1 files changed, 125 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_initsupp.c b/cpukit/libfs/src/imfs/imfs_initsupp.c
new file mode 100644
index 0000000000..29b014d374
--- /dev/null
+++ b/cpukit/libfs/src/imfs/imfs_initsupp.c
@@ -0,0 +1,125 @@
+/*
+ *  IMFS Initialization
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>         /* for mkdir */
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <assert.h>
+
+#include "imfs.h"
+#include <rtems/libio_.h>
+#include <rtems/seterr.h>
+
+#if defined(IMFS_DEBUG)
+#include <stdio.h>
+#endif
+
+/*
+ *  IMFS_determine_bytes_per_block
+ */
+int imfs_memfile_bytes_per_block = 0;
+
+static int IMFS_determine_bytes_per_block(
+  int *dest_bytes_per_block,
+  int requested_bytes_per_block,
+  int default_bytes_per_block
+)
+{
+  rtems_boolean is_valid = FALSE;
+  int bit_mask;
+  /*
+   * check, whether requested bytes per block is valid
+   */
+  for (bit_mask = 16;
+       !is_valid && (bit_mask <= 512); 
+       bit_mask <<= 1) {
+    if (bit_mask == requested_bytes_per_block) {
+      is_valid = TRUE;
+    }
+  }
+  *dest_bytes_per_block = ((is_valid) 
+			   ? requested_bytes_per_block
+			   : default_bytes_per_block);
+  return 0;
+    
+}
+
+
+/*
+ *  IMFS_initialize
+ */
+
+int IMFS_initialize_support(
+  rtems_filesystem_mount_table_entry_t *temp_mt_entry,
+   rtems_filesystem_operations_table    *op_table,
+   rtems_filesystem_file_handlers_r     *memfile_handlers,
+   rtems_filesystem_file_handlers_r     *directory_handlers
+)
+{
+  IMFS_fs_info_t                        *fs_info;
+  IMFS_jnode_t                          *jnode;
+
+  /*
+   * determine/check value for imfs_memfile_bytes_per_block
+   */
+  IMFS_determine_bytes_per_block(&imfs_memfile_bytes_per_block,
+				 imfs_rq_memfile_bytes_per_block,
+				 IMFS_MEMFILE_DEFAULT_BYTES_PER_BLOCK);
+  
+  /*
+   *  Create the root node
+   *
+   *  NOTE: UNIX root is 755 and owned by root/root (0/0).
+   */
+
+  temp_mt_entry->mt_fs_root.node_access = IMFS_create_node(
+    NULL,
+    IMFS_DIRECTORY,
+    "",
+    ( S_IFDIR | 0755 ),
+    NULL
+  );
+
+  temp_mt_entry->mt_fs_root.handlers         = directory_handlers;
+  temp_mt_entry->mt_fs_root.ops              = op_table;
+  temp_mt_entry->pathconf_limits_and_options = IMFS_LIMITS_AND_OPTIONS;
+
+  /*
+   * Create custom file system data.
+   */
+  fs_info = calloc( 1, sizeof( IMFS_fs_info_t ) );
+  if ( !fs_info ){
+    free(temp_mt_entry->mt_fs_root.node_access);
+    rtems_set_errno_and_return_minus_one(ENOMEM);
+  }
+  temp_mt_entry->fs_info = fs_info;
+
+  /*
+   * Set st_ino for the root to 1.
+   */
+
+  fs_info->ino_count             = 1;
+  fs_info->memfile_handlers      = memfile_handlers;
+  fs_info->directory_handlers    = directory_handlers;
+
+  jnode = temp_mt_entry->mt_fs_root.node_access;
+  jnode->st_ino = fs_info->ino_count;
+
+  return 0;
+}