc/Kconfig
+++ b/components/libc/Kconfig
@@ -12,7 +12,7 @@ if RT_USING_LIBC
     config RT_LIBC_USING_FILEIO
         bool "Enable libc with file operation, eg.fopen/fwrite/fread/getchar"
         select RT_USING_POSIX
-        select RT_USING_POSIX_STDIO
+        select RT_USING_POSIX_DEVIO
         default n
 
     config RT_USING_MODULE
@@ -44,8 +44,8 @@ config RT_USING_POSIX
     default n
 
 if RT_USING_POSIX
-    config RT_USING_POSIX_STDIO
-        bool "Enable standard I/O, STDOUT_FILENO/STDIN_FILENO/STDERR_FILENO"
+    config RT_USING_POSIX_DEVIO
+        bool "Enable devices as file descriptors"
         select RT_USING_DFS
         select RT_USING_DFS_DEVFS
         default n
diff --git a/components/libc/compilers/armlibc/syscalls.c b/components/libc/compilers/armlibc/syscalls.c
index 71eacb1c417cbbe357b78e929525ea9d3299c4b7..bfd37771937ac2465b8150926520e9fdc8770bd1 100644
--- a/components/libc/compilers/armlibc/syscalls.c
+++ b/components/libc/compilers/armlibc/syscalls.c
@@ -21,9 +21,9 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/stat.h>
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
 #include "libc.h"
-#endif
+#endif /* RT_USING_POSIX_DEVIO */
 
 #define DBG_TAG    "armlibc.syscalls"
 #define DBG_LVL    DBG_INFO
@@ -149,7 +149,7 @@ int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
 
     if (fh == STDIN)
     {
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
         if (libc_stdio_get_console() < 0)
         {
             LOG_W("Do not invoke standard output before initializing libc");
@@ -159,7 +159,7 @@ int _sys_read(FILEHANDLE fh, unsigned char *buf, unsigned len, int mode)
         return 0; /* success */
 #else
         return 0; /* error */
-#endif
+#endif /* RT_USING_POSIX_DEVIO */
     }
     else if (fh == STDOUT || fh == STDERR)
     {
@@ -332,7 +332,7 @@ int fputc(int c, FILE *f)
 
 int fgetc(FILE *f)
 {
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
     char ch;
 
     if (libc_stdio_get_console() < 0)
@@ -343,7 +343,7 @@ int fgetc(FILE *f)
 
     if(read(STDIN_FILENO, &ch, 1) == 1)
         return ch;
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
     return 0; /* error */
 }
 
diff --git a/components/libc/compilers/dlib/syscall_read.c b/components/libc/compilers/dlib/syscall_read.c
index 469ea7c1ddcc52d78993ea8618010da60872d2af..62bc05d2434cfb349791bb0e8e69d7c6f579d585 100644
--- a/components/libc/compilers/dlib/syscall_read.c
+++ b/components/libc/compilers/dlib/syscall_read.c
@@ -11,9 +11,9 @@
 #include <rtthread.h>
 #include <LowLevelIOInterface.h>
 #include <unistd.h>
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
 #include "libc.h"
-#endif
+#endif /* RT_USING_POSIX_DEVIO */
 
 #define DBG_TAG    "dlib.syscall_read"
 #define DBG_LVL    DBG_INFO
@@ -39,7 +39,7 @@ size_t __read(int handle, unsigned char *buf, size_t len)
 
     if (handle == _LLIO_STDIN)
     {
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
         if (libc_stdio_get_console() < 0)
         {
             LOG_W("Do not invoke standard input before initializing libc");
@@ -48,7 +48,7 @@ size_t __read(int handle, unsigned char *buf, size_t len)
         return read(STDIN_FILENO, buf, len); /* return the length of the data read */
 #else
         return _LLIO_ERROR;
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
     }
     else if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
     {
diff --git a/components/libc/compilers/dlib/syscall_write.c b/components/libc/compilers/dlib/syscall_write.c
index d5ede3e59eb866d01e2447b46f460186c98897a4..2bc5863d8aa81ea655a80d3164f357a0b78ecad0 100644
--- a/components/libc/compilers/dlib/syscall_write.c
+++ b/components/libc/compilers/dlib/syscall_write.c
@@ -11,10 +11,6 @@
 #include <rtthread.h>
 #include <LowLevelIOInterface.h>
 #include <unistd.h>
-#ifdef RT_USING_POSIX_STDIO
-#include "libc.h"
-#endif
-
 #define DBG_TAG    "dlib.syscall_write"
 #define DBG_LVL    DBG_INFO
 #include <rtdbg.h>
diff --git a/components/libc/compilers/gcc/newlib/syscalls.c b/components/libc/compilers/gcc/newlib/syscalls.c
index 8bb9af940ddb785ad39cb059a33b6c8f7c029ce0..8fe8c5be4b7c24bbe57761c3b9ae1f50169a301b 100644
--- a/components/libc/compilers/gcc/newlib/syscalls.c
+++ b/components/libc/compilers/gcc/newlib/syscalls.c
@@ -20,12 +20,12 @@
 #include <unistd.h>
 #include <sys/errno.h>
 #include <sys/stat.h>
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
 #include "libc.h"
-#endif
+#endif /* RT_USING_POSIX_DEVIO */
 #ifdef RT_USING_MODULE
 #include <dlmodule.h>
-#endif
+#endif /* RT_USING_MODULE */
 
 #define DBG_TAG    "newlib.syscalls"
 #define DBG_LVL    DBG_INFO
@@ -225,7 +225,7 @@ _ssize_t _read_r(struct _reent *ptr, int fd, void *buf, size_t nbytes)
     _ssize_t rc;
     if (fd == STDIN_FILENO)
     {
-#ifdef RT_USING_POSIX_STDIO
+#ifdef RT_USING_POSIX_DEVIO
         if (libc_stdio_get_console() < 0)
         {
             LOG_W("Do not invoke standard input before initializing libc");
@@ -234,7 +234,7 @@ _ssize_t _read_r(struct _reent *ptr, int fd, void *buf, size_t nbytes)
 #else
         ptr->_errno = ENOTSUP;
         return -1;
-#endif /* RT_USING_POSIX_STDIO */
+#endif /* RT_USING_POSIX_DEVIO */
     }
     else if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
     {
diff --git a/components/libc/posix/src/SConscript b/components/libc/posix/src/SConscript
index 78a2a933ed66c0a8e17060a03fefea913d9da814..067d598b74def6bbfa8483340b872553c01158f5 100644
--- a/components/libc/posix/src/SConscript
+++ b/components/libc/posix/src/SConscript
@@ -6,7 +6,7 @@ src     = ['unistd.c']
 cwd     = GetCurrentDir()
 CPPPATH = [cwd]
 
-if GetDepend('RT_USING_POSIX_STDIO'):
+if GetDepend('RT_USING_POSIX_DEVIO'):
     src += ['libc.c']
 
 if GetDepend('RT_USING_POSIX_DELAY'):