[posix][io]整理posix/io文件夹 (#5539)

* [posix][io]整理posix/io文件夹
- 将select.c移入到poll文件夹
- 将libc.c移入到tty文件夹，isatty函数归并到libc.c中, termios并入tty文件夹中
- 整理Sconscript

Signed-off-by: Meco Man <[email protected]>

* [libc][newlib]调整文件夹结构

Author: mysterywolf

components/libc/compilers/newlib/libc_syms.c

@@ -0,0 +1,10 @@
+This folder contains:
+
+| sub-folders | description               |
+| ----------- | ------------------------- |
+| aio         | Asynchronous I/O          |
+| mman        | Memory-Mapped I/O         |
+| poll        | Nonblocking I/O           |
+| stdio       | Standard Input/Output I/O |
+| termios     | Terminal I/O              |
+

components/libc/posix/io/README.md

@@ -3,24 +3,9 @@
 import os
 from building import *
 
-src     = []
 cwd     = GetCurrentDir()
-CPPPATH = [cwd]
 group   = []
 
-flag = False
-
-if GetDepend('RT_USING_POSIX_STDIO'):
-    src += ['libc.c']
-    flag = True
-
-if GetDepend('RT_USING_POSIX_SELECT'):
-    src += ['select.c']
-    flag = True
-
-if flag == True:
-    group = DefineGroup('POSIX', src, depend = [''], CPPPATH = CPPPATH)
-
 list = os.listdir(cwd)
 for d in list:
     path = os.path.join(cwd, d)

components/libc/posix/io/SConscript

@@ -7,7 +7,10 @@ src     = []
 CPPPATH = [cwd]
 
 if GetDepend('RT_USING_POSIX_POLL'):
-	src += ['poll.c']
+    src += ['poll.c']
+
+if GetDepend('RT_USING_POSIX_SELECT'):
+    src += ['select.c']
 
 group = DefineGroup('POSIX', src, depend = [''], CPPPATH = CPPPATH)
 

components/libc/posix/io/poll/SConscript

@@ -0,0 +1,22 @@
+# RT-Thread building script for component
+
+import os
+from building import *
+
+src     = []
+cwd     = GetCurrentDir()
+CPPPATH = [cwd]
+group   = []
+
+if GetDepend('RT_USING_POSIX_STDIO'):
+    src += ['libc.c']
+
+group = DefineGroup('POSIX', src, depend = [''], CPPPATH = CPPPATH)
+
+list = os.listdir(cwd)
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        group = group + SConscript(os.path.join(d, 'SConscript'))
+
+Return('group')

components/libc/posix/io/select.c components/libc/posix/io/poll/select.ccomponents/libc/posix/io/select.c renamed to components/libc/posix/io/poll/select.c

@@ -15,9 +15,8 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/time.h>
+#include <sys/errno.h>
 #include "libc.h"
-#include <stdio.h>
-#include <stdlib.h>
 
 int libc_system_init(void)
 {
@@ -108,7 +107,7 @@ int libc_stdio_get_console(void)
         return -1;
 }
 
-#else
+#elif defined(RT_USING_POSIX_STDIO)
 #define STDIO_DEVICE_NAME_MAX   32
 static int std_fd = -1;
 int libc_stdio_set_console(const char* device_name, int mode)
@@ -136,3 +135,24 @@ int libc_stdio_get_console(void) {
     return std_fd;
 }
 #endif /* defined(RT_USING_POSIX_STDIO) && defined(RT_USING_NEWLIB) */
+
+int isatty(int fd)
+{
+#if defined(RT_USING_CONSOLE) && defined(RT_USING_DEVICE)
+    if(fd == STDOUT_FILENO || fd == STDERR_FILENO)
+    {
+        return 1;
+    }
+#endif
+
+#ifdef RT_USING_POSIX_STDIO
+    if(fd == STDIN_FILENO)
+    {
+        return 1;
+    }
+#endif
+
+    rt_set_errno(ENOTTY);
+    return 0;
+}
+RTM_EXPORT(isatty);

components/libc/posix/io/stdio/SConscript

@@ -11,8 +11,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <sys/stat.h>
-#include <sys/statfs.h>
 #include <sys/errno.h>
 #include "termios.h"
 

components/libc/posix/io/libc.c components/libc/posix/io/stdio/libc.ccomponents/libc/posix/io/libc.c renamed to components/libc/posix/io/stdio/libc.c

@@ -1,7 +1,7 @@
 from building import *
 Import('rtconfig')
 
-src = Glob('*.c') + Glob('*.cpp') + Glob('arch/*.c')
+src = Glob('*.c') + Glob('arch/*.c')
 cwd = GetCurrentDir()
 group   = []
 CPPPATH = [cwd]