Added base version of file system infrastructure. This includes a major

overhaul of the RTEMS system call interface.  This base file system is
the "In-Memory File System" aka IMFS.

The design and implementation was done by the following people:

  + Joel Sherrill (joel@OARcorp.com)
  + Jennifer Averett (jennifer@OARcorp.com)
  + Steve "Mr Mount" Salitasc (salitasc@OARcorp.com)
  + Kerwin Wade (wade@OARcorp.com)

PROBLEMS
========
  + It is VERY likely that merging this will break the UNIX port.  This
    can/will be fixed.

  + There is likely some reentrancy/mutual exclusion needed.

  + Eventually, there should be a "mini-IMFS" description table to
    eliminate links, symlinks, etc to save memory.  All you need to
    have "classic RTEMS" functionality is technically directories
    and device IO.  All the rest could be left out to save memory.

1 files changed, 45 insertions, 0 deletions

diff --git a/c/src/exec/libcsupport/src/fdatasync.c b/c/src/exec/libcsupport/src/fdatasync.c
new file mode 100644
index 0000000000..58a4c4e118
--- /dev/null
+++ b/c/src/exec/libcsupport/src/fdatasync.c
@@ -0,0 +1,45 @@
+/*
+ *  fdatasync() - POSIX 1003.1b 6.6.2 - Synchronize the Data of a File
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <unistd.h>
+
+#include "libio_.h"
+
+int fdatasync(
+  int     fd
+)
+{
+  rtems_libio_t *iop;
+
+  /*
+   *  If this file descriptor is mapped to an external set of handlers,
+   *  then pass the request on to them.
+   */
+
+  if ( rtems_file_descriptor_type( fd ) )
+    set_errno_and_return_minus_one( EBADF );
+
+  /*
+   *  Now process the fdatasync().
+   */
+
+  iop = rtems_libio_iop( fd );
+  rtems_libio_check_fd( fd );
+  rtems_libio_check_permissions( iop, LIBIO_FLAGS_WRITE );
+
+  if ( !iop->handlers->fdatasync )
+    set_errno_and_return_minus_one( ENOTSUP );
+
+  return (*iop->handlers->fdatasync)( iop );
+}