Filesystem: New function

New function rtems_filesystem_default_lseek_success().

cpukit/libcsupport/include/rtems/libio.h

@@ -844,13 +844,14 @@ typedef int (*rtems_filesystem_ioctl_t)(
  * @brief Moves the read/write file offset.
  *
  * @param[in, out] iop The IO pointer.
- * @param[in] offset The new offset.
- * @param[in] whence The reference position of the new offset.
+ * @param[in] offset The offset.
+ * @param[in] whence The reference position for the offset.
  *
  * @retval non-negative The new offset from the beginning of the file.
  * @retval -1 An error occured.  The errno is set to indicate the error.
  *
- * @see rtems_filesystem_default_lseek().
+ * @see rtems_filesystem_default_lseek() and
+ * rtems_filesystem_default_lseek_success().
  */
 typedef off_t (*rtems_filesystem_lseek_t)(
   rtems_libio_t *iop,
@@ -1019,7 +1020,18 @@ int rtems_filesystem_default_ioctl(
  */
 off_t rtems_filesystem_default_lseek(
   rtems_libio_t *iop,
-  off_t          length,
+  off_t          offset,
+  int            whence
+);
+
+/**
+ * @retval 0 Always.
+ *
+ * @see rtems_filesystem_lseek_t.
+ */
+off_t rtems_filesystem_default_lseek_success(
+  rtems_libio_t *iop,
+  off_t          offset,
   int            whence
 );
 

cpukit/libfs/Makefile.am

@@ -21,6 +21,7 @@ libdefaultfs_a_SOURCES = \
     src/defaults/default_chown.c \
     src/defaults/default_fcntl.c src/defaults/default_fsmount.c \
     src/defaults/default_ftruncate.c src/defaults/default_lseek.c \
+    src/defaults/default_lseek_success.c \
     src/defaults/default_readlink.c src/defaults/default_statvfs.c \
     src/defaults/default_utime.c \
     src/defaults/default_fdatasync.c  src/defaults/default_fstat.c \

cpukit/libfs/src/defaults/default_lseek_success.c

@@ -0,0 +1,29 @@
+
+/*
+ * Copyright (c) 2012 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <rtems/libio_.h>
+
+off_t rtems_filesystem_default_lseek_success(
+  rtems_libio_t *iop,
+  off_t offset,
+  int whence
+)
+{
+  return 0;
+}