1 files changed, 67 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..4e0ca26b2a
--- /dev/null
+++ b/cpukit/libfs/src/imfs/imfs_unlink.c
@@ -0,0 +1,67 @@
+/*
+ *  IMFS_unlink 
+ *  
+ *  Routine to remove a link node from the tree.
+ *
+ *  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 <errno.h>
+#include <stdlib.h>
+
+#include "imfs.h"
+#include "libio_.h"
+
+int IMFS_unlink(
+  rtems_filesystem_location_info_t  *loc       /* IN */
+)
+{
+  IMFS_jnode_t                      *node;
+  rtems_filesystem_location_info_t   the_link;
+  int                                result;
+  
+  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 )
+      set_errno_and_return_minus_one( EINVAL );
+
+    the_link = *loc;
+    the_link.node_access = node->info.hard_link.link_node;
+
+    /*
+     * If this is the last referance to the node 
+     * Free the node that the link points to.
+     */
+    node->info.hard_link.link_node->st_nlink --;
+    IMFS_update_ctime( node->info.hard_link.link_node );
+    if ( node->info.hard_link.link_node->st_nlink < 1) {
+      result = IMFS_rmnod( &the_link );
+      if ( result != 0 )
+        return -1;
+    }
+  }
+
+  result = IMFS_rmnod( loc );
+
+  return result;
+}