10 files changed, 46 insertions, 75 deletions
diff --git a/components/libc/compilers/dlib/SConscript b/components/libc/compilers/dlib/SConscript
index 75a5812fab..3eee0e0184 100644
--- a/components/libc/compilers/dlib/SConscript
+++ b/components/libc/compilers/dlib/SConscript
@@ -11,7 +11,7 @@ CPPDEFINES = ['RT_USING_DLIBC']
 
 if rtconfig.PLATFORM == 'iar':
 
-    if GetDepend('RT_USING_DFS'):
+    if GetDepend('RT_LIBC_USING_FILEIO'):
         from distutils.version import LooseVersion
         from iar import IARVersion
 
@@ -20,7 +20,6 @@ if rtconfig.PLATFORM == 'iar':
         if LooseVersion(IARVersion()) < LooseVersion("8.20.1"):
             CPPDEFINES = CPPDEFINES + ['_DLIB_THREAD_SUPPORT']
 
-    group = DefineGroup('libc', src, depend = ['RT_USING_LIBC'], 
-        CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
+    group = DefineGroup('libc', src, depend = ['RT_USING_LIBC'], CPPPATH = CPPPATH, CPPDEFINES = CPPDEFINES)
 
 Return('group')
diff --git a/components/libc/compilers/dlib/libc.c b/components/libc/compilers/dlib/libc.c
index f540ac955f..f6e504bdae 100644
--- a/components/libc/compilers/dlib/libc.c
+++ b/components/libc/compilers/dlib/libc.c
@@ -7,29 +7,24 @@
  * Date           Author       Notes
  * 2017/10/15     bernard      the first version
  */
-#include <fcntl.h>
 #include <rtthread.h>
+#include <fcntl.h>
 #include "libc.h"
-
 #ifdef RT_USING_PTHREADS
 #include <pthread.h>
 #endif
 
 int libc_system_init(void)
 {
-#if defined(RT_USING_DFS) && defined(RT_USING_DFS_DEVFS)
+#ifdef RT_USING_POSIX
     rt_device_t dev_console;
 
     dev_console = rt_console_get_device();
     if (dev_console)
     {
-    #if defined(RT_USING_POSIX)
         libc_stdio_set_console(dev_console->parent.name, O_RDWR);
-    #else
-        libc_stdio_set_console(dev_console->parent.name, O_WRONLY);
-    #endif
     }
-#endif
+#endif /* RT_USING_POSIX */
 
 #if defined (RT_USING_PTHREADS) && !defined (RT_USING_COMPONENTS_INIT)
     pthread_system_init();
@@ -38,4 +33,3 @@ int libc_system_init(void)
     return 0;
 }
 INIT_COMPONENT_EXPORT(libc_system_init);
-
diff --git a/components/libc/compilers/dlib/libc.h b/components/libc/compilers/dlib/libc.h
index 9643c1161f..292dbde973 100644
--- a/components/libc/compilers/dlib/libc.h
+++ b/components/libc/compilers/dlib/libc.h
@@ -16,8 +16,10 @@ extern "C" {
 #endif
 
 int libc_system_init(void);
+#ifdef RT_USING_POSIX
 int libc_stdio_get_console(void);
 int libc_stdio_set_console(const char* device_name, int mode);
+#endif /* RT_USING_POSIX */
 
 #ifdef __cplusplus
 }
diff --git a/components/libc/compilers/dlib/stdio.c b/components/libc/compilers/dlib/stdio.c
index ed3f5dfef9..fea98aedd5 100644
--- a/components/libc/compilers/dlib/stdio.c
+++ b/components/libc/compilers/dlib/stdio.c
@@ -7,17 +7,17 @@
  * Date           Author       Notes
  * 2017/10/15     bernard      implement stdio for IAR dlib.
  */
+#include <rtthread.h>
+
+#ifdef RT_USING_POSIX
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-
-#include <rtthread.h>
+#include <fcntl.h>
+#include <unistd.h>
 #include "libc.h"
 
-#if defined(RT_USING_DFS) && defined(RT_USING_DFS_DEVFS)
-#include <dfs_posix.h>
-
 #define STDIO_DEVICE_NAME_MAX   32
 
 static int std_fd = -1;
@@ -46,4 +46,4 @@ int libc_stdio_get_console(void) {
     return std_fd;
 }
 
-#endif
+#endif /* RT_USING_POSIX */
diff --git a/components/libc/compilers/dlib/syscall_close.c b/components/libc/compilers/dlib/syscall_close.c
index 7ed1cc2f2d..bafe21aa4b 100644
--- a/components/libc/compilers/dlib/syscall_close.c
+++ b/components/libc/compilers/dlib/syscall_close.c
@@ -8,10 +8,8 @@
  * 2015-01-28     Bernard      first version
  */
 #include <rtthread.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
 #include <yfuns.h>
+#include <unistd.h>
 
 #pragma module_name = "?__close"
 int __close(int handle)
@@ -20,10 +18,9 @@ int __close(int handle)
         handle == _LLIO_STDERR ||
         handle == _LLIO_STDIN)
         return _LLIO_ERROR;
-
-#ifdef RT_USING_DFS
+#ifdef RT_LIBC_USING_FILEIO
     return close(handle);
 #else
-    return 0;
-#endif
+    return _LLIO_ERROR;
+#endif /* RT_LIBC_USING_FILEIO */
 }
diff --git a/components/libc/compilers/dlib/syscall_lseek.c b/components/libc/compilers/dlib/syscall_lseek.c
index 47a069bf0a..4a3a5c6a46 100644
--- a/components/libc/compilers/dlib/syscall_lseek.c
+++ b/components/libc/compilers/dlib/syscall_lseek.c
@@ -8,10 +8,8 @@
  * 2015-01-28     Bernard      first version
  */
 #include <rtthread.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
 #include <yfuns.h>
+#include <unistd.h>
 
 #pragma module_name = "?__lseek"
 long __lseek(int handle, long offset, int whence)
@@ -20,8 +18,7 @@ long __lseek(int handle, long offset, int whence)
         handle == _LLIO_STDERR ||
         handle == _LLIO_STDIN)
         return _LLIO_ERROR;
-
-#ifdef RT_USING_DFS
+#ifdef RT_LIBC_USING_FILEIO
     return lseek(handle, offset, whence);
 #else
     return _LLIO_ERROR;
diff --git a/components/libc/compilers/dlib/syscall_open.c b/components/libc/compilers/dlib/syscall_open.c
index 37bfcecb47..891b9afe58 100644
--- a/components/libc/compilers/dlib/syscall_open.c
+++ b/components/libc/compilers/dlib/syscall_open.c
@@ -10,17 +10,13 @@
 
 #include <rtthread.h>
 #include <yfuns.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
+#include <fcntl.h>
 
 #pragma module_name = "?__open"
 
 int __open(const char *filename, int mode)
 {
-#ifndef RT_USING_DFS
-  return _LLIO_ERROR;
-#else
+#ifdef RT_LIBC_USING_FILEIO
   int handle;
   int open_mode = O_RDONLY;
 
@@ -70,5 +66,7 @@ int __open(const char *filename, int mode)
     return _LLIO_ERROR;
 
   return handle;
-#endif
+#else
+  return _LLIO_ERROR;
+#endif /* RT_LIBC_USING_FILEIO */
 }
diff --git a/components/libc/compilers/dlib/syscall_read.c b/components/libc/compilers/dlib/syscall_read.c
index ae980be6ca..f65b502966 100644
--- a/components/libc/compilers/dlib/syscall_read.c
+++ b/components/libc/compilers/dlib/syscall_read.c
@@ -9,10 +9,8 @@
  */
 
 #include <rtthread.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
 #include <yfuns.h>
+#include <unistd.h>
 #include "libc.h"
 
 #define DBG_TAG    "dlib.syscall_read"
@@ -22,32 +20,26 @@
 #pragma module_name = "?__read"
 size_t __read(int handle, unsigned char *buf, size_t len)
 {
-#ifdef RT_USING_DFS
+#ifdef RT_LIBC_USING_FILEIO
     int size;
-#endif
 
     if (handle == _LLIO_STDIN)
     {
-#ifdef RT_USING_POSIX
         if (libc_stdio_get_console() < 0)
         {
             LOG_W("Do not invoke standard input before initializing libc");
             return 0;
         }
         return read(STDIN_FILENO, buf, len);
-#else
-        return _LLIO_ERROR;
-#endif
     }
     else if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
     {
         return _LLIO_ERROR;
     }
 
-#ifndef RT_USING_DFS
-    return _LLIO_ERROR;
-#else
     size = read(handle, buf, len);
     return size;
-#endif
+#else
+    return _LLIO_ERROR;
+#endif /* RT_LIBC_USING_FILEIO */
 }
diff --git a/components/libc/compilers/dlib/syscall_remove.c b/components/libc/compilers/dlib/syscall_remove.c
index 7d74236f4c..05bfbb67ae 100644
--- a/components/libc/compilers/dlib/syscall_remove.c
+++ b/components/libc/compilers/dlib/syscall_remove.c
@@ -8,17 +8,15 @@
  * 2015-01-28     Bernard      first version
  */
 #include <rtthread.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
 #include <yfuns.h>
+#include <unistd.h>
 
 #pragma module_name = "?remove"
 int remove(const char *val)
 {
-#ifndef RT_USING_DFS
-    return -1;
-#else
+#ifdef RT_USING_POSIX
     return unlink(val);
-#endif
+#else
+    return -1;
+#endif /* RT_USING_POSIX */
 }
diff --git a/components/libc/compilers/dlib/syscall_write.c b/components/libc/compilers/dlib/syscall_write.c
index ffee51882d..af47d64a3e 100644
--- a/components/libc/compilers/dlib/syscall_write.c
+++ b/components/libc/compilers/dlib/syscall_write.c
@@ -9,10 +9,8 @@
  */
 
 #include <rtthread.h>
-#ifdef RT_USING_DFS
-#include <dfs_posix.h>
-#endif
 #include <yfuns.h>
+#include <unistd.h>
 #include "libc.h"
 
 #define DBG_TAG    "dlib.syscall_write"
@@ -23,24 +21,20 @@
 
 size_t __write(int handle, const unsigned char *buf, size_t len)
 {
-#ifdef RT_USING_DFS
+#ifdef RT_LIBC_USING_FILEIO
     int size;
-#endif
+#endif /* RT_LIBC_USING_FILEIO */
 
     if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
     {
-#ifndef RT_USING_CONSOLE
-        return _LLIO_ERROR;
-#else
-
-#ifdef RT_USING_POSIX
+#ifdef RT_LIBC_USING_FILEIO
         if (libc_stdio_get_console() < 0)
         {
             LOG_W("Do not invoke standard output before initializing libc");
             return 0;
         }
         return write(STDOUT_FILENO, (void*)buf, len);
-#else
+#elif defined(RT_USING_CONSOLE)
         rt_device_t console_device;
 
         console_device = rt_console_get_device();
@@ -50,19 +44,19 @@ size_t __write(int handle, const unsigned char *buf, size_t len)
         }
 
         return len;
-#endif
-#endif
+#else
+        return _LLIO_ERROR;
+#endif /* RT_LIBC_USING_FILEIO */
     }
     else if (handle == _LLIO_STDIN)
     {
         return _LLIO_ERROR;
     }
 
-#ifndef RT_USING_DFS
-    return _LLIO_ERROR;
-#else
+#ifdef RT_LIBC_USING_FILEIO
     size = write(handle, buf, len);
     return size;
-#endif
+#else
+    return _LLIO_ERROR;
+#endif /* RT_LIBC_USING_FILEIO */
 }
-