Filesystem: Integrate error handling between c++/posix layers

Author: geky

features/filesystem/Dir.cpp

@@ -16,6 +16,7 @@
 
 #include "Dir.h"
 #include "mbed.h"
+#include <errno.h>
 
 
 Dir::Dir()
@@ -39,7 +40,7 @@ Dir::~Dir()
 int Dir::open(FileSystem *fs, const char *path)
 {
     if (_fs) {
-        return FS_ERROR_PARAMETER;
+        return -EINVAL;
     }
 
     _fs = fs;
@@ -49,7 +50,7 @@ int Dir::open(FileSystem *fs, const char *path)
 int Dir::close()
 {
     if (!_fs) {
-        return FS_ERROR_PARAMETER;
+        return -EINVAL;
     }
 
     int err = _fs->dir_close(_dir);

features/filesystem/File.cpp

@@ -16,6 +16,7 @@
 
 #include "File.h"
 #include "mbed.h"
+#include <errno.h>
 
 
 File::File()
@@ -39,7 +40,7 @@ File::~File()
 int File::open(FileSystem *fs, const char *path, int flags)
 {
     if (_fs) {
-        return FS_ERROR_PARAMETER;
+        return -EINVAL;
     }
 
     int err = fs->file_open(&_file, path, flags);
@@ -53,7 +54,7 @@ int File::open(FileSystem *fs, const char *path, int flags)
 int File::close()
 {
     if (!_fs) {
-        return FS_ERROR_PARAMETER;
+        return -EINVAL;
     }
 
     int err = _fs->file_close(_file);

features/filesystem/FileSystem.cpp

@@ -17,6 +17,7 @@
 
 #include "mbed.h"
 #include "filesystem/FileSystem.h"
+#include <errno.h>
 
 
 FileSystem::FileSystem(const char *name)
@@ -54,22 +55,22 @@ size_t FileSystem::file_size(fs_file_t file)
 
 int FileSystem::mkdir(const char *path, mode_t mode)
 {
-    return FS_ERROR_UNSUPPORTED;
+    return -ENOSYS;
 }
 
 int FileSystem::dir_open(fs_dir_t *dir, const char *path)
 {
-    return FS_ERROR_UNSUPPORTED;
+    return -ENOSYS;
 }
 
 int FileSystem::dir_close(fs_dir_t dir)
 {
-    return FS_ERROR_UNSUPPORTED;
+    return -ENOSYS;
 }
 
 ssize_t FileSystem::dir_read(fs_dir_t dir, char *path, size_t len)
 {
-    return FS_ERROR_UNSUPPORTED;
+    return -ENOSYS;
 }
 
 ssize_t FileSystem::dir_read(fs_dir_t dir, char *path, size_t len, uint8_t *type)

features/filesystem/FileSystem.h

@@ -26,23 +26,11 @@ namespace mbed {
 /** \addtogroup filesystem */
 /** @{*/
 
-/** Enum of standardized error codes
- *
- *  Valid error codes have negative values and may
- *  be returned by any network operation
- */
-enum fs_error {
-    FS_ERROR_OK          = 0,       ///< no error
-    FS_ERROR_UNSUPPORTED = -5001,   ///< unsupported functionality
-    FS_ERROR_PARAMETER   = -5002,   ///< invalid parameter
-};
 
 // Opaque pointer representing files and directories
 typedef void *fs_file_t;
 typedef void *fs_dir_t;
 
-
-
 /** A filesystem-like object is one that can be used to open files
  *  though it by fopen("/name/filename", flags)
  *