1 files changed, 82 insertions, 0 deletions
diff --git a/cpukit/libfs/src/imfs/imfs_unlink.c b/cpukit/libfs/src/imfs/imfs_unlink.c
new file mode 100644
index 0000000000..0ec176ed03
--- /dev/null
+++ b/cpukit/libfs/src/imfs/imfs_unlink.c
@@ -0,0 +1,82 @@
+/*
+ *  IMFS_unlink
+ *
+ *  Routine to remove a link node from the tree.
+ *
+ *  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 <errno.h>
+#include <stdlib.h>
+
+#include "imfs.h"
+#include <rtems/libio_.h>
+#include <rtems/seterr.h>
+
+int IMFS_unlink(
+  rtems_filesystem_location_info_t  *parentloc, /* IN */
+  rtems_filesystem_location_info_t  *loc        /* IN */
+)
+{
+  IMFS_jnode_t                      *node;
+  rtems_filesystem_location_info_t   the_link;
+  int                                result = 0;
+
+  node = loc->node_access;
+
+  /*
+   * Decrement the link counter of node pointed to and free the
+   * space.
+   */
+
+  /*
+   * If this is the last last pointer to the node
+   * free the node.
+   */
+
+  if ( node->type == IMFS_HARD_LINK ) {
+
+    if ( !node->info.hard_link.link_node )
+      rtems_set_errno_and_return_minus_one( EINVAL );
+
+    the_link = *loc;
+    the_link.node_access = node->info.hard_link.link_node;
+    IMFS_Set_handlers( &the_link );
+
+    /*
+     *  If removing the last hard link to a node, then we need
+     *  to remove the node that is a link and the node itself.
+     */
+
+    if ( node->info.hard_link.link_node->st_nlink == 1)
+    {
+        result = (*the_link.handlers->rmnod_h)( parentloc, &the_link );
+        if ( result != 0 )
+            return -1;
+    }
+    else
+    {
+        node->info.hard_link.link_node->st_nlink --;
+        IMFS_update_ctime( node->info.hard_link.link_node );
+    }
+  }
+
+  /*
+   *  Now actually free the node we were asked to free.
+   */
+
+  result = (*loc->handlers->rmnod_h)( parentloc, loc );
+
+  return result;
+}