1 files changed, 158 insertions, 0 deletions
diff --git a/c/src/exec/libfs/src/imfs/imfs_initsupp.c b/c/src/exec/libfs/src/imfs/imfs_initsupp.c
new file mode 100644
index 0000000000..bb3a0f9aea
--- /dev/null
+++ b/c/src/exec/libfs/src/imfs/imfs_initsupp.c
@@ -0,0 +1,158 @@
+/*
+ *  IMFS Initialization
+ *
+ *  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 <sys/types.h>         /* for mkdir */
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <assert.h>
+
+#include "imfs.h"
+#include "libio_.h"
+
+#if defined(IMFS_DEBUG)
+#include <stdio.h>
+#endif
+
+/*
+ *  IMFS file system operations table
+ */
+
+rtems_filesystem_operations_table  IMFS_ops = {
+  IMFS_eval_path,
+  IMFS_evaluate_for_make,
+  IMFS_link,
+  IMFS_unlink,
+  IMFS_node_type,
+  IMFS_mknod,
+  IMFS_rmnod,
+  IMFS_chown,
+  IMFS_freenodinfo,
+  IMFS_mount,
+  IMFS_initialize,
+  IMFS_unmount,
+  IMFS_fsunmount,
+  IMFS_utime, 
+  IMFS_evaluate_link,
+  IMFS_symlink,
+  IMFS_readlink
+};
+
+/*
+ *  IMFS_initialize
+ */
+
+int IMFS_initialize(
+  rtems_filesystem_mount_table_entry_t *temp_mt_entry
+)
+{
+  IMFS_fs_info_t                        *fs_info;
+  IMFS_jnode_t                          *jnode;
+
+  /*
+   *  Create the root node
+   */
+
+  temp_mt_entry->mt_fs_root.node_access = IMFS_create_node(
+    NULL,
+    IMFS_DIRECTORY,
+    "",
+    ( S_IRWXO | S_IRWXG| S_IRWXU ),
+    NULL
+  );
+
+  temp_mt_entry->mt_fs_root.handlers    = &dir_handlers;
+  temp_mt_entry->mt_fs_root.ops         = &IMFS_ops;
+  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);
+    return 1;
+  }
+  temp_mt_entry->fs_info = fs_info;
+
+  /*
+   * Set st_ino for the root to 1.
+   */
+
+  fs_info->ino_count   = 1;
+
+  jnode = temp_mt_entry->mt_fs_root.node_access;
+  jnode->st_ino = fs_info->ino_count;
+
+  return 0;
+}
+
+#define jnode_get_control( jnode ) \
+  (&jnode->info.directory.Entries)
+
+#define jnode_has_no_children( jnode )  \
+  Chain_Is_empty( jnode_get_control( jnode ) )
+
+#define jnode_has_children( jnode ) \
+  ( ! jnode_has_no_children( jnode ) )
+
+#define jnode_get_first_child( jnode ) \
+    ((IMFS_jnode_t *)( Chain_Head( jnode_get_control( jnode ) )->next))
+
+
+int IMFS_fsunmount(
+  rtems_filesystem_mount_table_entry_t *temp_mt_entry
+)
+{
+   IMFS_jnode_t                     *jnode;
+   IMFS_jnode_t                     *next;
+   rtems_filesystem_location_info_t loc;       
+   int                              result = 0;
+
+   /* 
+    * Traverse tree that starts at the mt_fs_root and deallocate memory 
+    * associated memory space
+    */
+    
+   jnode = (IMFS_jnode_t *)temp_mt_entry->mt_fs_root.node_access;
+
+   do {
+     next = jnode->Parent;
+     loc.node_access = (void *)jnode;
+
+     if ( jnode->type != IMFS_DIRECTORY ) {
+        result = IMFS_unlink( &loc );
+        if (result != 0)
+          return -1;
+        jnode = next;
+     } else if ( jnode_has_no_children( jnode ) ) {
+        result = IMFS_unlink( &loc );
+        if (result != 0)
+          return -1;
+        jnode = next;
+     }
+     if ( jnode != NULL ) {
+       if ( jnode->type == IMFS_DIRECTORY ) {
+         if ( jnode_has_children( jnode ) )
+           jnode = jnode_get_first_child( jnode );
+       }
+     }
+   } while (jnode != NULL);
+
+   return 0;
+}
+
+
+