Filesystem: PR1398: Fix lseek() mechanic

According to POSIX the lseek() function shall not, by itself, extend the
size of a file.

Remove the size field of rtems_libio_t.  A file has only one size but
may have multiple open file descriptors.  Thus a file size field in the
file descriptor may lead to inconsistencies.

New default handlers rtems_filesystem_default_lseek_file() and
rtems_filesystem_default_lseek_directory().

1 files changed, 0 insertions, 32 deletions

diff --git a/cpukit/libfs/src/dosfs/msdos_dir.c b/cpukit/libfs/src/dosfs/msdos_dir.c
index 67a0bdaaa9..be6b5a91ff 100644
--- a/cpukit/libfs/src/dosfs/msdos_dir.c
+++ b/cpukit/libfs/src/dosfs/msdos_dir.c
@@ -465,38 +465,6 @@ msdos_dir_read(rtems_libio_t *iop, void *buffer, size_t count)
  *     no write for directory
  */
 
-/* msdos_dir_lseek --
- *
- *  This routine will behave in one of three ways based on the state of
- *  argument whence. Based on the state of its value the offset argument will
- *  be interpreted using one of the following methods:
- *
- *     SEEK_SET - offset is the absolute byte offset from the start of the
- *                logical start of the dirent sequence that represents the
- *                directory
- *     SEEK_CUR - offset is used as the relative byte offset from the current
- *                directory position index held in the iop structure
- *     SEEK_END - N/A --> This will cause an assert.
- *
- * PARAMETERS:
- *     iop    - file control block
- *     offset - offset
- *     whence - predefine directive
- *
- * RETURNS:
- *     RC_OK on success, or -1 if error occured (errno
- *     set apropriately).
- */
-off_t
-msdos_dir_lseek(rtems_libio_t *iop, off_t offset, int whence)
-{
-    if (iop->offset >= 0 && iop->offset <= iop->size) {
-        return 0;
-    } else {
-        rtems_set_errno_and_return_minus_one(EINVAL);
-    }
-}
-
 /* msdos_dir_stat --
  *
  * This routine will obtain the following information concerning the current